National Emission Standards for Hazardous Air Pollutants for Cellulose Products Manufacturing Residual Risk and Technology Review, 47346-47404 [2019-18330]
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Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 63
EPA–HQ–OAR–2018–0415; FRL–9998–78–
OAR]
RIN 2060–AU23
National Emission Standards for
Hazardous Air Pollutants for Cellulose
Products Manufacturing Residual Risk
and Technology Review
Environmental Protection
Agency (EPA).
ACTION: Proposed rule.
AGENCY:
The U.S. Environmental
Protection Agency (EPA) is proposing
amendments to the National Emissions
Standards for Hazardous Air Pollutants
(NESHAP) for Cellulose Products
Manufacturing to address the results of
the residual risk and technology review
(RTR) that the EPA is required to
conduct under the Clean Air Act (CAA).
The EPA is proposing to amend
provisions addressing periods of
startup, shutdown, and malfunction
(SSM); to add provisions regarding
periodic emissions testing and
electronic reporting; to provide more
flexibility for monitoring requirements;
and to make technical and editorial
changes. While the proposed
amendments would not result in
reductions in emissions of hazardous air
pollutants (HAP), this action, if
finalized, would result in improved
monitoring, compliance, and
implementation of the rule.
DATES: Comments. Comments must be
received on or before October 24, 2019.
Under the Paperwork Reduction Act
(PRA), comments on the information
collection provisions are best assured of
consideration if the Office of
Management and Budget (OMB)
receives a copy of your comments on or
before October 9, 2019.
Public hearing. If anyone contacts us
requesting a public hearing on or before
September 16, 2019, we will hold a
hearing. Additional information about
the hearing, if requested, will be
published in a subsequent Federal
Register document and posted at
https://www.epa.gov/stationary-sourcesair-pollution/cellulose-productsmanufacturing-national-emissionstandards. See SUPPLEMENTARY
INFORMATION for information on
requesting and registering for a public
hearing.
ADDRESSES: You may send comments,
identified by Docket ID No. EPA–HQ–
OAR–2018–0415, by any of the
following methods:
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SUMMARY:
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• Federal eRulemaking Portal:
https://www.regulations.gov/ (our
preferred method). Follow the online
instructions for submitting comments.
• Email: a-and-r-docket@epa.gov.
Include Docket ID No. EPA–HQ–OAR–
2018–0415 in the subject line of the
message.
• Fax: (202) 566–9744. Attention
Docket ID No. EPA–HQ–OAR–2018–
0415.
• Mail: U.S. Environmental
Protection Agency, EPA Docket Center,
Docket ID No. EPA–HQ–OAR–2018–
0415, Mail Code 28221T, 1200
Pennsylvania Avenue NW, Washington,
DC 20460.
• Hand/Courier Delivery: EPA Docket
Center, WJC West Building, Room 3334,
1301 Constitution Avenue NW,
Washington, DC 20004. The Docket
Center’s hours of operation are 8:30
a.m.–4:30 p.m., Monday–Friday (except
federal holidays).
Instructions: All submissions received
must include the Docket ID No. for this
rulemaking. Comments received may be
posted without change to https://
www.regulations.gov/, including any
personal information provided. For
detailed instructions on sending
comments and additional information
on the rulemaking process, see the
SUPPLEMENTARY INFORMATION section of
this document.
FOR FURTHER INFORMATION CONTACT: For
questions about this proposed action,
contact Dr. Kelley Spence, Sector
Policies and Programs Division (Mail
Code: E143–03), Office of Air Quality
Planning and Standards, U.S.
Environmental Protection Agency,
Research Triangle Park, North Carolina
27711; telephone number: (919) 541–
3158; fax number: (919) 541–0516; and
email address: spence.kelley@epa.gov.
For specific information regarding the
risk modeling methodology, contact Mr.
James Hirtz, Health and Environmental
Impacts Division (C539–02), Office of
Air Quality Planning and Standards,
U.S. Environmental Protection Agency,
Research Triangle Park, North Carolina
27711; telephone number: (919) 541–
0881; and email address: hirtz.james@
epa.gov. For questions about monitoring
and testing requirements, contact Ms.
Theresa Lowe, Sector Policies and
Programs Division (D243–05), Office of
Air Quality Planning and Standards,
U.S. Environmental Protection Agency,
Research Triangle Park, North Carolina
27711; telephone number: (919) 541–
4786; fax number: (919) 541–4991; and
email address: lowe.theresa@epa.gov.
For information about the applicability
of the NESHAP to a particular entity,
contact Ms. Maria Malave, Office of
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Enforcement and Compliance
Assurance, U.S. Environmental
Protection Agency, WJC South Building
(Mail Code 2227A), 1200 Pennsylvania
Avenue NW, Washington DC 20460;
telephone number: (202) 564–7027; and
email address: malave.maria@epa.gov.
SUPPLEMENTARY INFORMATION:
Public hearing. Please contact Ms.
Virginia Hunt at (919) 541–0832 or by
email at hunt.virginia@epa.gov to
request a public hearing, to register to
speak at the public hearing, or to inquire
as to whether a public hearing will be
held.
Docket. The EPA has established a
docket for this rulemaking under Docket
ID No. EPA–HQ–OAR–2018–0415. All
documents in the docket are listed in
Regulations.gov. Although listed, some
information is not publicly available,
e.g., CBI (Confidential Business
Information) or other information whose
disclosure is restricted by statute.
Certain other material, such as
copyrighted material, is not placed on
the internet and will be publicly
available only in hard copy. Publicly
available docket materials are available
either electronically in Regulations.gov
or in hard copy at the EPA Docket
Center, Room 3334, WJC West Building,
1301 Constitution Avenue NW,
Washington, DC. The Public Reading
Room is open from 8:30 a.m. to 4:30
p.m., Monday through Friday, excluding
legal holidays. The telephone number
for the Public Reading Room is (202)
566–1744, and the telephone number for
the EPA Docket Center is (202) 566–
1742.
Instructions. Direct your comments to
Docket ID No. EPA–HQ–OAR–2018–
0415. The EPA’s policy is that all
comments received will be included in
the public docket without change and
may be made available online at https://
www.regulations.gov/, including any
personal information provided, unless
the comment includes information
claimed to be CBI or other information
whose disclosure is restricted by statute.
Do not submit information that you
consider to be CBI or otherwise
protected through https://
www.regulations.gov/ or email. This
type of information should be submitted
by mail as discussed below.
The EPA may publish any comment
received to its public docket.
Multimedia submissions (audio, video,
etc.) must be accompanied by a written
comment. The written comment is
considered the official comment and
should include discussion of all points
you wish to make. The EPA will
generally not consider comments or
comment contents located outside of the
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primary submission (i.e., on the Web,
cloud, or other file sharing system). For
additional submission methods, the full
EPA public comment policy,
information about CBI or multimedia
submissions, and general guidance on
making effective comments, please visit
https://www.epa.gov/dockets/
commenting-epa-dockets.
The https://www.regulations.gov/
website allows you to submit your
comment anonymously, which means
the EPA will not know your identity or
contact information unless you provide
it in the body of your comment. If you
send an email comment directly to the
EPA without going through https://
www.regulations.gov/, your email
address will be automatically captured
and included as part of the comment
that is placed in the public docket and
made available on the internet. If you
submit an electronic comment, the EPA
recommends that you include your
name and other contact information in
the body of your comment and with any
digital storage media you submit. If the
EPA cannot read your comment due to
technical difficulties and cannot contact
you for clarification, the EPA may not
be able to consider your comment.
Electronic files should not include
special characters or any form of
encryption and be free of any defects or
viruses. For additional information
about the EPA’s public docket, visit the
EPA Docket Center homepage at https://
www.epa.gov/dockets.
Submitting CBI. Do not submit
information containing CBI to the EPA
through https://www.regulations.gov/ or
email. Clearly mark the part or all of the
information that you claim to be CBI.
For CBI information on any digital
storage media that you mail to the EPA,
mark the outside of the digital storage
media as CBI and then identify
electronically within the digital storage
media the specific information that is
claimed as CBI. In addition to one
complete version of the comments that
includes information claimed as CBI,
you must submit a copy of the
comments that does not contain the
information claimed as CBI directly to
the public docket through the
procedures outlined in Instructions
above. If you submit any digital storage
media that does not contain CBI, mark
the outside of the digital storage media
clearly that it does not contain CBI.
Information not marked as CBI will be
included in the public docket and the
EPA’s electronic public docket without
prior notice. Information marked as CBI
will not be disclosed except in
accordance with procedures set forth in
40 Code of Federal Regulations (CFR)
part 2. Send or deliver information
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identified as CBI only to the following
address: OAQPS Document Control
Officer (C404–02), OAQPS, U.S.
Environmental Protection Agency,
Research Triangle Park, North Carolina
27711, Attention Docket ID No. EPA–
HQ–OAR–2018–0415.
Preamble acronyms and
abbreviations. We use multiple
acronyms and terms in this preamble.
While this list may not be exhaustive, to
ease the reading of this preamble and for
reference purposes, the EPA defines the
following terms and acronyms here:
%R percent recovery
ADI Applicability Determination Index
AEGL acute exposure guideline level
AERMOD air dispersion model used by the
HEM–3 model
ASTM American Society for Testing and
Materials
CAA Clean Air Act
CalEPA California EPA
CBI Confidential Business Information
CDX Central Data Exchange
CEDRI Compliance and Emissions Data
Reporting Interface
CEMS continuous emissions monitoring
system
CEP Cellulose Ethers Production
CFR Code of Federal Regulations
CMC carboxymethyl cellulose
COS carbonyl sulfide
CS2 carbon disulfide
EPA Environmental Protection Agency
ERPG Emergency Response Planning
Guideline
ERT Electronic Reporting Tool
FTIR Fourier Transform Infrared
GACT generally available control
technology
H2S hydrogen sulfide
HAP hazardous air pollutant(s)
HCl hydrochloric acid
HEC hydroxyethyl cellulose
HEM-3 Human Exposure Model-3
HF hydrogen fluoride
HI hazard index
HPC hydroxypropyl cellulose
HPMC hydroxypropyl methyl cellulose
HQ hazard quotient
IBR incorporation by reference
ICR information collection request
ID identifier
IRIS Integrated Risk Information System
km kilometers
km2 square kilometers
MACT maximum achievable control
technology
MC methyl cellulose
mg/kg-day milligrams per kilogram per day
mg/m3 milligrams per cubic meter
MIR maximum individual risk
MVP Miscellaneous Viscose Processes
NAAQS National Ambient Air Quality
Standards
NAICS North American Industry
Classification System
NaOH sodium hydroxide
NATA National Air Toxics Assessment
NESHAP national emission standards for
hazardous air pollutants
NRC National Research Council
NTTAA National Technology Transfer and
Advancement Act
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OAQPS Office of Air Quality Planning and
Standards
OECA Office of Enforcement and
Compliance Assurance
OMB Office of Management and Budget
PAH polycyclic aromatic hydrocarbons
PB–HAP hazardous air pollutants known to
be persistent and bio-accumulative in the
environment
PDF portable document format
PM particulate matter
POM polycyclic organic matter
ppm parts per million
PRA Paperwork Reduction Act
QA quality assurance
RBLC Reasonably Available Control
Technology/Best Available Control
Technology/Lowest Achievable Emission
Limits Clearinghouse
REL reference exposure level
RFA Regulatory Flexibility Act
RfC reference concentration
RfD reference dose
RTR residual risk and technology review
SAB Science Advisory Board
SBA Small Business Administration
SCC source classification code
SSM startup, shutdown, and malfunction
TOSHI target organ-specific hazard index
tpy tons per year
TRIM.FaTE Total Risk Integrated
Methodology.Fate, Transport, and
Ecological Exposure model
UF uncertainty factor
mg/m3 microgram per cubic meter
UMRA Unfunded Mandates Reform Act
URE unit risk estimate
USGS United States Geological Survey
VCS voluntary consensus standards
VOC volatile organic compounds
Organization of this document. The
information in this preamble is
organized as follows:
I. General Information
A. Does this action apply to me?
B. Where can I get a copy of this document
and other related information?
II. Background
A. What is the statutory authority for this
action?
B. What is this source category and how
does the current NESHAP regulate its
HAP emissions?
C. What data collection activities were
conducted to support this action?
D. What other relevant background
information and data are available?
III. Analytical Procedures and DecisionMaking
A. How do we consider risk in our
decision-making under CAA section
112(f)(2)?
B. How do we perform the technology
review?
C. How do we estimate post-MACT risk
posed by the source category?
IV. Analytical Results and Proposed
Decisions
A. What are the results of the risk
assessment and analyses?
B. What are our proposed decisions
regarding risk acceptability, ample
margin of safety, and adverse
environmental effect?
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C. What are the results and proposed
decisions based on our technology
review?
D. What other actions are we proposing?
E. What compliance dates are we
proposing?
V. Summary of Cost, Environmental, and
Economic Impacts
A. What are the affected sources?
B. What are the air quality impacts?
C. What are the cost impacts?
D. What are the economic impacts?
E. What are the benefits?
VI. Request for Comments
VII. Submitting Data Corrections
VIII. Statutory and Executive Order Reviews
A. Executive Order 12866: Regulatory
Planning and Review and Executive
Order 13563: Improving Regulation and
Regulatory Review
B. Executive Order 13771: Reducing
Regulation and Controlling Regulatory
Costs
C. Paperwork Reduction Act (PRA)
D. Regulatory Flexibility Act (RFA)
E. Unfunded Mandates Reform Act
(UMRA)
F. Executive Order 13132: Federalism
G. Executive Order 13175: Consultation
and Coordination With Indian Tribal
Governments
H. Executive Order 13045: Protection of
Children From Environmental Health
Risks and Safety Risks
I. Executive Order 13211: Actions
Concerning Regulations That
Significantly Affect Energy Supply,
Distribution, or Use
J. National Technology Transfer and
Advancement Act (NTTAA) and 1 CFR
part 51
K. Executive Order 12898: Federal Actions
To Address Environmental Justice in
Minority Populations and Low-Income
Populations
I. General Information
A. Does this action apply to me?
Table 1 of this preamble lists the
NESHAP and associated regulated
industrial source categories that are the
subject of this proposal. Table 1 is not
intended to be exhaustive, but rather
provides a guide for readers regarding
the entities that this proposed action is
likely to affect. The proposed standards,
once promulgated, will be directly
applicable to the affected sources. This
proposed action will not affect federal,
state, local, and tribal government
entities. The Initial List of Categories of
Sources Under Section 112(c)(1) of the
Clean Air Act Amendments of 1990 (see
57 FR 31576, July 16, 1992) and
Documentation for Developing the
Initial Source Category List, Final
Report (see EPA–450/3–91–030, July
1992) included separate source
categories for the various cellulose
products manufacturing industries. The
source categories on the initial list were
Cellulose Food Casings, Rayon,
Cellophane, Methyl Cellulose,
Carboxymethyl Cellulose, and Cellulose
Ethers Production. The Cellulose Ethers
Production source category on the
initial list included the hydroxyethyl
cellulose, hydroxypropyl cellulose, and
hydroxypropyl methyl cellulose
industries. In developing the original
proposed rule for Cellulose Products
Manufacturing, we identified another
cellulose products manufacturing
industry, Cellulosic Sponge
Manufacturing, that was not on the
initial source category list. We added
Cellulosic Sponge Manufacturing to the
source category list on November 18,
1999 (64 FR 63026) in accordance with
section 112(c) of the CAA. When the
EPA proposed the Cellulose Products
Manufacturing NESHAP on August 28,
2000 (65 FR 52166), the Cellulose Food
Casings, Rayon, Cellophane, and
Cellulosic Sponge Manufacturing source
categories were combined to create a
new source category called
‘‘Miscellaneous Viscose Processes.’’ At
the same time, we combined the Methyl
Cellulose, Carboxymethyl Cellulose, and
Cellulose Ethers Production source
categories to create a newly expanded
‘‘Cellulose Ethers Production’’ source
category. On February 12, 2002 (67 FR
6521), we published an updated source
category list that included the
Miscellaneous Viscose Processes (MVP)
and Cellulose Ethers Production (CEP)
source categories.
TABLE 1—NESHAP AND INDUSTRIAL SOURCE CATEGORIES AFFECTED BY THIS PROPOSED ACTION
NESHAP
Miscellaneous Viscose Processes .............
Cellulose Ethers Production .......................
Cellulose Products Manufacturing ............
Cellulose Products Manufacturing ............
1 North
325211, 325220, 326121, 326199.
325199.
American Industry Classification System.
II. Background
B. Where can I get a copy of this
document and other related
information?
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NAICS code 1
Source category
In addition to being available in the
docket, an electronic copy of this action
is available on the internet. Following
signature by the EPA Administrator, the
EPA will post a copy of this proposed
action at https://www.epa.gov/celluloseproducts-manufacturing-nationalemission-standards. Following
publication in the Federal Register, the
EPA will post the Federal Register
version of the proposal and key
technical documents at this same
website. Information on the overall RTR
program is available at https://
www3.epa.gov/ttn/atw/rrisk/rtrpg.html.
A redline version of the regulatory
language that incorporates the proposed
changes in this action is available in the
docket for this action (Docket ID No.
EPA–HQ–OAR–2018–0415).
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A. What is the statutory authority for
this action?
The statutory authority for this action
is provided by sections 112 and 301 of
the CAA, as amended (42 U.S.C. 7401 et
seq.). Section 112 of the CAA
establishes a two-stage regulatory
process to develop standards for
emissions of HAP from stationary
sources. Generally, the first stage
involves establishing technology-based
standards and the second stage involves
evaluating those standards that are
based on maximum achievable control
technology (MACT) to determine
whether additional standards are
needed to address any remaining risk
associated with HAP emissions. This
second stage is commonly referred to as
the ‘‘residual risk review.’’ In addition
to the residual risk review, the CAA also
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requires the EPA to review standards set
under CAA section 112 every 8 years to
determine if there are ‘‘developments in
practices, processes, or control
technologies’’ that may be appropriate
to incorporate into the standards. This
review is commonly referred to as the
‘‘technology review.’’ When the two
reviews are combined into a single
rulemaking, it is commonly referred to
as the ‘‘risk and technology review.’’
The discussion that follows identifies
the most relevant statutory sections and
briefly explains the contours of the
methodology used to implement these
statutory requirements. A more
comprehensive discussion appears in
the document titled CAA Section 112
Risk and Technology Reviews: Statutory
Authority and Methodology, in the
docket for this rulemaking.
In the first stage of the CAA section
112 standard setting process, the EPA
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promulgates technology-based standards
under CAA section 112(d) for categories
of sources identified as emitting one or
more of the HAP listed in CAA section
112(b). Sources of HAP emissions are
either major sources or area sources, and
CAA section 112 establishes different
requirements for major source standards
and area source standards. ‘‘Major
sources’’ are those that emit or have the
potential to emit 10 tons per year (tpy)
or more of a single HAP or 25 tpy or
more of any combination of HAP. All
other sources are ‘‘area sources.’’ For
major sources, CAA section 112(d)(2)
provides that the technology-based
NESHAP must reflect the maximum
degree of emission reductions of HAP
achievable (after considering cost,
energy requirements, and non-air
quality health and environmental
impacts). These standards are
commonly referred to as MACT
standards. CAA section 112(d)(3) also
establishes a minimum control level for
MACT standards, known as the MACT
‘‘floor.’’ The EPA must also consider
control options that are more stringent
than the floor. Standards more stringent
than the floor are commonly referred to
as beyond-the-floor standards. In certain
instances, as provided in CAA section
112(h), the EPA may set work practice
standards where it is not feasible to
prescribe or enforce a numerical
emission standard. For area sources,
CAA section 112(d)(5) gives the EPA
discretion to set standards based on
generally available control technologies
or management practices (GACT
standards) in lieu of MACT standards.
The second stage in standard-setting
focuses on identifying and addressing
any remaining (i.e., ‘‘residual’’) risk
according to CAA section 112(f). For
source categories subject to MACT
standards, section 112(f)(2) of the CAA
requires the EPA to determine whether
promulgation of additional standards is
needed to provide an ample margin of
safety to protect public health or to
prevent an adverse environmental
effect. Section 112(d)(5) of the CAA
provides that this residual risk review is
not required for categories of area
sources subject to GACT standards.
Section 112(f)(2)(B) of the CAA further
expressly preserves the EPA’s use of the
two-step approach for developing
standards to address any residual risk
and the Agency’s interpretation of
‘‘ample margin of safety’’ developed in
the National Emissions Standards for
Hazardous Air Pollutants: Benzene
Emissions from Maleic Anhydride
Plants, Ethylbenzene/Styrene Plants,
Benzene Storage Vessels, Benzene
Equipment Leaks, and Coke By-Product
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Recovery Plants (Benzene NESHAP) (54
FR 38044, September 14, 1989). The
EPA notified Congress in the Risk
Report that the Agency intended to use
the Benzene NESHAP approach in
making CAA section 112(f) residual risk
determinations (EPA–453/R–99–001, p.
ES–11). The EPA subsequently adopted
this approach in its residual risk
determinations and the United States
Court of Appeals for the District of
Columbia Circuit (the Court) upheld the
EPA’s interpretation that CAA section
112(f)(2) incorporates the approach
established in the Benzene NESHAP.
See NRDC v. EPA, 529 F.3d 1077, 1083
(DC Cir. 2008).
The approach incorporated into the
CAA and used by the EPA to evaluate
residual risk and to develop standards
under CAA section 112(f)(2) is a twostep approach. In the first step, the EPA
determines whether risks are acceptable.
This determination ‘‘considers all health
information, including risk estimation
uncertainty, and includes a presumptive
limit on maximum individual lifetime
[cancer] risk (MIR) 1 of approximately 1
in 10 thousand.’’ 54 FR 38045,
September 14, 1989. If risks are
unacceptable, the EPA must determine
the emissions standards necessary to
reduce risk to an acceptable level
without considering costs. In the second
step of the approach, the EPA considers
whether the emissions standards
provide an ample margin of safety to
protect public health ‘‘in consideration
of all health information, including the
number of persons at risk levels higher
than approximately 1 in 1 million, as
well as other relevant factors, including
costs and economic impacts,
technological feasibility, and other
factors relevant to each particular
decision.’’ Id. The EPA must promulgate
emission standards necessary to provide
an ample margin of safety to protect
public health or determine that the
standards being reviewed provide an
ample margin of safety without any
revisions. After conducting the ample
margin of safety analysis, we consider
whether a more stringent standard is
necessary to prevent, taking into
consideration costs, energy, safety, and
other relevant factors, an adverse
environmental effect.
CAA section 112(d)(6) separately
requires the EPA to review standards
promulgated under CAA section 112
and revise them ‘‘as necessary (taking
into account developments in practices,
processes, and control technologies)’’ no
1 Although defined as ‘‘maximum individual
risk,’’ MIR refers only to cancer risk. MIR, one
metric for assessing cancer risk, is the estimated
risk if an individual were exposed to the maximum
level of a pollutant for a lifetime.
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less often than every 8 years. In
conducting this review, which we call
the ‘‘technology review,’’ the EPA is not
required to recalculate the MACT floor.
Natural Resources Defense Council
(NRDC) v. EPA, 529 F.3d 1077, 1084
(D.C. Cir. 2008). Association of Battery
Recyclers, Inc. v. EPA, 716 F.3d 667
(D.C. Cir. 2013). The EPA may consider
cost in deciding whether to revise the
standards pursuant to CAA section
112(d)(6).
B. What is this source category and how
does the current NESHAP regulate its
HAP emissions?
The MVP source category includes
any facility engaged in the production of
cellulose food casings, rayon,
cellophane, or cellulosic sponges, which
includes the following process steps:
Production of alkali cellulose from
cellulose and sodium hydroxide
(NaOH); production of sodium cellulose
xanthate from alkali cellulose and
carbon disulfide (CS2) (xanthation);
production of viscose from sodium
cellulose xanthate and NaOH solution;
regeneration of liquid viscose into solid
cellulose; 2 and washing of the solid
cellulose product (see 65 FR 52171–2,
August 28, 2000). It should be noted
that, while the current Cellulose
Products Manufacturing NESHAP
includes standards for rayon
manufacturing, all rayon plants in the
United States have shut down since
promulgation of the original rule.
The CEP source category includes any
facility engaged in the production of
carboxymethyl cellulose (CMC),
hydroxyethyl cellulose (HEC),
hydroxypropyl cellulose (HPC), methyl
cellulose (MC), or hydroxypropyl
methyl cellulose (HPMC), which
includes the following process steps:
Production of alkali cellulose from
cellulose and NaOH; reaction of the
alkali cellulose with one or more
organic chemicals to produce a cellulose
ether product; 3 washing and
purification of the cellulose ether
product; and drying of the cellulose
ether product (see 65 FR 52171, August
28, 2000).
2 The MVP operations use different methods and
equipment to complete the regeneration step.
Cellulose food casing operations extrude viscose
through a die, forming a tube, while rayon
operations extrude viscose through spinnerets,
forming thin strands. Cellophane operations
extrude viscose through a long slit, forming a flat
sheet, while cellulosic sponge operations feed a
mixture of viscose and Glauber’s salt into a sponge
mold.
3 To produce CMC, HEC, HPC, MC, and HPMC,
alkali cellulose is reacted with chloroacetic acid,
ethylene oxide, propylene oxide, methyl chloride,
and a combination of methyl chloride and
propylene oxide, respectively.
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This proposal includes both a residual
risk assessment and a technology review
of the emission sources subject to the
Cellulose Products Manufacturing
NESHAP. The NESHAP requires MVP
operations to reduce the total sulfide
emissions from their process vents and
control the CS2 emissions from their CS2
unloading and storage operations. It also
requires cellophane operations to
reduce the toluene emissions from their
solvent coating operations and toluene
storage vessels. The NESHAP requires
CEP operations to control the HAP
emissions from their process vents,
wastewater, equipment leaks, and liquid
streams in open systems. The NESHAP
requires both MVP and CEP operations
to comply with work practice standards
for closed-vent systems and heat
exchanger systems. The NESHAP also
includes various operating limits, initial
and continuous compliance
requirements, and recordkeeping and
reporting requirements for the MVP and
CEP source categories.
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C. What data collection activities were
conducted to support this action?
On June 8, 2018, the EPA sent out a
survey to the cellulose products
manufacturing industry to gather
information needed to conduct the
regulatory reviews required under CAA
sections 112(d)(6) and 112(f)(2). The
EPA divided the survey into two parts.
Part 1 requested updated inventory data
for emission sources subject to 40 CFR
part 63, subpart UUUU, to support the
residual risk assessment for the two
source categories for purposes of
detailed residual risk modeling. Part 2
requested available information on
process equipment, control devices, and
other pertinent information to support
the 40 CFR part 63, subpart UUUU,
technology review. The response rate for
the survey was 100 percent. For more
details on the data collection conducted
to prepare inputs for the residual risk
assessment, see the memorandum titled
Preparation of the Residual Risk
Modeling Input File for Subpart UUUU,
in the docket for this rulemaking. For
more details on the data collection
conducted for the technology review,
see the memorandum titled Technology
Review for the Cellulose Products
Manufacturing Source Category—
Proposed Rule, also available in the
docket.
D. What other relevant background
information and data are available?
In addition to survey data provided by
the regulated facilities, the EPA
reviewed a number of other information
sources to determine if there have been
developments in practices, processes, or
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control technologies by cellulose
products manufacturing facilities to
support the technology review. These
information sources include:
• Emissions data (e.g., stack test
reports and continuous emissions
monitoring system (CEMS) data)
submitted with survey responses;
• Facility operating permits
submitted with survey responses and
collected from state agencies;
• Semiannual compliance reports
submitted with survey responses;
• Other documentation submitted
with survey responses (e.g., compliance
calculations; process flow diagrams;
Safety Data Sheets; information on
monitoring, wastewater, and equipment
leaks);
• Information on air pollution control
options utilized by the industry from
the EPA’s Reasonably Available Control
Technology/Best Available Control
Technology/Lowest Achievable
Emission Limits Clearinghouse (RBLC);
• Information on applicability and
compliance issues from the EPA’s
Applicability Determination Index
(ADI); and
• Literature review of recent
information on MVP and CEP practices,
processes, and control technologies.
III. Analytical Procedures and
Decision-Making
In this section, we describe the
analyses performed to support the
proposed decisions for the RTR and
other issues addressed in this proposal.
A. How do we consider risk in our
decision-making under CAA section
112(f)(2)?
As discussed in section II.A of this
preamble and in the Benzene NESHAP,
in evaluating and developing standards
under CAA section 112(f)(2), we apply
a two-step approach to determine
whether or not risks are acceptable and
to determine if the standards provide an
ample margin of safety to protect public
health. As explained in the Benzene
NESHAP, ‘‘the first step judgment on
acceptability cannot be reduced to any
single factor’’ and, thus, ‘‘[t]he
Administrator believes that the
acceptability of risk under section 112 is
best judged on the basis of a broad set
of health risk measures and
information.’’ 54 FR 38046, September
14, 1989. Similarly, with regard to the
ample margin of safety determination,
‘‘the Agency again considers all of the
health risk and other health information
considered in the first step. Beyond that
information, additional factors relating
to the appropriate level of control will
also be considered, including cost and
economic impacts of controls,
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technological feasibility, uncertainties,
and any other relevant factors.’’ Id.
The Benzene NESHAP approach
provides flexibility regarding factors the
EPA may consider in making
determinations and how the EPA may
weigh those factors for each source
category. The EPA conducts a risk
assessment that provides estimates of
the MIR posed by the HAP emissions
from each source in the source category,
the hazard index (HI) for chronic
exposures to HAP with the potential to
cause noncancer health effects, and the
hazard quotient (HQ) for acute
exposures to HAP with the potential to
cause noncancer health effects.4 The
assessment also provides estimates of
the distribution of cancer risk within the
exposed populations, cancer incidence,
and an evaluation of the potential for an
adverse environmental effect. The scope
of the EPA’s risk analysis is consistent
with the EPA’s response to comments
on our policy under the Benzene
NESHAP where the EPA explained that:
‘‘[t]he policy chosen by the Administrator
permits consideration of multiple measures
of health risk. Not only can the MIR figure
be considered, but also incidence, the
presence of non-cancer health effects, and the
uncertainties of the risk estimates. In this
way, the effect on the most exposed
individuals can be reviewed as well as the
impact on the general public. These factors
can then be weighed in each individual case.
This approach complies with the Vinyl
Chloride mandate that the Administrator
ascertain an acceptable level of risk to the
public by employing his expertise to assess
available data. It also complies with the
Congressional intent behind the CAA, which
did not exclude the use of any particular
measure of public health risk from the EPA’s
consideration with respect to CAA section
112 regulations, and thereby implicitly
permits consideration of any and all
measures of health risk which the
Administrator, in his judgment, believes are
appropriate to determining what will ‘protect
the public health’.’’
See 54 FR 38057, September 14, 1989.
Thus, the level of the MIR is only one
factor to be weighed in determining
acceptability of risk. The Benzene
NESHAP explained that ‘‘an MIR of
approximately one in 10 thousand
should ordinarily be the upper end of
the range of acceptability. As risks
increase above this benchmark, they
become presumptively less acceptable
under CAA section 112, and would be
weighed with the other health risk
measures and information in making an
4 The MIR is defined as the cancer risk associated
with a lifetime of exposure at the highest
concentration of HAP where people are likely to
live. The HQ is the ratio of the potential HAP
exposure concentration to the noncancer doseresponse value; the HI is the sum of HQs for HAP
that affect the same target organ or organ system.
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overall judgment on acceptability. Or,
the Agency may find, in a particular
case, that a risk that includes an MIR
less than the presumptively acceptable
level is unacceptable in the light of
other health risk factors.’’ Id. at 38045.
In other words, risks that include an
MIR above 100-in-1 million may be
determined to be acceptable, and risks
with an MIR below that level may be
determined to be unacceptable,
depending on all of the available health
information. Similarly, with regard to
the ample margin of safety analysis, the
EPA stated in the Benzene NESHAP
that: ‘‘EPA believes the relative weight
of the many factors that can be
considered in selecting an ample margin
of safety can only be determined for
each specific source category. This
occurs mainly because technological
and economic factors (along with the
health-related factors) vary from source
category to source category.’’ Id. at
38061. We also consider the
uncertainties associated with the
various risk analyses, as discussed
earlier in this preamble, in our
determinations of acceptability and
ample margin of safety.
The EPA notes that it has not
considered certain health information to
date in making residual risk
determinations. At this time, we do not
attempt to quantify the HAP risk that
may be associated with emissions from
other facilities that do not include the
source categories under review, mobile
source emissions, natural source
emissions, persistent environmental
pollution, or atmospheric
transformation in the vicinity of the
sources in the categories.
The EPA understands the potential
importance of considering an
individual’s total exposure to HAP in
addition to considering exposure to
HAP emissions from the source category
and facility. We recognize that such
consideration may be particularly
important when assessing noncancer
risk, where pollutant-specific exposure
health reference levels (e.g., reference
concentrations (RfCs)) are based on the
assumption that thresholds exist for
adverse health effects. For example, the
EPA recognizes that, although exposures
attributable to emissions from a source
category or facility alone may not
indicate the potential for increased risk
of adverse noncancer health effects in a
population, the exposures resulting
from emissions from the facility in
combination with emissions from all of
the other sources (e.g., other facilities) to
which an individual is exposed may be
sufficient to result in an increased risk
of adverse noncancer health effects. In
May 2010, the Science Advisory Board
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(SAB) advised the EPA ‘‘that RTR
assessments will be most useful to
decision makers and communities if
results are presented in the broader
context of aggregate and cumulative
risks, including background
concentrations and contributions from
other sources in the area.’’ 5
In response to the SAB
recommendations, the EPA incorporates
cumulative risk analyses into its RTR
risk assessments, including those
reflected in this proposal. The Agency
(1) conducts facility-wide assessments,
which include source category emission
points, as well as other emission points
within the facilities; (2) combines
exposures from multiple sources in the
same category that could affect the same
individuals; and (3) for some persistent
and bioaccumulative pollutants,
analyzes the ingestion route of
exposure. In addition, the RTR risk
assessments consider aggregate cancer
risk from all carcinogens and aggregated
noncancer HQs for all noncarcinogens
affecting the same target organ or target
organ system.
Although we are interested in placing
source category and facility-wide HAP
risk in the context of total HAP risk
from all sources combined in the
vicinity of each source, we are
concerned about the uncertainties of
doing so. Estimates of total HAP risk
from emission sources other than those
that we have studied in depth during
this RTR review would have
significantly greater associated
uncertainties than the source category or
facility-wide estimates. Such aggregate
or cumulative assessments would
compound those uncertainties, making
the assessments too unreliable.
B. How do we perform the technology
review?
Our technology review focuses on the
identification and evaluation of
developments in practices, processes,
and control technologies that have
occurred since the MACT standards
were promulgated. Where we identify
such developments, we analyze their
technical feasibility, estimated costs,
energy implications, and non-air
environmental impacts. We also
consider the emission reductions
associated with applying each
development. This analysis informs our
decision of whether it is ‘‘necessary’’ to
revise the emissions standards. In
addition, we consider the
5 Recommendations of the SAB Risk and
Technology Review Panel are provided in their
report, which is available at: https://
yosemite.epa.gov/sab/sabproduct.nsf/4AB3966
E263D943A8525771F00668381/$File/EPA-SAB-10007-unsigned.pdf.
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appropriateness of applying controls to
new sources versus retrofitting existing
sources. For this exercise, we consider
any of the following to be a
‘‘development’’:
• Any add-on control technology or
other equipment that was not identified
and considered during development of
the original MACT standards;
• Any improvements in add-on
control technology or other equipment
(that were identified and considered
during development of the original
MACT standards) that could result in
additional emissions reduction;
• Any work practice or operational
procedure that was not identified or
considered during development of the
original MACT standards;
• Any process change or pollution
prevention alternative that could be
broadly applied to the industry and that
was not identified or considered during
development of the original MACT
standards; and
• Any significant changes in the cost
(including cost effectiveness) of
applying controls (including controls
the EPA considered during the
development of the original MACT
standards).
In addition to reviewing the practices,
processes, and control technologies that
were considered at the time we
originally developed the NESHAP, we
review a variety of data sources in our
investigation of potential practices,
processes, or controls to consider. See
sections II.C and II.D of this preamble
for information on the specific data
sources that were reviewed as part of
the technology review.
C. How do we estimate post-MACT risk
posed by the source category?
In this section, we provide a complete
description of the types of analyses that
we generally perform during the risk
assessment process. In some cases, we
do not perform a specific analysis
because it is not relevant. For example,
in the absence of emissions of HAP
known to be persistent and
bioaccumulative in the environment
(PB–HAP), we would not perform a
multipathway exposure assessment.
Where we do not perform an analysis,
we state that we do not and provide the
reason. While we present all of our risk
assessment methods, we only present
risk assessment results for the analyses
actually conducted (see section IV.A of
this preamble).
The EPA conducts a risk assessment
that provides estimates of the MIR for
cancer posed by the HAP emissions
from each source in the source category,
the HI for chronic exposures to HAP
with the potential to cause noncancer
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health effects, and the HQ for acute
exposures to HAP with the potential to
cause noncancer health effects. The
assessment also provides estimates of
the distribution of cancer risk within the
exposed populations, cancer incidence,
and an evaluation of the potential for an
adverse environmental effect. The seven
sections that follow this paragraph
describe how we estimated emissions
and conducted the risk assessment. The
docket for this rulemaking contains the
following documents which provide
more information on the risk assessment
inputs and models: Residual Risk
Assessment for the Miscellaneous
Viscose Processes Source Category in
Support of the 2019 Risk and
Technology Review Proposed Rule and
Residual Risk Assessment for the
Cellulose Ethers Production Source
Category in Support of the 2019 Risk
and Technology Review Proposed Rule.
The methods used to assess risk (as
described in the eight primary steps
below) are consistent with those
described by the EPA in the document
reviewed by a panel of the EPA’s SAB
in 2009; 6 and described in the SAB
review report issued in 2010. They are
also consistent with the key
recommendations contained in that
report.
1. How did we estimate actual
emissions and identify the emissions
release characteristics?
As discussed in section II.C of this
preamble, we used data from Part 1 of
the 2018 survey as the basis for the risk
assessment for the MVP and CEP source
categories. Part 1 of the survey, which
concluded in August/September 2018,
targeted facilities that are major sources
of HAP emissions and involved an
update of pre-populated National
Emissions Inventory (NEI) data
spreadsheets (or creation of new
datasets). The NEI is a database that
contains information about sources that
emit criteria air pollutants, their
precursors, and HAP. The NEI database
includes estimates of actual annual air
pollutant emissions from point and
volume sources; emission release
characteristic data such as emission
release height, temperature, diameter,
velocity, and flow rate; and locational
latitude/longitude coordinates. We
asked facilities subject to the Cellulose
Products Manufacturing NESHAP to
refine (or create new) inventories based
6 U.S. EPA. Risk and Technology Review (RTR)
Risk Assessment Methodologies: For Review by the
EPA’s Science Advisory Board with Case Studies—
MACT I Petroleum Refining Sources and Portland
Cement Manufacturing, June 2009. EPA–452/R–09–
006. https://www3.epa.gov/airtoxics/rrisk/
rtrpg.html.
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on their NEI datasets for purposes of
detailed residual risk modeling.
Refinements included providing
additional details for HAP emission
sources, providing more specific
information on the location and
characteristics of emission points (e.g.,
updating emission release coordinates
and parameters), and adding or
updating HAP emissions data for each
emission release point. We compiled the
updated datasets for each individual
facility into MVP and CEP emissions
databases to create the MACT source
category residual risk modeling files.
The actual annual emissions data in
the emissions databases include data
from source tests, CEMS, material
balances, emission factors, emission
models, and engineering judgment
provided by sources surveyed in Part 1
of the survey. We received a
comprehensive set of emissions
estimates that enabled us to conduct
risk modeling of HAP emissions for all
major source facilities in the MVP and
CEP source categories.
We conducted substantial quality
assurance (QA) efforts on the Part 1 data
in order to create the modeling files
needed for the 40 CFR part 63, subpart
UUUU, residual risk assessment.7 We
first reviewed the Part 1 databases to
remove non-applicable data (e.g., data
marked for deletion by survey
respondents) unless we considered
them to be source-category data,
emission units identified as not subject
to the Cellulose Products Manufacturing
NESHAP, emission units identified as
shut down, records with non-HAP data,
and records with zero emissions. No
duplicate emissions data were
discovered during the QA.
We reviewed the databases to ensure
that each record contained a facility
identifier (ID), emission unit ID, and
process ID. If an ID was missing, one
was assigned using information
provided by industry (e.g., from EPA
databases, from emission unit
description or process description in the
NEI). In some cases, emission unit IDs
and process IDs were revised for
consistency. Looking across the updated
MVP and CEP inventories, we also
reviewed whether there may be any
referential integrity issues associated
with these IDs (e.g., having the same
emission unit ID associated with
multiple emission unit descriptions or
having the same process ID associated
with multiple process descriptions or
multiple source classification codes
7 These QA efforts are discussed in an April 15,
2019 memorandum in the docket titled Preparation
of the Residual Risk Modeling Input File for Subpart
UUUU.
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(SCCs)). In those cases, we revised the
appropriate ID to address the issue.
In addition, each record was checked
to ensure it was labeled with a
regulatory code, SCC, and emission
process group. No regulatory codes or
SCCs were found missing. The SCCs for
some records were revised for
consistency. Where information on
emission process group was missing, the
emission process group was determined
based on information from SCCs,
comments from survey respondents, etc.
Next, the SCCs and emission process
groups were compared and reviewed for
consistency with each other; no issues
were found.
We reviewed the pollutant codes in
the source category risk modeling files
to ensure the codes and descriptions
matched the latest code lookup table
used by the EPA for risk modeling files;
the review found the records to be
consistent.
We speciated data for chromium and
mercury using default speciation criteria
for those pollutants for the specific SCC.
We speciated chromium emissions as
hexavalent chromium (chromium VI)
and trivalent chromium (chromium III).
We speciated mercury emissions as
particulate divalent mercury, gaseous
divalent mercury, and gaseous
elemental mercury. We were unable to
speciate data for glycol ether for one
facility because no information on the
glycol ether compound(s) emitted was
available from the facility in their Part
1 survey response or operating permit.
For unspeciated emission inventories, it
is the EPA’s risk assessment policy to
use the most potent noncancer health
benchmark as the default emission
compound; in this case, ethylene glycol
methyl ether would be modeled.
We reviewed the emissions data by
calculating the percent of facilities
reporting each HAP, comparing
emissions of a facility to category
average emissions, calculating standard
deviations, and identifying outliers. No
pollutants in the MVP and CEP
modeling files were found above or
below the range for either category.
We reviewed the MVP and CEP risk
modeling files to ensure that each
record in these files contained an
emission release point ID. If an ID was
missing, one was assigned using
information provided by industry (e.g.,
from the emission unit ID or process ID).
In some cases, emission release point
IDs were revised for consistency.
Looking across the updated MVP and
CEP inventories, we also determined
whether there may be any referential
integrity issues associated with the
emission release information. For each
emission release point, each record
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should have one set of coordinates
(latitude and longitude) and one set of
stack or fugitive parameters. All records
were reviewed for consistency with
respect to the emission release point.
Where any such issues were identified,
we revised the emission release point
ID, stack/fugitive parameters, and/or
coordinates to address the issue.
We reviewed emission points labeled
as stacks to ensure no fugitive
parameters were identified; any fugitive
parameter values (usually zeroes)
entered for these records were deleted.
We reviewed stack parameters to ensure
all were populated with reasonable
values and made changes where
necessary. We checked stack height data
to ensure that they were greater than
stack diameter. We checked exit gas
flow rate data to determine whether
they met the EPA’s criteria that the flow
rate must be within 10 percent of the
calculated value (assuming a cylindrical
stack). Where exit gas flow rate values
did not meet the 10-percent criteria, we
conducted a review to determine the
source of the discrepancy (e.g., the
reported stack parameter was in the
wrong units). We also checked for
missing stack parameters and populated
the missing data using values from other
records for the same emission release
point; if values from other records were
not available, we calculated the missing
value based on other related parameters
for the same emission release point (e.g.,
calculated exit gas velocity using
available data for stack diameter and
exit gas flow rate).
We checked fugitive parameters to
ensure there was an associated length,
width, and angle, and that no stack
parameters for fugitive sources were
erroneously populated, other than the
required national defaults.
We checked coordinate values
(latitude and longitude) to determine if
there were any missing values and to
ensure only one set of coordinates
appeared for each emission release
point. We populated the missing data
using values from other records for the
same emission release point, where
possible. We revised coordinate values
where necessary to ensure coordinates
were consistent for the same emission
point. We also checked coordinate
values to ensure that all coordinates
were on the facility property, by
analyzing the distance between
coordinates at individual facilities. Only
one emission point, a wastewater
treatment system emission unit, was
found to be an outlier, and the
coordinates of this emission point were
checked and were found to lie on
wastewater tanks near the boundary of
the property.
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We checked the source category risk
modeling files for missing control
measure information and filled gaps
using control measure comments
provided by respondents in their Part 1
survey responses or process diagrams
provided by respondents in their Part 2
survey responses.
The emissions inventory for MVP
sources identifies no emissions of PB–
HAP. The emissions inventory for CEP
sources identifies emissions of the
following PB–HAP: Cadmium
compounds, arsenic compounds, lead
compounds, and mercury compounds.
Risk-based screening levels are available
for Tier 1 screening for all of the above
PB–HAP except lead compounds, which
are compared to the level of the current
National Ambient Air Quality Standard
(NAAQS) for lead.
Consistent with the EPA’s standard
practice in conducting risk assessments
for source categories, we conducted a
two-step process to determine: (1)
Whether PB–HAP are being emitted;
and (2) whether they are being released
above screening levels. If these releases
are significantly above the screening
levels and the EPA has detailed
information on the releases and the site,
a complete multipathway analysis of the
site is conducted to estimate pathway
risks for the source category.
We considered actual emissions of the
ecological HAP emitted from the CEP
source category in the ecological HAP
analysis. In addition to the PB–HAP
emitted from the CEP source category,
we considered hydrochloric acid (HCl)
and hydrogen fluoride (HF) for
ecological HAP modeling. The CEP
source category, however, does not emit
HF. Further information about the
multipathway analysis performed for
this category follows in section IV.A.2.c
of this preamble.
2. How did we estimate MACTallowable emissions?
The available emissions data in the
RTR emissions dataset include estimates
of the mass of HAP emitted during a
specified annual time period. These
‘‘actual’’ emission levels are often lower
than the emission levels allowed under
the requirements of the current MACT
standards. The emissions allowed under
the MACT standards are referred to as
the ‘‘MACT-allowable’’ emissions. We
discussed the consideration of both
MACT-allowable and actual emissions
in the final Coke Oven Batteries RTR (70
FR 19998–19999, April 15, 2005) and in
the proposed and final Hazardous
Organic NESHAP RTR (71 FR 34428,
June 14, 2006, and 71 FR 76609,
December 21, 2006, respectively). In
those actions, we noted that assessing
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the risk at the MACT-allowable level is
inherently reasonable since that risk
reflects the maximum level facilities
could emit and still comply with
national emission standards. We also
explained that it is reasonable to
consider actual emissions, where such
data are available, in both steps of the
risk analysis, in accordance with the
Benzene NESHAP approach. (54 FR
38044, September 14, 1989.)
Actual emissions are sometimes less
than allowable emissions due to a
compliance margin, a more stringent
state or local rule, or over-control due to
the use of control technologies,
equipment, or work practices that are
significantly better than that required to
meet 40 CFR part 63, subpart UUUU,
emission limits. Consequently, as part of
the Part 1 survey instructions, the EPA
requested that facilities provide MACTallowable emissions estimates.
Allowable emissions estimates were
available for four of the five MVP
facilities. Two MVP facilities provided
their allowable emissions in their Part 1
survey spreadsheet. Two other MVP
facilities provided their allowable
emissions separately, in their Part 1
survey response letter. The latter two
facilities stated that the stack parameters
would be expected to be different if they
were to emit at the allowable emissions
levels because additional ductwork and
ductwork modifications would be
expected in order to route additional
fumes to their biofilters if they increased
capacity. While we do not intend
MACT-allowable emissions in this risk
modeling effort to represent the
maximum potential-to-emit emission
rate, we conservatively used this
information for modeling because it was
the only readily available information.
We created new records in the MVP risk
modeling file to include just these
allowable emissions data and their
associated stack parameters. To avoid
any referential integrity issues, we
assigned a different emission release
point ID to these allowable emissions
records.
The remaining MVP facility did not
provide allowable emissions data in
their survey spreadsheet. However, this
facility is the only one in its
subcategory, so the original MACT for
the subcategory was based on their level
of control. Consequently, we assumed
that allowable emissions were equal to
the reported actual emissions. So, for
this facility, the allowable multiplier is
1.
There were some gaps in the
allowable emissions estimates provided
by the MVP facilities. Allowable
emissions for carbonyl sulfide (COS)
were not available for one MVP facility
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for one of their processes because they
report it as part of the hydrogen sulfide
(H2S) limit in their title V permit. We
created a new record in the MVP risk
modeling file that calculated the COS
allowable emissions for this process
using the same multiplier as H2S (6.8).
Allowable emissions for CS2 were also
not available for a second MVP facility
for some of their processes. We
calculated the allowable emissions for
this facility using the median of the
multipliers for those processes at the
facility that had allowable emissions
estimates. Using this approach, we
estimated the median allowable
multiplier for CS2 for this facility to be
approximately 2.4.
Allowable emissions estimates were
available for 48 percent of the records in
the CEP risk modeling file, and the
remaining 52 percent of records had no
allowable emissions estimates. Of that
52 percent of records, 33 percent were
uncontrolled sources of organic HAP,
and 19 percent were controlled sources
of organic HAP.
For uncontrolled CEP sources without
allowable emissions data (e.g., fugitive
emissions), we assumed that allowable
emissions were equal to their reported
actual emissions, since there is no
additional control beyond current
emissions. For controlled CEP sources
without allowable emissions data, we
reviewed Part 2 survey data on emission
controls for these sources and found
that all of these sources were already
meeting the 99-percent control required
under 40 CFR part 63, subpart UUUU,
and based on the data reported, there is
little if any additional control beyond
current emissions. Consequently,
allowable emissions are equal to actuals
for controlled CEP sources.
3. How do we conduct dispersion
modeling, determine inhalation
exposures, and estimate individual and
population inhalation risk?
Both long-term and short-term
inhalation exposure concentrations and
health risk from the source category
addressed in this proposal were
estimated using the Human Exposure
Model (HEM–3).8 The HEM–3 performs
three primary risk assessment activities:
(1) Conducting dispersion modeling to
estimate the concentrations of HAP in
ambient air, (2) estimating long-term
and short-term inhalation exposures to
individuals residing within 50
kilometers (km) of the modeled sources,
and (3) estimating individual and
population-level inhalation risk using
8 For more information about HEM–3, go to
https://www.epa.gov/fera/risk-assessment-andmodeling-human-exposure-model-hem.
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the exposure estimates and quantitative
dose-response information.
a. Dispersion Modeling
The air dispersion model AERMOD,
used by the HEM–3 model, is one of the
EPA’s preferred models for assessing air
pollutant concentrations from industrial
facilities.9 To perform the dispersion
modeling and to develop the
preliminary risk estimates, HEM–3
draws on three data libraries. The first
is a library of meteorological data,
which is used for dispersion
calculations. This library includes 1
year (2016) of hourly surface and upper
air observations from 824
meteorological stations, selected to
provide coverage of the United States
and Puerto Rico. A second library of
United States Census Bureau census
block 10 internal point locations and
populations provides the basis of
human exposure calculations (U.S.
Census, 2010). In addition, for each
census block, the census library
includes the elevation and controlling
hill height, which are also used in
dispersion calculations. A third library
of pollutant-specific dose-response
values is used to estimate health risk.
These are discussed below.
b. Risk From Chronic Exposure to HAP
In developing the risk assessment for
chronic exposures, we use the estimated
annual average ambient air
concentrations of each HAP emitted by
each source in the source category. The
HAP air concentrations at each nearby
census block centroid located within 50
km of the facility are a surrogate for the
chronic inhalation exposure
concentration for all the people who
reside in that census block. A distance
of 50 km is consistent with both the
analysis supporting the 1989 Benzene
NESHAP (54 FR 38044, September 14,
1989) and the limitations of Gaussian
dispersion models, including AERMOD.
For each facility, we calculate the MIR
as the cancer risk associated with a
continuous lifetime (24 hours per day,
7 days per week, 52 weeks per year, 70
years) exposure to the maximum
concentration at the centroid of each
inhabited census block. We calculate
individual cancer risk by multiplying
the estimated lifetime exposure to the
ambient concentration of each HAP (in
micrograms per cubic meter (mg/m3)) by
its unit risk estimate (URE). The URE is
9 U.S. EPA. Revision to the Guideline on Air
Quality Models: Adoption of a Preferred General
Purpose (Flat and Complex Terrain) Dispersion
Model and Other Revisions (70 FR 68218,
November 9, 2005).
10 A census block is the smallest geographic area
for which census statistics are tabulated.
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an upper-bound estimate of an
individual’s incremental risk of
contracting cancer over a lifetime of
exposure to a concentration of 1
microgram of the pollutant per cubic
meter of air. For residual risk
assessments, we generally use UREs
from the EPA’s Integrated Risk
Information System (IRIS). For
carcinogenic pollutants without IRIS
values, we look to other reputable
sources of cancer dose-response values,
often using California EPA (CalEPA)
UREs, where available. In cases where
new, scientifically credible doseresponse values have been developed in
a manner consistent with the EPA
guidelines and have undergone a peer
review process similar to that used by
the EPA, we may use such doseresponse values in place of, or in
addition to, other values, if appropriate.
The pollutant-specific dose-response
values used to estimate health risk are
available at https://www.epa.gov/fera/
dose-response-assessment-assessinghealth-risks-associated-exposurehazardous-air-pollutants.
To estimate individual lifetime cancer
risks associated with exposure to HAP
emissions from each facility in the
source category, we sum the risks for
each of the carcinogenic HAP 11 emitted
by the modeled facility. We estimate
cancer risk at every census block within
50 km of every facility in the source
category. The MIR is the highest
individual lifetime cancer risk estimated
for any of those census blocks. In
addition to calculating the MIR, we
estimate the distribution of individual
cancer risks for the source category by
summing the number of individuals
within 50 km of the sources whose
estimated risk falls within a specified
risk range. We also estimate annual
11 The EPA’s 2005 Guidelines for Carcinogen Risk
Assessment classifies carcinogens as: ‘‘carcinogenic
to humans,’’ ‘‘likely to be carcinogenic to humans,’’
and ‘‘suggestive evidence of carcinogenic
potential.’’ These classifications also coincide with
the terms ‘‘known carcinogen, probable carcinogen,
and possible carcinogen,’’ respectively, which are
the terms advocated in the EPA’s Guidelines for
Carcinogen Risk Assessment, published in 1986 (51
FR 33992, September 24, 1986). In August 2000, the
document, Supplemental Guidance for Conducting
Health Risk Assessment of Chemical Mixtures
(EPA/630/R–00/002), was published as a
supplement to the 1986 document. Copies of both
documents can be obtained from https://
cfpub.epa.gov/ncea/risk/recordisplay.cfm?deid=
20533&CFID=70315376&CFTOKEN=71597944.
Summing the risk of these individual compounds
to obtain the cumulative cancer risk is an approach
that was recommended by the EPA’s SAB in their
2002 peer review of the EPA’s National Air Toxics
Assessment (NATA) titled NATA—Evaluating the
National-scale Air Toxics Assessment 1996 Data—
an SAB Advisory, available at https://
yosemite.epa.gov/sab/sabproduct.nsf/214C6E915
BB04E14852570CA007A682C/$File/
ecadv02001.pdf.
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cancer incidence by multiplying the
estimated lifetime cancer risk at each
census block by the number of people
residing in that block, summing results
for all of the census blocks, and then
dividing this result by a 70-year
lifetime.
To assess the risk of noncancer health
effects from chronic exposure to HAP,
we calculate either an HQ or a target
organ-specific hazard index (TOSHI).
We calculate an HQ when a single
noncancer HAP is emitted. Where more
than one noncancer HAP is emitted, we
sum the HQ for each of the HAP that
affects a common target organ or target
organ system to obtain a TOSHI. The
HQ is the estimated exposure divided
by the chronic noncancer dose-response
value, which is a value selected from
one of several sources. The preferred
chronic noncancer dose-response value
is the EPA RfC, defined as ‘‘an estimate
(with uncertainty spanning perhaps an
order of magnitude) of a continuous
inhalation exposure to the human
population (including sensitive
subgroups) that is likely to be without
an appreciable risk of deleterious effects
during a lifetime’’ (https://
iaspub.epa.gov/sor_internet/registry/
termreg/searchandretrieve/
glossariesandkeywordlists/
search.do?details=&vocabName=
IRIS%20Glossary). In cases where an
RfC from the EPA’s IRIS is not available
or where the EPA determines that using
a value other than the RfC is
appropriate, the chronic noncancer
dose-response value can be a value from
the following prioritized sources, which
define their dose-response values
similarly to the EPA: (1) The Agency for
Toxic Substances and Disease Registry
(ATSDR) Minimum Risk Level (https://
www.atsdr.cdc.gov/mrls/index.asp); (2)
the CalEPA Chronic Reference Exposure
Level (REL) (https://oehha.ca.gov/air/
crnr/notice-adoption-air-toxics-hotspots-program-guidance-manualpreparation-health-risk-0); or (3) as
noted above, a scientifically credible
dose-response value that has been
developed in a manner consistent with
the EPA guidelines and has undergone
a peer review process similar to that
used by the EPA. The pollutant-specific
dose-response values used to estimate
health risks are available at https://
www.epa.gov/fera/dose-responseassessment-assessing-health-risksassociated-exposure-hazardous-airpollutants.
c. Risk From Acute Exposure to HAP
That May Cause Health Effects Other
Than Cancer
For each HAP for which appropriate
acute inhalation dose-response values
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are available, the EPA also assesses the
potential health risks due to acute
exposure. For these assessments, the
EPA makes conservative assumptions
about emission rates, meteorology, and
exposure location. In this proposed
rulemaking, as part of our efforts to
continually improve our methodologies
to evaluate the risks that HAP emitted
from categories of industrial sources
pose to human health and the
environment,12 we are revising our
treatment of meteorological data to use
reasonable worst-case air dispersion
conditions in our acute risk screening
assessments instead of worst-case air
dispersion conditions. This revised
treatment of meteorological data and the
supporting rationale are described in
more detail in the Residual Risk
Assessment for the Miscellaneous
Viscose Processes Source Category in
Support of the 2019 Risk and
Technology Review Proposed Rule and
in the Residual Risk Assessment for the
Cellulose Ethers Production Source
Category in Support of the 2019 Risk
and Technology Review Proposed Rule
and in Appendix 5 of both reports:
Technical Support Document for Acute
Risk Screening Assessment. We will be
applying this revision in RTR
rulemakings proposed on or after June 3,
2019.
To assess the potential acute risk to
the maximally exposed individual, we
use the peak hourly emission rate for
each emission point,13 reasonable
worst-case air dispersion conditions
(i.e., 99th percentile), and the point of
highest off-site exposure. Specifically,
we assume that peak emissions from the
source category and reasonable worstcase air dispersion conditions co-occur
and that a person is present at the point
of maximum exposure.
To characterize the potential health
risks associated with estimated acute
inhalation exposures to a HAP, we
generally use multiple acute doseresponse values, including acute RELs,
acute exposure guideline levels
12 See, e.g., U.S. EPA. Screening Methodologies to
Support Risk and Technology Reviews (RTR): A
Case Study Analysis (Draft Report, May 2017.
https://www3.epa.gov/ttn/atw/rrisk/rtrpg.html).
13 In the absence of hourly emission data, we
develop estimates of maximum hourly emission
rates by multiplying the average actual annual
emissions rates by a factor (either a categoryspecific factor or a default factor of 10) to account
for variability. This is documented in Residual Risk
Assessment for the Miscellaneous Viscose Processes
Source Category in Support of the 2019 Risk and
Technology Review Proposed Rule, Residual Risk
Assessment for the Cellulose Ethers Production
Source Category in Support of the 2019 Risk and
Technology Review Proposed Rule, and in
Appendix 5 of the reports: Technical Support
Document for Acute Risk Screening Assessment,
both are available in the docket for this rulemaking.
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(AEGLs), and emergency response
planning guidelines (ERPG) for 1-hour
exposure durations), if available, to
calculate acute HQs. The acute HQ is
calculated by dividing the estimated
acute exposure concentration by the
acute dose-response value. For each
HAP for which acute dose-response
values are available, the EPA calculates
acute HQs.
An acute REL is defined as ‘‘the
concentration level at or below which
no adverse health effects are anticipated
for a specified exposure duration.’’ 14
Acute RELs are based on the most
sensitive, relevant, adverse health effect
reported in the peer-reviewed medical
and toxicological literature. They are
designed to protect the most sensitive
individuals in the population through
the inclusion of margins of safety.
Because margins of safety are
incorporated to address data gaps and
uncertainties, exceeding the REL does
not automatically indicate an adverse
health impact. AEGLs repr esent
threshold exposure limits for the general
public and are applicable to emergency
exposures ranging from 10 minutes to 8
hours.15 They are guideline levels for
‘‘once-in-a-lifetime, short-term
exposures to airborne concentrations of
acutely toxic, high-priority chemicals.’’
Id. at 21. The AEGL–1 is specifically
defined as ‘‘the airborne concentration
(expressed as ppm (parts per million) or
mg/m3 (milligrams per cubic meter)) of
a substance above which it is predicted
that the general population, including
susceptible individuals, could
experience notable discomfort,
irritation, or certain asymptomatic
nonsensory effects. However, the effects
are not disabling and are transient and
reversible upon cessation of exposure.’’
The document also notes that ‘‘Airborne
concentrations below AEGL–1 represent
exposure levels that can produce mild
and progressively increasing but
transient and nondisabling odor, taste,
and sensory irritation or certain
14 CalEPA issues acute RELs as part of its Air
Toxics Hot Spots Program, and the 1-hour and 8hour values are documented in Air Toxics Hot
Spots Program Risk Assessment Guidelines, Part I,
The Determination of Acute Reference Exposure
Levels for Airborne Toxicants, which is available at
https://oehha.ca.gov/air/general-info/oehha-acute8-hour-and-chronic-reference-exposure-level-relsummary.
15 National Academy of Sciences, 2001. Standing
Operating Procedures for Developing Acute
Exposure Levels for Hazardous Chemicals, page 2.
Available at https://www.epa.gov/sites/production/
files/2015-09/documents/sop_final_standing_
operating_procedures_2001.pdf. Note that the
National Advisory Committee for Acute Exposure
Guideline Levels for Hazardous Substances ended
in October 2011, but the AEGL program continues
to operate at the EPA and works with the National
Academies to publish final AEGLs (https://
www.epa.gov/aegl).
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asymptomatic, nonsensory effects.’’ Id.
AEGL–2 are defined as ‘‘the airborne
concentration (expressed as parts per
million or milligrams per cubic meter)
of a substance above which it is
predicted that the general population,
including susceptible individuals, could
experience irreversible or other serious,
long-lasting adverse health effects or an
impaired ability to escape.’’ Id.
ERPGs are ‘‘developed for emergency
planning and are intended as healthbased guideline concentrations for
single exposures to chemicals.’’ 16 Id. at
1. The ERPG–1 is defined as ‘‘the
maximum airborne concentration below
which it is believed that nearly all
individuals could be exposed for up to
1 hour without experiencing other than
mild transient adverse health effects or
without perceiving a clearly defined,
objectionable odor.’’ Id. at 2. Similarly,
the ERPG–2 is defined as ‘‘the
maximum airborne concentration below
which it is believed that nearly all
individuals could be exposed for up to
one hour without experiencing or
developing irreversible or other serious
health effects or symptoms which could
impair an individual’s ability to take
protective action.’’ Id. at 1.
An acute REL for 1-hour exposure
durations is typically lower than its
corresponding AEGL–1 and ERPG–1.
Even though their definitions are
slightly different, AEGL–1s are often the
same as the corresponding ERPG–1s,
and AEGL–2s are often equal to ERPG–
2s. The maximum HQs from our acute
inhalation screening risk assessment
typically result when we use the acute
REL for a HAP. In cases where the
maximum acute HQ exceeds 1, we also
report the HQ based on the next highest
acute dose-response value (usually the
AEGL–1 and/or the ERPG–1).
As part of the Part 1 survey
instructions, the EPA requested that
facilities provide acute emissions
estimates. For the MVP source category,
acute emissions estimates were
available for four of the five facilities.
One of the four facilities was missing an
acute emission estimate for COS for one
process, but we were able to calculate
an estimate for COS by applying the
same acute multiplier for CS2 for the
same process at this facility. We
developed separate acute multipliers for
MVP process operations and MVP
16 ERPGS Procedures and Responsibilities. March
2014. American Industrial Hygiene Association.
Available at: https://www.aiha.org/get-involved/
AIHAGuidelineFoundation/EmergencyResponse
PlanningGuidelines/Documents/ERPG%20
Committee%20Standard%20Operating%20
Procedures%20%20-%20March%202014
%20Revision%20%28Updated%2010-22014%29.pdf.
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storage tanks to estimate acute
emissions for the fifth facility. We
estimated the average acute multipliers
for MVP process operations and MVP
storage tanks to be approximately 1.9
and 1.1, respectively.
For the CEP source category, acute
emissions estimates were available for
38 percent of the records in the CEP risk
modeling file. The remaining 62 percent
of records had no acute emissions
estimates. For CEP sources without
acute emissions data, we reviewed
permits and extracted maximum hourly
rate data if available, and assumed the
acute multiplier would be 10 if no data
were available.
A further discussion of why these
factors were chosen can be found in the
memorandum, Preparation of the
Residual Risk Modeling Input File for
Subpart UUUU, available in the docket
for this rulemaking.
In our acute inhalation screening risk
assessment, acute impacts are deemed
negligible for HAP for which acute HQs
are less than or equal to 1, and no
further analysis is performed for these
HAP. This was the case for the CEP
source category. In cases where an acute
HQ from the screening step is greater
than 1, we assess the site-specific data
to ensure that the acute HQ is at an offsite location. This was required for the
MVP source category, in which the data
refinements employed consisted of
ensuring that the locations where the
maximum HQ occurred were off facility
property and where the public could
potentially be exposed. These
refinements are discussed more fully in
the Residual Risk Assessment for the
Miscellaneous Viscose Processes Source
Category in Support of the 2019 Risk
and Technology Review Proposed Rule
which is available in the docket for this
source category.
4. How do we conduct the
multipathway exposure and risk
screening assessment?
The EPA conducts a tiered screening
assessment examining the potential for
significant human health risks due to
exposures via routes other than
inhalation (i.e., ingestion). We first
determine whether any sources in the
source categories emit any HAP known
to be persistent and bioaccumulative in
the environment, as identified in the
EPA’s Air Toxics Risk Assessment
Library (see Volume 1, Appendix D, at
https://www.epa.gov/fera/riskassessment-and-modeling-air-toxicsrisk-assessment-reference-library).
For the MVP source category, we did
not identify emissions of any PB–HAP
or lead compounds. Because we did not
identify PB–HAP emissions, no further
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evaluation of multipathway risk was
conducted for this source category.
For the CEP source category, we
identified PB–HAP emissions of
cadmium compounds, arsenic
compounds, lead compounds, and
mercury compounds, so we proceeded
to the next step of the evaluation.
Except for lead, the human health risk
screening assessment for PB–HAP
consists of three progressive tiers. In a
Tier 1 screening assessment, we
determine whether the magnitude of the
facility-specific emissions of PB–HAP
warrants further evaluation to
characterize human health risk through
ingestion exposure. To facilitate this
step, we evaluate emissions against
previously developed screening
threshold emission rates for several PB–
HAP that are based on a hypothetical
upper-end screening exposure scenario
developed for use in conjunction with
the EPA’s Total Risk Integrated
Methodology.Fate, Transport, and
Ecological Exposure (TRIM.FaTE)
model. The PB–HAP with screening
threshold emission rates are arsenic
compounds, cadmium compounds,
chlorinated dibenzodioxins and furans,
mercury compounds, and polycyclic
organic matter (POM). Based on the EPA
estimates of toxicity and
bioaccumulation potential, these
pollutants represent a conservative list
for inclusion in multipathway risk
assessments for RTR rules. (See Volume
1, Appendix D at https://www.epa.gov/
sites/production/files/2013-08/
documents/volume_1_reflibrary.pdf.) In
this assessment, we compare the
facility-specific emission rates of these
PB–HAP to the screening threshold
emission rates for each PB–HAP to
assess the potential for significant
human health risks via the ingestion
pathway. We call this application of the
TRIM.FaTE model the Tier 1 screening
assessment. The ratio of a facility’s
actual emission rate to the Tier 1
screening threshold emission rate is a
‘‘screening value.’’
We derive the Tier 1 screening
threshold emission rates for these PB–
HAP (other than lead compounds) to
correspond to a maximum excess
lifetime cancer risk of 1-in-1 million
(i.e., for arsenic compounds,
polychlorinated dibenzodioxins and
furans and POM) or, for HAP that cause
noncancer health effects (i.e., cadmium
compounds and mercury compounds), a
maximum HQ of 1. If the emission rate
of any one PB–HAP or combination of
carcinogenic PB–HAP in the Tier 1
screening assessment exceeds the Tier 1
screening threshold emission rate for
any facility (i.e., the screening value is
greater than 1), we conduct a second
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screening assessment, which we call the
Tier 2 screening assessment. The Tier 2
screening assessment separates the Tier
1 combined fisher and farmer exposure
scenario into fisher, farmer, and
gardener scenarios that retain upperbound ingestion rates.
In the Tier 2 screening assessment,
the location of each facility that exceeds
a Tier 1 screening threshold emission
rate is used to refine the assumptions
associated with the Tier 1 fisher and
farmer exposure scenarios at that
facility. A key assumption in the Tier 1
screening assessment is that a lake and/
or farm is located near the facility. As
part of the Tier 2 screening assessment,
we use a U.S. Geological Survey (USGS)
database to identify actual waterbodies
within 50 km of each facility and
assume the fisher only consumes fish
from lakes within that 50 km zone. We
also examine the differences between
local meteorology near the facility and
the meteorology used in the Tier 1
screening assessment. We then adjust
the previously-developed Tier 1
screening threshold emission rates for
each PB–HAP for each facility based on
an understanding of how exposure
concentrations estimated for the
screening scenario change with the use
of local meteorology and USGS lakes
database.
In the Tier 2 farmer scenario, we
maintain an assumption that the farm is
located within 0.5 km of the facility and
that the farmer consumes meat, eggs,
dairy, vegetables, and fruit produced
near the facility. We may further refine
the Tier 2 screening analysis by
assessing a gardener scenario to
characterize a range of exposures, with
the gardener scenario being more
plausible in RTR evaluations. Under the
gardener scenario, we assume the
gardener consumes home-produced
eggs, vegetables, and fruit products at
the same ingestion rate as the farmer.
The Tier 2 screen continues to rely on
the high-end food intake assumptions
that were applied in Tier 1 for local fish
(adult female angler at 99th percentile
fish consumption of fish 17) and locally
grown or raised foods (90th percentile
consumption of locally grown or raised
foods for the farmer and gardener
scenarios 18). If PB–HAP emission rates
do not result in a Tier 2 screening value
greater than 1, we consider those PB–
HAP emissions to pose risks below a
17 Burger, J. 2002. Daily consumption of wild fish
and game: Exposures of high end recreationists.
International Journal of Environmental Health
Research 12:343–354.
18 U.S. EPA. Exposure Factors Handbook 2011
Edition (Final). U.S. Environmental Protection
Agency, Washington, DC, EPA/600/R–09/052F,
2011.
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level of concern. If the PB–HAP
emission rates for a facility exceed the
Tier 2 screening threshold emission
rates, we may conduct a Tier 3
screening assessment.
There are several analyses that can be
included in a Tier 3 screening
assessment, depending upon the extent
of refinement warranted, including
validating that the lakes are fishable,
locating residential/garden locations for
urban and/or rural settings, considering
plume-rise to estimate emissions lost
above the mixing layer, and considering
hourly effects of meteorology and plume
rise on chemical fate and transport (a
time-series analysis). If necessary, the
EPA may further refine the screening
assessment through a site-specific
assessment.
In evaluating the potential
multipathway risk from emissions of
lead compounds, rather than developing
a screening threshold emission rate, we
compare maximum estimated chronic
inhalation exposure concentrations to
the level of the current National
Ambient Air Quality Standard (NAAQS)
for lead.19 Values below the level of the
primary (health-based) lead NAAQS are
considered to have a low potential for
multipathway risk.
For further information on the
multipathway assessment for CEP, see
the Residual Risk Assessment for the
Cellulose Ethers Production Source
Category in Support of the Risk and
Technology Review 2019 Proposed Rule,
which is available in the docket for this
action.
5. How do we conduct the
environmental risk screening
assessment?
a. Adverse Environmental Effect,
Environmental HAP, and Ecological
Benchmarks
The EPA conducts a screening
assessment to examine the potential for
an adverse environmental effect as
required under section 112(f)(2)(A) of
the CAA. Section 112(a)(7) of the CAA
defines ‘‘adverse environmental effect’’
19 In doing so, the EPA notes that the legal
standard for a primary NAAQS—that a standard is
requisite to protect public health and provide an
adequate margin of safety (CAA section 109(b))—
differs from the CAA section 112(f) standard
(requiring, among other things, that the standard
provide an ‘‘ample margin of safety to protect
public health’’). However, the primary lead NAAQS
is a reasonable measure of determining risk
acceptability (i.e., the first step of the Benzene
NESHAP analysis) since it is designed to protect the
most susceptible group in the human population—
children, including children living near major lead
emitting sources. 73 FR 67002/3; 73 FR 67000/3; 73
FR 67005/1. In addition, applying the level of the
primary lead NAAQS at the risk acceptability step
is conservative, since that primary lead NAAQS
reflects an adequate margin of safety.
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as ‘‘any significant and widespread
adverse effect, which may reasonably be
anticipated, to wildlife, aquatic life, or
other natural resources, including
adverse impacts on populations of
endangered or threatened species or
significant degradation of
environmental quality over broad
areas.’’
The EPA focuses on eight HAP, which
are referred to as ‘‘environmental HAP,’’
in its screening assessment: Six PB–
HAP and two acid gases. The PB–HAP
included in the screening assessment
are arsenic compounds, cadmium
compounds, dioxins/furans, POM,
mercury (both inorganic mercury and
methyl mercury), and lead compounds.
The acid gases included in the screening
assessment are HCl and HF.
HAP that persist and bioaccumulate
are of particular environmental concern
because they accumulate in the soil,
sediment, and water. The acid gases,
HCl and HF, are included due to their
well-documented potential to cause
direct damage to terrestrial plants. In the
environmental risk screening
assessment, we evaluate the following
four exposure media: Terrestrial soils,
surface water bodies (includes watercolumn and benthic sediments), fish
consumed by wildlife, and air. Within
these four exposure media, we evaluate
nine ecological assessment endpoints,
which are defined by the ecological
entity and its attributes. For PB–HAP
(other than lead), both community-level
and population-level endpoints are
included. For acid gases, the ecological
assessment evaluated is terrestrial plant
communities.
An ecological benchmark represents a
concentration of HAP that has been
linked to a particular environmental
effect level. For each environmental
HAP, we identified the available
ecological benchmarks for each
assessment endpoint. We identified,
where possible, ecological benchmarks
at the following effect levels: Probable
effect levels, lowest-observed-adverseeffect level, and no-observed-adverseeffect level. In cases where multiple
effect levels were available for a
particular PB–HAP and assessment
endpoint, we use all of the available
effect levels to help us to determine
whether ecological risks exist and, if so,
whether the risks could be considered
significant and widespread.
For further information on how the
environmental risk screening
assessment was conducted, including a
discussion of the risk metrics used, how
the environmental HAP were identified,
and how the ecological benchmarks
were selected, see Appendix 9 of the
Residual Risk Assessment for the
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Cellulose Ethers Production Source
Category in Support of the Risk and
Technology Review 2019 Proposed Rule,
which is available in the docket for this
action.
b. Environmental Risk Screening
Methodology
For the environmental risk screening
assessment, the EPA first determined
whether any facilities in the MVP and
CEP source categories emitted any of the
environmental HAP. For the CEP source
category, we identified emissions of
cadmium compounds, arsenic
compounds, lead compounds, mercury
compounds, and HCl. Because one or
more of the environmental HAP
evaluated are emitted by at least one
facility in the source category, we
proceeded to the second step of the
evaluation. For the MVP source
category, we did not identify emissions
of any of the eight environmental HAP
included in the screen. Because we did
not identify environmental HAP
emissions from the MVP source
category, no further evaluation of
environmental risk was conducted for
that category.
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c. PB–HAP Methodology
The environmental screening
assessment includes six PB–HAP,
arsenic compounds, cadmium
compounds, dioxins/furans, POM,
mercury (both inorganic mercury and
methyl mercury), and lead compounds.
With the exception of lead, the
environmental risk screening
assessment for PB–HAP consists of three
tiers. The first tier of the environmental
risk screening assessment uses the same
health-protective conceptual model that
is used for the Tier 1 human health
screening assessment. TRIM.FaTE
model simulations were used to backcalculate Tier 1 screening threshold
emission rates. The screening threshold
emission rates represent the emission
rate in tons of pollutant per year that
results in media concentrations at the
facility that equal the relevant ecological
benchmark. To assess emissions from
each facility in the category, the
reported emission rate for each PB–HAP
was compared to the Tier 1 screening
threshold emission rate for that PB–HAP
for each assessment endpoint and effect
level. If emissions from a facility do not
exceed the Tier 1 screening threshold
emission rate, the facility ‘‘passes’’ the
screening assessment, and, therefore, is
not evaluated further under the
screening approach. If emissions from a
facility exceed the Tier 1 screening
threshold emission rate, we evaluate the
facility further in Tier 2.
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In Tier 2 of the environmental
screening assessment, the screening
threshold emission rates are adjusted to
account for local meteorology and the
actual location of lakes in the vicinity of
facilities that did not pass the Tier 1
screening assessment. For soils, we
evaluate the average soil concentration
for all soil parcels within a 7.5-km
radius for each facility and PB–HAP.
For the water, sediment, and fish tissue
concentrations, the highest value for
each facility for each pollutant is used.
If emission concentrations from a
facility do not exceed the Tier 2
screening threshold emission rate, the
facility ‘‘passes’’ the screening
assessment and typically is not
evaluated further. If emissions from a
facility exceed the Tier 2 screening
threshold emission rate, we evaluate the
facility further in Tier 3.
As in the multipathway human health
risk assessment, in Tier 3 of the
environmental screening assessment, we
examine the suitability of the lakes
around the facilities to support life and
remove those that are not suitable (e.g.,
lakes that have been filled in or are
industrial ponds), adjust emissions for
plume-rise, and conduct hour-by-hour
time-series assessments. If these Tier 3
adjustments to the screening threshold
emission rates still indicate the
potential for an adverse environmental
effect (i.e., facility emission rate exceeds
the screening threshold emission rate),
we may elect to conduct a more refined
assessment using more site-specific
information. If, after additional
refinement, the facility emission rate
still exceeds the screening threshold
emission rate, the facility may have the
potential to cause an adverse
environmental effect.
To evaluate the potential for an
adverse environmental effect from lead,
we compared the average modeled air
concentrations (from HEM–3) of lead
around each facility in the source
category to the level of the secondary
NAAQS for lead. The secondary lead
NAAQS is a reasonable means of
evaluating environmental risk because it
is set to provide substantial protection
against adverse welfare effects which
can include ‘‘effects on soils, water,
crops, vegetation, man-made materials,
animals, wildlife, weather, visibility and
climate, damage to and deterioration of
property, and hazards to transportation,
as well as effects on economic values
and on personal comfort and wellbeing.’’
d. Acid Gas Environmental Risk
Methodology
The environmental screening
assessment for acid gases evaluates the
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potential phytotoxicity and reduced
productivity of plants due to chronic
exposure to HF and HCl. The
environmental risk screening
methodology for acid gases is a singletier screening assessment that compares
modeled ambient air concentrations
(from AERMOD) to the ecological
benchmarks for each acid gas. To
identify a potential adverse
environmental effect (as defined in
section 112(a)(7) of the CAA) from
emissions of HF and HCl, we evaluate
the following metrics: The size of the
modeled area around each facility that
exceeds the ecological benchmark for
each acid gas, in acres and square
kilometers (km2); the percentage of the
modeled area around each facility that
exceeds the ecological benchmark for
each acid gas; and the area-weighted
average screening value around each
facility (calculated by dividing the areaweighted average concentration over the
50-km modeling domain by the
ecological benchmark for each acid gas).
For further information on the
environmental screening assessment
approach, see Appendix 9 of the
Residual Risk Assessment for the
Cellulose Ethers Production Source
Category in Support of the Risk and
Technology Review 2019 Proposed Rule,
which is available in the docket for this
action.
6. How do we conduct facility-wide
assessments?
To put the source category risks in
context, we typically examine the risks
from the entire ‘‘facility,’’ where the
facility includes all HAP-emitting
operations within a contiguous area and
under common control. In other words,
we examine the HAP emissions not only
from the source category emission
points of interest, but also emissions of
HAP from all other emission sources at
the facility for which we have data. For
this source category, we conducted the
facility-wide assessment using a dataset
compiled from the 2014 NEI. The source
category records of that NEI dataset
were removed, evaluated, and updated
as described in section II.C of this
preamble: What data collection
activities were conducted to support
this action? Once a quality assured
source category dataset was available, it
was placed back with the remaining
records from the NEI for that facility.
The facility-wide file was then used to
analyze risks due to the inhalation of
HAP that are emitted ‘‘facility-wide’’ for
the populations residing within 50 km
of each facility, consistent with the
methods used for the source category
analysis described above. For these
facility-wide risk analyses, the modeled
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source category risks were compared to
the facility-wide risks to determine the
portion of the facility-wide risks that
could be attributed to the source
category addressed in this proposal. We
also specifically examined the facility
that was associated with the highest
estimate of risk and determined the
percentage of that risk attributable to the
source category of interest. The Residual
Risk Assessment for the Miscellaneous
Viscose Processes Source Category in
Support of the Risk and Technology
Review 2019 Proposed Rule and the
Residual Risk Assessment for the
Cellulose Ethers Production Source
Category in Support of the Risk and
Technology Review 2019 Proposed Rule,
available through the docket for this
action, provides the methodology and
results of the facility-wide analyses,
including all facility-wide risks and the
percentage of source category
contribution to facility-wide risks.
a. Uncertainties in the RTR Emissions
Datasets
7. How do we consider uncertainties in
risk assessment?
b. Uncertainties in Dispersion Modeling
Uncertainty and the potential for bias
are inherent in all risk assessments,
including those performed for this
proposal. Although uncertainty exists,
we believe that our approach, which
used conservative tools and
assumptions, ensures that our decisions
are health and environmentally
protective. A brief discussion of the
uncertainties in the RTR emissions
datasets, dispersion modeling,
inhalation exposure estimates, and
dose-response relationships follows
below. Also included are those
uncertainties specific to our acute
screening assessments, multipathway
screening assessments, and our
environmental risk screening
assessments. A more thorough
discussion of these uncertainties is
included in the Residual Risk
Assessment for the Miscellaneous
Viscose Processes Source Category in
Support of the Risk and Technology
Review 2019 Proposed Rule and the
Residual Risk Assessment for the
Cellulose Ethers Production Source
Category in Support of the Risk and
Technology Review 2019 Proposed Rule,
which are available in the docket for
this action. If a multipathway sitespecific assessment was performed for
this source category, a full discussion of
the uncertainties associated with that
assessment can be found in Appendix
11 of that document, Site-Specific
Human Health Multipathway Residual
Risk Assessment Report.
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Although the development of the RTR
emissions datasets involved quality
assurance/quality control processes, the
accuracy of emissions values will vary
depending on the source of the data, the
degree to which data are incomplete or
missing, the degree to which
assumptions made to complete the
datasets are accurate, errors in emission
estimates, and other factors. Some of the
emission estimates considered in this
analysis are annual totals for certain
years, and they do not reflect short-term
fluctuations during the course of a year
or variations from year to year. The
estimates of peak hourly emission rates
for the acute effects screening
assessment were based on an emission
adjustment factor applied to the average
annual hourly emission rates, which are
intended to account for emission
fluctuations due to normal facility
operations.
We recognize there is uncertainty in
ambient concentration estimates
associated with any model, including
the EPA’s recommended regulatory
dispersion model, AERMOD. In using a
model to estimate ambient pollutant
concentrations, the user chooses certain
options to apply. For RTR assessments,
we select some model options that have
the potential to overestimate ambient air
concentrations (e.g., not including
plume depletion or pollutant
transformation). We select other model
options that have the potential to
underestimate ambient impacts (e.g., not
including building downwash). Other
options that we select have the potential
to either under- or overestimate ambient
levels (e.g., meteorology and receptor
locations). On balance, considering the
directional nature of the uncertainties
commonly present in ambient
concentrations estimated by dispersion
models, the approach we apply in the
RTR assessments should yield unbiased
estimates of ambient HAP
concentrations. We also note that the
selection of meteorology dataset
location could have an impact on the
risk estimates. As we continue to update
and expand our library of
meteorological station data used in our
risk assessments, we expect to reduce
this variability.
47359
emission rates for all relevant HAP, the
uncertainties in our emission inventory
likely dominate the uncertainties in the
exposure assessment. Some
uncertainties in our exposure
assessment include human mobility,
using the centroid of each census block,
assuming lifetime exposure, and
assuming only outdoor exposures. For
most of these factors, there is neither an
under nor overestimate when looking at
the maximum individual risk or the
incidence, but the shape of the
distribution of risks may be affected.
With respect to outdoor exposures,
actual exposures may not be as high if
people spend time indoors, especially
for very reactive pollutants or larger
particles. For all factors, we reduce
uncertainty when possible. For
example, with respect to census-block
centroids, we analyze large blocks using
aerial imagery and adjust locations of
the block centroids to better represent
the population in the blocks. We also
add additional receptor locations where
the population of a block is not well
represented by a single location.
d. Uncertainties in Dose-Response
Relationships
c. Uncertainties in Inhalation Exposure
Assessment
There are uncertainties inherent in
the development of the dose-response
values used in our risk assessments for
cancer effects from chronic exposures
and noncancer effects from both chronic
and acute exposures. Some
uncertainties are generally expressed
quantitatively, and others are generally
expressed in qualitative terms. We note,
as a preface to this discussion, a point
on dose-response uncertainty that is
stated in the EPA’s 2005 Guidelines for
Carcinogen Risk Assessment; namely,
that ‘‘the primary goal of EPA actions is
protection of human health;
accordingly, as an Agency policy, risk
assessment procedures, including
default options that are used in the
absence of scientific data to the
contrary, should be health protective’’
(EPA’s 2005 Guidelines for Carcinogen
Risk Assessment, page 1–7). This is the
approach followed here as summarized
in the next paragraphs.
Cancer UREs used in our risk
assessments are those that have been
developed to generally provide an upper
bound estimate of risk.20 That is, they
represent a ‘‘plausible upper limit to the
true value of a quantity’’ (although this
is usually not a true statistical
confidence limit). In some
circumstances, the true risk could be as
Although every effort is made to
identify all of the relevant facilities and
emission points, as well as to develop
accurate estimates of the annual
20 IRIS glossary (https://ofmpub.epa.gov/sor_
internet/registry/termreg/searchandretrieve/
glossariesandkeywordlists/search.do?details=&
glossaryName=IRIS%20Glossary).
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low as zero; however, in other
circumstances the risk could be
greater.21 Chronic noncancer RfC and
reference dose (RfD) values represent
chronic exposure levels that are
intended to be health-protective levels.
To derive dose-response values that are
intended to be ‘‘without appreciable
risk,’’ the methodology relies upon an
uncertainty factor (UF) approach,22
which considers uncertainty, variability,
and gaps in the available data. The UFs
are applied to derive dose-response
values that are intended to protect
against appreciable risk of deleterious
effects.
Many of the UFs used to account for
variability and uncertainty in the
development of acute dose-response
values are quite similar to those
developed for chronic durations.
Additional adjustments are often
applied to account for uncertainty in
extrapolation from observations at one
exposure duration (e.g., 4 hours) to
derive an acute dose-response value at
another exposure duration (e.g., 1 hour).
Not all acute dose-response values are
developed for the same purpose, and
care must be taken when interpreting
the results of an acute assessment of
human health effects relative to the
dose-response value or values being
exceeded. Where relevant to the
estimated exposures, the lack of acute
dose-response values at different levels
of severity should be factored into the
risk characterization as potential
uncertainties.
Uncertainty also exists in the
selection of ecological benchmarks for
the environmental risk screening
assessment. We established a hierarchy
of preferred benchmark sources to allow
selection of benchmarks for each
environmental HAP at each ecological
assessment endpoint. We searched for
benchmarks for three effect levels (i.e.,
no-effects level, threshold-effect level,
and probable effect level), but not all
combinations of ecological assessment/
environmental HAP had benchmarks for
all three effect levels. Where multiple
effect levels were available for a
particular HAP and assessment
endpoint, we used all of the available
effect levels to help us determine
whether risk exists and whether the risk
21 An exception to this is the URE for benzene,
which is considered to cover a range of values, each
end of which is considered to be equally plausible,
and which is based on maximum likelihood
estimates.
22 See A Review of the Reference Dose and
Reference Concentration Processes, U.S. EPA,
December 2002, and Methods for Derivation of
Inhalation Reference Concentrations and
Application of Inhalation Dosimetry, U.S. EPA,
1994.
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could be considered significant and
widespread.
Although we make every effort to
identify appropriate human health effect
dose-response values for all pollutants
emitted by the sources in this risk
assessment, some HAP emitted by the
CEP source category are lacking doseresponse assessments. Accordingly,
these pollutants cannot be included in
the quantitative risk assessment, which
could result in quantitative estimates
understating HAP risk. To help to
alleviate this potential underestimate,
where we conclude similarity with a
HAP for which a dose-response value is
available, we use that value as a
surrogate for the assessment of the HAP
for which no value is available. To the
extent use of surrogates indicates
appreciable risk, we may identify a need
to increase priority for an IRIS
assessment for that substance. We
additionally note that, generally
speaking, HAP of greatest concern due
to environmental exposures and hazard
are those for which dose-response
assessments have been performed,
reducing the likelihood of understating
risk. Further, HAP not included in the
quantitative assessment are assessed
qualitatively and considered in the risk
characterization that informs the risk
management decisions, including
consideration of HAP reductions
achieved by various control options. For
the MVP source category, we have
identified appropriate human health
effect dose-response values for all
pollutants.
For a group of compounds that are
unspeciated (e.g., glycol ethers), we
conservatively use the most protective
dose-response value of an individual
compound in that group to estimate
risk. Similarly, for an individual
compound in a group (e.g., ethylene
glycol diethyl ether) that does not have
a specified dose-response value, we also
apply the most protective dose-response
value from the other compounds in the
group to estimate risk.
e. Uncertainties in Acute Inhalation
Screening Assessments
In addition to the uncertainties
highlighted above, there are several
factors specific to the acute exposure
assessment that the EPA conducts as
part of the risk review under section 112
of the CAA. The accuracy of an acute
inhalation exposure assessment
depends on the simultaneous
occurrence of independent factors that
may vary greatly, such as hourly
emissions rates, meteorology, and the
presence of a person. In the acute
screening assessment that we conduct
under the RTR program, we assume that
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peak emissions from the source category
and reasonable worst-case air dispersion
conditions (i.e., 99th percentile) cooccur. We then include the additional
assumption that a person is located at
this point at the same time. Together,
these assumptions represent a
reasonable worst-case exposure
scenario. In most cases, it is unlikely
that a person would be located at the
point of maximum exposure during the
time when peak emissions and
reasonable worst-case air dispersion
conditions occur simultaneously.
f. Uncertainties in the Multipathway
and Environmental Risk Screening
Assessments
For each source category, we
generally rely on site-specific levels of
PB–HAP or environmental HAP
emissions to determine whether a
refined assessment of the impacts from
multipathway exposures is necessary or
whether it is necessary to perform an
environmental screening assessment.
This determination is based on the
results of a three-tiered screening
assessment that relies on the outputs
from models—TRIM.FaTE and
AERMOD—that estimate environmental
pollutant concentrations and human
exposures for five PB–HAP (dioxins,
POM, mercury, cadmium, and arsenic)
and two acid gases (HF and HCl). For
lead, we use AERMOD to determine
ambient air concentrations, which are
then compared to the secondary
NAAQS standard for lead. Two
important types of uncertainty
associated with the use of these models
in RTR risk assessments and inherent to
any assessment that relies on
environmental modeling are model
uncertainty and input uncertainty.23
Model uncertainty concerns whether
the model adequately represents the
actual processes (e.g., movement and
accumulation) that might occur in the
environment. For example, does the
model adequately describe the
movement of a pollutant through the
soil? This type of uncertainty is difficult
to quantify. However, based on feedback
received from previous EPA SAB
reviews and other reviews, we are
confident that the models used in the
screening assessments are appropriate
and state-of-the-art for the multipathway
and environmental screening risk
assessments conducted in support of
RTR.
23 In the context of this discussion, the term
‘‘uncertainty’’ as it pertains to exposure and risk
encompasses both variability in the range of
expected inputs and screening results due to
existing spatial, temporal, and other factors, as well
as uncertainty in being able to accurately estimate
the true result.
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Input uncertainty is concerned with
how accurately the models have been
configured and parameterized for the
assessment at hand. For Tier 1 of the
multipathway and environmental
screening assessments, we configured
the models to avoid underestimating
exposure and risk. This was
accomplished by selecting upper-end
values from nationally representative
datasets for the more influential
parameters in the environmental model,
including selection and spatial
configuration of the area of interest, lake
location and size, meteorology, surface
water, soil characteristics, and structure
of the aquatic food web. We also assume
an ingestion exposure scenario and
values for human exposure factors that
represent reasonable maximum
exposures.
In Tier 2 of the multipathway and
environmental screening assessments,
we refine the model inputs to account
for meteorological patterns in the
vicinity of the facility versus using
upper-end national values, and we
identify the actual location of lakes near
the facility rather than the default lake
location that we apply in Tier 1. By
refining the screening approach in Tier
2 to account for local geographical and
meteorological data, we decrease the
likelihood that concentrations in
environmental media are overestimated,
thereby increasing the usefulness of the
screening assessment. In Tier 3 of the
screening assessments, we refine the
model inputs again to account for hourby-hour plume rise and the height of the
mixing layer. We can also use those
hour-by-hour meteorological data in a
TRIM.FaTE run using the screening
configuration corresponding to the lake
location. These refinements produce a
more accurate estimate of chemical
concentrations in the media of interest,
thereby reducing the uncertainty with
those estimates. The assumptions and
the associated uncertainties regarding
the selected ingestion exposure scenario
are the same for all three tiers.
For the environmental screening
assessment for acid gases, we employ a
single-tiered approach. We use the
modeled air concentrations and
compare those with ecological
benchmarks.
For all tiers of the multipathway and
environmental screening assessments,
our approach to addressing model input
uncertainty is generally cautious. We
choose model inputs from the upper
end of the range of possible values for
the influential parameters used in the
models, and we assume that the
exposed individual exhibits ingestion
behavior that would lead to a high total
exposure. This approach reduces the
likelihood of not identifying high risks
for adverse impacts.
Despite the uncertainties, when
individual pollutants or facilities do not
exceed screening threshold emission
rates (i.e., screen out), we are confident
that the potential for adverse
multipathway impacts on human health
is very low. On the other hand, when
individual pollutants or facilities do
exceed screening threshold emission
rates, it does not mean that impacts are
significant, only that we cannot rule out
that possibility and that a refined
assessment for the site might be
necessary to obtain a more accurate risk
characterization for the source category.
The EPA evaluates the following HAP
in the multipathway and/or
environmental risk screening
assessments, where applicable: Arsenic,
cadmium, dioxins/furans, lead, mercury
(both inorganic and methyl mercury),
POM, HCl, and HF. These HAP
represent pollutants that can cause
adverse impacts either through direct
exposure to HAP in the air or through
exposure to HAP that are deposited
from the air onto soils and surface
waters and then through the
environment into the food web. These
HAP represent those HAP for which we
can conduct a meaningful multipathway
or environmental screening risk
assessment. For other HAP not included
in our screening assessments, the model
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has not been parameterized such that it
can be used for that purpose. In some
cases, depending on the HAP, we may
not have appropriate multipathway
models that allow us to predict the
concentration of that pollutant. The EPA
acknowledges that other HAP beyond
these that we are evaluating may have
the potential to cause adverse effects
and, therefore, the EPA may evaluate
other relevant HAP in the future, as
modeling science and resources allow.
IV. Analytical Results and Proposed
Decisions
A. What are the results of the risk
assessment and analyses?
1. MVP Source Category
a. Chronic Inhalation Risk Assessment
Results
Table 2 of this preamble provides an
overall summary of the inhalation risk
results of the MVP source category. The
results of the chronic baseline
inhalation cancer risk assessment
indicate that, based on estimates of
current actual and allowable emissions,
the MIR posed by the source category
was estimated to be less than 1-in-1
million. The risk driver is acetaldehyde
emissions from viscose process
equipment. The total estimated cancer
incidence from MVP emission sources
based on actual and allowable emission
levels is 0.000006 excess cancer cases
per year, or one case in every 167,000
years. Emissions of acetaldehyde
contributed 100 percent to this cancer
incidence. Based upon actual or
allowable emissions, no people were
exposed to cancer risks greater than or
equal to 1-in-1 million.
The maximum chronic noncancer HI
(TOSHI) values for the MVP source
category, based on actual and allowable
emissions, were estimated to be less
than 1. Based upon actual and allowable
emissions, respiratory risks were driven
by CS2 emissions from viscose process
equipment.
TABLE 2—MVP INHALATION RISK ASSESSMENT RESULTS 1
Number of
facilities
Risk assessment
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Maximum
individual
cancer risk
(in 1 million) 2
Estimated
population
at increased
risk of
cancer ≥1in-1 million
Estimated
annual cancer
incidence
(cases per year)
Maximum
chronic
noncancer
TOSHI 3
Maximum
refined acute
noncancer
HQ 4
Baseline Actual Emissions
Source Category ................................
Facility-Wide .......................................
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TABLE 2—MVP INHALATION RISK ASSESSMENT RESULTS 1—Continued
Number of
facilities
Risk assessment
Estimated
population
at increased
risk of
cancer ≥1in-1 million
Maximum
individual
cancer risk
(in 1 million) 2
Estimated
annual cancer
incidence
(cases per year)
Maximum
chronic
noncancer
TOSHI 3
Maximum
refined acute
noncancer
HQ 4
Baseline Allowable Emissions
Source Category ................................
5
<1
0
0.000006
0.05
........................
1 Based
on actual, allowable, and facility-wide emissions.
individual excess lifetime cancer risk due to HAP emissions from the source category and facility-wide.
TOSHI. The target organ with the highest TOSHI for the MVP source category is the respiratory system.
4 The maximum estimated acute exposure concentration was divided by available short-term threshold values to develop an array of HQ values. HQ values shown use the lowest available acute threshold value, which in most cases is the REL. When an HQ exceeds 1, we also show
the HQ using the next lowest available acute dose-response value. The HQ of 0.4 is based upon an acute ERPG–1.
2 Maximum
3 Maximum
b. Screening Level Acute Risk
Assessment Results
Worst-case acute HQs were calculated
for every HAP for which there is an
acute health benchmark using actual
emissions. The maximum refined offsite acute noncancer HQ value for the
MVP source category was less than 1
from CS2 emissions (based on the acute
(1-hour) ERPG–1 for CS2). It is also
important to note that the highest HQ is
based on hourly emissions multiplier
for each emission process group ranging
from 1 to 37 times the annual emissions
rate. Acute HQs are not calculated for
allowable or whole facility emissions.
c. Multipathway Risk Screening
Results
The five facilities modeled in the
MVP source category did not report any
emissions of lead compounds,
carcinogenic PB–HAP (arsenic, dioxin/
furans, and POM compounds) or any
noncarcinogenic PB–HAP (cadmium
and mercury). Since, there are no PB–
HAP or lead compounds identified in
the emissions inventory for this source
category, no further assessment of
multipathway risk was conducted.
d. Environmental Risk Screening
Results
The five facilities modeled in the
MVP source category did not report any
emissions of lead compounds, PB–HAP,
or any acid gases (HCl or HF). Since
there are no ecological HAP identified
in the emissions inventory for this
source category, no further assessment
of ecological risk was conducted.
e. Facility-Wide Risk Results
Results of the assessment of facilitywide emissions indicate that none of the
five facilities have a facility-wide MIR
cancer risk greater than 1-in-1 million
(refer to Table 2). The maximum
facility-wide cancer risk is 1-in-1
million, driven by formaldehyde,
cadmium compounds, and nickel
compounds from a non-category fugitive
area source. The total estimated cancer
incidence from the whole facility is
0.00006 excess cancer cases per year, or
one case in every 16,700 years, with
zero people estimated to have cancer
risks greater than 1-in-1 million. The
maximum facility-wide chronic
noncancer TOSHI is estimated to be less
than 1, driven by source category
emissions of CS2 from viscose process
equipment.
2. CEP Source Category
a. Chronic Inhalation Risk Assessment
Results
Table 3 of this preamble provides an
overall summary of the inhalation risk
results of the CEP source category. The
results of the chronic baseline
inhalation cancer risk assessment
indicate that, based on estimates of
current actual and allowable emissions,
the MIR posed by the source category
was estimated to be 80-in-1 million. The
risk driver is from emissions of ethylene
oxide from cellulose ether process
equipment used to produce
hydroxyethyl cellulose (HEC). The total
estimated cancer incidence from CEP
emission sources based on actual and
allowable emission levels is 0.01 excess
cancer cases per year, or one case in
every 100 years. Emissions of ethylene
oxide contributed 99 percent to this
cancer incidence based upon actual
emissions. Based upon actual or
allowable emissions, 105,000 people
were exposed to cancer risks greater
than or equal to 1-in-1 million. The
maximum chronic noncancer HI
(TOSHI) values for the source category,
based on actual and allowable
emissions, were estimated to be less
than 1. Based upon actual and allowable
emissions, respiratory risks were driven
by chlorine emissions from cellulose
ether process equipment.
TABLE 3—CEP INHALATION RISK ASSESSMENT RESULTS 1
Number of
facilities
Risk assessment
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Maximum
individual
cancer risk
(in 1 million)
Estimated
population
at increased
risk of
cancer
≥1-in-1 million
Estimated
annual cancer
incidence
(cases per
year)
Maximum
chronic
noncancer
TOSHI 3
Maximum
screening
acute
noncancer
HQ 4
Baseline Actual Emissions
Source Category ......................................
Facility-Wide .............................................
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3
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2 500
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570,000
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0.04
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TABLE 3—CEP INHALATION RISK ASSESSMENT RESULTS 1—Continued
Maximum
individual
cancer risk
(in 1 million)
Number of
facilities
Risk assessment
Estimated
population
at increased
risk of
cancer
≥1-in-1 million
Estimated
annual cancer
incidence
(cases per
year)
Maximum
chronic
noncancer
TOSHI 3
Maximum
screening
acute
noncancer
HQ 4
Baseline Allowable Emissions
Source Category ......................................
3
80
112,000
0.01
0.2
........................
1 Based
on actual, allowable, and whole facility emissions.
individual excess lifetime cancer risk due to ethylene oxide emissions from outside of the source category identified as releases
from holding ponds, storage tanks, tank truck unloading, and equipment/vent releases.
3 Maximum TOSHI. The target organ with the highest TOSHI for the CEP source category is the respiratory system.
4 The maximum estimated acute exposure concentration was divided by available short-term threshold values to develop an array of HQ values. HQ values shown use the lowest available acute threshold value, which in most cases is the REL. When an HQ exceeds 1, we also show
the HQ using the next lowest available acute dose-response value.
5 Maximum TOSHI from whole facility are from chlorine emissions from non-category sources (classified as other). The target organ with the
highest TOSHI is the respiratory system.
2 Maximum
b. Screening Level Acute Risk
Assessment Results
Worst-case acute HQs were calculated
for every HAP for which there is an
acute health benchmark using actual
emissions. The maximum refined offsite acute noncancer HQ value for the
source category was less than 1 from
methanol emissions from cellulose ether
process equipment (based on the acute
(1-hour) REL for methanol). It is also
important to note that the highest HQ is
based on an hourly emissions multiplier
of 10 times the annual emissions rate.
Acute HQs are not calculated for
allowable or whole facility emissions.
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c. Multipathway Risk Screening Results
One facility within the CEP source
category reported emissions of
multipathway pollutants of lead
compounds, carcinogenic PB–HAP
(arsenic), and noncarcinogenic PB–HAP
(cadmium and mercury). Results of the
worst-case Tier 1 screening analysis
indicate that PB–HAP emissions (based
on estimates of actual emissions)
emitted from the facility exceeded the
screening values for the carcinogenic
PB–HAP (arsenic compounds) by a
factor of 2 and for the noncarcinogenic
PB–HAP (cadmium and mercury) was
equal to the Tier 1 screening value of 1.
Based on this Tier 1 screening
assessment for carcinogens, the arsenic,
cadmium, and mercury emission rates
for the single facility were below our
level of concern. In evaluating the
potential for multipathway effects from
emissions of lead, we compared
modeled annual lead concentrations to
the secondary NAAQS for lead (0.15 mg/
m3). The highest annual average lead
concentration of 0.00001 mg/m3 is well
below the NAAQS for lead, indicating a
low potential for multipathway impacts
of concern due to lead.
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d. Environmental Risk Screening
Results
As described in section III.A of this
preamble, we conducted an
environmental risk screening
assessment for the CEP source category.
The three facilities modeled in the
source category reported emissions of
lead compounds and the above PB–
HAP, as well as an acid gas (HCl). In the
Tier 1 screening analysis for PB–HAP,
we did not find any exceedances of the
ecological benchmarks evaluated. For
lead, we did not estimate any
exceedances of the secondary lead
NAAQS. For HCl, the average modeled
concentration around each facility (i.e.,
the average concentration of all off-site
data points in the modeling domain) did
not exceed any ecological benchmark. In
addition, each individual modeled
concentration of HCl (i.e., each off-site
data point in the modeling domain) was
below the ecological benchmarks for all
facilities. Based on the results of the
environmental risk screening analysis,
we do not expect an adverse
environmental effect as a result of HAP
emissions from this source category.
e. Facility-Wide Risk Results
Results of the assessment of facilitywide emissions indicate that all three
facilities modeled have a facility-wide
MIR cancer risk greater than 1-in-1
million (refer to Table 3). The maximum
facility-wide cancer risk is 500-in-1
million, mainly driven by ethylene
oxide from sources outside the source
category, including holding ponds,
storage tanks, tank truck unloading, and
equipment/vent releases. The next
highest cancer risk was 80-in-1 million,
based on whole facility emissions of
ethylene oxide. The total estimated
cancer incidence from the whole facility
is 0.04 excess cancer cases per year, or
one case in every 25 years, with 570,000
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people estimated to have cancer risks
greater than 1-in-1 million and 2,000
people with risks greater than 100-in-1
million. The maximum facility-wide
chronic noncancer TOSHI is estimated
to be equal to 4, driven by emissions of
chlorine from non-category sources.
3. What demographic groups might
benefit from this regulation?
To examine the potential for any
environmental justice issues that might
be associated with the MVP and CEP
source categories, we performed a
demographic analysis, which is an
assessment of risks to individual
demographic groups of the populations
living within 5 km and within 50 km of
the facilities. In the analysis, we
evaluated the distribution of HAPrelated cancer and noncancer risks from
the MVP and CEP source categories
across different demographic groups
within the populations living near
facilities.
For the MVP source category
demographic analysis, the results for
various demographic groups are based
on the estimated risk from actual
emissions levels for the population
living within 50 km of the facilities.
When examining the risk levels of those
exposed to emissions from MVP
facilities, we find that no one is exposed
to a cancer risk at or above 1-in-1
million or to a chronic noncancer
TOSHI greater than 1. The methodology
and the results of the MVP demographic
analysis are presented in a technical
report, Risk and Technology Review—
Analysis of Demographic Factors for
Populations Living Near Miscellaneous
Viscose Processes Facilities, available in
the docket for this action.
The results of the CEP demographic
analysis are summarized in Table 4
below. These results, for various
demographic groups, are based on the
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estimated risk from actual emissions
levels for the population living within
50 km of the CEP facilities.
TABLE 4—CEP DEMOGRAPHIC RISK ANALYSIS RESULTS
[CEP Source Category Demographic Assessment Results—50 km Study Area Radius]
Population
with cancer
risk greater
than or equal
to 1-in-1
million
Nationwide
Total Population ...........................................................................................................................
Population
with hazard
index greater
than 1
Source Category
317,746,049
104,572
0
White and Minority by Percent
White ............................................................................................................................................
Minority ........................................................................................................................................
62
38
51
49
0
0
Minority by Percent
African American .........................................................................................................................
Native American ..........................................................................................................................
Hispanic or Latino (includes white and nonwhite) .......................................................................
Other and Multiracial ...................................................................................................................
12
0.8
18
7
37
0.3
7
4
0
0
0
0
Income by Percent
Below Poverty Level ....................................................................................................................
Above Poverty Level ....................................................................................................................
14
86
12
88
0
0
Education by Percent
Over 25 and without a High School Diploma ..............................................................................
Over 25 and with a High School Diploma ...................................................................................
14
86
16
84
0
0
Linguistically Isolated by Percent
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Linguistically Isolated ...................................................................................................................
The results of the CEP source category
demographic analysis indicate that
emissions from the source category
expose approximately 104,572 people to
a cancer risk at or above 1-in-1 million
and approximately zero people to a
chronic noncancer TOSHI greater than
1. The percentages of the at-risk
population in three demographic groups
(African American, above poverty level,
and over 25 without highs school
diploma) are greater than their
respective nationwide percentages. The
methodology and the results of the CEP
demographic analysis are presented in
the technical report, Risk and
Technology Review—Analysis of
Demographic Factors for Populations
Living Near Cellulose Ethers Production
Facilities, available in the docket for this
action.
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B. What are our proposed decisions
regarding risk acceptability, ample
margin of safety, and adverse
environmental effect?
1. Risk Acceptability
As noted in section II.A of this
preamble, the EPA sets standards under
CAA section 112(f)(2) using ‘‘a two-step
standard-setting approach, with an
analytical first step to determine an
‘acceptable risk’ that considers all
health information, including risk
estimation uncertainty, and includes a
presumptive limit on MIR of
approximately 1-in-10 thousand.’’ (54
FR 38045, September 14, 1989).
In this proposal, the EPA estimated
risks based on actual and allowable
emissions from the MVP and CEP
source categories. In determining
whether risks are acceptable, the EPA
considered all available health
information and risk estimation
uncertainty, as described above. The
results for the MVP and CEP source
categories indicate that both the actual
and allowable inhalation cancer risks to
the individual most exposed are below
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6
1
0
the presumptive limit of acceptability of
100-in-1 million.
The results for the MVP source
category indicate that both the actual
and allowable inhalation cancer risks to
the individual most exposed are less
than 1-in-1 million, well below the
presumptive limit of acceptability of
100-in-1 million. The MVP source
category also has chronic noncancer
inhalation exposures to HAP with
health benchmarks with TOSHI values
less than 1 (0.05), 20 times below an
exposure that the EPA has determined
is without appreciable risk of adverse
health effects. Exposures to HAP
associated with acute noncancer health
effects also are below levels of health
concern with no HAP exposures
resulting in an HQ greater than 1 (0.4)
based upon the 1-hour REL.
The results for the CEP source
category indicate that both the actual
and allowable inhalation cancer risks to
the individual most exposed are less or
equal to 80-in-1 million, below the
presumptive limit of acceptability of
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100-in-1 million. EPA estimates
emissions from the 3 facilities in the
source category would result in a cancer
incidence of 0.01 excess cancer cases
per year, or one case every 100 years
based upon actual emissions from the
source category. This incidence rate is
solely from 1 facility emitting ethylene
oxide. We estimate 105,000 individuals
are exposed to an inhalation cancer risk
equal to or greater than 1-in-1 million
from this one facility. Inhalation
exposures to HAP associated with
chronic noncancer health effects result
in a TOSHI of 0.06 based on actual
emissions, 16 times below an exposure
that the EPA has determined is without
appreciable risk of adverse health
effects. Exposures to HAP associated
with acute noncancer health effects also
are below levels of health concern with
no HAP exposures resulting in an HQ
greater than 1 (0.1) based upon the 1hour REL.
Multipathway screen values for the
CEP source category are below a level of
concern for both carcinogenic and noncarcinogenic PB–HAP as well as
emissions of lead compounds.
Maximum cancer and noncancer risk
due to ingestion exposures estimated
using Tier 1 health-protective risk
screening assumptions are below 2-in-1
million for cancer and equal to 1 based
upon Tier 1 noncancer screen values for
mercury.
Taking into account this information,
the EPA proposes that the risks
remaining after implementation of the
existing MACT standards for the CEP
and MVP source categories are
acceptable.
2. Ample Margin of Safety Analysis
The inhalation cancer risk from the
MVP source category is less than 1-in1 million and the chronic noncancer
TOSHI due to inhalation exposures is
less than 1. Additionally, the results of
the MVP acute screening analysis
showed that risks were below a level of
concern. Because we are proposing that
risks from the MVP source category are
acceptable and below the thresholds of
concern, we are proposing that the
current MACT standards applicable to
the MVP source category provide an
ample margin of safety to protect public
health.
Although we are proposing that the
risks from the three modeled facilities
within the CEP source category are
acceptable, the MIR for actual and
allowable emissions are 80-in-1 million
caused by ethylene oxide emissions
from the HEC process. We considered
whether the MACT standards applicable
to these emission points in particular, as
well as all the current MACT standards
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applicable to this source category,
provide an ample margin of safety to
protect public health. As directed by
CAA section 112(f)(2), we conducted an
analysis to determine if the current
emission standards provide an ample
margin of safety to protect public health.
Under the ample margin of safety
analysis, we evaluated the cost and
feasibility of available control
technologies and other measures
(including those considered under the
technology review) that could be
applied to the CEP source category to
further reduce the risks (or potential
risks) due to emissions of HAP
identified in the risk assessment.
The HEC production process utilizes
purified wood pulp or cotton linters to
produce alkali cellulose by adding a
caustic solution. The alkali cellulose is
then reacted with ethylene oxide to
produce HEC, which is a thickening
agent used in cosmetics, cleaning
solutions, and other household
products. This process utilizes extended
cook-out procedures to reduce the
amount of ethylene oxide not consumed
during the HEC reaction in conjunction
with an add-on control device. This
process is subject to standard 3 in Table
1 to Subpart UUUU of Part 63—
Emission Limits and Work Practice
Standards, which requires a 99-percent
reduction in HAP emissions.
As discussed in section IV.C below
and in the memo titled Technology
Review for the Cellulose Products
Manufacturing Industry—Proposed Rule
in the docket for this rulemaking, we
did not identify any developments in
processes, practices, or controls for the
CEP source category during our analysis
for this proposal. CEP facilities use
scrubbers to control emissions of
ethylene oxide, as well as other HAP,
and these devices are capable of
achieving high levels of emission
reductions. We did not identify
additional technologies capable of
further reducing emissions, or
improvements to existing technologies
that would result in further reduction of
emissions. Given that we did not
identify any developments in practices,
processes, or control technologies and
the acceptable risks remaining after
implementation of the NESHAP, we are
proposing that the existing standards for
the CEP source category provide an
ample margin of safety to protect public
health, and revision of the standards is
not required.
Lastly, regarding the facility-wide
risks due to ethylene oxide (described
above), which are due primarily to
emission sources that are not part of the
CEP source category, we intend to
evaluate these facility-wide estimated
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47365
emissions and risks further and may
address them in a separate future action,
as appropriate. In particular, the EPA is
addressing ethylene oxide in response
to the results of the latest National Air
Toxics Assessment (NATA) released in
August 2018, which identified the
chemical as a potential concern in
several areas across the country. (NATA
is the Agency’s nationwide air toxics
screening tool, designed to help the EPA
and state, local, and tribal air agencies
identify areas, pollutants, or types of
sources for further examination.) The
latest NATA estimates that ethylene
oxide significantly contributes to
potential elevated cancer risks in some
census tracts across the U.S. (less than
1 percent of the total number of tracts).
These elevated risks are largely driven
by an EPA risk value that was updated
in late 2016. The EPA will work with
industry and state, local, and tribal air
agencies as the EPA takes a two-pronged
approach to address ethylene oxide
emissions: (1) Reviewing and, as
appropriate, revising CAA regulations
for facilities that emit ethylene oxide—
starting with air toxics emissions
standards for miscellaneous organic
chemical manufacturing facilities and
commercial sterilizers; and (2)
conducting site-specific risk
assessments and, as necessary,
implementing emission control
strategies for targeted high-risk facilities.
The EPA will post updates on its work
to address ethylene oxide on its website
at: https://www.epa.gov/ethylene-oxide.
3. Adverse Environmental Effect
For the MVP source category, we did
not identify emissions of any
environmental HAP. Because we did not
identify any environmental HAP
emissions, we expect no adverse
environmental effects and are proposing
that more stringent standards are not
necessary to prevent an adverse
environmental effect.
For the CEP source category, our
analyses showed no exceedances of
ecological benchmarks and, therefore,
we do not expect there to be an adverse
environmental effect as a result of HAP
emissions from this source category. We
are proposing that it is not necessary to
set a more stringent standard to prevent
an adverse environmental effect.
C. What are the results and proposed
decisions based on our technology
review?
As described in section III.B of this
preamble, our technology review
focused on identifying developments in
practices, processes, and control
technologies for control of HAP
emissions from CEP and MVP facilities.
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In conducting the technology review,
we reviewed sources of information on
practices, processes, and control
technologies that were not considered
during the development of the Cellulose
Products Manufacturing NESHAP, as
well as looked for information on
improvements in practices, processes,
and control technologies that have
occurred since the development of the
NESHAP. The review included
reviewing the industry responses to Part
2 of the sector survey, a search of the
RBLC database and the EPA’s ADI,
reviews of air permits, and a review of
relevant literature. After reviewing the
information from the aforementioned
sources, we did not identify any
developments in practices, processes, or
control technologies to reduce HAP
emissions from the CEP and MVP
source categories. Therefore, we are
proposing that revisions to the NESHAP
are not necessary based on our review
under CAA section 112(d)(6).
While these searches did not result in
a finding of any new technologies, the
results of the ADI search suggest that the
EPA could add biofilter effluent
conductivity operating limits and
parameter monitoring as an alternative
to biofilter pH operating limits and
monitoring. This is discussed in section
IV.D below. Additional details of our
technology review can be found in the
memorandum titled Technology Review
for the Cellulose Products
Manufacturing Industry—Proposed
Rule, which is available in the docket
for this action.
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D. What other actions are we proposing?
In addition to the proposed actions
described above, we are proposing
additional revisions to the NESHAP. We
are proposing revisions to the SSM
provisions of the MACT rule in order to
ensure that they are consistent with the
Court decision in Sierra Club v. EPA,
551 F. 3d 1019 (D.C. Cir. 2008), which
vacated two provisions that exempted
sources from the requirement to comply
with otherwise applicable CAA section
112(d) emission standards during
periods of SSM. We also are proposing
various other changes, including
electronic submittal of notifications,
compliance reports, and performance
test reports; addition of periodic
emissions testing requirements and
incorporation by reference (IBR) of three
test methods (listed in section IV.D.5
below); and various technical and
editorial changes. Our analyses and
proposed changes related to these issues
are discussed below.
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1. SSM
In its 2008 decision in Sierra Club v.
EPA, 551 F.3d 1019 (D.C. Cir. 2008), the
Court vacated portions of two
provisions in the EPA’s CAA section
112 regulations governing the emissions
of HAP during periods of SSM.
Specifically, the Court vacated the SSM
exemption contained in 40 CFR
63.6(f)(1) and 40 CFR 63.6(h)(1), holding
that under section 302(k) of the CAA,
emissions standards or limitations must
be continuous in nature and that the
SSM exemption violates the CAA’s
requirement that some section 112
standards apply continuously.
We are proposing the elimination of
the SSM exemption in this rule which
appears at 40 CFR 63.5515 and Table 10
to Subpart UUUU of Part 63
(Applicability of General Provisions to
Subpart UUUU). Consistent with Sierra
Club v. EPA, we are proposing standards
in this rule that apply at all times. We
are also proposing several revisions to
Table 10 (the General Provisions
Applicability Table) as is explained in
more detail below. For example, we are
proposing to eliminate the incorporation
of the General Provisions’ requirement
that the source develop an SSM plan.
We also are proposing to eliminate and
revise certain recordkeeping and
reporting requirements related to the
SSM exemption as further described
below.
The EPA has attempted to ensure that
the provisions we are proposing to
eliminate are inappropriate,
unnecessary, or redundant in the
absence of the SSM exemption. We are
specifically seeking comment on
whether we have successfully done so.
In proposing the standards in this
rule, the EPA has taken into account
startup and shutdown periods and, for
the reasons explained below, has not
proposed alternate emission standards
for those periods. However, the EPA is
proposing alternative operating limits
for periods of startup and shutdown for
thermal oxidizers and scrubbers to
address issues with parameter
monitoring during these periods.
As discussed in the memorandum
titled Summary of the Startup and
Shutdown Data for Cellulose Products
Manufacturing, we requested data
regarding periods of startup and
shutdown as part of the 2018 survey.
Facilities did not indicate difficulty
meeting the emission standards as a
result of startup or shutdown events.
However, facilities did indicate
difficulty meeting thermal oxidizer and
scrubber operating parameters during
these periods. This is not unexpected
because these periods reflect non-steady
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state operations and production. For
sources equipped with thermal
oxidizers, survey responses indicated
that they could not meet the setpoint
temperature during periods of startup.
This is likely due to a temperature drop
when the HAP-laden air stream is
initially added to the oxidizer. Survey
responses indicated that, for sources
equipped with scrubbers (wet, water,
and caustic), pressure drop, liquid-togas ratios, and scrubber liquid flow rate
parameter limits could not be met
during startup and shutdown. This is
not unexpected since pluggage can
occur during non-stable conditions,
limiting the liquid flow rate and
subsequently reducing the pressure
drop across the scrubber due to the lack
of liquid flow. Consequently, the EPA is
proposing the following alternative
operating parameter options to
demonstrate continuous compliance
and ensure proper control device
operations during periods of startup and
shutdown:
• Wet or caustic scrubber: As an
alternative to pressure drop, liquid flow
rate, or liquid-to-gas ratio, confirm that
the scrubber is operating properly prior
to emission unit startup and continue
operation until emission unit shutdown
is complete. Appropriate startup and
shutdown operating parameters may be
based on equipment design,
manufacturer’s recommendations, or
other site-specific operating values
established for normal operating
periods. Do not include these
parameters when determining the daily
average.
• Thermal oxidizer: As an alternative
to the minimum firebox temperature,
confirm that the oxidizer is operating
properly prior to emission unit startup
(e.g., firebox temperature has reached
the setpoint temperature established in
the most recent stack test). Do not
include these parameters when
determining the daily average.
The survey responses for other control
devices did not indicate any issues
meeting operating parameters during
periods of startup and shutdown. One
additional survey response requested
the addition of a shutdown work
practice for process lines and equipment
venting. This response suggested that, in
the event of a shutdown, it would be
appropriate to purge the process gas
and/or liquid to an emission control
device, recovery device, or return to the
process. Additionally, the response
suggested that gas streams may be
emitted if they contain less than 50
pounds of volatile organic compounds
(VOC) or the lower explosive limit is
less than 10 percent. The Agency is
requesting comment to determine if this
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would be an appropriate work practice.
Emissions from venting due to
shutdown should be accounted for in
the compliance demonstration in the
semiannual compliance report.
Periods of startup, normal operations,
and shutdown are all predictable and
routine aspects of a source’s operations.
Malfunctions, in contrast, are neither
predictable nor routine. Instead they
are, by definition, sudden, infrequent,
and not reasonably preventable failures
of emissions control, process, or
monitoring equipment. (40 CFR 63.2)
(Definition of malfunction). The EPA
interprets CAA section 112 as not
requiring emissions that occur during
periods of malfunction to be factored
into development of CAA section 112
standards and this reading has been
upheld as reasonable by the Court in
U.S. Sugar Corp. v. EPA, 830 F.3d 579,
606–610 (2016). Under CAA section
112, emissions standards for new
sources must be no less stringent than
the level ‘‘achieved’’ by the best
controlled similar source and for
existing sources generally must be no
less stringent than the average emission
limitation ‘‘achieved’’ by the best
performing 12 percent of sources in the
category. There is nothing in CAA
section 112 that directs the Agency to
consider malfunctions in determining
the level ‘‘achieved’’ by the best
performing sources when setting
emission standards. As the Court has
recognized, the phrase ‘‘average
emissions limitation achieved by the
best performing 12 percent of’’ sources
‘‘says nothing about how the
performance of the best units is to be
calculated.’’ Nat’l Ass’n of Clean Water
Agencies v. EPA, 734 F.3d 1115, 1141
(D.C. Cir. 2013). While the EPA
accounts for variability in setting
emissions standards, nothing in CAA
section 112 requires the Agency to
consider malfunctions as part of that
analysis. The EPA is not required to
treat a malfunction in the same manner
as the type of variation in performance
that occurs during routine operations of
a source. A malfunction is a failure of
the source to perform in a ‘‘normal or
usual manner’’ and no statutory
language compels the EPA to consider
such events in setting CAA section 112
standards.
As the Court recognized in U.S. Sugar
Corp, accounting for malfunctions in
setting standards would be difficult, if
not impossible, given the myriad
different types of malfunctions that can
occur across all sources in the category
and given the difficulties associated
with predicting or accounting for the
frequency, degree, and duration of
various malfunctions that might occur.
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Id. at 608 (‘‘the EPA would have to
conceive of a standard that could apply
equally to the wide range of possible
boiler malfunctions, ranging from an
explosion to minor mechanical defects.
Any possible standard is likely to be
hopelessly generic to govern such a
wide array of circumstances.’’) As such,
the performance of units that are
malfunctioning is not ‘‘reasonably’’
foreseeable. See, e.g., Sierra Club v.
EPA, 167 F.3d 658, 662 (D.C. Cir. 1999)
(‘‘The EPA typically has wide latitude
in determining the extent of datagathering necessary to solve a problem.
We generally defer to an agency’s
decision to proceed on the basis of
imperfect scientific information, rather
than to ‘invest the resources to conduct
the perfect study.’ ’’) See also,
Weyerhaeuser v. Costle, 590 F.2d 1011,
1058 (D.C. Cir. 1978) (‘‘In the nature of
things, no general limit, individual
permit, or even any upset provision can
anticipate all upset situations. After a
certain point, the transgression of
regulatory limits caused by
‘uncontrollable acts of third parties,’
such as strikes, sabotage, operator
intoxication or insanity, and a variety of
other eventualities, must be a matter for
the administrative exercise of case-bycase enforcement discretion, not for
specification in advance by
regulation.’’). In addition, emissions
during a malfunction event can be
significantly higher than emissions at
any other time of source operation. For
example, if an air pollution control
device with 99-percent removal goes offline as a result of a malfunction (as
might happen if, for example, the bags
in a baghouse catch fire) and the
emission unit is a steady state type unit
that would take days to shut down, the
source would go from 99-percent
control to zero control until the control
device was repaired. The source’s
emissions during the malfunction
would be 100 times higher than during
normal operations. As such, the
emissions over a 4-day malfunction
period would exceed the annual
emissions of the source during normal
operations. As this example illustrates,
accounting for malfunctions could lead
to standards that are not reflective of
(and significantly less stringent than)
levels that are achieved by a wellperforming non-malfunctioning source.
It is reasonable to interpret CAA section
112 to avoid such a result. The EPA’s
approach to malfunctions is consistent
with CAA section 112 and is a
reasonable interpretation of the statute.
Although no statutory language
compels the EPA to set standards for
malfunctions, the EPA has the
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discretion to do so where feasible. For
example, in the Petroleum Refinery
Sector RTR, the EPA established a work
practice standard for unique types of
malfunction that result in releases from
pressure relief devices or emergency
flaring events because the EPA had
information to determine that such work
practices reflected the level of control
that applies to the best performers. 80
FR 75178, 75211–14 (December 1,
2015). The EPA will consider whether
circumstances warrant setting standards
for a particular type of malfunction and,
if so, whether the EPA has sufficient
information to identify the relevant best
performing sources and establish a
standard for such malfunctions. We also
encourage commenters to provide any
such information.
The EPA anticipates that it is unlikely
that a malfunction will result in a
violation of the standard for this source
category. For example, facilities using
thermal oxidizers as pollution control
equipment indicated in the 2018 survey
that interlocks would shut down the
process if an oxidizer malfunction
occurred, and facilities may also have
back-up oxidizers that could be used to
treat the emissions. The MACT
standards are based on a percent
reduction of HAP over a 6-month rolling
period per group of equipment.
Therefore, the malfunction of a singular
piece of equipment in a single month
over this period is unlikely to result in
an exceedance of the standard. The EPA
is soliciting information on the type of
events that constitute a malfunction
event, and best practices and best level
of emission control during malfunction
events. The EPA is also soliciting
information on the cost savings
associated with these practices. In
addition, the EPA is soliciting specific
supporting data on HAP emissions
during malfunction events for the MVP
and CEP source categories, including
the cause of malfunctions, the frequency
of malfunctions, the duration of
malfunctions, and the estimate of HAP
emitted during each malfunction.
In the unlikely event that a source
fails to comply with the applicable CAA
section 112(d) standards as a result of a
malfunction event, the EPA would
determine an appropriate response
based on, among other things, the good
faith efforts of the source to minimize
emissions during malfunction periods,
including preventative and corrective
actions, as well as root cause analyses
to ascertain and rectify excess
emissions. The EPA would also
consider whether the source’s failure to
comply with the CAA section 112(d)
standard was, in fact, sudden,
infrequent, not reasonably preventable
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and was not instead caused in part by
poor maintenance or careless operation.
40 CFR 63.2 (definition of malfunction).
If the EPA determines in a particular
case that an enforcement action against
a source for violation of an emission
standard is warranted, the source can
raise any and all defenses in that
enforcement action and the federal
district court will determine what, if
any, relief is appropriate. The same is
true for citizen enforcement actions.
Similarly, the presiding officer in an
administrative proceeding can consider
any defense raised and determine
whether administrative penalties are
appropriate.
In summary, the EPA interpretation of
the CAA and, in particular, section 112,
is reasonable and encourages practices
that will avoid malfunctions.
Administrative and judicial procedures
for addressing exceedances of the
standards fully recognize that violations
may occur despite good faith efforts to
comply and can accommodate those
situations. U.S. Sugar Corp. v. EPA, 830
F.3d 579, 606–610 (2016).
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a. General Duty
We are proposing to revise the
General Provisions table (Table 10)
entry for 40 CFR 63.6(e)(1) and (2) by
redesignating it as 40 CFR 63.6(e)(1)(i)
and changing the ‘‘yes’’ in column 4 to
a ‘‘no.’’ Section 63.6(e)(1)(i) describes
the general duty to minimize emissions.
Some of the language in that section is
no longer necessary or appropriate in
light of the elimination of the SSM
exemption. We are proposing instead to
add general duty regulatory text at 40
CFR 63.5515 that reflects the general
duty to minimize emissions while
eliminating the reference to periods
covered by an SSM exemption. The
current language in 40 CFR 63.6(e)(1)(i)
characterizes what the general duty
entails during periods of SSM. With the
elimination of the SSM exemption,
there is no need to differentiate between
normal operations, startup and
shutdown, and malfunction events in
describing the general duty. Therefore,
the language the EPA is proposing for 40
CFR 63.5515 does not include that
language from 40 CFR 63.6(e)(1).
We are also proposing to revise the
General Provisions table (Table 10) by
adding an entry for 40 CFR 63.6(e)(1)(ii)
and including a ‘‘no’’ in column 4.
Section 63.6(e)(1)(ii) imposes
requirements that are not necessary with
the elimination of the SSM exemption
or are redundant with the general duty
requirement being added at 40 CFR
63.5515.
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b. SSM Plan
We are proposing to revise the
General Provisions table (Table 10)
entry for 40 CFR 63.6(e)(3) by changing
the ‘‘yes’’ in column 4 to a ‘‘no.’’
Generally, the paragraphs under 40 CFR
63.6(e)(3) require development of an
SSM plan and specify SSM
recordkeeping and reporting
requirements related to the SSM plan.
As noted, the EPA is proposing to
remove the SSM exemptions. Therefore,
affected units will be subject to an
emission standard during such events.
The applicability of a standard during
such events will ensure that sources
have ample incentive to plan for and
achieve compliance and, thus, the SSM
plan requirements are no longer
necessary.
c. Compliance With Standards
We are proposing to revise the
General Provisions table (Table 10)
entry for 40 CFR 63.6(f)(1) by changing
the ‘‘yes’’ in column 4 to a ‘‘no.’’ The
current language of 40 CFR 63.6(f)(1)
exempts sources from non-opacity
standards during periods of SSM. As
discussed above, the Court in Sierra
Club vacated the exemptions contained
in this provision and held that the CAA
requires that some CAA section 112
standard apply continuously. Consistent
with Sierra Club, the EPA is proposing
to revise standards in this rule to apply
at all times.
We are proposing to revise the
General Provisions table (Table 10)
entry for 40 CFR 63.6(h) by
redesignating it as 40 CFR 63.6(h)(1) and
changing the ‘‘yes’’ in column 4 to a
‘‘no.’’ The current language of 40 CFR
63.6(h)(1) exempts sources from opacity
standards during periods of SSM. As
discussed above, the Court in Sierra
Club vacated the exemptions contained
in this provision and held that the CAA
requires that some CAA section 112
standard apply continuously. Consistent
with Sierra Club, the EPA is proposing
to revise standards in this rule to apply
at all times.
d. Performance Testing
We are proposing to revise the
General Provisions table (Table 10)
entry for 40 CFR 63.7(e)(1) by changing
the ‘‘yes’’ in column 4 to a ‘‘no.’’ Section
63.7(e)(1) describes performance testing
requirements. The EPA is instead
proposing to add a performance testing
requirement at 40 CFR 63.5535. The
performance testing requirements we
are proposing to add differ from the
General Provisions performance testing
provisions in several respects. The
regulatory text does not include the
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language in 40 CFR 63.7(e)(1) that
restated the SSM exemption and
language that precluded startup and
shutdown periods from being
considered ‘‘representative’’ for
purposes of performance testing. The
proposed performance testing
provisions do not allow performance
testing during startup or shutdown. As
in 40 CFR 63.7(e)(1), performance tests
conducted under this subpart should
not be conducted during malfunctions
because conditions during malfunctions
are often not representative of normal
operating conditions. The EPA is
proposing to add language that requires
the owner or operator to record the
process information that is necessary to
document operating conditions during
the test and include in such record an
explanation to support that such
conditions represent normal operation.
Section 63.7(e) requires that the owner
or operator make available to the
Administrator such records ‘‘as may be
necessary to determine the condition of
the performance test’’ available to the
Administrator upon request but does
not specifically require the information
to be recorded. The regulatory text the
EPA is proposing to add to this
provision builds on that requirement
and makes explicit the requirement to
record the information.
e. Monitoring
We are proposing to revise the
General Provisions table (Table 10)
entries for 40 CFR 63.8(c)(1)(i) and (iii)
by changing the ‘‘yes’’ in column 4 to
a ‘‘no.’’ The cross-references to the
general duty and SSM plan
requirements in those subparagraphs are
not necessary in light of other
requirements of 40 CFR 63.8 that require
good air pollution control practices (40
CFR 63.8(c)(1)) and that set out the
requirements of a quality control
program for monitoring equipment (40
CFR 63.8(d)).
We are proposing to revise the
General Provisions table (Table 10) by
adding an entry for 40 CFR 63.8(d)(3)
and including a ‘‘no’’ in column 4. The
final sentence in 40 CFR 63.8(d)(3)
refers to the General Provisions’ SSM
plan requirement which is no longer
applicable. The EPA is proposing to add
to the rule at Table 9 that is identical to
40 CFR 63.8(d)(3) except that the final
sentence is replaced with the following
sentence: ‘‘The program of corrective
action should be included in the plan
required under § 63.8(d)(2).’’
f. Recordkeeping
We are proposing to revise the
General Provisions table (Table 10)
entry for 40 CFR 63.10(b)(2)(i) through
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(iv) by redesignating it as 40 CFR
63.10(b)(2)(i) and changing the ‘‘yes’’ in
column 4 to a ‘‘no.’’ Section
63.10(b)(2)(i) describes the
recordkeeping requirements during
startup and shutdown. We are instead
proposing to add recordkeeping
requirements to Table 9. When a source
is subject to a different standard during
startup and shutdown, it will be
important to know when such startup
and shutdown periods begin and end in
order to determine compliance with the
appropriate standard. Thus, the EPA is
proposing to add language to Table 9
requiring that sources subject to an
emission standard during startup or
shutdown that differs from the emission
standard that applies at all other times
must report the date, time, and duration
of such periods. The EPA is also
proposing that sources would be
required to record information
supporting the operating parameter
alternatives, including (1) an indication
that thermal oxidizers reach set point
temperature prior to emission unit
startup, and (2) an indication that
scrubbers are properly operating prior to
emission unit startup. The proposed
records are required to demonstrate that
alternative operating parameter limits
have been met during periods of startup
and shutdown.
We are proposing to revise the
General Provisions table (Table 10) by
adding an entry for 40 CFR
63.10(b)(2)(ii) and including a ‘‘no’’ in
column 4. Section 63.10(b)(2)(ii)
describes the recordkeeping
requirements during a malfunction. The
EPA is proposing to add such
requirements to Table 9. The regulatory
text we are proposing to add differs
from the General Provisions it is
replacing in that the General Provisions
requires the creation and retention of a
record of the occurrence and duration of
each malfunction of process, air
pollution control, and monitoring
equipment. The EPA is proposing that
this requirement apply to any failure to
meet an applicable standard and is
requiring that the source record the
date, time, and duration of the failure
rather than the ‘‘occurrence.’’ The EPA
is also proposing to add to Table 9 a
requirement that sources keep records
that include a list of the affected source
or equipment and actions taken to
minimize emissions, an estimate of the
quantity of each regulated pollutant
emitted over the standard for which the
source failed to meet the standard, and
a description of the method used to
estimate the emissions. Examples of
such methods would include productloss calculations, mass balance
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calculations, measurements when
available, or engineering judgment
based on known process parameters.
The EPA is proposing to require that
sources keep records of this information
to ensure that there is adequate
information to allow the EPA to
determine the severity of any failure to
meet a standard, and to provide data
that may document how the source met
the general duty to minimize emissions
when the source has failed to meet an
applicable standard.
We are proposing to revise the
General Provisions table (Table 10) by
adding an entry for 40 CFR
63.10(b)(2)(iv) and including a ‘‘no’’ in
column 4. When applicable, the
provision requires sources to record
actions taken during SSM events when
actions were inconsistent with their
SSM plan. The requirement is no longer
appropriate because SSM plans will no
longer be required. The requirement
previously applicable under 40 CFR
63.10(b)(2)(iv)(B) to record actions to
minimize emissions and record
corrective actions is now applicable by
reference to Table 9.
We are proposing to revise the
General Provisions table (Table 10) by
adding 40 CFR 63.10(b)(2)(v) to the
entry for 40 CFR 63.10(b)(2)(iv), which
includes a ‘‘no’’ in column 4. When
applicable, the provision requires
sources to record actions taken during
SSM events to show that actions taken
were consistent with their SSM plan.
The requirement is no longer
appropriate because SSM plans will no
longer be required.
We are proposing to revise the
General Provisions table (Table 10) by
adding an entry for 40 CFR 63.10(c)(15)
and including a ‘‘no’’ in column 4. The
EPA is proposing that 40 CFR
63.10(c)(15) no longer apply. When
applicable, the provision allows an
owner or operator to use the affected
source’s startup, shutdown, and
malfunction plan or records kept to
satisfy the recordkeeping requirements
of the startup, shutdown, and
malfunction plan, specified in 40 CFR
63.6(e), to also satisfy the requirements
of 40 CFR 63.10(c)(10) through (12). The
EPA is proposing to eliminate this
requirement because SSM plans would
no longer be required, and, therefore, 40
CFR 63.10(c)(15) no longer serves any
useful purpose for affected units.
g. Reporting
We are proposing to revise the
General Provisions table (Table 10)
entry for 40 CFR 63.10(d)(5) by
redesignating it as 40 CFR 63.10(d)(5)(i)
and changing the ‘‘yes’’ in column 4 to
a ‘‘no.’’ Section 63.10(d)(5)(i) describes
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the periodic reporting requirements for
startups, shutdowns, and malfunctions.
To replace the General Provisions
reporting requirement, the EPA is
proposing to add reporting requirements
to 40 CFR 63.5580 and Table 8. The
replacement language differs from the
General Provisions requirement in that
it eliminates periodic SSM reports as a
stand-alone report. We are proposing
language that requires sources that fail
to meet an applicable standard at any
time to report the information
concerning such events in the
semiannual compliance report already
required under this rule. We are
proposing that the report must contain
the number, date, time, duration, and
the cause of such events (including
unknown cause, if applicable), a list of
the affected source or equipment, an
estimate of the quantity of each
regulated pollutant emitted over any
emission limit, and a description of the
method used to estimate the emissions.
Examples of such methods would
include product-loss calculations, mass
balance calculations, measurements
when available, or engineering
judgment based on known process
parameters. The EPA is proposing this
requirement to ensure that there is
adequate information to determine
compliance, to allow the EPA to
determine the severity of the failure to
meet an applicable standard, and to
provide data that may document how
the source met the general duty to
minimize emissions during a failure to
meet an applicable standard.
We will no longer require owners or
operators to determine whether actions
taken to correct a malfunction are
consistent with an SSM plan, because
plans would no longer be required. The
proposed amendments, therefore,
eliminate the cross-reference to 40 CFR
63.10(d)(5)(i) that contains the
description of the previously required
SSM report format and submittal
schedule from this section. These
specifications are no longer necessary
because the events will be reported in
otherwise required reports with similar
format and submittal requirements.
We are proposing to revise the
General Provisions table (Table 10) by
adding an entry for 40 CFR
63.10(d)(5)(ii) and including a ‘‘no’’ in
column 4. Section 63.10(d)(5)(ii)
describes an immediate report for
startups, shutdown, and malfunctions
when a source failed to meet an
applicable standard but did not follow
the SSM plan. We will no longer require
owners and operators to report when
actions taken during a startup,
shutdown, or malfunction were not
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consistent with an SSM plan, because
plans would no longer be required.
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2. 5-Year Periodic Emissions Testing
As part of an ongoing effort to
improve compliance with various
federal air emission regulations, the
EPA reviewed the testing and
monitoring requirements of 40 CFR part
63, subpart UUUU and is proposing the
following change. The EPA is proposing
to require facilities that use nonrecovery control devices to conduct
periodic air emissions performance
testing, with the first of the periodic
performance tests to be conducted
within 3 years of the effective date of
the revised standards and thereafter no
longer than 5 years following the
previous test. Requiring periodic
performance tests would serve as a
check on the accuracy of facilities’ mass
balance calculations and on the
efficiency of the control devices used to
achieve compliance with the standards.
Periodic performance tests would
ensure that control devices are properly
maintained over time, thereby reducing
the potential for acute emissions
episodes. We specifically request
comment on the proposed repeat testing
requirements.
3. Electronic Reporting
Through this action, we are proposing
that owners and operators of cellulose
products manufacturing facilities
submit electronic copies of required
initial notifications, notifications of
compliance status, performance test
reports, performance evaluation reports,
and semiannual reports through the
EPA’s Central Data Exchange (CDX)
using the Compliance and Emissions
Data Reporting Interface (CEDRI). A
description of the electronic data
submission process is provided in the
memorandum, Electronic Reporting
Requirements for New Source
Performance Standards (NSPS) and
National Emission Standards for
Hazardous Air Pollutants (NESHAP)
Rules, available in Docket ID No. EPA–
HQ–OAR–2018–0415. The proposed
rule requires that performance test
results collected using test methods that
are supported by the EPA’s Electronic
Reporting Tool (ERT) as listed on the
ERT website 24 at the time of the test be
submitted in the format generated
through the use of the ERT and that
other performance test results be
submitted in portable document format
(PDF) using the attachment module of
the ERT. Similarly, performance
evaluation results of continuous
24 https://www.epa.gov/electronic-reporting-air-
emissions/electronic-reporting-tool-ert.
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monitoring systems measuring relative
accuracy test audit pollutants that are
supported by the ERT at the time of the
test must be submitted in the format
generated through the use of the ERT
and other performance evaluation
results be submitted in PDF using the
attachment module of the ERT.
For initial notifications and
notifications of compliance status, the
proposed rule requires that owners and
operators submit notifications as PDFs
to CEDRI. For semiannual reports, the
proposed rule requires that owners and
operators use the appropriate
spreadsheet template to submit
information to CEDRI. A draft version of
the proposed template for these reports
is included in the docket for this
rulemaking.25 The EPA specifically
requests comment on the content,
layout, and overall design of the
template.
The initial notifications, notifications
of compliance status, performance test
reports, performance evaluation reports,
and semiannual reports are required to
be submitted according to the deadlines
specified in 40 CFR 63.5580.
Additionally, the EPA has identified
two broad circumstances in which
electronic reporting extensions may be
provided. In both circumstances, the
decision to accept the claim of needing
additional time to report is within the
discretion of the Administrator, and
reporting should occur as soon as
possible. The EPA is providing these
potential extensions to protect owners
and operators from noncompliance in
cases where they cannot successfully
submit a report by the reporting
deadline for reasons outside of their
control. The situation where an
extension may be warranted due to
outages of the EPA’s CDX or CEDRI
which precludes an owner or operator
from accessing the system and
submitting required reports is addressed
in 40 CFR 63.5580. The situation where
an extension may be warranted due to
a force majeure event, which is defined
as an event that will be or has been
caused by circumstances beyond the
control of the affected facility, its
contractors, or any entity controlled by
the affected facility that prevents an
owner or operator from complying with
the requirement to submit a report
electronically as required by this rule is
addressed in 40 CFR 63.5580. Examples
of such events are acts of nature, acts of
war or terrorism, or equipment failure or
safety hazards beyond the control of the
facility.
25 See Subpart_UUUU_Semiannual_Report.xlsx,
available at Docket ID No. EPA–HQ–OAR–2018–
0415.
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The electronic submittal of the reports
addressed in this proposed rulemaking
will increase the usefulness of the data
contained in those reports, is in keeping
with current trends in data availability
and transparency, will further assist in
the protection of public health and the
environment, will improve compliance
by facilitating the ability of regulated
facilities to demonstrate compliance
with requirements and by facilitating
the ability of delegated state, local,
tribal, and territorial air agencies and
the EPA to assess and determine
compliance, and will ultimately reduce
burden on regulated facilities, delegated
air agencies, and the EPA. Electronic
reporting also eliminates paper-based,
manual processes, thereby saving time
and resources, simplifying data entry,
eliminating redundancies, minimizing
data reporting errors, and providing data
quickly and accurately to the affected
facilities, air agencies, the EPA, and the
public. Moreover, electronic reporting is
consistent with the EPA’s plan 26 to
implement Executive Order 13563 and
is in keeping with the EPA’s Agencywide policy 27 developed in response to
the White House’s Digital Government
Strategy.28 For more information on the
benefits of electronic reporting, see the
memorandum, Electronic Reporting
Requirements for New Source
Performance Standards (NSPS) and
National Emission Standards for
Hazardous Air Pollutants (NESHAP)
Rules, available in Docket ID No. EPA–
HQ–OAR–2018–0415.
4. Biofilter Effluent Conductivity
On November 17, 2006, Viskase
Companies, Inc., a company subject to
40 CFR part 63, subpart UUUU, which
manufactures cellulose food casings,
submitted a request to the EPA to
monitor biofilter effluent conductivity
as an alternative to effluent pH for the
biofilter control devices at their
facilities in Osceola, Arkansas, and
Loudon, Tennessee. The request stated
that pH is in a range such that effluent
conductivity would provide a more
accurate operating limit:
26 EPA’s Final Plan for Periodic Retrospective
Reviews, August 2011. Available at: https://
www.regulations.gov/document?D=EPA-HQ-OA2011-0156-0154.
27 E-Reporting Policy Statement for EPA
Regulations, September 2013. Available at: https://
www.epa.gov/sites/production/files/2016-03/
documents/epa-ereporting-policy-statement-201309-30.pdf.
28 Digital Government: Building a 21st Century
Platform to Better Serve the American People, May
2012. Available at: https://
obamawhitehouse.archives.gov/sites/default/files/
omb/egov/digital-government/digitalgovernment.html.
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For strong acids and bases, pH values are
not very meaningful indicators of the
concentration. The measurement uncertainty
is large because pH is a logarithmic scale.
Conductivity measurements are more
suitable than pH measurements for
producing accurate and reproducible
estimates of the concentrations of free acids
and bases because the relationship between
conductivity and concentration is almost
linear over a range of concentrations.
Based on the information provided by
Viskase, the EPA conditionally
approved the monitoring request to
establish and monitor an effluent
conductivity operating limit for the
biofilter units and stated that the
effluent conductivity operating limit
must be based on a performance test and
can be supplemented by engineering
assessments and/or manufacturer’s
recommendations.29
In addition to granting the alternative
monitoring request per 40 CFR 63.8(f),
the EPA is also proposing an
amendment to 40 CFR part 63, subpart
UUUU, to add biofilter effluent
conductivity as an alternative parameter
to pH. Specifically, the EPA is
proposing to revise the operating limits
table (Table 2 to Subpart UUUU of Part
63) to add biofilter effluent conductivity
to the list of biofilter operating limits,
revise the performance testing
requirements in 40 CFR 63.5535 to add
biofilter effluent conductivity to the list
of parameters for which operating limits
must be established during the
compliance demonstration, and revise
the continuous compliance with
operating limits table (Table 6 to
Subpart UUUU of Part 63) to add
biofilter effluent conductivity to the list
of parameters to monitor to demonstrate
continuous compliance.
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5. IBR Under 1 CFR Part 51
The EPA is proposing regulatory text
that includes IBR. In accordance with
requirements of 1 CFR 51.5, the EPA is
proposing to incorporate by reference
the following documents into 40 CFR
63.14:
• ASME PTC 19.10–1981, Flue and
Exhaust Gas Analyses—Part 10, was
previously approved for incorporation
by reference for Table 4 to Subpart
UUUU of Part 63.
• ASTM D6420–99 (Reapproved
2010), Standard Test Method for
Determination of Gaseous Organic
Compounds by Direct Interface Gas
Chromatography-Mass Spectrometry,
IBR approved for Table 4 to Subpart
UUUU of Part 63.
29 See Technology Review for the Cellulose
Products Manufacturing Source Category—
Proposed Rule, Appendix E, available in the docket.
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• ASTM D5790–95 (Reapproved
2012), Standard Test Method for
Measurement of Purgeable Organic
Compounds in Water by Capillary
Column Gas Chromatography/Mass
Spectrometry, IBR approved for Table 4
to Subpart UUUU of Part 63.
• ASTM D6348–12e1, Determination
of Gaseous Compounds by Extractive
Direct Interface Fourier Transform
Infrared (FTIR) Spectroscopy, IBR
approved for Table 4 to Subpart UUUU
of Part 63.
The EPA has made, and will continue
to make, these documents generally
available electronically through https://
www.regulations.gov/ and at the
appropriate EPA office (see the
ADDRESSES section of this preamble for
more information).
6. Technical and Editorial Changes
The following lists additional
proposed changes that address technical
and editorial corrections:
• Revise the requirements in 40 CFR
63.5505 to clarify that CS2 storage tanks
part of a submerged unloading and
storage operation subject to 40 CFR part
63, subpart UUUU, is not subject to 40
CFR part 60, subpart Kb. These types of
tanks are not the type of storage vessels
in terms of their physical siting and
operational design that were intended to
be regulated under NSPS Kb, even when
these tanks meet the vapor pressure and
designed capacity under the rule. These
tanks are completely submerged in a
common water bath and have no air
space within the tanks due to the
continuous water layer above the CS2
layer, therefore, the tanks do not have
direct CS2 gaseous emissions.
• Revise the performance test
requirements in 40 CFR 63.5535 to
specify the conditions for conducting
performance tests;
• Revise the performance test
requirements table (Table 4 to Subpart
UUUU of Part 63) to correct an error in
the reference to a test method appendix;
• Revise the performance test
requirements table (Table 4 to Subpart
UUUU of Part 63) to add IBR for ASTM
D6420–99 (Reapproved 2010), ASTM
D5790–95 (Reapproved 2012), and
ASTM D6348–12e1;
• Revise the reporting requirements
in 40 CFR 63.5580 and the reporting and
recordkeeping requirements tables
(Tables 8 and 9 to Subpart UUUU of
Part 63) to include the requirements to
record and report information on
failures to meet the applicable standard
and the corrective actions taken; and
• Revise the General Provisions
applicability table (Table 10 to Subpart
UUUU of Part 63) to align with those
sections of the General Provisions that
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have been amended or reserved over
time.
E. What compliance dates are we
proposing?
For the proposed rule revisions
related to the removal of the exemption
from the requirements to meet the
standard during SSM periods and the
additional electronic reporting
requirements, the EPA is proposing that
existing affected sources must comply
with the amendments in this
rulemaking no later than 180 days after
the effective date of the final rule. The
EPA is also proposing that affected
sources that commence construction or
reconstruction after September 9, 2019
must comply with all requirements of
the subpart, including the amendments
being proposed unless indicated
specifically otherwise, immediately
upon startup. All affected existing
facilities would have to continue to
meet the current requirements of 40 CFR
part 63, subpart UUUU, until the
applicable compliance date of the
amended rule. The final action is not
expected to be a ‘‘major rule’’ as defined
by 5 U.S.C. 804(2), so the effective date
of the final rule will be the
promulgation date as specified in CAA
section 112(d)(10).
For existing sources, we are proposing
two changes that would impact ongoing
compliance requirements for 40 CFR
part 63, subpart UUUU. As discussed
elsewhere in this preamble, we are
proposing to add a requirement that
initial notifications, notifications of
compliance status, performance test
results, and the semiannual reports
using the new template be submitted
electronically. We are also proposing to
change the requirements for SSM by
removing the exemption from the
requirements to meet the standard
during SSM periods and by removing
the requirement to develop and
implement an SSM plan.
Our experience with similar
industries that are required to convert
reporting mechanisms, install necessary
hardware, install necessary software,
become familiar with the process of
submitting performance test results
electronically through the EPA’s CEDRI,
test these new electronic submission
capabilities, reliably employ electronic
reporting, and convert logistics of
reporting processes to different timereporting parameters, shows that a time
period of a minimum of 90 days, and
more typically 180 days, is generally
necessary to successfully complete these
changes. Our experience with similar
industries further shows that this sort of
regulated facility generally requires a
time period of 180 days to read and
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understand the amended rule
requirements; evaluate their operations
to ensure that they can meet the
standards during periods of startup and
shutdown as defined in the rule and
make any necessary adjustments; adjust
parameter monitoring and recording
systems to accommodate revisions; and
update their operations to reflect the
revised requirements. The EPA
recognizes the confusion that multiple
different compliance dates for
individual requirements would create
and the additional burden such an
assortment of dates would impose. From
our assessment of the timeframe needed
for compliance with the entirety of the
revised requirements, the EPA considers
a period of 180 days to be the most
expeditious compliance period
practicable, and, thus, is proposing that
existing affected sources be in
compliance with all of this regulation’s
revised requirements within 180 days of
the regulation’s effective date. We solicit
comment on this proposed compliance
period, and we specifically request
submission of information from sources
in this source category regarding
specific actions that would need to be
undertaken to comply with the
proposed amended requirements and
the time needed to make the
adjustments for compliance with any of
the revised requirements. We note that
information provided may result in
changes to the proposed compliance
date.
Additionally, we are also proposing
new requirements to conduct periodic
performance testing every 5 years.
Establishing a compliance date earlier
than 3 years for the first periodic
performance test can cause scheduling
issues as affected sources compete for a
limited number of testing contractors.
Considering these scheduling issues, we
are proposing that each existing affected
source, and each new and reconstructed
affected source that commences
construction or reconstruction after
August 28, 2000, and on or before
September 9, 2019 and uses a nonrecovery control device to comply with
the standards, must conduct the first
periodic performance test on or before
[DATE 3 YEARS AFTER DATE OF
PUBLICATION OF FINAL RULE IN
THE Federal Register] and conduct
subsequent periodic performance tests
no later than 60 months thereafter
following the previous performance test.
For each new and reconstructed affected
source that commences construction or
reconstruction after September 9, 2019
and uses a non-recovery control device
to comply with the standards, we are
proposing that owners and operators
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must conduct the first periodic
performance test no later than 60
months following the initial
performance test required by 40 CFR
63.5535 and conduct subsequent
periodic performance tests no later than
60 months thereafter following the
previous performance test.
V. Summary of Cost, Environmental,
and Economic Impacts
A. What are the affected sources?
There are currently eight facilities
operating in the United States that
conduct MVP and CEP operations that
are subject to the Cellulose Products
Manufacturing NESHAP. The 40 CFR
part 63, subpart UUUU affected source
for the MVP source category is each
cellulose food casing, rayon, cellulosic
sponge, or cellophane operation, as
defined in 40 CFR 63.5610. The affected
source for the CEP source category is
each cellulose ether operation, as
defined in 40 CFR 63.5610.
B. What are the air quality impacts?
The EPA estimates that annual HAP
emissions from the MVP and CEP
facilities that are subject to the NESHAP
are approximately 4,300 tpy. Because
we are not proposing revisions to the
emission limits, we do not anticipate
any quantifiable air quality impacts as a
result of the proposed amendments.
However, we anticipate that the
proposed requirements, including the
removal of the SSM exemption and
addition of periodic emissions testing,
may reduce emissions by ensuring
proper operation of control devices.
C. What are the cost impacts?
The eight facilities that would be
subject to the proposed amendments
would incur minimal net costs to meet
revised recordkeeping and reporting
requirements and would incur periodic
emissions testing costs for add-on
control devices. The nationwide costs
associated with the proposed periodic
testing requirements are estimated to be
$490,000 (2018$) over the 5 years
following promulgation of the
amendments. For further information on
the requirement being proposed, see
section IV.D.2 of this preamble. For
further information on the costs
associated with the proposed
requirements, see the memorandum,
Costs and Environmental Impacts of
Regulatory Options for the Cellulose
Products Manufacturing Industry—
Proposed Rule, and the document,
Supporting Statement for the NESHAP
for Cellulose Products Manufacturing
(40 CFR part 63, subpart UUUU), which
are both available in the docket for this
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action. We solicit comment on these
estimated cost impacts.
D. What are the economic impacts?
Economic impact analyses focus on
changes in market prices and output
levels. If changes in market prices and
output levels in the primary markets are
significant enough, impacts on other
markets may also be examined. Both the
magnitude of costs associated with the
proposed requirements and the
distribution of these costs among
affected facilities can have a role in
determining how the market will change
in response to a proposed rule. Based on
the costs associated with the periodic
testing requirements, no significant
economic impacts from the proposed
amendments are anticipated.
E. What are the benefits?
Although the EPA does not anticipate
reductions in HAP emissions as a result
of the proposed amendments, we
believe that the action, if finalized as
proposed, would result in
improvements to the rule. Specifically,
the proposed amendments revise the
standards such that they apply at all
times. Additionally, the proposed
amendments requiring electronic
submittal of initial notifications,
performance test results, and
semiannual reports will increase the
usefulness of the data, is in keeping
with current trends of data availability,
will further assist in the protection of
public health and the environment, and
will ultimately result in less burden on
the regulated community. See section
IV.D.3 of this preamble for more
information.
VI. Request for Comments
We solicit comments on this proposed
action. In addition to general comments
on this proposed action, we are also
interested in additional data that may
improve the risk assessments and other
analyses. We are specifically interested
in receiving any improvements to the
data used in the site-specific emissions
profiles used for risk modeling. Such
data should include supporting
documentation in sufficient detail to
allow characterization of the quality and
representativeness of the data or
information. Section VII of this
preamble provides more information on
submitting data.
VII. Submitting Data Corrections
The site-specific emissions profiles
used in the source category risk and
demographic analyses and instructions
are available for download on the RTR
website at https://www.epa.gov/
stationary-sources-air-pollution/
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cellulose-products-manufacturingnational-emission-standards. The data
files include detailed information for
each HAP emissions release point for
the facilities in the source category.
If you believe that the data are not
representative or are inaccurate, please
identify the data in question, provide
your reason for concern, and provide
any ‘‘improved’’ data that you have, if
available. When you submit data, we
request that you provide documentation
of the basis for the revised values to
support your suggested changes. To
submit comments on the data
downloaded from the RTR website,
complete the following steps:
1. Within this downloaded file, enter
suggested revisions to the data fields
appropriate for that information.
2. Fill in the commenter information
fields for each suggested revision (i.e.,
commenter name, commenter
organization, commenter email address,
commenter phone number, and revision
comments).
3. Gather documentation for any
suggested emissions revisions (e.g.,
performance test reports, material
balance calculations).
4. Send the entire downloaded file
with suggested revisions in Microsoft®
Access format and all accompanying
documentation to Docket ID No. EPA–
HQ–OAR–2018–0415 (through the
method described in the ADDRESSES
section of this preamble).
5. If you are providing comments on
a single facility or multiple facilities,
you need only submit one file for all
facilities. The file should contain all
suggested changes for all sources at that
facility (or facilities). We request that all
data revision comments be submitted in
the form of updated Microsoft® Excel
files that are generated by the
Microsoft® Access file. These files are
provided on the RTR website at https://
www.epa.gov/stationary-sources-airpollution/cellulose-productsmanufacturing-national-emissionstandards.
VIII. Statutory and Executive Order
Reviews
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Additional information about these
statutes and Executive Orders can be
found at https://www.epa.gov/lawsregulations/laws-and-executive-orders.
A. Executive Order 12866: Regulatory
Planning and Review and Executive
Order 13563: Improving Regulation and
Regulatory Review
This action is not a significant
regulatory action and was, therefore, not
submitted to OMB for review.
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B. Executive Order 13771: Reducing
Regulation and Controlling Regulatory
Costs
This action is not expected to be an
Executive Order 13771 regulatory action
because this action is not significant
under Executive Order 12866.
C. Paperwork Reduction Act (PRA)
The information collection activities
in this proposed rule have been
submitted for approval to OMB under
the PRA. The Information Collection
Request (ICR) document that the EPA
prepared has been assigned EPA ICR
number 1974.09. You can find a copy of
the ICR in the docket for this rule, and
it is briefly summarized here.
The information requirements are
based on notification, recordkeeping,
and reporting requirements in the
NESHAP General Provisions (40 CFR
part 63, subpart A), which are essential
in determining compliance and
mandatory for all operators subject to
national emissions standards. These
recordkeeping and reporting
requirements are specifically authorized
by CAA section 114 (42 U.S.C. 7414).
All information submitted to the EPA
pursuant to the recordkeeping and
reporting requirements for which a
claim of confidentiality is made is
safeguarded according to Agency
policies set forth in 40 CFR part 2,
subpart B.
We are proposing changes to the
paperwork requirements for 40 CFR part
63, subpart UUUU, in the form of
eliminating the SSM reporting and SSM
plan requirements, adding periodic
emissions testing, providing biofilter
effluent conductivity as an alternative to
monitoring pH, and requiring electronic
submittal of notifications, semiannual
reports, and performance test reports.
Respondents/affected entities:
Respondents include facilities subject to
the NESHAP for Cellulose Products
Manufacturing (40 CFR part 63, subpart
UUUU).
Respondent’s obligation to respond:
Mandatory (40 CFR part 63, subpart
UUUU).
Estimated number of respondents:
Eight.
Frequency of response: The frequency
of responses varies depending on the
burden item. Responses include initial
notifications, reports of periodic
performance tests, and semiannual
compliance reports.
Total estimated burden: The annual
recordkeeping and reporting burden for
this information collection, averaged
over the first 3 years of this ICR, is
estimated to total 7,256 labor hours (per
year). Burden is defined at 5 CFR
1320.3(b).
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Total estimated cost: $954,000 per
year, including $834,000 per year in
labor costs and $120,000 per year in
annualized capital or operation and
maintenance costs.
An agency may not conduct or
sponsor, and a person is not required to
respond to, a collection of information
unless it displays a currently valid OMB
control number. The OMB control
numbers for the EPA’s regulations in 40
CFR are listed in 40 CFR part 9.
Submit your comments on the
Agency’s need for this information, the
accuracy of the provided burden
estimates, and any suggested methods
for minimizing respondent burden to
the EPA using the docket identified at
the beginning of this rule. You may also
send your ICR-related comments to
OMB’s Office of Information and
Regulatory Affairs via email to OIRA_
submission@omb.eop.gov, Attention:
Desk Officer for the EPA. Since OMB is
required to make a decision concerning
the ICR between 30 and 60 days after
receipt, OMB must receive comments no
later than October 9, 2019. The EPA will
respond to any ICR-related comments in
the final rule.
D. Regulatory Flexibility Act (RFA)
I certify that this action will not have
a significant economic impact on a
substantial number of small entities
under the RFA. No small entities are
subject to the requirements of this rule.
As such, this action will not impose any
requirements on small entities.
E. Unfunded Mandates Reform Act
(UMRA)
This action does not contain an
unfunded mandate of $100 million or
more as described in UMRA, 2 U.S.C.
1531–1538, and does not significantly or
uniquely affect small governments. The
action imposes no enforceable duty on
any state, local, or tribal governments or
the private sector.
F. Executive Order 13132: Federalism
This action does not have federalism
implications. It will not have substantial
direct effects on the states, on the
relationship between the national
government and the states, or on the
distribution of power and
responsibilities among the various
levels of government.
G. Executive Order 13175: Consultation
and Coordination With Indian Tribal
Governments
This action does not have tribal
implications as specified in Executive
Order 13175. It will not have substantial
direct effects on tribal governments, on
the relationship between the federal
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government and Indian tribes, or on the
distribution of power and
responsibilities between the federal
government and Indian tribes. No tribal
governments own facilities subject to
the NESHAP. Thus, Executive Order
13175 does not apply to this action.
H. Executive Order 13045: Protection of
Children From Environmental Health
Risks and Safety Risks
This action is not subject to Executive
Order 13045 because it is not
economically significant as defined in
Executive Order 12866, and because the
EPA does not believe the environmental
health or safety risks addressed by this
action present a disproportionate risk to
children. This action’s health and risk
assessments are contained in sections III
and IV of this preamble and further
documented in the following risk
reports titled Residual Risk Assessment
for the Miscellaneous Viscose Processes
Source Category in Support of the 2019
Risk and Technology Review Proposed
Rule and Residual Risk Assessment for
the Cellulose Ethers Production Source
Category in Support of the 2019 Risk
and Technology Review Proposed Rule,
which can be found in the docket for
this action.
I. Executive Order 13211: Actions
Concerning Regulations That
Significantly Affect Energy Supply,
Distribution, or Use
This action is not subject to Executive
Order 13211, because it is not a
significant regulatory action under
Executive Order 12866.
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J. National Technology Transfer and
Advancement Act (NTTAA) and 1 CFR
Part 51
This action involves technical
standards. The EPA proposes to use
ASTM D6420–99 (Reapproved 2010),
‘‘Standard Test Method for
Determination of Gaseous Organic
Compounds by Direct Interface Gas
Chromatography-Mass Spectrometry,’’
for the measurement of toluene and total
organic HAP. This method employs a
direct interface gas chromatograph/mass
spectrometer to identify and quantify
the 36 volatile organic compounds (or
sub-set of these compounds) listed on
the ASTM website. This ASTM has been
approved by the EPA as an alternative
to EPA Method 18 only when the target
compounds are all known and the target
compounds are all listed in ASTM
D6420 as measurable. This ASTM
should not be used for methane and
ethane because their atomic mass is less
than 35. ASTM D6420 should never be
specified as a total VOC method.
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The EPA also proposes to use ASTM
D5790–95 (Reapproved 2012),
‘‘Standard Test Method for
Measurement of Purgeable Organic
Compounds in Water by Capillary
Column Gas Chromatography/Mass
Spectrometry.’’ This method covers the
identification and simultaneous
measurement of purgeable volatile
organic compounds. It has been
validated for treated drinking water,
wastewater, and groundwater. ASTM
D5790–95 is acceptable as an alternative
to EPA Method 624 and for the analysis
of total organic HAP in wastewater
samples. For wastewater analyses, this
ASTM method should be used with the
sampling procedures of EPA Method
25D or an equivalent method in order to
be a complete alternative. The ASTM
standard is validated for all of the 21
volatile organic HAP (including toluene)
targeted by EPA Method 624, but it is
also validated for an additional 14 HAP
not targeted by the EPA method.
The EPA proposes to use ASTM
D6348–12e1, ‘‘Determination of Gaseous
Compounds by Extractive Direct
Interface Fourier Transform Infrared
(FTIR) Spectroscopy’’ as an acceptable
alternative to using EPA Method 320
with caveats requiring inclusion of
selected annexes to the standard as
mandatory. This test method provides
the volume concentration of detected
analytes. Converting the volume
concentration to a mass emission rate
using a particular compound’s
molecular weight, and the effluent
volumetric flow rate, temperature, and
pressure is useful for determining the
impact of that compound to the
atmosphere. When using ASTM D6348–
12e, the following conditions must be
met: (1) The test plan preparation and
implementation in the Annexes to
ASTM D 6348–03, Sections A1 through
A8 are mandatory; and (2) in ASTM
D6348–03, Annex A5 (Analyte Spiking
Technique), the percent recovery (%R)
must be determined for each target
analyte (Equation A5.5). In order for the
test data to be acceptable for a
compound, %R must be greater than or
equal to 70 percent and less than or
equal to 130 percent. If the %R value
does not meet this criterion for a target
compound, the test data are not
acceptable for that compound and the
test must be repeated for that analyte
(i.e., the sampling and/or analytical
procedure should be adjusted before a
retest). The %R value for each
compound must be reported in the test
report, and all field measurements must
be corrected with the calculated %R
value for that compound by using the
following equation: Reported Results =
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((Measured Concentration in the
Stack))/(%R) × 100.
The ASTM standards are reasonably
available from the American Society for
Testing and Materials (ASTM), 100 Barr
Harbor Drive, Post Office Box C700,
West Conshohocken, PA 19428–2959.
See https://www.astm.org/.
While the EPA has identified another
14 voluntary consensus standards (VCS)
as being potentially applicable to this
proposed rule, we have decided not to
use these VCS in this rulemaking. The
use of these VCS would not be practical
due to lack of equivalency,
documentation, validation date, and
other important technical and policy
considerations. See the memorandum
titled Voluntary Consensus Standard
Results for National Emission Standards
for Hazardous Air Pollutants for
Cellulose Products Manufacturing, in
the docket for this proposed rule for the
reasons for these determinations.
Under 40 CFR 63.7(f) and 40 CFR
63.8(f) of subpart A of the General
Provisions, a source may apply to the
EPA for permission to use alternative
test methods or alternative monitoring
requirements in place of any required
testing methods, performance
specifications, or procedures in the final
rule or any amendments.
The EPA welcomes comments on this
aspect of the proposed rulemaking and,
specifically, invites the public to
identify potentially applicable VCS and
to explain why such standards should
be used in this regulation.
K. Executive Order 12898: Federal
Actions To Address Environmental
Justice in Minority Populations and
Low-Income Populations
The EPA believes that this action does
not have disproportionately high and
adverse human health or environmental
effects on minority populations, lowincome populations, and/or indigenous
peoples, as specified in Executive Order
12898 (59 FR 7629, February 16, 1994).
The documentation for this decision
is contained in section IV.A.3 of this
preamble and the technical reports
titled Risk and Technology Review—
Analysis of Demographic Factors for
Populations Living Near Miscellaneous
Viscose Processes Facilities and Risk
and Technology Review—Analysis of
Demographic Factors for Populations
Living Near Cellulose Ethers Production
Facilities, which are located in the
public docket for this action.
List of Subjects in 40 CFR Part 63
Environmental protection,
Administrative practice and procedure,
Air pollution control, Hazardous
substances, Incorporation by reference,
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Intergovernmental relations, Reporting
and recordkeeping requirements.
Andrew R. Wheeler,
Administrator.
For the reasons set forth in the
preamble, the EPA proposes to amend
40 CFR part 63 as follows:
PART 63—NATIONAL EMISSION
STANDARDS FOR HAZARDOUS AIR
POLLUTANTS FOR SOURCE
CATEGORIES
1. The authority citation for part 63
continues to read as follows:
■
§ 63.5515 What are my general
requirements for complying with this
subpart?
Authority: 42 U.S.C. 7401 et seq.
Subpart A—[Amended]
2. Section 63.14 is amended by
revising paragraphs (h)(72), (85), (89),
and (91) to read as follows:
■
§ 63.14
Incorporations by reference.
*
*
*
*
(h) * * *
(72) ASTM D5790–95 (Reapproved
2012), Standard Test Method for
Measurement of Purgeable Organic
Compounds in Water by Capillary
Column Gas Chromatography/Mass
Spectrometry, IBR approved for Table 4
to subpart UUUU.
*
*
*
*
*
(85) ASTM D6348–12e1,
Determination of Gaseous Compounds
by Extractive Direct Interface Fourier
Transform Infrared (FTIR) Spectroscopy,
Approved February 1, 2012, IBR
approved for § 63.1571(a) and Table 4 to
subpart UUUU.
*
*
*
*
*
(89) ASTM D6420–99, Standard Test
Method for Determination of Gaseous
Organic Compounds by Direct Interface
Gas Chromatography-Mass
Spectrometry, IBR approved for
§§ 63.5799 and 63.5850.
*
*
*
*
*
(91) ASTM D6420–99 (Reapproved
2010), Standard Test Method for
Determination of Gaseous Organic
Compounds by Direct Interface Gas
Chromatography-Mass Spectrometry,
Approved October 1, 2010, IBR
approved for § 63.670(j), Table 4 to
subpart UUUU, and appendix A to this
part: Method 325B.
*
*
*
*
*
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*
Subpart UUUU—[Amended]
3. Section 63.5505 is amended by
adding paragraph (f) to read as follows:
■
§ 63.5505 What emission limits, operating
limits, and work practice standards must I
meet?
*
*
*
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*
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(f) Carbon disulfide storage tanks part
of a submerged unloading and storage
operation subject to this part are not
subject to 40 CFR part 60, subpart Kb
(Standards of Performance for Volatile
Organic Liquid Storage Vessels
(Including Petroleum Liquid Storage
Vessels) for Which Construction,
Reconstruction, or Modification
Commenced After July 23, 1984).
■ 4. Section 63.5515 is amended by
revising paragraph (a), paragraph (b)
introductory text, adding and reserving
paragraph (b)(2), and revising paragraph
(c) to read as follows:
(a) Before [DATE 181 DAYS AFTER
PUBLICATION OF FINAL RULE IN
THE Federal Register], for each existing
source, and for each new or
reconstructed source for which
construction or reconstruction
commenced after June 11, 2002, but on
or before September 9, 2019, you must
be in compliance with the emission
limits, operating limits, and work
practice standards in this subpart at all
times, except during periods of startup,
shutdown, and malfunction. After
[DATE 180 DAYS AFTER
PUBLICATION OF FINAL RULE IN
THE Federal Register], for each such
source you must be in compliance with
the emission limitations in this subpart
at all times. For new and reconstructed
sources for which construction or
reconstruction commenced after
September 9, 2019, you must be in
compliance with the emission limits,
operating limits, and work practice
standards in this subpart at all times.
(b) Before [DATE 181 DAYS AFTER
PUBLICATION OF FINAL RULE IN
THE Federal Register], for each existing
source, and for each new or
reconstructed source for which
construction or reconstruction
commenced after June 11, 2002, but on
or before September 9, 2019, you must
always operate and maintain your
affected source, including air pollution
control and monitoring equipment,
according to the provisions in
§ 63.6(e)(1)(i). After [DATE 180 DAYS
AFTER PUBLICATION OF FINAL RULE
IN THE Federal Register] for each such
source, and after September 9, 2019 for
new and reconstructed sources for
which construction or reconstruction
commenced after September 9, 2019,
you must always operate and maintain
your affected source, including air
pollution control and monitoring
equipment in a manner consistent with
good air pollution control practices for
minimizing emissions at least to the
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levels required by this subpart. The
general duty to minimize emissions
does not require you to make any
further efforts to reduce emissions if
levels required by the applicable
standard have been achieved.
Determination of whether a source is
operating in compliance with operation
and maintenance requirements will be
based on information available to the
Administrator which may include, but
is not limited to, monitoring results,
review of operation and maintenance
procedures, review of operation and
maintenance records, and inspection of
the source.
*
*
*
*
*
(c) Before [DATE 181 DAYS AFTER
PUBLICATION OF FINAL RULE IN
THE Federal Register], for each existing
source, and for each new or
reconstructed source for which
construction or reconstruction
commenced after June 11, 2002, but on
or before September 9, 2019, you must
maintain a written startup, shutdown,
and malfunction (SSM) plan according
the provisions in § 63.6(e)(3). For each
such source, a startup, shutdown, and
malfunction plan is not required after
[DATE 180 DAYS AFTER
PUBLICATION OF FINAL RULE IN
THE Federal Register]. No startup,
shutdown, and malfunction plan is
required for any new or reconstruction
source for which construction or
reconstruction commenced after
September 9, 2019.
*
*
*
*
*
■ 5. Section 63.5535 is amended by
revising paragraph (b), removing and
reserving paragraph (c), revising
paragraphs (g)(1), (h)(1), and (i)(7) to
read as follows:
§ 63.5535 What performance tests and
other procedures must I use?
*
*
*
*
*
(b) You must conduct each
performance test for continuous process
vents and combinations of batch and
continuous process vents based on
representative performance (i.e.,
performance based on normal operating
conditions) of the affected source for the
period being tested, according to the
specific conditions in Table 4 to this
Subpart UUUU. Representative
conditions exclude periods of startup
and shutdown. You may not conduct
performance tests during periods of
malfunction. You must record the
process information that is necessary to
document operating conditions during
the test and include in such record an
explanation to support that such
conditions represent normal operation.
Upon request, you shall make available
to the Administrator such records as
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may be necessary to determine the
conditions of performance tests.
*
*
*
*
*
(g) * * *
(1) Viscose process affected sources
that must use non-recovery control
devices to meet the applicable emission
limit in table 1 to this subpart must
conduct an initial performance test of
their non-recovery control devices
according to the requirements in table 4
to this subpart to determine the control
efficiency of their non-recovery control
devices and incorporate this
information in their material balance.
Periodic performance tests must be
conducted as specified in § 63.5541.
*
*
*
*
*
(h) * * *
(1) Cellulose ether affected sources
that must use non-recovery control
devices to meet the applicable emission
limit in table 1 to this subpart must
conduct an initial performance test of
their non-recovery control devices
according to the requirements in table 4
to this subpart to determine the control
efficiency of their non-recovery control
devices and incorporate this
information in their material balance.
Periodic performance tests must be
conducted as specified in § 63.5541.
*
*
*
*
*
(i) * * *
(7) For biofilters, record the pressure
drop across the biofilter beds, inlet gas
temperature, and effluent pH or
conductivity averaged over the same
time period as the compliance
demonstration while the vent stream is
routed and constituted normally. Locate
the pressure, temperature, and pH or
conductivity sensors in positions that
provide representative measurement of
these parameters. Ensure the sample is
properly mixed and representative of
the fluid to be measured.
*
*
*
*
*
■ 6. Section 63.5541 is added to read as
follows:
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§ 63.5541 When must I conduct
subsequent performance tests?
(a) For each affected source utilizing
a non-recovery control device to comply
with § 63.5515 constructed or
reconstructed before September 9, 2019,
a periodic performance test must be
performed by [DATE 3 YEARS AFTER
DATE OF PUBLICATION IN THE
Federal Register], and subsequent tests
no later than 60 months thereafter.
(b) For each affected source utilizing
a non-recovery control device to comply
with § 63.5515 that commences
construction or reconstruction after
September 9, 2019, a periodic
performance test must be performed no
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later than 60 months after the initial
performance test required by § 63.5535,
and subsequent tests no later than 60
months thereafter.
■ 7. Section 63.5545 is amended by
revising paragraphs (b)(1) and (e)(2) to
read as follows:
§ 63.5545 What are my monitoring
installation, operation, and maintenance
requirements?
*
*
*
*
*
(b) * * *
(1) Ongoing operation and
maintenance procedures in accordance
with the general requirements of
§§ 63.8(c)(3) and (4)(ii), and 63.5515(b),
and 63.5580(c)(6);
*
*
*
*
*
(e) * * *
(2) You must conduct a performance
evaluation of each CEMS according to
the requirements in § 63.8, Procedure 1
of 40 CFR part 60, appendix F, and
according to the applicable performance
specification listed in paragraphs
(e)(1)(i) through (iv) of this section.
*
*
*
*
*
■ 8. Section 63.5555 is amended by
revising paragraph (d) to read as
follows:
§ 63.5555 How do I demonstrate
continuous compliance with the emission
limits, operating limits, and work practice
standards?
*
*
*
*
*
(d) Deviations that occur during a
period of startup, shutdown, or
malfunction are not violations if you
demonstrate to the Administrator’s
satisfaction that you were operating in
accordance with § 63.5515(b). The
Administrator will determine whether
deviations that occur during a period
you identify as a startup, shutdown, or
malfunction are violations, according to
the provisions in § 63.5515(b).
■ 9. Section 63.5575 is revised to read
as follows:
§ 63.5575 What notifications must I submit
and when?
You must submit each notification in
Table 7 to this subpart that applies to
you by the date specified in Table 7 to
this subpart. Initial notifications and
Notification of Compliance Status
Reports shall be electronically
submitted in portable document format
(PDF) following the procedure specified
in § 63.5580(g).
■ 10. Section 63.5580 is amended by:
■ a. Revising paragraph (b) introductory
text;
■ b. Adding paragraph (b)(6);
■ c. Revising paragraph (c)(4);
■ d. Revising paragraph (e) introductory
text and paragraph (e)(2);
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e. Adding paragraph (e)(14); and
f. Adding paragraphs (g) through (k).
The revisions and additions read as
follows:
■
■
§ 63.5580
when?
What reports must I submit and
*
*
*
*
*
(b) Unless the Administrator has
approved a different schedule for
submitting reports under § 63.10, you
must submit each compliance report by
the date in Table 8 to this subpart and
according to the requirements in
paragraphs (b)(1) through (6) of this
section.
*
*
*
*
*
(6) Beginning on [DATE 180 DAYS
AFTER DATE OF PUBLICATION OF
FINAL RULE IN THE Federal Register],
submit all subsequent reports following
the procedure specified in paragraph (g)
of this section.
*
*
*
*
*
(c) * * *
(4) Before [DATE 181 DAYS AFTER
PUBLICATION OF FINAL RULE IN
THE Federal Register], for each existing
source, and for each new or
reconstructed source for which
construction or reconstruction
commenced after June 11, 2002, but on
or before September 9, 2019, if you had
a startup, shutdown, or malfunction
during the reporting period and you
took actions consistent with your
startup, shutdown, and malfunction
plan, the compliance report must
include the information in
§ 63.10(d)(5)(i). No startup, shutdown,
and malfunction plan is required for any
new or reconstruction source for which
construction or reconstruction
commenced after September 9, 2019.
After [DATE 180 DAYS AFTER
PUBLICATION OF FINAL RULE IN
THE Federal Register], this section is no
longer relevant.
*
*
*
*
*
(e) For each deviation from an
emission limit or operating limit
occurring at an affected source where
you are using a CMS to demonstrate
continuous compliance with the
emission limit or operating limit in this
subpart (see Tables 5 and 6 to this
subpart), you must include the
information in paragraphs (c)(1) through
(4) and (e)(1) through (14) of this
section. This includes periods of
startup, shutdown, and malfunction.
*
*
*
*
*
(2) The date, time, and duration that
each CMS was inoperative, except for
zero (low-level) and high-level checks.
*
*
*
*
*
(14) An estimate of the quantity of
each regulated pollutant emitted over
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any emission limit, and a description of
the method used to estimate the
emissions.
*
*
*
*
*
(g) Submitting notifications or reports
electronically. If you are required to
submit notifications or reports following
the procedure specified in this
paragraph, you must submit
notifications or reports to the EPA via
the Compliance and Emissions Data
Reporting Interface (CEDRI), which can
be accessed through the EPA’s Central
Data Exchange (CDX) (https://
cdx.epa.gov/). Notifications must be
submitted as PDFs to CEDRI. You must
use the semi-annual compliance report
template on the CEDRI website (https://
www.epa.gov/electronic-reporting-airemissions/compliance-and-emissionsdata-reporting-interface-cedri) for this
subpart. The date report templates
become available will be listed on the
CEDRI website. The semi-annual
compliance report must be submitted by
the deadline specified in this subpart,
regardless of the method in which the
report is submitted. If you claim some
of the information required to be
submitted via CEDRI is confidential
business information (CBI), submit a
complete report, including information
claimed to be CBI, to the EPA. The
report must be generated using the
appropriate form on the CEDRI website.
Submit the file on a compact disc, flash
drive, or other commonly used
electronic storage medium and clearly
mark the medium as CBI. Mail the
electronic medium to U.S. EPA/OAQPS/
CORE CBI Office, Attention: Group
Leader, Measurement Policy Group, MD
C404–02, 4930 Old Page Rd., Durham,
NC 27703. The same file with the CBI
omitted must be submitted to EPA via
EPA’s CDX as described earlier in this
paragraph.
(h) Performance tests. Within 60 days
after the date of completing each
performance test required by this
subpart, you must submit the results of
the performance test following the
procedures specified in paragraphs
(h)(1) through (3) of this section.
(1) Data collected using test methods
supported by the EPA’s Electronic
Reporting Tool (ERT) as listed on the
EPA’s ERT website (https://
www.epa.gov/electronic-reporting-airemissions/electronic-reporting-tool-ert)
at the time of the test. Submit the results
of the performance test to the EPA via
CEDRI, which can be accessed through
the EPA’s CDX (https://cdx.epa.gov/).
The data must be submitted in a file
format generated through the use of the
EPA’s ERT. Alternatively, you may
submit an electronic file consistent with
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the extensible markup language (XML)
schema listed on the EPA’s ERT
website.
(2) Data collected using test methods
that are not supported by EPA’s ERT as
listed on the EPA’s ERT website at the
time of the test. The results of the
performance test must be included as an
attachment in the ERT or an alternate
electronic file consistent with the XML
schema listed on the EPA’s ERT
website. Submit the ERT generated
package or alternative file to the EPA via
CEDRI.
(3) Confidential business information
(CBI). If you claim some of the
information submitted under paragraph
(h) of this section is CBI, you must
submit a complete file, including
information claimed to be CBI, to the
EPA. The file must be generated through
the use of the EPA’s ERT or an alternate
electronic file consistent with the XML
schema listed on the EPA’s ERT
website. Submit the file on a compact
disc, flash drive, or other commonly
used electronic storage medium and
clearly mark the medium as CBI. Mail
the electronic medium to U.S. EPA/
OAQPS/CORE CBI Office, Attention:
Group Leader, Measurement Policy
Group, MD C404–02, 4930 Old Page Rd.,
Durham, NC 27703. The same file with
the CBI omitted must be submitted to
EPA via EPA’s CDX as described in
paragraph (h) of this section.
(i) Performance evaluations. Within
60 days after the date of completing
each continuous monitoring system
(CMS) performance evaluation (as
defined in § 63.2), you must submit the
results of the performance evaluation
following the procedures specified in
paragraphs (i)(1) through (3) of this
section.
(1) Performance evaluations of CMS
measuring relative accuracy test audit
(RATA) pollutants that are supported by
the EPA’s ERT as listed on the EPA’s
ERT website at the time of the
evaluation. Submit the results of the
performance evaluation to the EPA via
CEDRI, which can be accessed through
the EPA’s CDX. The data must be
submitted in a file format generated
through the use of the EPA’s ERT.
Alternatively, you may submit an
electronic file consistent with the XML
schema listed on the EPA’s ERT
website.
(2) Performance evaluations of CMS
measuring RATA pollutants that are not
supported by the EPA’s ERT as listed on
the EPA’s ERT website at the time of the
evaluation. The results of the
performance evaluation must be
included as an attachment in the ERT or
an alternate electronic file consistent
with the XML schema listed on the
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47377
EPA’s ERT website. Submit the ERT
generated package or alternative file to
the EPA via CEDRI.
(3) Confidential business information
(CBI). If you claim some of the
information submitted under this
paragraph (i) is CBI, you must submit a
complete file, including information
claimed to be CBI, to the EPA. The file
must be generated through the use of the
EPA’s ERT or an alternate electronic file
consistent with the XML schema listed
on the EPA’s ERT website. Submit the
file on a compact disc, flash drive, or
other commonly used electronic storage
medium and clearly mark the medium
as CBI. Mail the electronic medium to
U.S. EPA/OAQPS/CORE CBI Office,
Attention: Group Leader, Measurement
Policy Group, MD C404–02, 4930 Old
Page Rd., Durham, NC 27703. The same
file with the CBI omitted must be
submitted to the EPA via the EPA’s CDX
as described in this paragraph (i).
(j) Claims of EPA system outage. If
you are required to electronically
submit a report or notification through
CEDRI in the EPA’s CDX, you may
assert a claim of EPA system outage for
failure to timely comply with the
reporting requirement. To assert a claim
of EPA system outage, you must meet
the requirements outlined in paragraphs
(j)(1) through (7) of this section.
(1) You must have been or will be
precluded from accessing CEDRI and
submitting a required report within the
time prescribed due to an outage of
either the EPA’s CEDRI or CDX systems.
(2) The outage must have occurred
within the period of time beginning 5
business days prior to the date that the
submission is due.
(3) The outage may be planned or
unplanned.
(4) You must submit notification to
the Administrator in writing as soon as
possible following the date you first
knew, or through due diligence should
have known, that the event may cause
or has caused a delay in reporting.
(5) You must provide to the
Administrator a written description
identifying:
(i) The date(s) and time(s) when CDX
or CEDRI was accessed and the system
was unavailable;
(ii) A rationale for attributing the
delay in reporting beyond the regulatory
deadline to EPA system outage;
(iii) Measures taken or to be taken to
minimize the delay in reporting; and
(iv) The date by which you propose to
report, or if you have already met the
reporting requirement at the time of the
notification, the date you reported.
(6) The decision to accept the claim
of EPA system outage and allow an
extension to the reporting deadline is
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solely within the discretion of the
Administrator.
(7) In any circumstance, the report
must be submitted electronically as
soon as possible after the outage is
resolved.
(k) Claims of force majeure. If you are
required to electronically submit a
report through CEDRI in the EPA’s CDX,
you may assert a claim of force majeure
for failure to timely comply with the
reporting requirement. To assert a claim
of force majuere, you must meet the
requirements outlined in paragraphs
(k)(1) through (5) of this section.
(1) You may submit a claim if a force
majeure event is about to occur, occurs,
or has occurred or there are lingering
effects from such an event within the
period of time beginning five business
days prior to the date the submission is
due. For the purposes of this section, a
force majeure event is defined as an
event that will be or has been caused by
circumstances beyond the control of the
affected facility, its contractors, or any
entity controlled by the affected facility
that prevents you from complying with
the requirement to submit a report
electronically within the time period
within the discretion of the
Administrator.
(5) In any circumstance, the reporting
must occur as soon as possible after the
force majeure event occurs.
■ 11. Section 63.5590 is amended by
adding paragraph (e) to read as follows:
§ 63.5590 In what form and how long must
I keep my records?
*
*
*
*
*
(e) Any records required to be
maintained by this part that are
submitted electronically via EPA’s
CEDRI may be maintained in electronic
format. This ability to maintain
electronic copies does not affect the
requirement for facilities to make
records, data, and reports available
upon request to a delegated air agency
or EPA as part of an on-site compliance
evaluation.
■ 12. Table 2 to Subpart UUUU is
revised to read as follows:
Table 2 to Subpart UUUU of Part 63—
Operating Limits
As required in § 63.5505(b), you must
meet the appropriate operating limits in
the following table:
For the following control technique
. . .
you must . . .
1. condenser ...................................
maintain the daily average condenser outlet gas or condensed liquid temperature no higher than the value
established during the compliance demonstration.
a. for periods of normal operation, maintain the daily average thermal oxidizer firebox temperature no
lower than the value established during the compliance demonstration
b. after [DATE 180 DAYS AFTER DATE OF PUBLICATION OF FINAL RULE IN THE FEDERAL REGISTER] for existing sources and new or reconstructed sources for which construction or reconstruction
commenced after June 11, 2002, but on or before September 9, 2019, and immediately upon startup for
new or reconstructed sources for which construction or reconstruction commenced after September 9,
2019, maintain documentation for periods of startup demonstrating that the oxidizer was properly operating (e.g., firebox temperature had reached the setpoint temperature) prior to emission unit startup.
a. for periods of normal operation, maintain the daily average scrubber pressure drop and scrubber liquid
flow rate within the range of values established during the compliance demonstration;
b. after [DATE 180 DAYS AFTER DATE OF PUBLICATION OF FINAL RULE IN THE FEDERAL REGISTER] for existing sources and new or reconstructed sources for which construction or reconstruction
commenced after June 11, 2002, but on or before September 9, 2019], and immediately upon startup for
new or reconstructed sources for which construction or reconstruction commenced after September 9,
2019, maintain documentation for periods of startup and shutdown to confirm that the scrubber is operating properly prior to emission unit startup and continues to operate properly until emission unit shutdown is complete. Appropriate startup and shutdown operating parameters may be based on equipment
design, manufacturer’s recommendations, or other site-specific operating values established for normal
operating periods.
a. for periods of normal operation, maintain the daily average scrubber pressure drop, scrubber liquid flow
rate, and scrubber liquid pH, conductivity, or alkalinity within the range of values established during the
compliance demonstration;
b. after [DATE 180 DAYS AFTER DATE OF PUBLICATION OF FINAL RULE IN THE FEDERAL REGISTER] for existing sources and new or reconstructed sources for which construction or reconstruction
commenced after June 11, 2002, but on or before September 9, 2019, and immediately upon startup for
new or reconstructed sources for which construction or reconstruction commenced after September 9,
2019, maintain documentation for periods of startup and shutdown to confirm that the scrubber is operating properly prior to emission unit startup and continues to operate properly until emission unit shutdown is complete. Appropriate startup and shutdown operating parameters may be based on equipment
design, manufacturer’s recommendations, or other site-specific operating values established for normal
operating periods.
maintain the presence of a pilot flame.
maintain the daily average biofilter inlet gas temperature, biofilter effluent pH or conductivity, and pressure
drop within the operating values established during the compliance demonstration.
2. thermal oxidizer ..........................
3. water scrubber ............................
4. caustic scrubber ..........................
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prescribed. Examples of such events are
acts of nature (e.g., hurricanes,
earthquakes, or floods), acts of war or
terrorism, or equipment failure or safety
hazard beyond the control of the
affected facility (e.g., large scale power
outage).
(2) You must submit notification to
the Administrator in writing as soon as
possible following the date you first
knew, or through due diligence should
have known, that the event may cause
or has caused a delay in reporting.
(3) You must provide to the
Administrator:
(i) A written description of the force
majeure event;
(ii) A rationale for attributing the
delay in reporting beyond the regulatory
deadline to the force majeure event;
(iii) Measures taken or to be taken to
minimize the delay in reporting; and
(iv) The date by which you propose to
report, or if you have already met the
reporting requirement at the time of the
notification, the date you reported.
(4) The decision to accept the claim
of force majeure and allow an extension
to the reporting deadline is solely
5. flare .............................................
6. biofilter ........................................
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Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
For the following control technique
. . .
you must . . .
7. carbon absorber ..........................
maintain the regeneration frequency, total regeneration adsorber stream mass or volumetric flow during
carbon bed regeneration, and temperature of the carbon bed after regeneration (and within 15 minutes
of completing any cooling cycle(s)) for each regeneration cycle within the values established during the
compliance demonstration.
maintain the daily average absorption liquid flow, absorption liquid temperature, and steam flow within the
values established during the compliance demonstration.
if using a CEMS, maintain the daily average control efficiency of each control device no lower than the
value established during the compliance demonstration.
a. if you wish to establish alternative operating parameters, submit the application for approval of the alternative operating parameters no later than the notification of the performance test or CEMS performance
evaluation or no later than 60 days prior to any other initial compliance demonstration;
b. the application must include: Information justifying the request for alternative operating parameters (such
as the infeasibility or impracticality of using the operating parameters in this final rule); a description of
the proposed alternative control device operating parameters; the monitoring approach; the frequency of
measuring and recording the alternative parameters; how the operating limits are to be calculated; and
information documenting that the alternative operating parameters would provide equivalent or better assurance of compliance with the standard;
c. install, operate, and maintain the alternative parameter monitoring systems in accordance with the application approved by the Administrator;
d. establish operating limits during the initial compliance demonstration based on the alternative operating
parameters included in the approved application; and
e. maintain the daily average alternative operating parameter values within the values established during
the compliance demonstration.
a. submit for approval no later than the notification of the performance test or CEMS performance evaluation or no later than 60 days prior to any other initial compliance demonstration a proposed site-specific
plan that includes: A description of the alternative control device; test results verifying the performance
of the control device; the appropriate operating parameters that will be monitored; and the frequency of
measuring and recording to establish continuous compliance with the operating limits;
b. install, operate, and maintain the parameter monitoring system for the alternative control device in accordance with the plan approved by the Administrator;
c. establish operating limits during the initial compliance demonstration based on the operating parameters
for the alternative control device included in the approved plan; and
d. maintain the daily average operating parameter values for the alternative control technique within the
values established during the compliance demonstration.
8. oil absorber .................................
9. any of the control techniques
specified in this table.
10. any of the control techniques
specified in this table.
11. alternative control technique .....
13. Table 3 to Subpart UUUU is
revised to read as follows:
Table 3 to Subpart UUUU of Part 63—
Initial Compliance With Emission
Limits and Work Practice Standards
■
As required in §§ 63.5530(a) and
63.5535(g) and (h), you must
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demonstrate initial compliance with the
appropriate emission limits and work
practice standards according to the
requirements in the following table:
For . . .
at . . .
for the following emission limit or
work practice standard . . .
you have demonstrated initial
compliance if . . .
1. the sum of all viscose process
vents.
a. each existing cellulose food
casing operation.
i. reduce total uncontrolled sulfide
emissions (reported as carbon
disulfide) by at least 25% based
on a 6-month rolling average;
ii. for each vent stream that you
control using a control device,
route the vent stream through a
closed-vent system to the control device; and
iii. comply with the work practice
standard for closed-vent systems.
(1) reduce total uncontrolled sulfide emissions (reported as carbon disulfide) by at least 25%
based on a 6-month rolling average;
(2) for each vent stream that you
control using a control device,
route the vent stream through a
closed-vent system to the control device; and
(3) comply with the work practice
standard for closed-vent systems.
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Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
For . . .
at . . .
for the following emission limit or
work practice standard . . .
you have demonstrated initial
compliance if . . .
b. each new cellulose food casing
operation.
i. reduce total uncontrolled sulfide
emissions (reported as carbon
disulfide) by at least 75% based
on a 6-month rolling average;
ii. for each vent stream that you
control using a control device,
route the vent stream through a
closed-vent system to the control device; and
iii. comply with the work practice
standard for closed-vent systems.
c. each existing rayon operation ..
i. reduce total uncontrolled sulfide
emissions (reported as carbon
disulfide) by at least 35% within
3 years after the effective date
based on a 6-month rolling average; for each vent stream
that you control using a control
device, route the vent stream
through a closed-vent system to
the control device; and comply
with the work practice standard
for closed-vent systems; and
(1) the average uncontrolled total
sulfide emissions, determined
during the month-long compliance demonstration or using
engineering assessments, are
reduced by at least 75%;
(2) you have a record of the
range of operating parameter
values over the month-long
compliance demonstration during which the average uncontrolled total sulfide emissions
were reduced by at least 75%;
(3) you prepare a material balance that includes the pertinent
data used to determine the percent reduction of total sulfide
emissions; and
(4) you comply with the initial
compliance requirements for
closed-vent systems.
(1) the average uncontrolled total
sulfide emissions, determined
during the month-long compliance demonstration or using
engineering assessments, are
reduced by at least 35% within
3 years after the effective date;
(2) you have a record of the average operating parameter values
over the month-long compliance
demonstration during which the
average uncontrolled total sulfide emissions were reduced by
at least 35%;
(3) you prepare a material balance that includes the pertinent
data used to determine the percent reduction of total sulfide
emissions; and
(4) you comply with the initial
compliance requirements for
closed-vent systems; and
(1) the average uncontrolled total
sulfide emissions, determined
during the month-long compliance demonstration or using
engineering assessments, are
reduced by at least 40% within
8 years after the effective date;
(2) you have a record of the average operating parameter values
over the month-long compliance
demonstration during which the
average uncontrolled total sulfide emissions were reduced by
at least 40%;
(3) you prepare a material balance that includes the pertinent
data used to determine the percent reduction of the total sulfide emissions; and
(4) you comply with the initial
compliance requirements for
closed-vent systems.
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ii. reduce total uncontrolled sulfide
emissions (reported as carbon
disulfide) by at least 40% within
8 years after the effective date
based on a 6-month rolling average; for each vent stream
that you control using a control
device, route the vent stream
through a closed-vent system to
the control device; and comply
with the work practice standard
for closed-vent systems.
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For . . .
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at . . .
for the following emission limit or
work practice standard . . .
you have demonstrated initial
compliance if . . .
d. each new rayon operation ........
i. reduce total uncontrolled sulfide
emissions (reported as carbon
disulfide) by at least 75%;
based on a 6-month rolling average;
ii. for each vent stream that you
control using a control device,
route the vent stream through a
closed-vent system to the control device; and
iii. comply with the work practice
standard for closed-vent systems.
e. each existing or new cellulosic
sponge operation.
i. reduce total uncontrolled sulfide
emissions (reported as carbon
disulfide) by at least 75% based
on a 6-month rolling average;
ii. for each vent stream that you
control using a control device,
route the vent stream through a
closed-vent system to the control device; and
iii. comply with the work practice
standard for closed-vent systems.
f. each existing or new cellophane
operation.
i. reduce total uncontrolled sulfide
emissions (reported as carbon
disulfide) by at least 75% based
on a 6-month rolling average;
ii. for each vent stream that you
control using a control device
(except for retractable hoods
over sulfuric acid baths at a cellophane operation), route the
vent stream through a closedvent system to the control device; and
iii. comply with the work practice
standard for closed-vent systems.
(1) the average uncontrolled total
sulfide emissions, determined
during the month-long compliance demonstration or using
engineering assessments, are
reduced by at least 75%;
(2) you have a record of the average operating parameter values
over the month-long compliance
demonstration during which the
average uncontrolled total sulfide emissions were reduced by
at least 75%;
(3) you prepare a material balance that includes the pertinent
data used to determine the percent reduction of total sulfide
missions; and
(4) you comply with the initial
compliance requirements for
closed-vent systems.
(1) the average uncontrolled total
sulfide emissions, determined
during the month-long compliance demonstration or using
engineering assessments, are
reduced by at least 75%;
(2) you have a record of the average operating parameter values
over the month-long compliance
demonstration during which the
average uncontrolled total sulfide emissions were reduced by
at least 75%;
(3) you prepare a material balance that includes the pertinent
data used to determine and the
percent reduction of total sulfide
emissions; and
(4) you comply with the initial
compliance requirements for
closed-vent systems.
(1) the average uncontrolled total
sulfide emissions, determined
during the month-long compliance demonstration or using
engineering assessments, are
reduced by at least 75%;
(2) you have a record of the average operating parameter values
over the month-long compliance
demonstration during which the
average uncontrolled total sulfide emissions were reduced by
at least 75%;
(3) you prepare a material balance that includes the pertinent
data used to determine the percent reduction of total sulfide
emissions; and
(4) you comply with the initial
compliance requirements for
closed-vent systems.
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Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
For . . .
at . . .
for the following emission limit or
work practice standard . . .
you have demonstrated initial
compliance if . . .
2. the sum of all solvent coating
process vents.
a. each existing or new cellophane operation.
i.
3. the sum of all cellulose ether
process vents.
a. each existing or new cellulose
ether operation using a performance test to demonstrate
initial compliance; or.
i. reduce total uncontrolled organic HAP emissions by at
least 99%; ii. for each vent
stream that you control using a
control device, route the vent
stream through a closed-vent
system to the control device;
and iii. comply with the work
practice standard for closedvent systems; or
b. each existing or new cellulose
ether operation using a material
balance compliance demonstration to demonstrate initial compliance.
i. reduce total uncontrolled organic HAP emissions by at
least 99% based on a 6-month
rolling average;
ii. for each vent stream that you
control using a control device,
route the vent stream through a
closed-vent system to the control device; and iii. comply with
the work practice standard for
closed-vent systems; or
each existing or new cellulose
ether operation.
operate and maintain the closedloop system for cellulose ether
operations.
(1) the average uncontrolled toluene emissions, determined
during the month-long compliance demonstration or using
engineering assessments, are
reduced by at least 95%;
(2) you have a record of the average operating parameter values
over the month-long compliance
demonstration during which the
average uncontrolled toluene
emissions were reduced by at
least 95%;
(3) you prepare a material balance that includes the pertinent
data used to determine the percent reduction of toluene emissions; and
(4) you comply with the initial
compliance requirements for
closed-vent systems.
(1) average uncontrolled total organic HAP emissions, measured during the performance
test or determined using engineering estimates are reduced
by at least 99%;
(2) you have a record of the average operating parameter values
over the performance test during which the average uncontrolled total organic HAP emissions were reduced by at least
99%; and
(3) you comply with the initial
compliance requirements for
closed-vent systems; or
(1) average uncontrolled total organic HAP emissions, determined during the month-long
compliance demonstration or
using engineering estimates are
reduced by at least 99%;
(2) you have a record of the average operation parameter values
over the month-long compliance
demonstration during which the
average uncontrolled total organic HAP emissions were reduced by at least 99%;
(3) you prepare a material balance that includes the pertinent
data used to determine the percent reduction of total organic
HAP emissions;
(4) if you use extended cookout to
comply, you measure the HAP
charged to the reactor, record
the grade of product produced,
and then calculate reactor
emissions prior to extended
cookout by taking a percentage
of the total HAP charged.
you have a record certifying that a
closed-loop system is in use for
cellulose ether operations.
4. closed-loop systems ..................
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reduce uncontrolled toluene
emissions by at least 95%
based on a 6-month rolling average;
ii. for each vent stream that you
control using a control device,
route the vent stream through a
closed-vent system to the control device; and
iii. comply with the work practice
standard for closed-vent systems.
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Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
For . . .
at . . .
for the following emission limit or
work practice standard . . .
you have demonstrated initial
compliance if . . .
5. each carbon disulfide unloading
and storage operation.
a. each existing or new viscose
process affected source.
i. reduce uncontrolled carbon disulfide emissions by at least
83% from unloading and storage operations based on a 6month rolling average if you use
an alternative control technique
not listed in this table for carbon
disulfide unloading and storage
operations; if using a control
device to reduce emissions,
route emissions through a
closed-vent system to the control device; and comply with the
work practice standard for
closed-vent systems;
ii. reduce uncontrolled carbon disulfide by at least 0.14% from
viscose process vents based on
a 6-month rolling average; for
each vent stream that you control using a control device,
route the vent stream through a
closed-vent system to the control device; and comply with the
work practice standard for
closed-vent systems;
(1) you have a record documenting the 83% reduction in
uncontrolled carbon disulfide
emissions; and
(2) if venting to a control device to
reduce emissions, you comply
with the initial compliance requirements for closed-vent systems;
iii. install a nitrogen unloading and
storage system; or
iv. install a nitrogen unloading
system; reduce uncontrolled
carbon disulfide by at least
0.045% from viscose process
vents based on a 6-month rolling average; for each vent
stream that you control using a
control device, route the vent
stream through a closed-vent
system to the control device;
and comply with the work practice standard for closed-vent
systems.
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(1) you comply with the initial
compliance requirements for
viscose process vents at existing or new cellulose food casing, rayon, cellulosic sponge, or
cellophane operations, as applicable;
(2) the 0.14% reduction must be
in addition to the reduction already required for viscose process vents at existing or new
cellulose food casing, rayon,
cellulosic sponge, or cellophane
operations, as applicable; and
(3) you comply with the initial
compliance requirements for
closed-vent systems;
you have a record certifying that a
nitrogen unloading and storage
system is in use; or
(1) you have a record certifying
that a nitrogen unloading system is in use;
(2) you comply with the initial
compliance requirements for
viscose process vents at existing or new cellulose food casing, rayon, cellulosic sponge, or
cellophane operations, as applicable;
(3) the 0.045% reduction must be
in addition to the reduction already required for viscose process vents at cellulose food casing, rayon, cellulosic sponge, or
cellophane operations, as applicable; and
(4) you comply with the initial
compliance requirements for
closed-vent systems.
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For . . .
at . . .
for the following emission limit or
work practice standard . . .
you have demonstrated initial
compliance if . . .
6. each toluene storage vessel ......
a. each existing or new cellophane operation.
i.
7. equipment leaks ........................
a. each existing or new cellulose
ether operation.
i.
(1) the average uncontrolled toluene emissions, determined
during the month-long compliance demonstration or using
engineering assessments, are
reduced by at least 95%;
(2) you have a record of the average operating parameter values
over the month-long compliance
demonstration during which the
average uncontrolled toluene
emissions were reduced by at
least 95%;
(3) you prepare a material balance that includes the pertinent
data used to determine the percent reduction of toluene emissions; and
(4) if venting to a control device to
reduce emissions, you comply
with the initial compliance requirements for closed-vent systems.
you comply with the applicable requirements described in the Notification of Compliance Status
Report
provisions
in
§ 63.182(a)(2)
and
(c)(1)
through (3), except that references to the term ‘‘process
unit’’ mean ‘‘cellulose ether
process unit’’ for the purposes
of this subpart; or
you comply with the applicable requirements described in the Initial Compliance Status Report
provisions of § 63.1039(a), except that references to the term
‘‘process unit’’ mean ‘‘cellulose
ether process unit’’ for the purposes of this subpart.
you comply with the applicability
and Group 1/Group 2 determination provisions of § 63.144
and the initial compliance provisions of §§ 63.105 and 63.145.
you install emission suppression
equipment and conduct an initial inspection according to the
provisions of to §§ 63.133
through 63.137.
reduce uncontrolled toluene
emissions by at least 95%
based on a 6-month rolling average;
ii. if using a control device to reduce emissions, route the emissions through a closed-vent
system to the control device;
and
iii. comply with the work practice
standard for closed-vent systems.
comply with the applicable
equipment leak standards of
§§ 63.162 through 63.179; or
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ii. comply with the applicable
equipment leak standards of
§§ 63.1021 through 63.1027.
8. all sources of wastewater emissions.
each existing or new cellulose
ether operation.
comply with the applicable wastewater provisions of § 63.105
and §§ 63.132 through 63.140.
9. liquid streams in open systems
each existing or new cellulose
ether operation.
10. closed-vent system used to
route emissions to a control device.
a. each existing or new affected
source.
comply with the applicable provisions of § 63.149, except that
references to ‘‘chemical manufacturing process unit’’ mean
‘‘cellulose ether process unit’’
for the purposes of this subpart.
i. conduct annual inspections, repair leaks, and maintain records
as specified in § 63.148.
11. closed-vent system containing
a bypass line that could divert a
vent stream away from a control
device, except for equipment
needed for safety purposes (described in § 63.148(f)(3)).
a. each existing or new affected
source.
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i. install, calibrate, maintain, and
operate a flow indicator as
specified in § 63.148(f)(1); or
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(1) you conduct an initial inspection of the closed-vent system
and maintain records according
to § 63.148;
(2) you prepare a written plan for
inspecting
unsafe-to-inspect
and difficult-to-inspect equipment
according
to
§ 63.148(g)(2) and (h)(2); and
(3) you repair any leaks and
maintain records according to
§ 63.148.
you have a record documenting
that you installed a flow indicator as specified in Table 1 to
this subpart; or
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For . . .
at . . .
12. heat exchanger system that
cools process equipment or materials in the process unit.
a. each existing or new affected
source.
14. Table 4 to Subpart UUUU is
amended to read as follows:
for the following emission limit or
work practice standard . . .
you have demonstrated initial
compliance if . . .
ii. secure the bypass line valve in
the closed position with a carseal or lock-and-key type configuration and inspect the seal
or closure mechanism at least
once per month as specified in
§ 63.148(f)(2).
i. monitor and repair the heat exchanger system according to
§ 63.104(a) through (e), except
that references to ‘‘chemical
manufacturing process unit’’
mean ‘‘cellulose food casing,
rayon, cellulosic sponge, cellophane, or cellulose ether process unit’’ for the purposes of
this subpart.
you have record documenting that
you have secured the bypass
line valve as specified in Table
1 to this subpart.
Table 4 to Subpart UUUU of Part 63—
Requirements for Performance Tests
■
As required in §§ 63.5530(b) and
63.5535(a), (b), (g)(1), and (h)(1), you
(1) you determine that the heat
exchanger system is exempt
from monitoring requirements
because it meets one of the
conditions in § 63.104(a)(1)
through (6), and you document
this finding in your Notification
of Compliance Status Report;
or
(2) if your heat exchanger system
is not exempt, you identify in
your Notification of Compliance
Status Report the HAP or other
representative substance that
you will monitor, or you prepare
and maintain a site-specific
plan containing the information
required by § 63.104(c) (1) (i)
through (iv) that documents the
procedures you will use to detect leaks by monitoring surrogate indicators of the leak.
must conduct performance tests, other
initial compliance demonstrations, and
CEMS performance evaluations and
establish operating limits according to
the requirements in the following table:
For . . .
at . . .
you must . . .
using . . .
according to the following requirements
. . .
1. the sum of all process vents ................
a. the sum of all
process vents.
i. select sampling port’s location and the
number of traverse points;.
ii. determine velocity and volumetric flow
rate;.
EPA Method 1 or 1A in appendix A–1 to
40 CFR part 60 of this chapter;
EPA Method 2, 2A, 2C, 2D, 2F, or 2G in
appendices A–1 and A–2 to part 60 of
this chapter.
(1) EPA Method 3, 3A, or 3B in appendix A–2 to part 60 of this chapter; or,
sampling sites must be located at the
inlet and outlet to each control device;
you may use EPA Method 2A, 2C, 2D,
2F, or 2G as an alternative to using
EPA Method 2, as appropriate;
you may use EPA Method 3A or 3B as
an alternative to using EPA Method 3;
or,
you may use ASME PTC 19.10–1981—
Part 10 as an alternative to using the
manual procedures (but not instrumental procedures) in EPA Method
3B.
iii. conduct gas analysis; and, ................
(2) ASME PTC 19.10–1981—Part 10
(incorporated
by
reference—see
§ 63.14); and,
2. the sum of all viscose process vents ...
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a. each existing or
new viscose process source.
iv. measure moisture content of the
stack gas.
i. measure total sulfide emissions ..........
EPA Method 4 in appendix A–3 to part
60 of this chapter.
(1) EPA Method 15 in appendix A–5 to
part 60 of this chapter; or
(2) carbon disulfide and/or hydrogen sulfide CEMS, as applicable;
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(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
(b) you must conduct testing of emissions from continuous viscose process vents and combinations of batch
and continuous viscose process vents
at normal operating conditions, as
specified in § 63.5535;
(c) you must conduct testing of emissions from batch viscose process
vents as specified in § 63.490(c), except that the emission reductions required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(d) you must collect CPMS data during
the period of the initial compliance
demonstration and determine the
CPMS operating limit during the period of the initial compliance demonstration; or
(a) you must measure emissions at the
inlet and outlet of each control device
using CEMS;
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For . . .
at . . .
3. the sum of all solvent coating process
vents.
you must . . .
a. each existing or
new cellophane
operation.
according to the following requirements
. . .
using . . .
i. measure toluene emissions .................
(1) EPA Method 18 in appendix A–6 to
part 60 of this chapter, or Method 320
in appendix A to part 63; or.
(2) ASTM D6420–99 (Reapproved
2010) (incorporated by reference—
see § 63.14); or.
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(3) ASTM D6348–12e1 ...........................
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(b) you must install, operate, and maintain the CEMS according to the applicable performance specification (PS–
7, PS–8, PS–9, or PS–15) of 40 CFR
part 60, appendix B; and
(c) you must collect CEMS emissions
data at the inlet and outlet of each
control device during the period of the
initial compliance demonstration and
determine the CEMS operating limit
during the period of the initial compliance demonstration.
(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
(b) you may use EPA Method 18 or 320
to determine the control efficiency of
any control device for organic compounds; for a combustion device, you
must use only HAP that are present in
the inlet to the control device to characterize the percent reduction across
the combustion device;
(c) you must conduct testing of emissions from continuous solvent coating
process vents and combinations of
batch and continuous solvent coating
process vents at normal operating
conditions, as specified in § 63.5535;
(d) you must conduct testing of emissions from batch solvent coating process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(d) you must conduct testing of emissions from batch solvent coating process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
(b) you may use ASTM D6420–99 (Reapproved 2010) as an alternative to
EPA Method 18 only where: the target
compound(s) are known and are listed in ASTM D6420–99 as measurable; this ASTM should not be used
for methane and ethane because their
atomic mass is less than 35; ASTM
D6420 should never be specified as a
total VOC method;
(c) you must conduct testing of emissions from continuous solvent coating
process vents and combinations of
batch and continuous solvent coating
process vents at normal operating
conditions, as specified in § 63.5535;
(d) you must conduct testing of emissions from batch solvent coating process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(e) you must collect CPMS data during
the period of the initial compliance
demonstration and determine the
CPMS operating limit during the period of the initial compliance demonstration.
(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
For . . .
at . . .
jbell on DSK3GLQ082PROD with PROPOSALS2
4. the sum of all cellulose ether process
vents.
you must . . .
a. each existing or
new cellulose
ether operation.
according to the following requirements
. . .
using . . .
i. measure total organic HAP emissions
(1) EPA Method 18 in appendix A–6 to
part 60 of this chapter or Method 320
in appendix A to part 63, or.
(2) ASTM D6420–99 (Reapproved
2010) (incorporated by reference—
see § 63.14); or.
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47387
09SEP2
(b) you may use ASTM D6348–12e1 as
an alternative to EPA Method 320
only where the following conditions
are met: (1) The test plan preparation
and implementation in the Annexes to
ASTM D 6348–03, Sections A1
through A8 are mandatory; and (2) in
ASTM D6348–03 Annex A5 (Analyte
Spiking Technique), the percent recovery (%R) must be determined for
each target analyte (Equation A5.5).
In order for the test data to be acceptable for a compound, %R must be
greater than or equal to 70 percent
and less than or equal to 130 percent.
If the %R value does not meet this
criterion for a target compound, the
test data are not acceptable for that
compound and the test must be repeated for that analyte (i.e., the sampling and/or analytical procedure
should be adjusted before a retest).
The %R value for each compound
must be reported in the test report,
and all field measurements must be
corrected with the calculated %R
value for that compound by using the
following equation: Reported Results
= ((Measured Concentration in the
Stack))/(%R) × 100.
(c) you must conduct testing of emissions from continuous solvent coating
process vents and combinations of
batch and continuous solvent coating
process vents at normal operating
conditions, as specified in § 63.5535;
(d) you must conduct testing of emissions from batch solvent coating process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(e) you must collect CPMS data during
the period of the initial compliance
demonstration and determine the
CPMS operating limit during the period of the initial compliance demonstration.
(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
(b) you may use EPA Method 18 or 320
to determine the control efficiency of
any control device for organic compounds; for a combustion device, you
must use only HAP that are present in
the inlet to the control device to characterize the percent reduction across
the combustion device;
(c) you must conduct testing of emissions from continuous cellulose ether
process vents and combinations of
batch and continuous cellulose ether
process vents at normal operating
conditions, as specified in § 63.5535;
(d) you must conduct testing of emissions from batch cellulose ether process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(d) you must conduct testing of emissions from batch cellulose ether process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
47388
Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
For . . .
at . . .
you must . . .
according to the following requirements
. . .
using . . .
jbell on DSK3GLQ082PROD with PROPOSALS2
(3) ASTM D6348–12e1 ...........................
(3) EPA Method 25 in appendix A–7 to
part 60 of this chapter; or.
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(b) you may use ASTM D6420–99 (Reapproved 2010) as an alternative to
EPA Method 18 only where: the target
compound(s) are known and are listed in ASTM D6420–99 as measurable; this ASTM should not be used
for methane and ethane because their
atomic mass is less than 35; ASTM
D6420 should never be specified as a
total VOC method;
(c) you must conduct testing of emissions from continuous cellulose ether
process vents and combinations of
batch and continuous cellulose ether
process vents at normal operating
conditions, as specified in § 63.5535;
(d) you must conduct testing of emissions from batch cellulose ether process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(e) you must collect CPMS data during
the period of the initial performance
test and determine the CPMS operating limit during the period of the initial performance test.
(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
(b) you may use ASTM D6348–12e1 as
an alternative to EPA Method 320
only where the following conditions
are met: (1) The test plan preparation
and implementation in the Annexes to
ASTM D 6348–03, Sections A1
through A8 are mandatory; and (2) in
ASTM D6348–03 Annex A5 (Analyte
Spiking Technique), the percent recovery (%R) must be determined for
each target analyte (Equation A5.5).
In order for the test data to be acceptable for a compound, %R must be
greater than or equal to 70 percent
and less than or equal to 130 percent.
If the %R value does not meet this
criterion for a target compound, the
test data are not acceptable for that
compound and the test must be repeated for that analyte (i.e., the sampling and/or analytical procedure
should be adjusted before a retest).
The %R value for each compound
must be reported in the test report,
and all field measurements must be
corrected with the calculated %R
value for that compound by using the
following equation: Reported Results
= ((Measured Concentration in the
Stack))/(%R) × 100.
(c) you must conduct testing of emissions from continuous solvent coating
process vents and combinations of
batch and continuous solvent coating
process vents at normal operating
conditions, as specified in § 63.5535;
(d) you must conduct testing of emissions from batch solvent coating process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(e) you must collect CPMS data during
the period of the initial compliance
demonstration and determine the
CPMS operating limit during the period of the initial compliance demonstration.
(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
(b) you must conduct testing of emissions at the inlet and outlet of each
control device;
(c) you must conduct testing of emissions from continuous cellulose ether
process vents and combinations of
batch and continuous cellulose ether
process vents at normal operating
conditions, as specified in § 63.5535;
Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
For . . .
at . . .
you must . . .
according to the following requirements
. . .
using . . .
(4) EPA Method 25A in appendix A–7 to
part 60 of this chapter.
jbell on DSK3GLQ082PROD with PROPOSALS2
5. each toluene storage vessel ................
a. each existing or
new cellophane
operation.
i. measure toluene emissions .................
(1) EPA Method 18 in appendix A–6 to
part 60 of this chapter or Method 320
in appendix A to part 63; or.
(2) ASTM D6420–99 (Reapproved
2010) (incorporated by reference—
see § 63.14); or.
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E:\FR\FM\09SEP2.SGM
47389
09SEP2
(d) you must conduct testing of emissions from batch cellulose ether process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(e) you must collect CPMS data during
the period of the initial performance
test and determine the CPMS operating limit during the period of the initial performance test; or
(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
(b) you may use EPA Method 25A if: an
exhaust gas volatile organic matter
concentration of 50 ppmv or less is
required in order to comply with the
emission limit; the volatile organic
matter concentration at the inlet to the
control device and the required level
of control are such as to result in exhaust volatile organic matter concentrations of 50 ppmv or less; or because of the high control efficiency of
the control device, the anticipated
volatile organic matter concentration
at the control device exhaust is 50
ppmv or less, regardless of the inlet
concentration;
(c) you must conduct testing of emissions from continuous cellulose ether
process vents and combinations of
batch and continuous cellulose ether
process vents at normal operating
conditions, as specified in § 63.5535;
(d) you must conduct testing of emissions from batch cellulose ether process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and,
(e) you must collect CPMS data during
the period of the initial performance
test and determine the CPMS operating limit during the period of the initial performance test.
(a) if venting to a control device to reduce emissions, you must conduct
testing of emissions at the inlet and
outlet of each control device;
(b) you may use EPA Method 18 or 320
to determine the control efficiency of
any control device for organic compounds; for a combustion device, you
must use only HAP that are present in
the inlet to the control device to characterize the percent reduction across
the combustion device;
(c) you must conduct testing of emissions from continuous storage vessel
vents and combinations of batch and
continuous storage vessel vents at
normal operating conditions, as specified in § 63.5535 for continuous process vents;
(d) you must conduct testing of emissions from batch storage vessel vents
as specified in § 63.490(c) for batch
process vents, except that the emission reductions required for process
vents under this subpart supersede
the emission reductions required for
process vents under subpart U of this
part; and,
(e) you must collect CPMS data during
the period of the initial compliance
demonstration and determine the
CPMS operating limit during the period of the initial compliance demonstration; or
(a) if venting to a control device to reduce emissions, you must conduct
testing of emissions at the inlet and
outlet of each control device;
47390
Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
For . . .
at . . .
you must . . .
according to the following requirements
. . .
using . . .
jbell on DSK3GLQ082PROD with PROPOSALS2
(3) ASTM D6348–12e1 ...........................
6. the sum of all process vents controlled
using a flare.
7. equipment leaks ...................................
a. each existing or
new affected
source.
a. each existing or
new cellulose
ether operation.
i. measure visible emissions ...................
(1) EPA Method 22 in appendix A–7 to
part 60 of this chapter.
i. measure leak rate ................................
(1) applicable equipment leak test methods in § 63.180; or.
(2) applicable equipment leak test methods in § 63.1023.
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E:\FR\FM\09SEP2.SGM
09SEP2
(b) you may use ASTM D6420–99 (Reapproved 2010) as an alternative to
EPA Method 18 only where: the target
compound(s) are known and are listed in ASTM D6420–99 as measurable; this ASTM should not be used
for methane and ethane because their
atomic mass is less than 35; ASTM
D6420 should never be specified as a
total VOC method;
(c) you must conduct testing of emissions from continuous storage vessel
vents and combinations of batch and
continuous storage vessel vents at
normal operating conditions, as specified in § 63.5535 for continuous process vents;
(d) you must conduct testing of emissions from batch storage vessel vents
as specified in § 63.490(c) for batch
process vents, except that the emission reductions required for process
vents under this subpart supersede
the emission reductions required for
process vents under subpart U of this
part; and,
(e) you must collect CPMS data during
the period of the initial compliance
demonstration and determine the
CPMS operating limit during the period of the initial compliance demonstration.
(a) you must conduct testing of emissions at the inlet and outlet of each
control device;
(b) you may use ASTM D6348–12e1 as
an alternative to EPA Method 320
only where the following conditions
are met: (1) The test plan preparation
and implementation in the Annexes to
ASTM D 6348–03, Sections A1
through A8 are mandatory; and (2) in
ASTM D6348–03 Annex A5 (Analyte
Spiking Technique), the percent recovery (%R) must be determined for
each target analyte (Equation A5.5).
In order for the test data to be acceptable for a compound, %R must be
greater than or equal to 70 percent
and less than or equal to 130 percent.
If the %R value does not meet this
criterion for a target compound, the
test data are not acceptable for that
compound and the test must be repeated for that analyte (i.e., the sampling and/or analytical procedure
should be adjusted before a retest).
The %R value for each compound
must be reported in the test report,
and all field measurements must be
corrected with the calculated %R
value for that compound by using the
following equation: Reported Results
= ((Measured Concentration in the
Stack))/(%R) × 100.
(c) you must conduct testing of emissions from continuous solvent coating
process vents and combinations of
batch and continuous solvent coating
process vents at normal operating
conditions, as specified in § 63.5535;
(d) you must conduct testing of emissions from batch solvent coating process vents as specified in § 63.490(c),
except that the emission reductions
required for process vents under this
subpart supersede the emission reductions required for process vents
under subpart U of this part; and
(e) you must collect CPMS data during
the period of the initial compliance
demonstration and determine the
CPMS operating limit during the period of the initial compliance demonstration.
(a) you must conduct the flare visible
emissions
test
according
to
§ 63.11(b).
(a) you must follow all requirements for
the applicable equipment leak test
methods in § 63.180; or
(a) you must follow all requirements for
the applicable equipment leak test
methods in § 63.1023.
Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
according to the following requirements
. . .
For . . .
at . . .
you must . . .
using . . .
8. all sources of wastewater emissions ....
a. each existing or
new cellulose
ether operation.
i. measure wastewater HAP emissions ..
(1) applicable wastewater test methods
and procedures in §§ 63.144 and
63.145; or.
(2) applicable wastewater test methods
and procedures in §§ 63.144 and
63.145, using ASTM D5790–95 (Reapproved 2012) as an alternative to
EPA Method 624 in appendix A to
part 163 of this chapter..
9. any emission point ................................
a. each existing or
new affected
source using a
CEMS to demonstrate compliance.
15. Table 5 to Subpart UUUU is
revised to read as follows:
i. conduct a CEMS performance evaluation.
(1) applicable requirements in § 63.8
and applicable performance specification (PS–7, PS–8, PS–9, or PS–15) in
appendix B to part 60 of this chapter.
Table 5 to Subpart UUUU of Part 63—
Continuous Compliance With Emission
Limits and Work Practice Standards
■
jbell on DSK3GLQ082PROD with PROPOSALS2
As required in § 63.5555(a), you must
demonstrate continuous compliance
47391
(a) You must follow all requirements for
the applicable wastewater test methods and procedures in §§ 63.144 and
63.145; or
(a) you must follow all requirements for
the applicable waste water test methods and procedures in §§ 63.144 and
63.145, except that you may use
ASTM D5790–95 (Reapproved 2012)
as an alternative to EPA Method 624,
under the condition that this ASTM
method be used with the sampling
procedures of EPA Method 25D or an
equivalent method.
(a) you must conduct the CEMS performance evaluation during the period
of the initial compliance demonstration
according to the applicable requirements in § 63.8 and the applicable
performance specification (PS–7, PS–
8, PS–9, or PS–15) of 40 CFR part
60, appendix B;
(b) you must install, operate, and maintain the CEMS according to the applicable performance specification (PS–
7, PS–8, PS–9, or PS–15) of 40 CFR
part 60, appendix B; and
(c) you must collect CEMS emissions
data at the inlet and outlet of each
control device during the period of the
initial compliance demonstration and
determine the CEMS operating limit
during the period of the initial compliance demonstration.
with the appropriate emission limits
and work practice standards according
to the requirements in the following
table:
For . . .
at . . .
for the following emission limit or work practice standard . . .
you must demonstrate continuous compliance
by . . .
1. the sum of all viscose process vents.
a. each existing or
new viscose process affected source.
(1) maintaining a material balance that includes the pertinent data used to determine
the percent reduction of total sulfide emissions;
(2) documenting the percent reduction of total
sulfide emissions using the pertinent data
from the material balance; and
(3) complying with the continuous compliance
requirements for closed-vent systems.
2. the sum of all solvent coating process
vents.
a. each existing or
new cellophane operation.
3. the sum of all cellulose ether process
vents.
a. each existing or
new cellulose ether
operation using a
performance test to
demonstrate initial
compliance; or.
i. reduce total uncontrolled sulfide emissions
(reported as carbon disulfide) by at least
the specified percentage based on a 6month rolling average;.
ii. for each vent stream that you control using
a control device (except for retractable
hoods over sulfuric acid baths at a cellophane operation), route the vent stream
through a closed-vent system to the control
device; and.
iii. comply with the work practice standard for
closed-vent systems (except for retractable
hoods over sulfuric acid baths at a cellophane operation).
i. reduce uncontrolled toluene emissions by
at least 95% based on a 6-month rolling
average;.
ii. for each vent stream that you control using
a control device, route the vent stream
through a closed-vent system to the control
device; and.
iii. comply with the work practice standard for
closed-vent systems.
i. reduce total uncontrolled organic HAP
emissions by at least 99%;.
ii. for each vent stream that you control using
a control device, route the vent stream
through a closed-vent system to the control
device; and,.
iii. comply with the work practice standard for
closed-vent systems; or.
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(1) maintaining a material balance that includes the pertinent data used to determine
the percent reduction of toluene emissions;
(2) documenting the percent reduction of toluene emissions using the pertinent data
from the material balance; and
(3) complying with the continuous compliance
requirements for closed-vent systems.
(1) complying with the continuous compliance
requirements for closed-vent systems; or
(2) if using extended cookout to comply,
monitoring reactor charges and keeping
records to show that extended cookout was
employed.
E:\FR\FM\09SEP2.SGM
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47392
Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
For . . .
4. closed-loop systems
5. each carbon disulfide unloading and
storage operation.
at . . .
for the following emission limit or work practice standard . . .
you must demonstrate continuous compliance
by . . .
b. each existing or
new cellulose ether
operation using a
material balance
compliance demonstration to demonstrate initial compliance.
i. reduce total uncontrolled organic HAP
emissions by at least 99% based on a 6month rolling average;.
ii. for each vent stream that you control using
a control device, route the vent stream
through a closed-vent system to control device; and.
iii. comply with the work practice standard for
closed-vent systems.
each existing or new
cellulose either operation.
a. each existing or
new viscose process affected source.
operate and maintain a closed-loop system ...
(1) maintaining a material balance that includes the pertinent data used to determine
the percent reduction of total organic HAP
emissions;
(2) documenting the percent reduction of total
organic HAP emissions using the pertinent
data from the material balance;
(3) if using extended cookout to comply,
monitoring reactor charges and keeping
records to show that extended cookout was
employed;
(4) complying with the continuous compliance
requirements for closed-vent systems.
keeping a record certifying that a closed-loop
system is in use for cellulose ether operations.
(1) keeping a record documenting the 83%
reduction in carbon disulfide emissions;
and (2) if venting to a control device to reduce emissions, complying with the continuous compliance requirements for closedvent systems;
i. reduce uncontrolled carbon disulfide emissions by at least 83% based on a 6-month
rolling average if you use an alternative
control technique not listed in this table for
carbon disulfide unloading and storage operations; if using a control device to reduce
emissions, route emissions through a
closed-vent system to the control device;
and comply with the work practice standard
for closed-vent systems;.
ii. reduce total uncontrolled sulfide emissions
by at least 0.14% from viscose process
vents based on a 6-month rolling average;
for each vent stream that you control using
a control device, route the vent stream
through a closed-vent system to the control
device; and comply with the work practice
standard for closed-vent systems;.
jbell on DSK3GLQ082PROD with PROPOSALS2
iii. install a nitrogen unloading and storage
system; or.
iv. install a nitrogen unloading system; reduce
total uncontrolled sulfide emissions by at
least 0.045% from viscose process vents
based on a 6-month rolling average; for
each vent stream that you control using a
control device, route the vent stream
through a closed-vent system to the control
device; and comply with the work practice
standard for closed-vent systems.
6. each toluene storage
vessel.
a. each existing or
new cellophane operation.
a. each existing or new cellophane operation
7. equipment leaks ......
a. each existing or
new cellulose ether
operation.
i. applicable equipment leak standards of
§§ 63.162 through 63.179; or.
ii. applicable equipment leak standards of
§§ 63.1021 through 63.1037.
8. all sources of wastewater emissions.
each existing or new
cellulose either operation.
each existing or new
cellulose ether operation.
applicable wastewater provisions of § 63.105
and §§ 63.132 through 63.140..
9. liquid streams in
open systems.
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comply with the applicable provisions of
§ 63.149, except that references to ‘‘chemical manufacturing process unit’’ mean
‘‘cellulose ether process unit’’ for the purposes of this subpart.
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(1) maintaining a material balance that includes the pertinent data used to determine
the percent reduction of total sulfide emissions;
(2) documenting the percent reduction of total
sulfide emissions using the pertinent data
from the material balance; and
(3) complying with the continuous compliance
requirements for closed-vent systems;
Keeping a record certifying that a nitrogen
unloading and storage system is in use; or
(1) keeping a record certifying that a nitrogen
unloading system is in use;
(2) maintaining a material balance that includes the pertinent data used to determine
the percent reduction of total sulfide emissions;
(3) documenting the percent reduction of total
sulfide emissions using the pertinent data
from the material balance; and
(4) complying with the continuous compliance
requirements for closed-vent systems.
(1) maintaining a material balance that includes the pertinent data used to determine
the percent reduction of toluene emissions;
(2) documenting the percent reduction of toluene emissions using the pertinent data
from the material balance; and
(3) if venting to a control device to reduce
emissions, complying with the continuous
compliance requirements for closed-vent
systems.
complying with the applicable equipment leak
continuous compliance provisions of
§§ 63.162 through 63.179; or
complying with the applicable equipment leak
continuous compliance provisions of
§§ 63.1021 through 63.1037.
complying with the applicable wastewater
continuous compliance provisions of
§§ 63.105, 63.143, and 63.148.
conducting inspections, repairing failures,
documenting delay of repair, and maintaining records of failures and corrective actions according to §§ 63.133 through
63.137.
E:\FR\FM\09SEP2.SGM
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Federal Register / Vol. 84, No. 174 / Monday, September 9, 2019 / Proposed Rules
47393
For . . .
at . . .
for the following emission limit or work practice standard . . .
you must demonstrate continuous compliance
by . . .
10. closed-vent system
used to route emissions to a control device.
11. closed-vent system
containing a bypass
line that could divert
a vent stream away
from a control device, except for
equipment needed
for safety purposes
(described in
§ 63.148(f)(3).
each existing or new
affected source.
conduct annual inspections, repair leaks,
maintain records as specified in § 63.148.
conducting the inspections, repairing leaks,
and maintaining records according to
§ 63.148.
a. each existing or
new affected source.
i. install, calibrate, maintain, and operate a
flow indicator as specified in § 63.148(f)(1);
or.
(1) taking readings from the flow indicator at
least once every 15 minutes;
(2) maintaining hourly records of flow indicator operation and detection of any diversion during the hour, and
(3) recording all periods when the vent
stream is diverted from the control stream
or the flow indicator is not operating; or
.....................................
ii. secure the bypass line valve in the closed
position with a car-seal or lock-and-key
type configuration and inspect the seal or
mechanism at least once per month as
specified in § 63.148(f)(2)..
a. each existing or
new affected source.
i. monitor and repair the heat exchanger system according to § 63.104(a) through (e),
except that references to ‘‘chemical manufacturing process unit’’ mean ‘‘cellulose
food casing, rayon, cellulosic sponge, cellophane, or cellulose ether process unit’’ for
the purposes of this subpart.
(1) maintaining a record of the monthly visual
inspection of the seal or closure mechanism for the bypass line; and
(2) recording all periods when the seal mechanism is broken, the bypass line valve position has changed, or the key for a lockand-key type lock has been checked out.
(1) monitoring for HAP compounds, other
substances, or surrogate indicators at the
frequency specified in § 63.104(b) or (c);
(2) repairing leaks within the time period
specified in § 63.104(d)(1);
(3) confirming that the repair is successful as
specified in § 63.104(d)(2);
(4) following the procedures in § 63.104(e) if
you implement delay of repair; and
(5) recording the results of inspections and
repair according to § 63.104(f)(1).
12. heat exchanger
system that cools
process equipment
or materials in the
process unit.
16. Table 6 to Subpart UUUU is
revised to read as follows:
■
Table 6 to Subpart UUUU of Part 63—
Continuous Compliance With Operating
Limits
with the appropriate operating limits
according to the requirements in the
following table:
As required in § 63.5555(a), you must
demonstrate continuous compliance
For the following control
technique . . .
for the following operating limit . . .
you must demonstrate continuous compliance by . . .
1. condenser ........................
maintain the daily average condenser outlet gas or condensed liquid temperature no higher than the value
established during the compliance demonstration.
2. thermal oxidizer ...............
a. for normal operations, maintain the daily average
thermal oxidizer firebox temperature no lower than
the value established during the compliance demonstration.
collecting the condenser outlet gas or condensed liquid
temperature data according to § 63.5545; reducing
the condenser outlet gas temperature data to daily
averages; and maintaining the daily average condenser outlet gas or condensed liquid temperature no
higher than the value established during the compliance demonstration.
collecting the thermal oxidizer firebox temperature data
according to § 63.5545; reducing the thermal oxidizer
firebox temperature data to daily averages; and
maintaining the daily average thermal oxidizer firebox
temperature no lower than the value established during the compliance demonstration.
collecting the appropriate, site-specific data needed to
demonstrate that the oxidizer was properly operating
prior to emission unit start up; and excluding firebox
temperature from the daily averages during emission
unit startup.
collecting the scrubber pressure drop and scrubber liquid flow rate data according to § 63.5545; reducing
the scrubber parameter data to daily averages; and
maintaining the daily scrubber parameter values within the range of values established during the compliance demonstration.
b. for periods of startup, maintain documentation demonstrating that the oxidizer was properly operating
(e.g., firebox temperature had reached the setpoint
temperature) prior to emission unit startup.
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3. water scrubber .................
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a. for normal operations, maintain the daily average
scrubber pressure drop and scrubber liquid flow rate
within the range of values established during the
compliance demonstration.
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For the following control
technique . . .
4. caustic scrubber ...............
5. flare ..................................
for the following operating limit . . .
you must demonstrate continuous compliance by . . .
b. for periods of startup and shutdown, maintain documentation to confirm that the scrubber is operating
properly prior to emission unit startup and continues
to operate properly until emission unit shutdown is
complete. Appropriate startup and shutdown operating parameters may be based on equipment design, manufacturer’s recommendations, or other sitespecific operating values established for normal operating periods.
a. for normal operations, maintain the daily average
scrubber pressure drop, scrubber liquid flow rate, and
scrubber liquid pH, conductivity, or alkalinity within
the range of values established during the compliance demonstration.
collecting the appropriate, site-specific data needed to
demonstrate that the scrubber was operating properly
during emission unit startup and emission unit shutdown; and excluding parameters from the daily average calculations.
b. for periods of startup and shutdown, maintain documentation to confirm that the scrubber is operating
properly prior to emission unit startup and continues
to operate properly until emission unit shutdown is
complete. Appropriate startup and shutdown operating parameters may be based on equipment design, manufacturer’s recommendations, or other sitespecific operating values established for normal operating periods.
maintain the presence of a pilot flame ...........................
6. biofilter .............................
maintain the daily average biofilter inlet gas temperature, biofilter effluent pH or conductivity, and pressure
drop within the values established during the compliance demonstration.
7. carbon absorber ...............
maintain the regeneration frequency, total regeneration
stream mass or volumetric flow during carbon bed regeneration and temperature of the carbon bed after
regeneration (and within 15 minutes of completing
any cooling cycle(s)) for each regeneration cycle
within the values established during the compliance
demonstration.
8. oil absorber ......................
maintain the daily average absorption liquid flow, absorption liquid temperature, and steam flow within the
values established during the compliance demonstration.
9. any of the control techniques specified in this
table.
if using a CEMS, maintain the daily average control efficiency for each control device no lower than the
value established during the compliance demonstration.
17. Table 7 to Subpart UUUU is
revised to read as follows:
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■
collecting the scrubber pressure drop, scrubber liquid
flow rate, and scrubber liquid pH, conductivity, or alkalinity data according to § 63.5545; reducing the
scrubber parameter data to daily averages; and
maintaining the daily scrubber parameter values within the range of values established during the compliance demonstration.
collecting the appropriate, site-specific data needed to
demonstrate that the scrubber was operating properly
during emission unit startup and emission unit shutdown; and excluding parameters from the daily average calculations.
collecting the pilot flame data according to § 63.5545;
and maintaining the presence of the pilot flame.
collecting the biofilter inlet gas temperature, biofilter effluent pH or conductivity, and biofilter pressure drop
data according to § 63.5545; reducing the biofilter parameter data to daily averages; and maintaining the
daily biofilter parameter values within the values established during the compliance demonstration.
collecting the data on regeneration frequency, total regeneration stream mass or volumetric flow during
carbon bed regeneration and temperature of the carbon bed after regeneration (and within 15 minutes of
completing any cooling cycle(s)) for each regeneration cycle according to § 63.5545; and maintaining
carbon absorber parameter values for each regeneration cycle within the values established during the
compliance demonstration.
collecting the absorption liquid flow, absorption liquid
temperature, and steam flow data according to
§ 63.5545; reducing the oil absorber parameter data
to daily averages; and maintaining the daily oil absorber parameter values within the values established during the compliance demonstration.
collecting CEMS emissions data at the inlet and outlet
of each control device according to § 63.5545; determining the control efficiency values for each control
device using the inlet and outlet CEMS emissions
data; reducing the control efficiency values for each
control device to daily averages; and maintaining the
daily average control efficiency for each control device no lower than the value established during the
compliance demonstration.
Table 7 to Subpart UUUU of Part 63—
Notifications
As required in §§ 63.5490(c)(4),
63.5530(c), 63.5575, and 63.5595(b), you
must submit the appropriate
notifications specified in the following
table:
If you . . .
then you must . . .
1. are required to conduct a performance test ........................................
submit a notification of intent to conduct a performance test at least 60
calendar days before the performance test is scheduled to begin, as
specified in §§ 63.7(b)(1) and 63.9(e).
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If you . . .
then you must . . .
2. are required to conduct a CMS performance evaluation .....................
submit a notification of intent to conduct a CMS performance evaluation at least 60 calendar days before the CMS performance evaluation is scheduled to begin, as specified in §§ 63.8(e)(2) and 63.9(g).
submit a request to use alternative monitoring method no later than the
notification of the initial performance test or CMS performance evaluation or 60 days prior to any other initial compliance demonstration,
as specified in § 63.8(f)(4).
submit an initial notification no later than 120 days after June 11, 2002,
as specified in § 63.9(b)(2).
submit an initial notification no later than 120 days after you become
subject to this subpart, as specified in § 63.9(b)(3).
submit a request for extension of compliance no later than 120 days
before the compliance date, as specified in §§ 63.9(c) and 63.6(i)(4).
notify the Administrator of your compliance obligations no later than the
initial notification dates established in § 63.9(b) for new sources not
subject to the special provisions, as specified in § 63.9(d).
notify the Administrator of the anticipated date for conducting the observations specified in § 63.6(h)(5), as specified in §§ 63.6(h)(4) and
63.9(f).
a. submit a Notification of Compliance Status Report, as specified in
§ 63.9(h);
b. submit the Notification of Compliance Status Report, including the
performance test, CEMS performance evaluation, and any other initial compliance demonstration results within 240 calendar days following the compliance date specified in § 63.5495; and
c. beginning on [DATE 180 DAYS AFTER DATE OF PUBLICATION
OF FINAL RULE IN THE FEDERAL REGISTER], submit all subsequent Notifications of Compliance Status following the procedure
specified in § 63.5580(g), (j), and (k).
comply with the notification requirements specified in § 63.182(a)(1)
and (2), (b), and (c)(1) through (3) for equipment leaks, with the Notification of Compliance Status Reports required in subpart H included
in the Notification of Compliance Status Report required in this subpart.
comply with the notification requirements specified in § 63.1039(a) for
equipment leaks, with the Notification Compliance Status Reports required in subpart UU of this part included in the Notification of Compliance Status Report required in this subpart.
comply with the notification requirements specified in §§ 63.146(a) and
(b), 63.151, and 63.152(a)(1) through (3) and (b)(1) through (5) for
wastewater, with the Notification of Compliance Status Reports required in subpart G of this part included in the Notification of Compliance Status Report required in this subpart.
3. wish to use an alternative monitoring method .....................................
4. start up your affected source before June 11, 2002 ...........................
5. start up your new or reconstructed source on or after June 11, 2002
6. cannot comply with the relevant standard by the applicable compliance date.
7. are subject to special requirements as specified in § 63.6(b)(3) and
(4).
8. are required to conduct visible emission observations to determine
the compliance of flares as specified in § 63.11(b)(4).
9. are required to conduct a performance test or other initial compliance demonstration as specified in Table 3 to this subpart.
10. comply with the equipment leak requirements of subpart H of this
part for existing or new cellulose ether affected sources.
11. comply with the equipment leak requirements of subpart UU of this
part for existing or new cellulose ether affected sources.
12. comply with the wastewater requirements of subparts F and G of
this part for existing or new cellulose ether affected sources.
18. Table 8 to Subpart UUUU is
revised to read as follows:
■
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Table 8 to Subpart UUUU of Part 63—
Reporting Requirements
As required in § 63.5580, you must
submit the appropriate reports specified
in the following table:
You must submit a compliance report, which must contain the following information . . .
and you must submit the report . . .
1. if there are no deviations from any emission limit, operating limit, or work practice standard during the reporting period, then the report must contain the information specified in § 63.5580(c);.
semiannually as specified in § 63.5580(b); beginning on
[DATE 180 DAYS AFTER PUBLICATION OF FINAL
RULE IN THE FEDERAL REGISTER], submit all subsequent reports following the procedure specified in
§ 63.5580(g).
2. if there were no periods during which the CMS was out-of-control, then the report must contain the information specified in § 63.5580(c)(6);.
3. if there is a deviation from any emission limit, operating limit, or work practice
standard during the reporting period, then the report must contain the information specified in § 63.5580(c) and (d);.
4. if there were periods during which the CMS was out-of-control, then the report
must contain the information specified in § 63.5580(e);.
5. if prior to [DATE 180 DAYS AFTER PUBLICATION OF FINAL RULE IN THE
Federal Register], you had a startup, shutdown, or malfunction during the reporting period and you took actions consistent with your SSM plan, then the report must contain the information specified in § 63.10(d)(5)(i);.
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You must submit a compliance report, which must contain the following information . . .
and you must submit the report . . .
6. if prior to [DATE 180 DAYS AFTER PUBLICATION OF FINAL RULE IN THE
FEDERAL REGISTER], you had a startup, shutdown, or malfunction during the
reporting period and you took actions that are not consistent with your SSM
plan, then the report must contain the information specified in § 63.10(d)(5)(ii);.
7. the report must contain any change in information already provided, as specified in § 63.9(j);.
8. for cellulose ether affected sources complying with the equipment leak requirements of subpart H of this part, the report must contain the information specified in § 63.182(a)(3) and (6) and (d)(2) through (4);.
9. for cellulose ether affected sources complying with the equipment leak requirements of subpart UU of this part, the report must contain the information specified in § 63.1039(b);.
10. for cellulose ether affected sources complying with the wastewater requirements of subparts F and G of this part, the report must contain the information
specified in §§ 63.146(c) through (e) and 63.152(a)(4) and (5) and (c) through
(e);.
11. for affected sources complying with the closed-vent system provisions in
§ 63.148, the report must contain the information specified in § 63.148(j)(1);.
12. for affected sources complying with the bypass line provisions in § 63.148(f),
the report must contain the information specified in § 63.148(j)(2) and (3);.
13. for affected sources invoking the delay of repair provisions in § 63.104(e) for
heat exchanger systems, the next compliance report must contain the information in § 63.104(f)(2)(i) through (iv); if the leak remains unrepaired, the information must also be submitted in each subsequent compliance report until the repair of the leak is reported; and.
14. for storage vessels subject to the emission limits and work practice standards
in Table 1 to Subpart UUUU, the report must contain the periods of planned
routine maintenance during which the control device does not comply with the
emission limits or work practice standards in Table 1 to this subpart.
19. Table 9 to Subpart UUUU is
revised to read as follows:
Table 9 to Subpart UUUU of Part 63—
Recordkeeping Requirements
■
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As required in § 63.5585, you must
keep the appropriate records specified
in the following table:
If you operate . . .
then you must keep . . .
and the record(s) must contain . . .
1. an existing or new affected source ...............
a copy of each notification and report that you
submitted to comply with this subpart.
2. an existing or new affected source that commenced construction or reconstruction before September 9, 2019.
a. the records in § 63.6(e)(3)(iii) through (iv)
related to startup, shutdown, and malfunction prior to [DATE 180 DAYS AFTER
DATE OF PUBLICATION OF FINAL RULE
IN THE FEDERAL REGISTER].
all documentation supporting any Initial Notification or Notification of Compliance Status
Report that you submitted, according to the
requirements in § 63.10(b)(2)(xiv), and any
compliance report required under this subpart.
i. SSM plan;
ii. when actions taken during a startup, shutdown, or malfunction are consistent with the
procedures specified in the SSM plan,
records demonstrating that the procedures
specified in the plan were followed;
iii. records of the occurrence and duration of
each startup, shutdown, or malfunction; and
iv. when actions taken during a startup, shutdown, or malfunction are not consistent with
the procedures specified in the SSM plan,
records of the actions taken for that event.
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If you operate . . .
then you must keep . . .
and the record(s) must contain . . .
b. records related to startup and shutdown,
failures to meet the standard, and actions
taken to minimize emissions after [DATE
180 DAYS AFTER DATE OF PUBLICATION OF FINAL RULE IN THE FEDERAL
REGISTER].
i. record the date, time, and duration of each
startup and/or shutdown period, including
the periods when the affected source was
subject to the alternative operating parameters applicable to startup and shutdown;
ii. in the event that an affected unit fails to
meet an applicable standard, record the
number of failures. For each failure, record
the date, time and duration of each failure;
iii. for each failure to meet an applicable
standard, record and retain a list of the affected sources or equipment, an estimate of
the quantity of each regulated pollutant
emitted over any emission limit and a description of the method used to estimate the
emissions; and
iv. record actions taken to minimize emissions
in accordance with § 63.5515(b), and any
corrective actions taken to return the affected unit to its normal or usual manner of
operation.
i. record the date, time, and duration of each
startup and/or shutdown period, including
the periods when the affected source was
subject to alternative operating parameters
applicable to startup and shutdown;
ii. in the event that an affected unit fails to
meet an applicable standard, record the
number of failures. For each failure, record
the date, time and duration of each failure;
iii. for each failure to meet an applicable
standard, record and retain a list of the affected sources or equipment, an estimate of
the quantity of each regulated pollutant
emitted over any emission limit and a description of the method used to estimate the
emissions; and
iv. record actions taken to minimize emissions
in accordance with § 63.5515(b), and any
corrective actions taken to return the affected unit to its normal or usual manner of
operation.
i. information regarding the installation of the
CMS sampling source probe or other interface at a measurement location relative to
each affected process unit such that the
measurement is representative of control of
the exhaust emissions (e.g., on or downstream of the last control device);
ii. performance and equipment specifications
for the sample interface, the pollutant concentration or parametric signal analyzer,
and the data collection and reduction system;
iii. performance evaluation procedures and acceptance criteria (e.g., calibrations);
iv. ongoing operation and maintenance procedures in accordance with the general requirements of §§ 63.8(c)(3) and (4)(ii),
63.5515(b), and 63.5580(c)(6);
v. ongoing data quality assurance procedures
in accordance with the general requirements of § 63.8(d)(2); and
vi. ongoing recordkeeping and reporting procedures in accordance with the general requirements of §§ 63.10(c)(1)–(6), (c)(9)–
(14), (e)(1), and (e)(2)(i) and 63.5585.
all results of performance tests, CEMS performance evaluations, and any other initial
compliance demonstrations, including analysis of samples, determination of emissions,
and raw data.
3. a new or reconstructed affected source that
commenced construction or reconstruction
after September 9, 2019.
a. records related to startup and shutdown,
failures to meet the standard, and actions
taken to minimize emissions.
4. an existing or new affected source ...............
a. a site-specific monitoring plan .....................
5. an existing or new affected source ...............
records of performance tests and CEMS performance evaluations, as required in
§ 63.10(b)(2)(viii) and any other initial compliance demonstrations.
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If you operate . . .
then you must keep . . .
and the record(s) must contain . . .
6. an existing or new affected source ...............
a. records for each CEMS ...............................
i.
7. an existing or new affected source ...............
a. records for each CPMS ...............................
8. an existing or new cellulose ether affected
ether source.
9. an existing or new viscose process affected
source.
10. an existing or new viscose process affected source.
records of closed-loop systems .......................
11. an existing or new viscose process affected source.
records of calculations .....................................
12. an existing or new cellulose ether affected
source.
a. extended cookout records ............................
records of nitrogen unloading and storage
systems or nitrogen unloading systems.
records of material balances ............................
13. an existing or new cellulose ether affected
source.
a. equipment leak records ................................
14. an existing or new cellulose ether affected
source.
15. an existing or new affected source .............
16. an existing or new affected source .............
wastewater records ..........................................
closed-vent system records .............................
a. bypass line records ......................................
17. an existing or new affected source .............
heat exchanger system records .......................
18. an existing or new affected source .............
control device maintenance records ................
19. an existing or new affected source .............
safety device records .......................................
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records described in § 63.10(b)(2)(vi)
through (xi);
ii. previous (superseded) versions of the performance evaluation plan, with the program
of corrective action included in the plan required under § 63.8(d)(2);
iii. request for alternatives to relative accuracy
test for CEMS as required in § 63.8(f)(6)(i);
iv. records of the date and time that each deviation started and stopped, and whether
the deviation occurred during a period of
startup, shutdown, or malfunction or during
another period; and
v. records required in Table 6 to Subpart
UUUU to show continuous compliance with
the operating limit.
i. records required in Table 6 to Subpart
UUUU to show continuous compliance with
each operating limit that applies to you; and
ii. results of each CPMS calibration, validation
check,
and
inspection
required
by
§ 63.5545(b)(4).
records certifying that a closed-loop system is
in use for cellulose ether operations.
records of nitrogen unloading and storage
systems or nitrogen unloading systems
all pertinent data from the material balances
used to estimate the 6-month rolling average percent reduction in HAP emissions.
documenting the percent reduction in HAP
emissions using pertinent data from the material balances.
i. the amount of HAP charged to the reactor;
ii. the grade of product produced;
iii. the calculated amount of HAP remaining
before extended cookout; and
iv. information showing that extended cookout
was employed.
i. the records specified in § 63.181 for equipment leaks; or
ii. the records specified in 63.1038 for equipment leaks.
the records specified in §§ 63.105, 63.147,
and 63.152(f) and (g) for wastewater.
the records specified in § 63.148(i).
i. hourly records of flow indicator operation
and detection of any diversion during the
hour and records of all periods when the
vent stream is diverted from the control
stream or the flow indicator is not operating;
or
ii. the records of the monthly visual inspection
of the seal or closure mechanism and of all
periods when the seal mechanism is broken, the bypass line valve position has
changed, or the key for a lock-and-key type
lock has been checked out and records of
any car-seal that has broken.
records of the results of inspections and repair
according to source § 63.104(f)(1).
records of planned routine maintenance for
control devices used to comply with the percent reduction emission limit for storage
vessels in Table 1 to Subpart UUUU.
a record of each time a safety device is
opened to avoid unsafe conditions according to § 63.5505(d).
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20. Table 10 to Subpart UUUU is
revised to read as follows:
Table 10 to Subpart UUUU of Part 63—
Applicability of General Provisions to
Subpart UUUU
■
47399
appropriate General Provisions
requirements specified in the following
table:
As required in §§ 63.5515(h) and
63.5600, you must comply with the
Citation
Subject
§ 63.1 .........................................
Applicability ..............
§ 63.2 .........................................
§ 63.3 .........................................
§ 63.4 .........................................
§ 63.5 .........................................
§ 63.6(a) ....................................
§ 63.6(b)(1) through (4) .............
§ 63.6(b)(5) ................................
§ 63.6(b)(6) ................................
§ 63.6(b)(7) ................................
§ 63.6(c)(1) and (2) ...................
§ 63.6(c)(3) and (4) ...................
§ 63.6(c)(5) ................................
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§ 63.6(d) ....................................
§ 63.6(e)(1)(i) .............................
Initial applicability determination; applicability after standard established; permit
requirements; extensions, notifications.
Definitions ................ Definitions for part 63 standards ...............
Units and AbbreviaUnits and abbreviations for part 63 standtions.
ards.
Prohibited Activities
Prohibited activities; compliance date; cirand Circumvention.
cumvention, severability.
Preconstruction RePreconstruction review requirements of
view and Notificasection 112(i)(1).
tion Requirements.
Applicability .............. General provisions apply unless compliance extension; general provisions
apply to area sources that become
major.
Compliance Dates
Standards apply at effective date; 3 years
for New and Reafter effective date; upon startup; 10
constructed
years after construction or reconstrucsources.
tion commences for CAA section 112(f).
Notification ............... Must notify if commenced construction or
reconstruction after proposal.
[Reserved] ...............
Compliance Dates
Area sources that become major must
for New and Recomply with major source and standconstructed Area
ards immediately upon becoming major,
Sources That Beregardless of whether required to comcome Major.
ply when they were an area source.
Compliance Dates
Comply according to date in subpart,
for Existing
which must be no later than 3 years
Sources.
after effective date; for CAA section
112(f) standards, comply within 90 days
of effective date unless compliance extension.
[Reserved] ...............
Compliance Dates
Area sources that become major must
for Existing Area
comply with major source standards by
Sources That Bedate indicated in subpart or by equivacome Major.
lent time period (e.g., 3 years).
[Reserved] ...............
General Duty to Min- You must operate and maintain affected
imize Emissions..
source in a manner consistent with
safety and good air pollution control
practices for minimizing emissions.
§ 63.6(e)(1)(ii) ............................
Requirement to Correct Malfunctions
ASAP.
You must correct malfunctions as soon as
practicable after their occurrence.
§ 63.6(e)(1)(iii) ...........................
Operation and Maintenance Requirements.
Operation and maintenance requirements
are enforceable independent of emissions limitations or other requirements
in relevant standards.
§ 63.6(e)(2) ................................
[Reserved] ...............
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Brief description
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Yes.
Yes
Yes.
Yes.
Yes.
Yes.
Yes.
Yes.
Yes.
Yes.
Yes.
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019,
see § 63.5515 for general duty requirement. Yes, for all other affected sources
before [DATE 181 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN
THE FEDERAL REGISTER], and No
thereafter.
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN
THE FEDERAL REGISTER], and No
thereafter.
Yes.
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Citation
Brief description
Applies to
subpart UUUU
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN
THE FEDERAL REGISTER], and No
thereafter.
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN
THE FEDERAL REGISTER], and No
thereafter.
Yes.
§ 63.6(e)(3) ................................
Startup, Shutdown,
and Malfunction
Plan.
Requirement for startup, shutdown, and
malfunction and SSM plan; content of
SSM plan.
§ 63.6(f)(1) .................................
SSM Exemption .......
You must comply with emission standards
at all times except during SSM.
§ 63.6(f)(2) and (3) ....................
Compliance based on performance test,
operation and maintenance plans,
records, inspection.
§ 63.6(g)(1) through (3) .............
Methods for Determining Compliance/Finding of
Compliance.
Alternative Standard
§ 63.6(h)(1) ................................
SSM Exemption .......
§ 63.6(h)(2) through (9) .............
Opacity and Visible
Emission (VE)
Standards.
Compliance Extension.
Presidential Compliance Exemption.
§ 63.6(i)(1) through (16) ............
§ 63.6(j) .....................................
§ 63.7(a)(1) and (2) ...................
Performance Test
Dates.
§ 63.7(a)(3) ................................
Section 114 Authority.
Notification of Performance Test.
Notification of Rescheduling.
§ 63.7(b)(1) ................................
§ 63.7(b)(2) ................................
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§ 63.7(c) ....................................
Quality Assurance
and Test Plan.
§ 63.7(d) ....................................
§ 63.7(e)(1) ................................
Testing Facilities ......
Performance Testing
§ 63.7(e)(2) ................................
Conditions for Conducting Performance Tests.
Test Run Duration ...
§ 63.7(e)(3) ................................
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Procedures for getting an alternative
standard.
You must comply with opacity and visible
emission standards at all times except
during SSM.
Requirements for
emission limits.
opacity
and
visible
Procedures and criteria for Administrator
to grant compliance extension.
President may exempt source category
from requirement to comply with subpart.
Dates for conducting initial performance
test; testing and other compliance demonstrations; must conduct 180 days
after first subject to subpart.
Administrator may require a performance
test under CAA Section 114 at any time.
Must notify Administrator 60 days before
the test.
If rescheduling a performance test is necessary, must notify Administrator 5 days
before scheduled date of rescheduled
test.
Requirement to submit site-specific test
plan 60 days before the test or on date
Administrator agrees with; test plan approval procedures; performance audit
requirements; internal and external QA
procedures for testing.
Requirements for testing facilities .............
Performance tests must be conducted
under representative conditions; cannot
conduct performance tests during SSM;
not a violation to exceed standard during SSM.
Must conduct according to this subpart
and EPA test methods unless Administrator approves alternative.
Must have three test runs of at least 1
hour each; compliance is based on
arithmetic mean of three runs; conditions when data from an additional test
run can be used.
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Yes.
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources utilizing flares before [DATE 181 DAYS
AFTER DATE OF PUBLICATION OF
FINAL RULE IN THE FEDERAL REGISTER], and No thereafter.
Yes, but only for flares for which EPA
Method 22 observations are required
under § 63.11(b).
Yes.
Yes.
Yes.
Yes.
Yes.
Yes.
No.
Yes.
No, see § 63.5535 and Table 4.
Yes.
Yes.
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Citation
Alternative Test
Method.
§ 63.7(g) ....................................
Waiver of Tests .......
§ 63.8(a)(1) ................................
Applicability of Monitoring Requirements.
Performance Specifications.
[Reserved] ...............
Monitoring with
Flares.
Monitoring ................
§ 63.8(a)(3) ................................
§ 63.8(a)(4) ................................
§ 63.8(b)(1) ................................
Applies to
subpart UUUU
Brief description
§ 63.7(f) .....................................
§ 63.8(a)(2) ................................
Procedures by which Administrator can
grant approval to use an alternative test
method.
Procedures for Administrator to waive performance test.
Subject to all monitoring requirements in
standard.
Yes.
Performance specifications in Appendix B
of 40 CFR part 60 apply.
Yes.
Unless your subpart says otherwise, the
requirements for flares in § 63.11 apply.
Must conduct monitoring according to
standard unless Administrator approves
alternative.
Specific requirements for installing monitoring systems; must install on each effluent before it is combined and before
it is released to the atmosphere unless
Administrator approves otherwise; if
more than one monitoring system on an
emission point, must report all monitoring system results, unless one monitoring system is a backup.
Maintain monitoring system in a manner
consistent with good air pollution control
practices.
Yes.
Yes.
Yes.
Yes.
§ 63.8(b)(2) and (3) ...................
Multiple Effluents
and Multiple Monitoring Systems.
§ 63.8(c)(1) and (c)(1)(i) ............
General Duty to Minimize Emissions
and CMS Operation.
§ 63.8(c)(1)(ii) ............................
Parts for Routine Repairs.
Requirements to develop SSM Plan
for CMS.
Keep parts for routine repairs readily
available.
Develop a written SSM plan for CMS .......
§ 63.8(c)(2) and (3) ...................
Monitoring System
Installation.
§ 63.8(c)(4) ................................
Continuous Monitoring System
(CMS) Requirements.
Continuous Monitoring System
(CMS) Requirements.
Must install to get representative emission
of parameter measurements; must
verify operational status before or at
performance test.
CMS must be operating except during No. Replaced with language in § 63.5560.
breakdown, out-of control, repair, maintenance, and high-level calibration drifts.
§ 63.8(c)(1)(iii) ...........................
§ 63.8(c)(4)(i) and (ii) ................
§ 63.8(c)(5) ................................
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§ 63.8(c)(6) ................................
COMS Minimum
Procedures.
CMS Requirements
§ 63.8(c)(7) and (8) ...................
CMS Requirements
§ 63.8(d) ....................................
CMS Quality Control
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Continuous opacity monitoring systems
(COMS) must have a minimum of one
cycle of sampling and analysis for each
successive 10-second period and one
cycle of data recording for each successive 6-minute period; CEMS must have
a minimum of one cycle of operation for
each successive 15-minute period.
COMS minimum procedures .....................
Zero and high level calibration check requirements; out-of-control periods.
Out-of-control periods, including reporting
Requirements for CMS quality control, including calibration, etc.; must keep
quality control plan on record for 5
years; keep old versions for 5 years
after revisions; program of correction
action to be included in plan required
under § 63.8(d)(2)..
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Yes.
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER PUBLICATION OF FINAL RULE IN THE
FEDERAL REGISTER], and No thereafter.
Yes.
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN
THE FEDERAL REGISTER], and No
thereafter.
Yes.
Yes, except that § 63.8(c)(4)(i) does not
apply because subpart UUUU does not
require COMS.
No. Subpart UUUU does not require
COMS.
No. Replaced with language in § 63.5545.
No.
Replaced
with
language
§ 63.5580(c)(6).
No,
except
for
requirements
§ 63.8(d)(2).
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in
47402
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Citation
Brief description
Applies to
subpart UUUU
Yes, except that § 63.8(e)(5)(ii) does not
apply because subpart UUUU does not
require COMS.
Yes, except that no site-specific test plan
is required. The request to use an alternative monitoring method must be submitted with the notification of performance test or CEMS performance evaluation or 60 days prior to any initial
compliance demonstration.
Yes.
§ 63.8(e) ....................................
CMS Performance
Evaluation.
Notification, performance evaluation test
plan, reports.
§ 63.8(f)(1) through (5) ..............
Alternative Monitoring Method.
Procedures for Administrator to approve
alternative monitoring.
§ 63.8(f)(6) .................................
§ 63.8(g)(1) through (4) .............
Alternative to Relative Accuracy
Test.
Data Reduction ........
§ 63.8(g)(5) ................................
Data Reduction ........
§ 63.9(a) ....................................
Notification Requirements.
Initial Notifications ....
Procedures for Administrator to approve
alternative relative accuracy tests for
CEMS.
COMS 6-minute averages calculated over
at least 36 evenly spaced data points;
CEMS 1-hour averages computed over
at least four equally spaced data points;
data that cannot be used in average.
Data that cannot be used in computing
averages for CEMS and COMS.
Applicability and State delegation .............
§ 63.9(b)(1) through (5) .............
§ 63.9(c) ....................................
§ 63.9(d) ....................................
§ 63.9(e) ....................................
§ 63.9(f) .....................................
Request for Compliance Extension.
Notification of Special Compliance
Requirements for
New Source.
Notification of Performance Test.
Notification of VE or
Opacity Test.
§ 63.9(g) ....................................
Additional Notifications When Using
CMS.
§ 63.9(h)(1) through (6) .............
Notification of Compliance Status Report.
§ 63.9(i) .....................................
Adjustment of Submittal Deadlines.
§ 63.9(j) .....................................
Change in Previous
Information.
§ 63.10(a) ..................................
Recordkeeping and
Reporting.
§ 63.10(b)(1) ..............................
Recordkeeping and
Reporting.
Recordkeeping of
Occurrence and
Duration of
Startups and Shutdowns.
§ 63.10(b)(2)(i) ...........................
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Submit notification subject 120 days after
effective date; notification of intent to
construct or reconstruct; notification of
commencement of construction or reconstruction; notification of startup; contents of each.
Can request if cannot comply by date or if
installed BACT/LAER.
For sources that commence construction
between proposal and promulgation and
want to comply 3 years after effective
date.
Notify Administrator 60 days prior .............
Notify Administrator 30 days prior .............
Notification of performance evaluation; notification using COMS data; notification
that exceeded criterion for relative accuracy.
Contents; due 60 days after end of performance test or other compliance demonstration, except for opacity or VE,
which are due 30 days after; when to
submit to Federal vs. State authority.
Procedures for Administrator to approve
change in when notifications must be
submitted.
Must submit within 15 days after the
change.
Applies to all, unless compliance extension; when to submit to Federal vs.
State authority; procedures for owners
of more than one source.
General requirements; keep all records
readily available; keep for 5 years.
Records of occurrence and duration of
each startup or shutdown that causes
source to exceed emission limitation.
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No.
Replaced
§ 63.5545(e).
with
language
in
No.
Replaced
§ 63.5560(b).
Yes.
with
language
in
Yes.
Yes.
Yes.
Yes.
Yes, but only for flares for which EPA
Method 22 observations are required as
part of a flare compliance assessment.
Yes, except that § 63.9(g)(2) does not
apply because subpart UUUU does not
require COMS.
Yes.
Yes, except that the notification must be
submitted as part of the next semiannual compliance report, as specified
in Table 8 to this subpart.
Yes.
Yes.
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER PUBLICATION OF FINAL RULE IN THE
FEDERAL REGISTER], and No thereafter.
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Citation
Subject
Brief description
Applies to
subpart UUUU
§ 63.10(b)(2)(ii) ..........................
Recordkeeping of
Failures to Meet a
Standard.
Records of occurrence and duration of
each malfunction of operation or air pollution control and monitoring equipment.
§ 63.10(b)(2)(iii) .........................
Maintenance
Records.
§ 63.10(b)(2)(iv) and (v) ............
Actions Taken to
Minimize Emissions During SSM.
Records of maintenance performed on air
pollution control and monitoring equipment.
Records of actions taken during SSM to
minimize emissions.
No, see Table 9 for recordkeeping of (1)
date, time and duration; (2) listing of affected source or equipment, and an estimate of the quantity of each regulated
pollutant emitted over the standard; and
(3) actions to minimize emissions and
correct the failure.
Yes.
§ 63.10(b)(2)(vi), (x), and (xi) ....
CMS Records ..........
§ 63.10(b)(2)(vii) through (ix) ....
Records ...................
§ 63.10(b)(2)(xii) ........................
§ 63.10(b)(2)(xiii) .......................
Records ...................
Records ...................
§ 63.10(b)(2)(xiv) .......................
Records ...................
§ 63.10(b)(3) ..............................
§ 63.10(c)(1) through (6), (9)
through (14).
§ 63.10(c)(7) and (8) .................
Records ...................
Records ...................
Records ...................
§ 63.10(c)(15) ............................
Use of SSM Plan .....
§ 63.10(d)(1) ..............................
General Reporting
Requirements.
Report of Performance Test Results.
Requirement to report ...............................
§ 63.10(d)(3) ..............................
Reporting Opacity or
VE Observations.
What to report and when ...........................
§ 63.10(d)(4) ..............................
Progress Reports .....
§ 63.10(d)(5)(i) ...........................
Periodic SSM Reports.
Must submit progress reports on schedule
if under compliance extension.
Contents and submission of periodic SSM
reports.
§ 63.10(d)(2) ..............................
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Malfunctions, inoperative, out-of-control;
calibration checks, adjustments, maintenance.
Measurements to demonstrate compliance
with emission limits; performance test,
performance evaluation, and opacity/VE
observation results; measurements to
determine conditions of performance
tests and performance evaluations.
Records when under waiver ......................
Records when using alternative to relative
accuracy test.
All documentation supporting Initial Notification and Notification of Compliance
Status Report.
Applicability determinations .......................
Additional records for CMS .......................
Records of excess emissions and parameter monitoring exceedances for CMS.
Use SSM plan to satisfy recordkeeping requirements for identification of malfunction, correction action taken, and nature
of repairs to CMS.
When to submit to Federal or State authority.
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No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN
THE FEDERAL REGISTER], and No
thereafter.
Yes.
Yes, including results of EPA Method 22
observations required as part of a flare
compliance assessment.
Yes.
Yes.
Yes.
Yes.
Yes.
No. Replaced with language in Table 9 to
this subpart.
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN
THE FEDERAL REGISTER], and No
thereafter.
Yes.
Yes, except that Table 7 to this subpart
specifies the submittal date for the Notification of Compliance Status Report.
Yes, but only for flares for which EPA
Method 22 observations are required as
part of a flare compliance assessment.
Yes.
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN
THE FEDERAL REGISTER], and No
thereafter. See § 63.5580(c)(4) and
Table 8 for malfunction reporting requirements.
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Citation
Subject
Brief description
Applies to
subpart UUUU
§ 63.10(d)(5)(ii) ..........................
Immediate SSM Reports.
Contents and submission of immediate
SSM reports.
§ 63.10(e)(1) and (2) .................
Additional CMS Reports.
§ 63.10(e)(3)(i) through (iii) .......
Reports ....................
§ 63.10(e)(3)(iv) .........................
Excess Emissions
Reports.
§ 63.10(e)(3)(v) ..........................
Excess Emissions
Reports.
§ 63.10(e)(3)(vi) through (viii) ....
Excess Emissions
Report and Summary Report.
§ 63.10(e)(4) ..............................
Reporting COMS
Data.
Waiver for Recordkeeping or Reporting.
Control and Work
Practice Requirements.
State Authority and
Delegations.
Addresses ................
Must report results for each CEMS on a
unit; written copy of performance evaluation; three copies of COMS performance evaluation.
Schedule for reporting excess emissions
and parameter monitor exceedance
(now defined as deviations).
Requirement to revert to quarterly submission if there is an excess emissions and
parameter monitor exceedance (now
defined as deviations); provision to request semiannual reporting after compliance for 1 year; submit report by 30th
day following end of quarter or calendar
half; if there has not been an exceedance or excess emission (now defined
as deviations), report contents is a
statement that there have been no deviations.
Must submit report containing all of the information in § 63.10(c)(5) through (13),
§ 63.8(c)(7) and (8).
Requirements for reporting excess emissions for CMS (now called deviations);
requires all of the information in
§ 63.10(c)(5) through (13), § 63.8(c)(7)
and (8).
Must submit COMS data with performance test data.
Procedures for Administrator to waive ......
No, for new or reconstructed sources
which commenced construction or reconstruction after September 9, 2019.
Yes, for all other affected sources before [DATE 181 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN
THE FEDERAL REGISTER] except
that the immediate SSM report must be
submitted as part of the next semiannual compliance report, as specified
in Table 8 to this subpart, and No thereafter.
Yes, except that § 63.10(e)(2)(ii) does not
apply because subpart UUUU does not
require COMS.
§ 63.10(f) ...................................
§ 63.11 .......................................
§ 63.12 .......................................
§ 63.13 .......................................
§ 63.14 .......................................
§ 63.15 .......................................
§ 63.16 .......................................
Incorporations by
Reference.
Availability of Information and Confidentiality.
Performance Track
Provisions.
No. Replaced with language in § 63.5580.
No. Replaced with language in § 63.5580.
No. Replaced with language in § 63.5580.
No. Replaced with language in § 63.5580.
No. Subpart UUUU does not require
COMS.
Yes.
Requirements for flares and alternative
work practice for equipment leaks.
Yes.
State authority to enforce standards .........
Yes.
Addresses where reports, notifications,
and requests are sent.
Test methods incorporated by reference ..
Yes.
Yes.
Public and confidential information ...........
Yes.
Requirements for Performance
member facilities.
Yes.
Track
[FR Doc. 2019–18330 Filed 9–6–19; 8:45 am]
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Agencies
[Federal Register Volume 84, Number 174 (Monday, September 9, 2019)]
[Proposed Rules]
[Pages 47346-47404]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-18330]
[[Page 47345]]
Vol. 84
Monday,
No. 174
September 9, 2019
Part II
Environmental Protection Agency
-----------------------------------------------------------------------
40 CFR Part 63
National Emission Standards for Hazardous Air Pollutants for Cellulose
Products Manufacturing Residual Risk and Technology Review; Proposed
Rule
Federal Register / Vol. 84 , No. 174 / Monday, September 9, 2019 /
Proposed Rules
[[Page 47346]]
-----------------------------------------------------------------------
ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 63
EPA-HQ-OAR-2018-0415; FRL-9998-78-OAR]
RIN 2060-AU23
National Emission Standards for Hazardous Air Pollutants for
Cellulose Products Manufacturing Residual Risk and Technology Review
AGENCY: Environmental Protection Agency (EPA).
ACTION: Proposed rule.
-----------------------------------------------------------------------
SUMMARY: The U.S. Environmental Protection Agency (EPA) is proposing
amendments to the National Emissions Standards for Hazardous Air
Pollutants (NESHAP) for Cellulose Products Manufacturing to address the
results of the residual risk and technology review (RTR) that the EPA
is required to conduct under the Clean Air Act (CAA). The EPA is
proposing to amend provisions addressing periods of startup, shutdown,
and malfunction (SSM); to add provisions regarding periodic emissions
testing and electronic reporting; to provide more flexibility for
monitoring requirements; and to make technical and editorial changes.
While the proposed amendments would not result in reductions in
emissions of hazardous air pollutants (HAP), this action, if finalized,
would result in improved monitoring, compliance, and implementation of
the rule.
DATES: Comments. Comments must be received on or before October 24,
2019. Under the Paperwork Reduction Act (PRA), comments on the
information collection provisions are best assured of consideration if
the Office of Management and Budget (OMB) receives a copy of your
comments on or before October 9, 2019.
Public hearing. If anyone contacts us requesting a public hearing
on or before September 16, 2019, we will hold a hearing. Additional
information about the hearing, if requested, will be published in a
subsequent Federal Register document and posted at https://www.epa.gov/stationary-sources-air-pollution/cellulose-products-manufacturing-national-emission-standards. See SUPPLEMENTARY INFORMATION for
information on requesting and registering for a public hearing.
ADDRESSES: You may send comments, identified by Docket ID No. EPA-HQ-
OAR-2018-0415, by any of the following methods:
Federal eRulemaking Portal: https://www.regulations.gov/
(our preferred method). Follow the online instructions for submitting
comments.
Email: [email protected]. Include Docket ID No. EPA-
HQ-OAR-2018-0415 in the subject line of the message.
Fax: (202) 566-9744. Attention Docket ID No. EPA-HQ-OAR-
2018-0415.
Mail: U.S. Environmental Protection Agency, EPA Docket
Center, Docket ID No. EPA-HQ-OAR-2018-0415, Mail Code 28221T, 1200
Pennsylvania Avenue NW, Washington, DC 20460.
Hand/Courier Delivery: EPA Docket Center, WJC West
Building, Room 3334, 1301 Constitution Avenue NW, Washington, DC 20004.
The Docket Center's hours of operation are 8:30 a.m.-4:30 p.m., Monday-
Friday (except federal holidays).
Instructions: All submissions received must include the Docket ID
No. for this rulemaking. Comments received may be posted without change
to https://www.regulations.gov/, including any personal information
provided. For detailed instructions on sending comments and additional
information on the rulemaking process, see the SUPPLEMENTARY
INFORMATION section of this document.
FOR FURTHER INFORMATION CONTACT: For questions about this proposed
action, contact Dr. Kelley Spence, Sector Policies and Programs
Division (Mail Code: E143-03), Office of Air Quality Planning and
Standards, U.S. Environmental Protection Agency, Research Triangle
Park, North Carolina 27711; telephone number: (919) 541-3158; fax
number: (919) 541-0516; and email address: [email protected]. For
specific information regarding the risk modeling methodology, contact
Mr. James Hirtz, Health and Environmental Impacts Division (C539-02),
Office of Air Quality Planning and Standards, U.S. Environmental
Protection Agency, Research Triangle Park, North Carolina 27711;
telephone number: (919) 541-0881; and email address:
[email protected]. For questions about monitoring and testing
requirements, contact Ms. Theresa Lowe, Sector Policies and Programs
Division (D243-05), Office of Air Quality Planning and Standards, U.S.
Environmental Protection Agency, Research Triangle Park, North Carolina
27711; telephone number: (919) 541-4786; fax number: (919) 541-4991;
and email address: [email protected]. For information about the
applicability of the NESHAP to a particular entity, contact Ms. Maria
Malave, Office of Enforcement and Compliance Assurance, U.S.
Environmental Protection Agency, WJC South Building (Mail Code 2227A),
1200 Pennsylvania Avenue NW, Washington DC 20460; telephone number:
(202) 564-7027; and email address: [email protected].
SUPPLEMENTARY INFORMATION:
Public hearing. Please contact Ms. Virginia Hunt at (919) 541-0832
or by email at [email protected] to request a public hearing, to
register to speak at the public hearing, or to inquire as to whether a
public hearing will be held.
Docket. The EPA has established a docket for this rulemaking under
Docket ID No. EPA-HQ-OAR-2018-0415. All documents in the docket are
listed in Regulations.gov. Although listed, some information is not
publicly available, e.g., CBI (Confidential Business Information) or
other information whose disclosure is restricted by statute. Certain
other material, such as copyrighted material, is not placed on the
internet and will be publicly available only in hard copy. Publicly
available docket materials are available either electronically in
Regulations.gov or in hard copy at the EPA Docket Center, Room 3334,
WJC West Building, 1301 Constitution Avenue NW, Washington, DC. The
Public Reading Room is open from 8:30 a.m. to 4:30 p.m., Monday through
Friday, excluding legal holidays. The telephone number for the Public
Reading Room is (202) 566-1744, and the telephone number for the EPA
Docket Center is (202) 566-1742.
Instructions. Direct your comments to Docket ID No. EPA-HQ-OAR-
2018-0415. The EPA's policy is that all comments received will be
included in the public docket without change and may be made available
online at https://www.regulations.gov/, including any personal
information provided, unless the comment includes information claimed
to be CBI or other information whose disclosure is restricted by
statute. Do not submit information that you consider to be CBI or
otherwise protected through https://www.regulations.gov/ or email. This
type of information should be submitted by mail as discussed below.
The EPA may publish any comment received to its public docket.
Multimedia submissions (audio, video, etc.) must be accompanied by a
written comment. The written comment is considered the official comment
and should include discussion of all points you wish to make. The EPA
will generally not consider comments or comment contents located
outside of the
[[Page 47347]]
primary submission (i.e., on the Web, cloud, or other file sharing
system). For additional submission methods, the full EPA public comment
policy, information about CBI or multimedia submissions, and general
guidance on making effective comments, please visit https://www.epa.gov/dockets/commenting-epa-dockets.
The https://www.regulations.gov/ website allows you to submit your
comment anonymously, which means the EPA will not know your identity or
contact information unless you provide it in the body of your comment.
If you send an email comment directly to the EPA without going through
https://www.regulations.gov/, your email address will be automatically
captured and included as part of the comment that is placed in the
public docket and made available on the internet. If you submit an
electronic comment, the EPA recommends that you include your name and
other contact information in the body of your comment and with any
digital storage media you submit. If the EPA cannot read your comment
due to technical difficulties and cannot contact you for clarification,
the EPA may not be able to consider your comment. Electronic files
should not include special characters or any form of encryption and be
free of any defects or viruses. For additional information about the
EPA's public docket, visit the EPA Docket Center homepage at https://www.epa.gov/dockets.
Submitting CBI. Do not submit information containing CBI to the EPA
through https://www.regulations.gov/ or email. Clearly mark the part or
all of the information that you claim to be CBI. For CBI information on
any digital storage media that you mail to the EPA, mark the outside of
the digital storage media as CBI and then identify electronically
within the digital storage media the specific information that is
claimed as CBI. In addition to one complete version of the comments
that includes information claimed as CBI, you must submit a copy of the
comments that does not contain the information claimed as CBI directly
to the public docket through the procedures outlined in Instructions
above. If you submit any digital storage media that does not contain
CBI, mark the outside of the digital storage media clearly that it does
not contain CBI. Information not marked as CBI will be included in the
public docket and the EPA's electronic public docket without prior
notice. Information marked as CBI will not be disclosed except in
accordance with procedures set forth in 40 Code of Federal Regulations
(CFR) part 2. Send or deliver information identified as CBI only to the
following address: OAQPS Document Control Officer (C404-02), OAQPS,
U.S. Environmental Protection Agency, Research Triangle Park, North
Carolina 27711, Attention Docket ID No. EPA-HQ-OAR-2018-0415.
Preamble acronyms and abbreviations. We use multiple acronyms and
terms in this preamble. While this list may not be exhaustive, to ease
the reading of this preamble and for reference purposes, the EPA
defines the following terms and acronyms here:
%R percent recovery
ADI Applicability Determination Index
AEGL acute exposure guideline level
AERMOD air dispersion model used by the HEM-3 model
ASTM American Society for Testing and Materials
CAA Clean Air Act
CalEPA California EPA
CBI Confidential Business Information
CDX Central Data Exchange
CEDRI Compliance and Emissions Data Reporting Interface
CEMS continuous emissions monitoring system
CEP Cellulose Ethers Production
CFR Code of Federal Regulations
CMC carboxymethyl cellulose
COS carbonyl sulfide
CS2 carbon disulfide
EPA Environmental Protection Agency
ERPG Emergency Response Planning Guideline
ERT Electronic Reporting Tool
FTIR Fourier Transform Infrared
GACT generally available control technology
H2S hydrogen sulfide
HAP hazardous air pollutant(s)
HCl hydrochloric acid
HEC hydroxyethyl cellulose
HEM-3 Human Exposure Model-3
HF hydrogen fluoride
HI hazard index
HPC hydroxypropyl cellulose
HPMC hydroxypropyl methyl cellulose
HQ hazard quotient
IBR incorporation by reference
ICR information collection request
ID identifier
IRIS Integrated Risk Information System
km kilometers
km\2\ square kilometers
MACT maximum achievable control technology
MC methyl cellulose
mg/kg-day milligrams per kilogram per day
mg/m\3\ milligrams per cubic meter
MIR maximum individual risk
MVP Miscellaneous Viscose Processes
NAAQS National Ambient Air Quality Standards
NAICS North American Industry Classification System
NaOH sodium hydroxide
NATA National Air Toxics Assessment
NESHAP national emission standards for hazardous air pollutants
NRC National Research Council
NTTAA National Technology Transfer and Advancement Act
OAQPS Office of Air Quality Planning and Standards
OECA Office of Enforcement and Compliance Assurance
OMB Office of Management and Budget
PAH polycyclic aromatic hydrocarbons
PB-HAP hazardous air pollutants known to be persistent and bio-
accumulative in the environment
PDF portable document format
PM particulate matter
POM polycyclic organic matter
ppm parts per million
PRA Paperwork Reduction Act
QA quality assurance
RBLC Reasonably Available Control Technology/Best Available Control
Technology/Lowest Achievable Emission Limits Clearinghouse
REL reference exposure level
RFA Regulatory Flexibility Act
RfC reference concentration
RfD reference dose
RTR residual risk and technology review
SAB Science Advisory Board
SBA Small Business Administration
SCC source classification code
SSM startup, shutdown, and malfunction
TOSHI target organ-specific hazard index
tpy tons per year
TRIM.FaTE Total Risk Integrated Methodology.Fate, Transport, and
Ecological Exposure model
UF uncertainty factor
[micro]g/m\3\ microgram per cubic meter
UMRA Unfunded Mandates Reform Act
URE unit risk estimate
USGS United States Geological Survey
VCS voluntary consensus standards
VOC volatile organic compounds
Organization of this document. The information in this preamble is
organized as follows:
I. General Information
A. Does this action apply to me?
B. Where can I get a copy of this document and other related
information?
II. Background
A. What is the statutory authority for this action?
B. What is this source category and how does the current NESHAP
regulate its HAP emissions?
C. What data collection activities were conducted to support
this action?
D. What other relevant background information and data are
available?
III. Analytical Procedures and Decision-Making
A. How do we consider risk in our decision-making under CAA
section 112(f)(2)?
B. How do we perform the technology review?
C. How do we estimate post-MACT risk posed by the source
category?
IV. Analytical Results and Proposed Decisions
A. What are the results of the risk assessment and analyses?
B. What are our proposed decisions regarding risk acceptability,
ample margin of safety, and adverse environmental effect?
[[Page 47348]]
C. What are the results and proposed decisions based on our
technology review?
D. What other actions are we proposing?
E. What compliance dates are we proposing?
V. Summary of Cost, Environmental, and Economic Impacts
A. What are the affected sources?
B. What are the air quality impacts?
C. What are the cost impacts?
D. What are the economic impacts?
E. What are the benefits?
VI. Request for Comments
VII. Submitting Data Corrections
VIII. Statutory and Executive Order Reviews
A. Executive Order 12866: Regulatory Planning and Review and
Executive Order 13563: Improving Regulation and Regulatory Review
B. Executive Order 13771: Reducing Regulation and Controlling
Regulatory Costs
C. Paperwork Reduction Act (PRA)
D. Regulatory Flexibility Act (RFA)
E. Unfunded Mandates Reform Act (UMRA)
F. Executive Order 13132: Federalism
G. Executive Order 13175: Consultation and Coordination With
Indian Tribal Governments
H. Executive Order 13045: Protection of Children From
Environmental Health Risks and Safety Risks
I. Executive Order 13211: Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution, or Use
J. National Technology Transfer and Advancement Act (NTTAA) and
1 CFR part 51
K. Executive Order 12898: Federal Actions To Address
Environmental Justice in Minority Populations and Low-Income
Populations
I. General Information
A. Does this action apply to me?
Table 1 of this preamble lists the NESHAP and associated regulated
industrial source categories that are the subject of this proposal.
Table 1 is not intended to be exhaustive, but rather provides a guide
for readers regarding the entities that this proposed action is likely
to affect. The proposed standards, once promulgated, will be directly
applicable to the affected sources. This proposed action will not
affect federal, state, local, and tribal government entities. The
Initial List of Categories of Sources Under Section 112(c)(1) of the
Clean Air Act Amendments of 1990 (see 57 FR 31576, July 16, 1992) and
Documentation for Developing the Initial Source Category List, Final
Report (see EPA-450/3-91-030, July 1992) included separate source
categories for the various cellulose products manufacturing industries.
The source categories on the initial list were Cellulose Food Casings,
Rayon, Cellophane, Methyl Cellulose, Carboxymethyl Cellulose, and
Cellulose Ethers Production. The Cellulose Ethers Production source
category on the initial list included the hydroxyethyl cellulose,
hydroxypropyl cellulose, and hydroxypropyl methyl cellulose industries.
In developing the original proposed rule for Cellulose Products
Manufacturing, we identified another cellulose products manufacturing
industry, Cellulosic Sponge Manufacturing, that was not on the initial
source category list. We added Cellulosic Sponge Manufacturing to the
source category list on November 18, 1999 (64 FR 63026) in accordance
with section 112(c) of the CAA. When the EPA proposed the Cellulose
Products Manufacturing NESHAP on August 28, 2000 (65 FR 52166), the
Cellulose Food Casings, Rayon, Cellophane, and Cellulosic Sponge
Manufacturing source categories were combined to create a new source
category called ``Miscellaneous Viscose Processes.'' At the same time,
we combined the Methyl Cellulose, Carboxymethyl Cellulose, and
Cellulose Ethers Production source categories to create a newly
expanded ``Cellulose Ethers Production'' source category. On February
12, 2002 (67 FR 6521), we published an updated source category list
that included the Miscellaneous Viscose Processes (MVP) and Cellulose
Ethers Production (CEP) source categories.
Table 1--NESHAP and Industrial Source Categories Affected by This
Proposed Action
------------------------------------------------------------------------
Source category NESHAP NAICS code \1\
------------------------------------------------------------------------
Miscellaneous Viscose Cellulose 325211, 325220,
Processes. Products 326121, 326199.
Manufacturing.
Cellulose Ethers Production... Cellulose 325199.
Products
Manufacturing.
------------------------------------------------------------------------
\1\ North American Industry Classification System.
B. Where can I get a copy of this document and other related
information?
In addition to being available in the docket, an electronic copy of
this action is available on the internet. Following signature by the
EPA Administrator, the EPA will post a copy of this proposed action at
https://www.epa.gov/cellulose-products-manufacturing-national-emission-standards. Following publication in the Federal Register, the EPA will
post the Federal Register version of the proposal and key technical
documents at this same website. Information on the overall RTR program
is available at https://www3.epa.gov/ttn/atw/rrisk/rtrpg.html.
A redline version of the regulatory language that incorporates the
proposed changes in this action is available in the docket for this
action (Docket ID No. EPA-HQ-OAR-2018-0415).
II. Background
A. What is the statutory authority for this action?
The statutory authority for this action is provided by sections 112
and 301 of the CAA, as amended (42 U.S.C. 7401 et seq.). Section 112 of
the CAA establishes a two-stage regulatory process to develop standards
for emissions of HAP from stationary sources. Generally, the first
stage involves establishing technology-based standards and the second
stage involves evaluating those standards that are based on maximum
achievable control technology (MACT) to determine whether additional
standards are needed to address any remaining risk associated with HAP
emissions. This second stage is commonly referred to as the ``residual
risk review.'' In addition to the residual risk review, the CAA also
requires the EPA to review standards set under CAA section 112 every 8
years to determine if there are ``developments in practices, processes,
or control technologies'' that may be appropriate to incorporate into
the standards. This review is commonly referred to as the ``technology
review.'' When the two reviews are combined into a single rulemaking,
it is commonly referred to as the ``risk and technology review.'' The
discussion that follows identifies the most relevant statutory sections
and briefly explains the contours of the methodology used to implement
these statutory requirements. A more comprehensive discussion appears
in the document titled CAA Section 112 Risk and Technology Reviews:
Statutory Authority and Methodology, in the docket for this rulemaking.
In the first stage of the CAA section 112 standard setting process,
the EPA
[[Page 47349]]
promulgates technology-based standards under CAA section 112(d) for
categories of sources identified as emitting one or more of the HAP
listed in CAA section 112(b). Sources of HAP emissions are either major
sources or area sources, and CAA section 112 establishes different
requirements for major source standards and area source standards.
``Major sources'' are those that emit or have the potential to emit 10
tons per year (tpy) or more of a single HAP or 25 tpy or more of any
combination of HAP. All other sources are ``area sources.'' For major
sources, CAA section 112(d)(2) provides that the technology-based
NESHAP must reflect the maximum degree of emission reductions of HAP
achievable (after considering cost, energy requirements, and non-air
quality health and environmental impacts). These standards are commonly
referred to as MACT standards. CAA section 112(d)(3) also establishes a
minimum control level for MACT standards, known as the MACT ``floor.''
The EPA must also consider control options that are more stringent than
the floor. Standards more stringent than the floor are commonly
referred to as beyond-the-floor standards. In certain instances, as
provided in CAA section 112(h), the EPA may set work practice standards
where it is not feasible to prescribe or enforce a numerical emission
standard. For area sources, CAA section 112(d)(5) gives the EPA
discretion to set standards based on generally available control
technologies or management practices (GACT standards) in lieu of MACT
standards.
The second stage in standard-setting focuses on identifying and
addressing any remaining (i.e., ``residual'') risk according to CAA
section 112(f). For source categories subject to MACT standards,
section 112(f)(2) of the CAA requires the EPA to determine whether
promulgation of additional standards is needed to provide an ample
margin of safety to protect public health or to prevent an adverse
environmental effect. Section 112(d)(5) of the CAA provides that this
residual risk review is not required for categories of area sources
subject to GACT standards. Section 112(f)(2)(B) of the CAA further
expressly preserves the EPA's use of the two-step approach for
developing standards to address any residual risk and the Agency's
interpretation of ``ample margin of safety'' developed in the National
Emissions Standards for Hazardous Air Pollutants: Benzene Emissions
from Maleic Anhydride Plants, Ethylbenzene/Styrene Plants, Benzene
Storage Vessels, Benzene Equipment Leaks, and Coke By-Product Recovery
Plants (Benzene NESHAP) (54 FR 38044, September 14, 1989). The EPA
notified Congress in the Risk Report that the Agency intended to use
the Benzene NESHAP approach in making CAA section 112(f) residual risk
determinations (EPA-453/R-99-001, p. ES-11). The EPA subsequently
adopted this approach in its residual risk determinations and the
United States Court of Appeals for the District of Columbia Circuit
(the Court) upheld the EPA's interpretation that CAA section 112(f)(2)
incorporates the approach established in the Benzene NESHAP. See NRDC
v. EPA, 529 F.3d 1077, 1083 (DC Cir. 2008).
The approach incorporated into the CAA and used by the EPA to
evaluate residual risk and to develop standards under CAA section
112(f)(2) is a two-step approach. In the first step, the EPA determines
whether risks are acceptable. This determination ``considers all health
information, including risk estimation uncertainty, and includes a
presumptive limit on maximum individual lifetime [cancer] risk (MIR)
\1\ of approximately 1 in 10 thousand.'' 54 FR 38045, September 14,
1989. If risks are unacceptable, the EPA must determine the emissions
standards necessary to reduce risk to an acceptable level without
considering costs. In the second step of the approach, the EPA
considers whether the emissions standards provide an ample margin of
safety to protect public health ``in consideration of all health
information, including the number of persons at risk levels higher than
approximately 1 in 1 million, as well as other relevant factors,
including costs and economic impacts, technological feasibility, and
other factors relevant to each particular decision.'' Id. The EPA must
promulgate emission standards necessary to provide an ample margin of
safety to protect public health or determine that the standards being
reviewed provide an ample margin of safety without any revisions. After
conducting the ample margin of safety analysis, we consider whether a
more stringent standard is necessary to prevent, taking into
consideration costs, energy, safety, and other relevant factors, an
adverse environmental effect.
---------------------------------------------------------------------------
\1\ Although defined as ``maximum individual risk,'' MIR refers
only to cancer risk. MIR, one metric for assessing cancer risk, is
the estimated risk if an individual were exposed to the maximum
level of a pollutant for a lifetime.
---------------------------------------------------------------------------
CAA section 112(d)(6) separately requires the EPA to review
standards promulgated under CAA section 112 and revise them ``as
necessary (taking into account developments in practices, processes,
and control technologies)'' no less often than every 8 years. In
conducting this review, which we call the ``technology review,'' the
EPA is not required to recalculate the MACT floor. Natural Resources
Defense Council (NRDC) v. EPA, 529 F.3d 1077, 1084 (D.C. Cir. 2008).
Association of Battery Recyclers, Inc. v. EPA, 716 F.3d 667 (D.C. Cir.
2013). The EPA may consider cost in deciding whether to revise the
standards pursuant to CAA section 112(d)(6).
B. What is this source category and how does the current NESHAP
regulate its HAP emissions?
The MVP source category includes any facility engaged in the
production of cellulose food casings, rayon, cellophane, or cellulosic
sponges, which includes the following process steps: Production of
alkali cellulose from cellulose and sodium hydroxide (NaOH); production
of sodium cellulose xanthate from alkali cellulose and carbon disulfide
(CS2) (xanthation); production of viscose from sodium
cellulose xanthate and NaOH solution; regeneration of liquid viscose
into solid cellulose; \2\ and washing of the solid cellulose product
(see 65 FR 52171-2, August 28, 2000). It should be noted that, while
the current Cellulose Products Manufacturing NESHAP includes standards
for rayon manufacturing, all rayon plants in the United States have
shut down since promulgation of the original rule.
---------------------------------------------------------------------------
\2\ The MVP operations use different methods and equipment to
complete the regeneration step. Cellulose food casing operations
extrude viscose through a die, forming a tube, while rayon
operations extrude viscose through spinnerets, forming thin strands.
Cellophane operations extrude viscose through a long slit, forming a
flat sheet, while cellulosic sponge operations feed a mixture of
viscose and Glauber's salt into a sponge mold.
---------------------------------------------------------------------------
The CEP source category includes any facility engaged in the
production of carboxymethyl cellulose (CMC), hydroxyethyl cellulose
(HEC), hydroxypropyl cellulose (HPC), methyl cellulose (MC), or
hydroxypropyl methyl cellulose (HPMC), which includes the following
process steps: Production of alkali cellulose from cellulose and NaOH;
reaction of the alkali cellulose with one or more organic chemicals to
produce a cellulose ether product; \3\ washing and purification of the
cellulose ether product; and drying of the cellulose ether product (see
65 FR 52171, August 28, 2000).
---------------------------------------------------------------------------
\3\ To produce CMC, HEC, HPC, MC, and HPMC, alkali cellulose is
reacted with chloroacetic acid, ethylene oxide, propylene oxide,
methyl chloride, and a combination of methyl chloride and propylene
oxide, respectively.
---------------------------------------------------------------------------
[[Page 47350]]
This proposal includes both a residual risk assessment and a
technology review of the emission sources subject to the Cellulose
Products Manufacturing NESHAP. The NESHAP requires MVP operations to
reduce the total sulfide emissions from their process vents and control
the CS2 emissions from their CS2 unloading and
storage operations. It also requires cellophane operations to reduce
the toluene emissions from their solvent coating operations and toluene
storage vessels. The NESHAP requires CEP operations to control the HAP
emissions from their process vents, wastewater, equipment leaks, and
liquid streams in open systems. The NESHAP requires both MVP and CEP
operations to comply with work practice standards for closed-vent
systems and heat exchanger systems. The NESHAP also includes various
operating limits, initial and continuous compliance requirements, and
recordkeeping and reporting requirements for the MVP and CEP source
categories.
C. What data collection activities were conducted to support this
action?
On June 8, 2018, the EPA sent out a survey to the cellulose
products manufacturing industry to gather information needed to conduct
the regulatory reviews required under CAA sections 112(d)(6) and
112(f)(2). The EPA divided the survey into two parts. Part 1 requested
updated inventory data for emission sources subject to 40 CFR part 63,
subpart UUUU, to support the residual risk assessment for the two
source categories for purposes of detailed residual risk modeling. Part
2 requested available information on process equipment, control
devices, and other pertinent information to support the 40 CFR part 63,
subpart UUUU, technology review. The response rate for the survey was
100 percent. For more details on the data collection conducted to
prepare inputs for the residual risk assessment, see the memorandum
titled Preparation of the Residual Risk Modeling Input File for Subpart
UUUU, in the docket for this rulemaking. For more details on the data
collection conducted for the technology review, see the memorandum
titled Technology Review for the Cellulose Products Manufacturing
Source Category--Proposed Rule, also available in the docket.
D. What other relevant background information and data are available?
In addition to survey data provided by the regulated facilities,
the EPA reviewed a number of other information sources to determine if
there have been developments in practices, processes, or control
technologies by cellulose products manufacturing facilities to support
the technology review. These information sources include:
Emissions data (e.g., stack test reports and continuous
emissions monitoring system (CEMS) data) submitted with survey
responses;
Facility operating permits submitted with survey responses
and collected from state agencies;
Semiannual compliance reports submitted with survey
responses;
Other documentation submitted with survey responses (e.g.,
compliance calculations; process flow diagrams; Safety Data Sheets;
information on monitoring, wastewater, and equipment leaks);
Information on air pollution control options utilized by
the industry from the EPA's Reasonably Available Control Technology/
Best Available Control Technology/Lowest Achievable Emission Limits
Clearinghouse (RBLC);
Information on applicability and compliance issues from
the EPA's Applicability Determination Index (ADI); and
Literature review of recent information on MVP and CEP
practices, processes, and control technologies.
III. Analytical Procedures and Decision-Making
In this section, we describe the analyses performed to support the
proposed decisions for the RTR and other issues addressed in this
proposal.
A. How do we consider risk in our decision-making under CAA section
112(f)(2)?
As discussed in section II.A of this preamble and in the Benzene
NESHAP, in evaluating and developing standards under CAA section
112(f)(2), we apply a two-step approach to determine whether or not
risks are acceptable and to determine if the standards provide an ample
margin of safety to protect public health. As explained in the Benzene
NESHAP, ``the first step judgment on acceptability cannot be reduced to
any single factor'' and, thus, ``[t]he Administrator believes that the
acceptability of risk under section 112 is best judged on the basis of
a broad set of health risk measures and information.'' 54 FR 38046,
September 14, 1989. Similarly, with regard to the ample margin of
safety determination, ``the Agency again considers all of the health
risk and other health information considered in the first step. Beyond
that information, additional factors relating to the appropriate level
of control will also be considered, including cost and economic impacts
of controls, technological feasibility, uncertainties, and any other
relevant factors.'' Id.
The Benzene NESHAP approach provides flexibility regarding factors
the EPA may consider in making determinations and how the EPA may weigh
those factors for each source category. The EPA conducts a risk
assessment that provides estimates of the MIR posed by the HAP
emissions from each source in the source category, the hazard index
(HI) for chronic exposures to HAP with the potential to cause noncancer
health effects, and the hazard quotient (HQ) for acute exposures to HAP
with the potential to cause noncancer health effects.\4\ The assessment
also provides estimates of the distribution of cancer risk within the
exposed populations, cancer incidence, and an evaluation of the
potential for an adverse environmental effect. The scope of the EPA's
risk analysis is consistent with the EPA's response to comments on our
policy under the Benzene NESHAP where the EPA explained that:
---------------------------------------------------------------------------
\4\ The MIR is defined as the cancer risk associated with a
lifetime of exposure at the highest concentration of HAP where
people are likely to live. The HQ is the ratio of the potential HAP
exposure concentration to the noncancer dose-response value; the HI
is the sum of HQs for HAP that affect the same target organ or organ
system.
``[t]he policy chosen by the Administrator permits consideration of
multiple measures of health risk. Not only can the MIR figure be
considered, but also incidence, the presence of non-cancer health
effects, and the uncertainties of the risk estimates. In this way,
the effect on the most exposed individuals can be reviewed as well
as the impact on the general public. These factors can then be
weighed in each individual case. This approach complies with the
Vinyl Chloride mandate that the Administrator ascertain an
acceptable level of risk to the public by employing his expertise to
assess available data. It also complies with the Congressional
intent behind the CAA, which did not exclude the use of any
particular measure of public health risk from the EPA's
consideration with respect to CAA section 112 regulations, and
thereby implicitly permits consideration of any and all measures of
health risk which the Administrator, in his judgment, believes are
---------------------------------------------------------------------------
appropriate to determining what will `protect the public health'.''
See 54 FR 38057, September 14, 1989. Thus, the level of the MIR is
only one factor to be weighed in determining acceptability of risk. The
Benzene NESHAP explained that ``an MIR of approximately one in 10
thousand should ordinarily be the upper end of the range of
acceptability. As risks increase above this benchmark, they become
presumptively less acceptable under CAA section 112, and would be
weighed with the other health risk measures and information in making
an
[[Page 47351]]
overall judgment on acceptability. Or, the Agency may find, in a
particular case, that a risk that includes an MIR less than the
presumptively acceptable level is unacceptable in the light of other
health risk factors.'' Id. at 38045. In other words, risks that include
an MIR above 100-in-1 million may be determined to be acceptable, and
risks with an MIR below that level may be determined to be
unacceptable, depending on all of the available health information.
Similarly, with regard to the ample margin of safety analysis, the EPA
stated in the Benzene NESHAP that: ``EPA believes the relative weight
of the many factors that can be considered in selecting an ample margin
of safety can only be determined for each specific source category.
This occurs mainly because technological and economic factors (along
with the health-related factors) vary from source category to source
category.'' Id. at 38061. We also consider the uncertainties associated
with the various risk analyses, as discussed earlier in this preamble,
in our determinations of acceptability and ample margin of safety.
The EPA notes that it has not considered certain health information
to date in making residual risk determinations. At this time, we do not
attempt to quantify the HAP risk that may be associated with emissions
from other facilities that do not include the source categories under
review, mobile source emissions, natural source emissions, persistent
environmental pollution, or atmospheric transformation in the vicinity
of the sources in the categories.
The EPA understands the potential importance of considering an
individual's total exposure to HAP in addition to considering exposure
to HAP emissions from the source category and facility. We recognize
that such consideration may be particularly important when assessing
noncancer risk, where pollutant-specific exposure health reference
levels (e.g., reference concentrations (RfCs)) are based on the
assumption that thresholds exist for adverse health effects. For
example, the EPA recognizes that, although exposures attributable to
emissions from a source category or facility alone may not indicate the
potential for increased risk of adverse noncancer health effects in a
population, the exposures resulting from emissions from the facility in
combination with emissions from all of the other sources (e.g., other
facilities) to which an individual is exposed may be sufficient to
result in an increased risk of adverse noncancer health effects. In May
2010, the Science Advisory Board (SAB) advised the EPA ``that RTR
assessments will be most useful to decision makers and communities if
results are presented in the broader context of aggregate and
cumulative risks, including background concentrations and contributions
from other sources in the area.'' \5\
---------------------------------------------------------------------------
\5\ Recommendations of the SAB Risk and Technology Review Panel
are provided in their report, which is available at: https://
yosemite.epa.gov/sab/sabproduct.nsf/
4AB3966E263D943A8525771F00668381/$File/EPA-SAB-10-007-unsigned.pdf.
---------------------------------------------------------------------------
In response to the SAB recommendations, the EPA incorporates
cumulative risk analyses into its RTR risk assessments, including those
reflected in this proposal. The Agency (1) conducts facility-wide
assessments, which include source category emission points, as well as
other emission points within the facilities; (2) combines exposures
from multiple sources in the same category that could affect the same
individuals; and (3) for some persistent and bioaccumulative
pollutants, analyzes the ingestion route of exposure. In addition, the
RTR risk assessments consider aggregate cancer risk from all
carcinogens and aggregated noncancer HQs for all noncarcinogens
affecting the same target organ or target organ system.
Although we are interested in placing source category and facility-
wide HAP risk in the context of total HAP risk from all sources
combined in the vicinity of each source, we are concerned about the
uncertainties of doing so. Estimates of total HAP risk from emission
sources other than those that we have studied in depth during this RTR
review would have significantly greater associated uncertainties than
the source category or facility-wide estimates. Such aggregate or
cumulative assessments would compound those uncertainties, making the
assessments too unreliable.
B. How do we perform the technology review?
Our technology review focuses on the identification and evaluation
of developments in practices, processes, and control technologies that
have occurred since the MACT standards were promulgated. Where we
identify such developments, we analyze their technical feasibility,
estimated costs, energy implications, and non-air environmental
impacts. We also consider the emission reductions associated with
applying each development. This analysis informs our decision of
whether it is ``necessary'' to revise the emissions standards. In
addition, we consider the appropriateness of applying controls to new
sources versus retrofitting existing sources. For this exercise, we
consider any of the following to be a ``development'':
Any add-on control technology or other equipment that was
not identified and considered during development of the original MACT
standards;
Any improvements in add-on control technology or other
equipment (that were identified and considered during development of
the original MACT standards) that could result in additional emissions
reduction;
Any work practice or operational procedure that was not
identified or considered during development of the original MACT
standards;
Any process change or pollution prevention alternative
that could be broadly applied to the industry and that was not
identified or considered during development of the original MACT
standards; and
Any significant changes in the cost (including cost
effectiveness) of applying controls (including controls the EPA
considered during the development of the original MACT standards).
In addition to reviewing the practices, processes, and control
technologies that were considered at the time we originally developed
the NESHAP, we review a variety of data sources in our investigation of
potential practices, processes, or controls to consider. See sections
II.C and II.D of this preamble for information on the specific data
sources that were reviewed as part of the technology review.
C. How do we estimate post-MACT risk posed by the source category?
In this section, we provide a complete description of the types of
analyses that we generally perform during the risk assessment process.
In some cases, we do not perform a specific analysis because it is not
relevant. For example, in the absence of emissions of HAP known to be
persistent and bioaccumulative in the environment (PB-HAP), we would
not perform a multipathway exposure assessment. Where we do not perform
an analysis, we state that we do not and provide the reason. While we
present all of our risk assessment methods, we only present risk
assessment results for the analyses actually conducted (see section
IV.A of this preamble).
The EPA conducts a risk assessment that provides estimates of the
MIR for cancer posed by the HAP emissions from each source in the
source category, the HI for chronic exposures to HAP with the potential
to cause noncancer
[[Page 47352]]
health effects, and the HQ for acute exposures to HAP with the
potential to cause noncancer health effects. The assessment also
provides estimates of the distribution of cancer risk within the
exposed populations, cancer incidence, and an evaluation of the
potential for an adverse environmental effect. The seven sections that
follow this paragraph describe how we estimated emissions and conducted
the risk assessment. The docket for this rulemaking contains the
following documents which provide more information on the risk
assessment inputs and models: Residual Risk Assessment for the
Miscellaneous Viscose Processes Source Category in Support of the 2019
Risk and Technology Review Proposed Rule and Residual Risk Assessment
for the Cellulose Ethers Production Source Category in Support of the
2019 Risk and Technology Review Proposed Rule. The methods used to
assess risk (as described in the eight primary steps below) are
consistent with those described by the EPA in the document reviewed by
a panel of the EPA's SAB in 2009; \6\ and described in the SAB review
report issued in 2010. They are also consistent with the key
recommendations contained in that report.
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\6\ U.S. EPA. Risk and Technology Review (RTR) Risk Assessment
Methodologies: For Review by the EPA's Science Advisory Board with
Case Studies--MACT I Petroleum Refining Sources and Portland Cement
Manufacturing, June 2009. EPA-452/R-09-006. https://www3.epa.gov/airtoxics/rrisk/rtrpg.html.
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1. How did we estimate actual emissions and identify the emissions
release characteristics?
As discussed in section II.C of this preamble, we used data from
Part 1 of the 2018 survey as the basis for the risk assessment for the
MVP and CEP source categories. Part 1 of the survey, which concluded in
August/September 2018, targeted facilities that are major sources of
HAP emissions and involved an update of pre-populated National
Emissions Inventory (NEI) data spreadsheets (or creation of new
datasets). The NEI is a database that contains information about
sources that emit criteria air pollutants, their precursors, and HAP.
The NEI database includes estimates of actual annual air pollutant
emissions from point and volume sources; emission release
characteristic data such as emission release height, temperature,
diameter, velocity, and flow rate; and locational latitude/longitude
coordinates. We asked facilities subject to the Cellulose Products
Manufacturing NESHAP to refine (or create new) inventories based on
their NEI datasets for purposes of detailed residual risk modeling.
Refinements included providing additional details for HAP emission
sources, providing more specific information on the location and
characteristics of emission points (e.g., updating emission release
coordinates and parameters), and adding or updating HAP emissions data
for each emission release point. We compiled the updated datasets for
each individual facility into MVP and CEP emissions databases to create
the MACT source category residual risk modeling files.
The actual annual emissions data in the emissions databases include
data from source tests, CEMS, material balances, emission factors,
emission models, and engineering judgment provided by sources surveyed
in Part 1 of the survey. We received a comprehensive set of emissions
estimates that enabled us to conduct risk modeling of HAP emissions for
all major source facilities in the MVP and CEP source categories.
We conducted substantial quality assurance (QA) efforts on the Part
1 data in order to create the modeling files needed for the 40 CFR part
63, subpart UUUU, residual risk assessment.\7\ We first reviewed the
Part 1 databases to remove non-applicable data (e.g., data marked for
deletion by survey respondents) unless we considered them to be source-
category data, emission units identified as not subject to the
Cellulose Products Manufacturing NESHAP, emission units identified as
shut down, records with non-HAP data, and records with zero emissions.
No duplicate emissions data were discovered during the QA.
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\7\ These QA efforts are discussed in an April 15, 2019
memorandum in the docket titled Preparation of the Residual Risk
Modeling Input File for Subpart UUUU.
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We reviewed the databases to ensure that each record contained a
facility identifier (ID), emission unit ID, and process ID. If an ID
was missing, one was assigned using information provided by industry
(e.g., from EPA databases, from emission unit description or process
description in the NEI). In some cases, emission unit IDs and process
IDs were revised for consistency. Looking across the updated MVP and
CEP inventories, we also reviewed whether there may be any referential
integrity issues associated with these IDs (e.g., having the same
emission unit ID associated with multiple emission unit descriptions or
having the same process ID associated with multiple process
descriptions or multiple source classification codes (SCCs)). In those
cases, we revised the appropriate ID to address the issue.
In addition, each record was checked to ensure it was labeled with
a regulatory code, SCC, and emission process group. No regulatory codes
or SCCs were found missing. The SCCs for some records were revised for
consistency. Where information on emission process group was missing,
the emission process group was determined based on information from
SCCs, comments from survey respondents, etc. Next, the SCCs and
emission process groups were compared and reviewed for consistency with
each other; no issues were found.
We reviewed the pollutant codes in the source category risk
modeling files to ensure the codes and descriptions matched the latest
code lookup table used by the EPA for risk modeling files; the review
found the records to be consistent.
We speciated data for chromium and mercury using default speciation
criteria for those pollutants for the specific SCC. We speciated
chromium emissions as hexavalent chromium (chromium VI) and trivalent
chromium (chromium III). We speciated mercury emissions as particulate
divalent mercury, gaseous divalent mercury, and gaseous elemental
mercury. We were unable to speciate data for glycol ether for one
facility because no information on the glycol ether compound(s) emitted
was available from the facility in their Part 1 survey response or
operating permit. For unspeciated emission inventories, it is the EPA's
risk assessment policy to use the most potent noncancer health
benchmark as the default emission compound; in this case, ethylene
glycol methyl ether would be modeled.
We reviewed the emissions data by calculating the percent of
facilities reporting each HAP, comparing emissions of a facility to
category average emissions, calculating standard deviations, and
identifying outliers. No pollutants in the MVP and CEP modeling files
were found above or below the range for either category.
We reviewed the MVP and CEP risk modeling files to ensure that each
record in these files contained an emission release point ID. If an ID
was missing, one was assigned using information provided by industry
(e.g., from the emission unit ID or process ID). In some cases,
emission release point IDs were revised for consistency. Looking across
the updated MVP and CEP inventories, we also determined whether there
may be any referential integrity issues associated with the emission
release information. For each emission release point, each record
[[Page 47353]]
should have one set of coordinates (latitude and longitude) and one set
of stack or fugitive parameters. All records were reviewed for
consistency with respect to the emission release point. Where any such
issues were identified, we revised the emission release point ID,
stack/fugitive parameters, and/or coordinates to address the issue.
We reviewed emission points labeled as stacks to ensure no fugitive
parameters were identified; any fugitive parameter values (usually
zeroes) entered for these records were deleted. We reviewed stack
parameters to ensure all were populated with reasonable values and made
changes where necessary. We checked stack height data to ensure that
they were greater than stack diameter. We checked exit gas flow rate
data to determine whether they met the EPA's criteria that the flow
rate must be within 10 percent of the calculated value (assuming a
cylindrical stack). Where exit gas flow rate values did not meet the
10-percent criteria, we conducted a review to determine the source of
the discrepancy (e.g., the reported stack parameter was in the wrong
units). We also checked for missing stack parameters and populated the
missing data using values from other records for the same emission
release point; if values from other records were not available, we
calculated the missing value based on other related parameters for the
same emission release point (e.g., calculated exit gas velocity using
available data for stack diameter and exit gas flow rate).
We checked fugitive parameters to ensure there was an associated
length, width, and angle, and that no stack parameters for fugitive
sources were erroneously populated, other than the required national
defaults.
We checked coordinate values (latitude and longitude) to determine
if there were any missing values and to ensure only one set of
coordinates appeared for each emission release point. We populated the
missing data using values from other records for the same emission
release point, where possible. We revised coordinate values where
necessary to ensure coordinates were consistent for the same emission
point. We also checked coordinate values to ensure that all coordinates
were on the facility property, by analyzing the distance between
coordinates at individual facilities. Only one emission point, a
wastewater treatment system emission unit, was found to be an outlier,
and the coordinates of this emission point were checked and were found
to lie on wastewater tanks near the boundary of the property.
We checked the source category risk modeling files for missing
control measure information and filled gaps using control measure
comments provided by respondents in their Part 1 survey responses or
process diagrams provided by respondents in their Part 2 survey
responses.
The emissions inventory for MVP sources identifies no emissions of
PB-HAP. The emissions inventory for CEP sources identifies emissions of
the following PB-HAP: Cadmium compounds, arsenic compounds, lead
compounds, and mercury compounds. Risk-based screening levels are
available for Tier 1 screening for all of the above PB-HAP except lead
compounds, which are compared to the level of the current National
Ambient Air Quality Standard (NAAQS) for lead.
Consistent with the EPA's standard practice in conducting risk
assessments for source categories, we conducted a two-step process to
determine: (1) Whether PB-HAP are being emitted; and (2) whether they
are being released above screening levels. If these releases are
significantly above the screening levels and the EPA has detailed
information on the releases and the site, a complete multipathway
analysis of the site is conducted to estimate pathway risks for the
source category.
We considered actual emissions of the ecological HAP emitted from
the CEP source category in the ecological HAP analysis. In addition to
the PB-HAP emitted from the CEP source category, we considered
hydrochloric acid (HCl) and hydrogen fluoride (HF) for ecological HAP
modeling. The CEP source category, however, does not emit HF. Further
information about the multipathway analysis performed for this category
follows in section IV.A.2.c of this preamble.
2. How did we estimate MACT-allowable emissions?
The available emissions data in the RTR emissions dataset include
estimates of the mass of HAP emitted during a specified annual time
period. These ``actual'' emission levels are often lower than the
emission levels allowed under the requirements of the current MACT
standards. The emissions allowed under the MACT standards are referred
to as the ``MACT-allowable'' emissions. We discussed the consideration
of both MACT-allowable and actual emissions in the final Coke Oven
Batteries RTR (70 FR 19998-19999, April 15, 2005) and in the proposed
and final Hazardous Organic NESHAP RTR (71 FR 34428, June 14, 2006, and
71 FR 76609, December 21, 2006, respectively). In those actions, we
noted that assessing the risk at the MACT-allowable level is inherently
reasonable since that risk reflects the maximum level facilities could
emit and still comply with national emission standards. We also
explained that it is reasonable to consider actual emissions, where
such data are available, in both steps of the risk analysis, in
accordance with the Benzene NESHAP approach. (54 FR 38044, September
14, 1989.)
Actual emissions are sometimes less than allowable emissions due to
a compliance margin, a more stringent state or local rule, or over-
control due to the use of control technologies, equipment, or work
practices that are significantly better than that required to meet 40
CFR part 63, subpart UUUU, emission limits. Consequently, as part of
the Part 1 survey instructions, the EPA requested that facilities
provide MACT-allowable emissions estimates.
Allowable emissions estimates were available for four of the five
MVP facilities. Two MVP facilities provided their allowable emissions
in their Part 1 survey spreadsheet. Two other MVP facilities provided
their allowable emissions separately, in their Part 1 survey response
letter. The latter two facilities stated that the stack parameters
would be expected to be different if they were to emit at the allowable
emissions levels because additional ductwork and ductwork modifications
would be expected in order to route additional fumes to their
biofilters if they increased capacity. While we do not intend MACT-
allowable emissions in this risk modeling effort to represent the
maximum potential-to-emit emission rate, we conservatively used this
information for modeling because it was the only readily available
information. We created new records in the MVP risk modeling file to
include just these allowable emissions data and their associated stack
parameters. To avoid any referential integrity issues, we assigned a
different emission release point ID to these allowable emissions
records.
The remaining MVP facility did not provide allowable emissions data
in their survey spreadsheet. However, this facility is the only one in
its subcategory, so the original MACT for the subcategory was based on
their level of control. Consequently, we assumed that allowable
emissions were equal to the reported actual emissions. So, for this
facility, the allowable multiplier is 1.
There were some gaps in the allowable emissions estimates provided
by the MVP facilities. Allowable emissions for carbonyl sulfide (COS)
were not available for one MVP facility
[[Page 47354]]
for one of their processes because they report it as part of the
hydrogen sulfide (H2S) limit in their title V permit. We
created a new record in the MVP risk modeling file that calculated the
COS allowable emissions for this process using the same multiplier as
H2S (6.8). Allowable emissions for CS2 were also
not available for a second MVP facility for some of their processes. We
calculated the allowable emissions for this facility using the median
of the multipliers for those processes at the facility that had
allowable emissions estimates. Using this approach, we estimated the
median allowable multiplier for CS2 for this facility to be
approximately 2.4.
Allowable emissions estimates were available for 48 percent of the
records in the CEP risk modeling file, and the remaining 52 percent of
records had no allowable emissions estimates. Of that 52 percent of
records, 33 percent were uncontrolled sources of organic HAP, and 19
percent were controlled sources of organic HAP.
For uncontrolled CEP sources without allowable emissions data
(e.g., fugitive emissions), we assumed that allowable emissions were
equal to their reported actual emissions, since there is no additional
control beyond current emissions. For controlled CEP sources without
allowable emissions data, we reviewed Part 2 survey data on emission
controls for these sources and found that all of these sources were
already meeting the 99-percent control required under 40 CFR part 63,
subpart UUUU, and based on the data reported, there is little if any
additional control beyond current emissions. Consequently, allowable
emissions are equal to actuals for controlled CEP sources.
3. How do we conduct dispersion modeling, determine inhalation
exposures, and estimate individual and population inhalation risk?
Both long-term and short-term inhalation exposure concentrations
and health risk from the source category addressed in this proposal
were estimated using the Human Exposure Model (HEM-3).\8\ The HEM-3
performs three primary risk assessment activities: (1) Conducting
dispersion modeling to estimate the concentrations of HAP in ambient
air, (2) estimating long-term and short-term inhalation exposures to
individuals residing within 50 kilometers (km) of the modeled sources,
and (3) estimating individual and population-level inhalation risk
using the exposure estimates and quantitative dose-response
information.
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\8\ For more information about HEM-3, go to https://www.epa.gov/fera/risk-assessment-and-modeling-human-exposure-model-hem.
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a. Dispersion Modeling
The air dispersion model AERMOD, used by the HEM-3 model, is one of
the EPA's preferred models for assessing air pollutant concentrations
from industrial facilities.\9\ To perform the dispersion modeling and
to develop the preliminary risk estimates, HEM-3 draws on three data
libraries. The first is a library of meteorological data, which is used
for dispersion calculations. This library includes 1 year (2016) of
hourly surface and upper air observations from 824 meteorological
stations, selected to provide coverage of the United States and Puerto
Rico. A second library of United States Census Bureau census block \10\
internal point locations and populations provides the basis of human
exposure calculations (U.S. Census, 2010). In addition, for each census
block, the census library includes the elevation and controlling hill
height, which are also used in dispersion calculations. A third library
of pollutant-specific dose-response values is used to estimate health
risk. These are discussed below.
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\9\ U.S. EPA. Revision to the Guideline on Air Quality Models:
Adoption of a Preferred General Purpose (Flat and Complex Terrain)
Dispersion Model and Other Revisions (70 FR 68218, November 9,
2005).
\10\ A census block is the smallest geographic area for which
census statistics are tabulated.
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b. Risk From Chronic Exposure to HAP
In developing the risk assessment for chronic exposures, we use the
estimated annual average ambient air concentrations of each HAP emitted
by each source in the source category. The HAP air concentrations at
each nearby census block centroid located within 50 km of the facility
are a surrogate for the chronic inhalation exposure concentration for
all the people who reside in that census block. A distance of 50 km is
consistent with both the analysis supporting the 1989 Benzene NESHAP
(54 FR 38044, September 14, 1989) and the limitations of Gaussian
dispersion models, including AERMOD.
For each facility, we calculate the MIR as the cancer risk
associated with a continuous lifetime (24 hours per day, 7 days per
week, 52 weeks per year, 70 years) exposure to the maximum
concentration at the centroid of each inhabited census block. We
calculate individual cancer risk by multiplying the estimated lifetime
exposure to the ambient concentration of each HAP (in micrograms per
cubic meter ([mu]g/m\3\)) by its unit risk estimate (URE). The URE is
an upper-bound estimate of an individual's incremental risk of
contracting cancer over a lifetime of exposure to a concentration of 1
microgram of the pollutant per cubic meter of air. For residual risk
assessments, we generally use UREs from the EPA's Integrated Risk
Information System (IRIS). For carcinogenic pollutants without IRIS
values, we look to other reputable sources of cancer dose-response
values, often using California EPA (CalEPA) UREs, where available. In
cases where new, scientifically credible dose-response values have been
developed in a manner consistent with the EPA guidelines and have
undergone a peer review process similar to that used by the EPA, we may
use such dose-response values in place of, or in addition to, other
values, if appropriate. The pollutant-specific dose-response values
used to estimate health risk are available at https://www.epa.gov/fera/dose-response-assessment-assessing-health-risks-associated-exposure-hazardous-air-pollutants.
To estimate individual lifetime cancer risks associated with
exposure to HAP emissions from each facility in the source category, we
sum the risks for each of the carcinogenic HAP \11\ emitted by the
modeled facility. We estimate cancer risk at every census block within
50 km of every facility in the source category. The MIR is the highest
individual lifetime cancer risk estimated for any of those census
blocks. In addition to calculating the MIR, we estimate the
distribution of individual cancer risks for the source category by
summing the number of individuals within 50 km of the sources whose
estimated risk falls within a specified risk range. We also estimate
annual
[[Page 47355]]
cancer incidence by multiplying the estimated lifetime cancer risk at
each census block by the number of people residing in that block,
summing results for all of the census blocks, and then dividing this
result by a 70-year lifetime.
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\11\ The EPA's 2005 Guidelines for Carcinogen Risk Assessment
classifies carcinogens as: ``carcinogenic to humans,'' ``likely to
be carcinogenic to humans,'' and ``suggestive evidence of
carcinogenic potential.'' These classifications also coincide with
the terms ``known carcinogen, probable carcinogen, and possible
carcinogen,'' respectively, which are the terms advocated in the
EPA's Guidelines for Carcinogen Risk Assessment, published in 1986
(51 FR 33992, September 24, 1986). In August 2000, the document,
Supplemental Guidance for Conducting Health Risk Assessment of
Chemical Mixtures (EPA/630/R-00/002), was published as a supplement
to the 1986 document. Copies of both documents can be obtained from
https://cfpub.epa.gov/ncea/risk/recordisplay.cfm?deid=20533&CFID=70315376&CFTOKEN=71597944. Summing
the risk of these individual compounds to obtain the cumulative
cancer risk is an approach that was recommended by the EPA's SAB in
their 2002 peer review of the EPA's National Air Toxics Assessment
(NATA) titled NATA--Evaluating the National-scale Air Toxics
Assessment 1996 Data--an SAB Advisory, available at https://
yosemite.epa.gov/sab/sabproduct.nsf/
214C6E915BB04E14852570CA007A682C/$File/ecadv02001.pdf.
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To assess the risk of noncancer health effects from chronic
exposure to HAP, we calculate either an HQ or a target organ-specific
hazard index (TOSHI). We calculate an HQ when a single noncancer HAP is
emitted. Where more than one noncancer HAP is emitted, we sum the HQ
for each of the HAP that affects a common target organ or target organ
system to obtain a TOSHI. The HQ is the estimated exposure divided by
the chronic noncancer dose-response value, which is a value selected
from one of several sources. The preferred chronic noncancer dose-
response value is the EPA RfC, defined as ``an estimate (with
uncertainty spanning perhaps an order of magnitude) of a continuous
inhalation exposure to the human population (including sensitive
subgroups) that is likely to be without an appreciable risk of
deleterious effects during a lifetime'' (https://iaspub.epa.gov/sor_internet/registry/termreg/searchandretrieve/glossariesandkeywordlists/search.do?details=&vocabName=IRIS%20Glossary). In cases where an RfC
from the EPA's IRIS is not available or where the EPA determines that
using a value other than the RfC is appropriate, the chronic noncancer
dose-response value can be a value from the following prioritized
sources, which define their dose-response values similarly to the EPA:
(1) The Agency for Toxic Substances and Disease Registry (ATSDR)
Minimum Risk Level (https://www.atsdr.cdc.gov/mrls/index.asp); (2) the
CalEPA Chronic Reference Exposure Level (REL) (https://oehha.ca.gov/air/crnr/notice-adoption-air-toxics-hot-spots-program-guidance-manual-preparation-health-risk-0); or (3) as noted above, a scientifically
credible dose-response value that has been developed in a manner
consistent with the EPA guidelines and has undergone a peer review
process similar to that used by the EPA. The pollutant-specific dose-
response values used to estimate health risks are available at https://www.epa.gov/fera/dose-response-assessment-assessing-health-risks-associated-exposure-hazardous-air-pollutants.
c. Risk From Acute Exposure to HAP That May Cause Health Effects Other
Than Cancer
For each HAP for which appropriate acute inhalation dose-response
values are available, the EPA also assesses the potential health risks
due to acute exposure. For these assessments, the EPA makes
conservative assumptions about emission rates, meteorology, and
exposure location. In this proposed rulemaking, as part of our efforts
to continually improve our methodologies to evaluate the risks that HAP
emitted from categories of industrial sources pose to human health and
the environment,\12\ we are revising our treatment of meteorological
data to use reasonable worst-case air dispersion conditions in our
acute risk screening assessments instead of worst-case air dispersion
conditions. This revised treatment of meteorological data and the
supporting rationale are described in more detail in the Residual Risk
Assessment for the Miscellaneous Viscose Processes Source Category in
Support of the 2019 Risk and Technology Review Proposed Rule and in the
Residual Risk Assessment for the Cellulose Ethers Production Source
Category in Support of the 2019 Risk and Technology Review Proposed
Rule and in Appendix 5 of both reports: Technical Support Document for
Acute Risk Screening Assessment. We will be applying this revision in
RTR rulemakings proposed on or after June 3, 2019.
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\12\ See, e.g., U.S. EPA. Screening Methodologies to Support
Risk and Technology Reviews (RTR): A Case Study Analysis (Draft
Report, May 2017. https://www3.epa.gov/ttn/atw/rrisk/rtrpg.html).
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To assess the potential acute risk to the maximally exposed
individual, we use the peak hourly emission rate for each emission
point,\13\ reasonable worst-case air dispersion conditions (i.e., 99th
percentile), and the point of highest off-site exposure. Specifically,
we assume that peak emissions from the source category and reasonable
worst-case air dispersion conditions co-occur and that a person is
present at the point of maximum exposure.
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\13\ In the absence of hourly emission data, we develop
estimates of maximum hourly emission rates by multiplying the
average actual annual emissions rates by a factor (either a
category-specific factor or a default factor of 10) to account for
variability. This is documented in Residual Risk Assessment for the
Miscellaneous Viscose Processes Source Category in Support of the
2019 Risk and Technology Review Proposed Rule, Residual Risk
Assessment for the Cellulose Ethers Production Source Category in
Support of the 2019 Risk and Technology Review Proposed Rule, and in
Appendix 5 of the reports: Technical Support Document for Acute Risk
Screening Assessment, both are available in the docket for this
rulemaking.
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To characterize the potential health risks associated with
estimated acute inhalation exposures to a HAP, we generally use
multiple acute dose-response values, including acute RELs, acute
exposure guideline levels (AEGLs), and emergency response planning
guidelines (ERPG) for 1-hour exposure durations), if available, to
calculate acute HQs. The acute HQ is calculated by dividing the
estimated acute exposure concentration by the acute dose-response
value. For each HAP for which acute dose-response values are available,
the EPA calculates acute HQs.
An acute REL is defined as ``the concentration level at or below
which no adverse health effects are anticipated for a specified
exposure duration.'' \14\ Acute RELs are based on the most sensitive,
relevant, adverse health effect reported in the peer-reviewed medical
and toxicological literature. They are designed to protect the most
sensitive individuals in the population through the inclusion of
margins of safety. Because margins of safety are incorporated to
address data gaps and uncertainties, exceeding the REL does not
automatically indicate an adverse health impact. AEGLs repr esent
threshold exposure limits for the general public and are applicable to
emergency exposures ranging from 10 minutes to 8 hours.\15\ They are
guideline levels for ``once-in-a-lifetime, short-term exposures to
airborne concentrations of acutely toxic, high-priority chemicals.''
Id. at 21. The AEGL-1 is specifically defined as ``the airborne
concentration (expressed as ppm (parts per million) or mg/m\3\
(milligrams per cubic meter)) of a substance above which it is
predicted that the general population, including susceptible
individuals, could experience notable discomfort, irritation, or
certain asymptomatic nonsensory effects. However, the effects are not
disabling and are transient and reversible upon cessation of
exposure.'' The document also notes that ``Airborne concentrations
below AEGL-1 represent exposure levels that can produce mild and
progressively increasing but transient and nondisabling odor, taste,
and sensory irritation or certain
[[Page 47356]]
asymptomatic, nonsensory effects.'' Id. AEGL-2 are defined as ``the
airborne concentration (expressed as parts per million or milligrams
per cubic meter) of a substance above which it is predicted that the
general population, including susceptible individuals, could experience
irreversible or other serious, long-lasting adverse health effects or
an impaired ability to escape.'' Id.
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\14\ CalEPA issues acute RELs as part of its Air Toxics Hot
Spots Program, and the 1-hour and 8-hour values are documented in
Air Toxics Hot Spots Program Risk Assessment Guidelines, Part I, The
Determination of Acute Reference Exposure Levels for Airborne
Toxicants, which is available at https://oehha.ca.gov/air/general-info/oehha-acute-8-hour-and-chronic-reference-exposure-level-rel-summary.
\15\ National Academy of Sciences, 2001. Standing Operating
Procedures for Developing Acute Exposure Levels for Hazardous
Chemicals, page 2. Available at https://www.epa.gov/sites/production/files/2015-09/documents/sop_final_standing_operating_procedures_2001.pdf. Note that the
National Advisory Committee for Acute Exposure Guideline Levels for
Hazardous Substances ended in October 2011, but the AEGL program
continues to operate at the EPA and works with the National
Academies to publish final AEGLs (https://www.epa.gov/aegl).
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ERPGs are ``developed for emergency planning and are intended as
health-based guideline concentrations for single exposures to
chemicals.'' \16\ Id. at 1. The ERPG-1 is defined as ``the maximum
airborne concentration below which it is believed that nearly all
individuals could be exposed for up to 1 hour without experiencing
other than mild transient adverse health effects or without perceiving
a clearly defined, objectionable odor.'' Id. at 2. Similarly, the ERPG-
2 is defined as ``the maximum airborne concentration below which it is
believed that nearly all individuals could be exposed for up to one
hour without experiencing or developing irreversible or other serious
health effects or symptoms which could impair an individual's ability
to take protective action.'' Id. at 1.
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\16\ ERPGS Procedures and Responsibilities. March 2014. American
Industrial Hygiene Association. Available at: https://www.aiha.org/get-involved/AIHAGuidelineFoundation/EmergencyResponsePlanningGuidelines/Documents/ERPG%20Committee%20Standard%20Operating%20Procedures%20%20-%20March%202014%20Revision%20%28Updated%2010-2-2014%29.pdf.
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An acute REL for 1-hour exposure durations is typically lower than
its corresponding AEGL-1 and ERPG-1. Even though their definitions are
slightly different, AEGL-1s are often the same as the corresponding
ERPG-1s, and AEGL-2s are often equal to ERPG-2s. The maximum HQs from
our acute inhalation screening risk assessment typically result when we
use the acute REL for a HAP. In cases where the maximum acute HQ
exceeds 1, we also report the HQ based on the next highest acute dose-
response value (usually the AEGL-1 and/or the ERPG-1).
As part of the Part 1 survey instructions, the EPA requested that
facilities provide acute emissions estimates. For the MVP source
category, acute emissions estimates were available for four of the five
facilities. One of the four facilities was missing an acute emission
estimate for COS for one process, but we were able to calculate an
estimate for COS by applying the same acute multiplier for
CS2 for the same process at this facility. We developed
separate acute multipliers for MVP process operations and MVP storage
tanks to estimate acute emissions for the fifth facility. We estimated
the average acute multipliers for MVP process operations and MVP
storage tanks to be approximately 1.9 and 1.1, respectively.
For the CEP source category, acute emissions estimates were
available for 38 percent of the records in the CEP risk modeling file.
The remaining 62 percent of records had no acute emissions estimates.
For CEP sources without acute emissions data, we reviewed permits and
extracted maximum hourly rate data if available, and assumed the acute
multiplier would be 10 if no data were available.
A further discussion of why these factors were chosen can be found
in the memorandum, Preparation of the Residual Risk Modeling Input File
for Subpart UUUU, available in the docket for this rulemaking.
In our acute inhalation screening risk assessment, acute impacts
are deemed negligible for HAP for which acute HQs are less than or
equal to 1, and no further analysis is performed for these HAP. This
was the case for the CEP source category. In cases where an acute HQ
from the screening step is greater than 1, we assess the site-specific
data to ensure that the acute HQ is at an off-site location. This was
required for the MVP source category, in which the data refinements
employed consisted of ensuring that the locations where the maximum HQ
occurred were off facility property and where the public could
potentially be exposed. These refinements are discussed more fully in
the Residual Risk Assessment for the Miscellaneous Viscose Processes
Source Category in Support of the 2019 Risk and Technology Review
Proposed Rule which is available in the docket for this source
category.
4. How do we conduct the multipathway exposure and risk screening
assessment?
The EPA conducts a tiered screening assessment examining the
potential for significant human health risks due to exposures via
routes other than inhalation (i.e., ingestion). We first determine
whether any sources in the source categories emit any HAP known to be
persistent and bioaccumulative in the environment, as identified in the
EPA's Air Toxics Risk Assessment Library (see Volume 1, Appendix D, at
https://www.epa.gov/fera/risk-assessment-and-modeling-air-toxics-risk-assessment-reference-library).
For the MVP source category, we did not identify emissions of any
PB-HAP or lead compounds. Because we did not identify PB-HAP emissions,
no further evaluation of multipathway risk was conducted for this
source category.
For the CEP source category, we identified PB-HAP emissions of
cadmium compounds, arsenic compounds, lead compounds, and mercury
compounds, so we proceeded to the next step of the evaluation. Except
for lead, the human health risk screening assessment for PB-HAP
consists of three progressive tiers. In a Tier 1 screening assessment,
we determine whether the magnitude of the facility-specific emissions
of PB-HAP warrants further evaluation to characterize human health risk
through ingestion exposure. To facilitate this step, we evaluate
emissions against previously developed screening threshold emission
rates for several PB-HAP that are based on a hypothetical upper-end
screening exposure scenario developed for use in conjunction with the
EPA's Total Risk Integrated Methodology.Fate, Transport, and Ecological
Exposure (TRIM.FaTE) model. The PB-HAP with screening threshold
emission rates are arsenic compounds, cadmium compounds, chlorinated
dibenzodioxins and furans, mercury compounds, and polycyclic organic
matter (POM). Based on the EPA estimates of toxicity and
bioaccumulation potential, these pollutants represent a conservative
list for inclusion in multipathway risk assessments for RTR rules. (See
Volume 1, Appendix D at https://www.epa.gov/sites/production/files/2013-08/documents/volume_1_reflibrary.pdf.) In this assessment, we
compare the facility-specific emission rates of these PB-HAP to the
screening threshold emission rates for each PB-HAP to assess the
potential for significant human health risks via the ingestion pathway.
We call this application of the TRIM.FaTE model the Tier 1 screening
assessment. The ratio of a facility's actual emission rate to the Tier
1 screening threshold emission rate is a ``screening value.''
We derive the Tier 1 screening threshold emission rates for these
PB-HAP (other than lead compounds) to correspond to a maximum excess
lifetime cancer risk of 1-in-1 million (i.e., for arsenic compounds,
polychlorinated dibenzodioxins and furans and POM) or, for HAP that
cause noncancer health effects (i.e., cadmium compounds and mercury
compounds), a maximum HQ of 1. If the emission rate of any one PB-HAP
or combination of carcinogenic PB-HAP in the Tier 1 screening
assessment exceeds the Tier 1 screening threshold emission rate for any
facility (i.e., the screening value is greater than 1), we conduct a
second
[[Page 47357]]
screening assessment, which we call the Tier 2 screening assessment.
The Tier 2 screening assessment separates the Tier 1 combined fisher
and farmer exposure scenario into fisher, farmer, and gardener
scenarios that retain upper-bound ingestion rates.
In the Tier 2 screening assessment, the location of each facility
that exceeds a Tier 1 screening threshold emission rate is used to
refine the assumptions associated with the Tier 1 fisher and farmer
exposure scenarios at that facility. A key assumption in the Tier 1
screening assessment is that a lake and/or farm is located near the
facility. As part of the Tier 2 screening assessment, we use a U.S.
Geological Survey (USGS) database to identify actual waterbodies within
50 km of each facility and assume the fisher only consumes fish from
lakes within that 50 km zone. We also examine the differences between
local meteorology near the facility and the meteorology used in the
Tier 1 screening assessment. We then adjust the previously-developed
Tier 1 screening threshold emission rates for each PB-HAP for each
facility based on an understanding of how exposure concentrations
estimated for the screening scenario change with the use of local
meteorology and USGS lakes database.
In the Tier 2 farmer scenario, we maintain an assumption that the
farm is located within 0.5 km of the facility and that the farmer
consumes meat, eggs, dairy, vegetables, and fruit produced near the
facility. We may further refine the Tier 2 screening analysis by
assessing a gardener scenario to characterize a range of exposures,
with the gardener scenario being more plausible in RTR evaluations.
Under the gardener scenario, we assume the gardener consumes home-
produced eggs, vegetables, and fruit products at the same ingestion
rate as the farmer. The Tier 2 screen continues to rely on the high-end
food intake assumptions that were applied in Tier 1 for local fish
(adult female angler at 99th percentile fish consumption of fish \17\)
and locally grown or raised foods (90th percentile consumption of
locally grown or raised foods for the farmer and gardener scenarios
\18\). If PB-HAP emission rates do not result in a Tier 2 screening
value greater than 1, we consider those PB-HAP emissions to pose risks
below a level of concern. If the PB-HAP emission rates for a facility
exceed the Tier 2 screening threshold emission rates, we may conduct a
Tier 3 screening assessment.
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\17\ Burger, J. 2002. Daily consumption of wild fish and game:
Exposures of high end recreationists. International Journal of
Environmental Health Research 12:343-354.
\18\ U.S. EPA. Exposure Factors Handbook 2011 Edition (Final).
U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-09/
052F, 2011.
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There are several analyses that can be included in a Tier 3
screening assessment, depending upon the extent of refinement
warranted, including validating that the lakes are fishable, locating
residential/garden locations for urban and/or rural settings,
considering plume-rise to estimate emissions lost above the mixing
layer, and considering hourly effects of meteorology and plume rise on
chemical fate and transport (a time-series analysis). If necessary, the
EPA may further refine the screening assessment through a site-specific
assessment.
In evaluating the potential multipathway risk from emissions of
lead compounds, rather than developing a screening threshold emission
rate, we compare maximum estimated chronic inhalation exposure
concentrations to the level of the current National Ambient Air Quality
Standard (NAAQS) for lead.\19\ Values below the level of the primary
(health-based) lead NAAQS are considered to have a low potential for
multipathway risk.
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\19\ In doing so, the EPA notes that the legal standard for a
primary NAAQS--that a standard is requisite to protect public health
and provide an adequate margin of safety (CAA section 109(b))--
differs from the CAA section 112(f) standard (requiring, among other
things, that the standard provide an ``ample margin of safety to
protect public health''). However, the primary lead NAAQS is a
reasonable measure of determining risk acceptability (i.e., the
first step of the Benzene NESHAP analysis) since it is designed to
protect the most susceptible group in the human population--
children, including children living near major lead emitting
sources. 73 FR 67002/3; 73 FR 67000/3; 73 FR 67005/1. In addition,
applying the level of the primary lead NAAQS at the risk
acceptability step is conservative, since that primary lead NAAQS
reflects an adequate margin of safety.
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For further information on the multipathway assessment for CEP, see
the Residual Risk Assessment for the Cellulose Ethers Production Source
Category in Support of the Risk and Technology Review 2019 Proposed
Rule, which is available in the docket for this action.
5. How do we conduct the environmental risk screening assessment?
a. Adverse Environmental Effect, Environmental HAP, and Ecological
Benchmarks
The EPA conducts a screening assessment to examine the potential
for an adverse environmental effect as required under section
112(f)(2)(A) of the CAA. Section 112(a)(7) of the CAA defines ``adverse
environmental effect'' as ``any significant and widespread adverse
effect, which may reasonably be anticipated, to wildlife, aquatic life,
or other natural resources, including adverse impacts on populations of
endangered or threatened species or significant degradation of
environmental quality over broad areas.''
The EPA focuses on eight HAP, which are referred to as
``environmental HAP,'' in its screening assessment: Six PB-HAP and two
acid gases. The PB-HAP included in the screening assessment are arsenic
compounds, cadmium compounds, dioxins/furans, POM, mercury (both
inorganic mercury and methyl mercury), and lead compounds. The acid
gases included in the screening assessment are HCl and HF.
HAP that persist and bioaccumulate are of particular environmental
concern because they accumulate in the soil, sediment, and water. The
acid gases, HCl and HF, are included due to their well-documented
potential to cause direct damage to terrestrial plants. In the
environmental risk screening assessment, we evaluate the following four
exposure media: Terrestrial soils, surface water bodies (includes
water-column and benthic sediments), fish consumed by wildlife, and
air. Within these four exposure media, we evaluate nine ecological
assessment endpoints, which are defined by the ecological entity and
its attributes. For PB-HAP (other than lead), both community-level and
population-level endpoints are included. For acid gases, the ecological
assessment evaluated is terrestrial plant communities.
An ecological benchmark represents a concentration of HAP that has
been linked to a particular environmental effect level. For each
environmental HAP, we identified the available ecological benchmarks
for each assessment endpoint. We identified, where possible, ecological
benchmarks at the following effect levels: Probable effect levels,
lowest-observed-adverse-effect level, and no-observed-adverse-effect
level. In cases where multiple effect levels were available for a
particular PB-HAP and assessment endpoint, we use all of the available
effect levels to help us to determine whether ecological risks exist
and, if so, whether the risks could be considered significant and
widespread.
For further information on how the environmental risk screening
assessment was conducted, including a discussion of the risk metrics
used, how the environmental HAP were identified, and how the ecological
benchmarks were selected, see Appendix 9 of the Residual Risk
Assessment for the
[[Page 47358]]
Cellulose Ethers Production Source Category in Support of the Risk and
Technology Review 2019 Proposed Rule, which is available in the docket
for this action.
b. Environmental Risk Screening Methodology
For the environmental risk screening assessment, the EPA first
determined whether any facilities in the MVP and CEP source categories
emitted any of the environmental HAP. For the CEP source category, we
identified emissions of cadmium compounds, arsenic compounds, lead
compounds, mercury compounds, and HCl. Because one or more of the
environmental HAP evaluated are emitted by at least one facility in the
source category, we proceeded to the second step of the evaluation. For
the MVP source category, we did not identify emissions of any of the
eight environmental HAP included in the screen. Because we did not
identify environmental HAP emissions from the MVP source category, no
further evaluation of environmental risk was conducted for that
category.
c. PB-HAP Methodology
The environmental screening assessment includes six PB-HAP, arsenic
compounds, cadmium compounds, dioxins/furans, POM, mercury (both
inorganic mercury and methyl mercury), and lead compounds. With the
exception of lead, the environmental risk screening assessment for PB-
HAP consists of three tiers. The first tier of the environmental risk
screening assessment uses the same health-protective conceptual model
that is used for the Tier 1 human health screening assessment.
TRIM.FaTE model simulations were used to back-calculate Tier 1
screening threshold emission rates. The screening threshold emission
rates represent the emission rate in tons of pollutant per year that
results in media concentrations at the facility that equal the relevant
ecological benchmark. To assess emissions from each facility in the
category, the reported emission rate for each PB-HAP was compared to
the Tier 1 screening threshold emission rate for that PB-HAP for each
assessment endpoint and effect level. If emissions from a facility do
not exceed the Tier 1 screening threshold emission rate, the facility
``passes'' the screening assessment, and, therefore, is not evaluated
further under the screening approach. If emissions from a facility
exceed the Tier 1 screening threshold emission rate, we evaluate the
facility further in Tier 2.
In Tier 2 of the environmental screening assessment, the screening
threshold emission rates are adjusted to account for local meteorology
and the actual location of lakes in the vicinity of facilities that did
not pass the Tier 1 screening assessment. For soils, we evaluate the
average soil concentration for all soil parcels within a 7.5-km radius
for each facility and PB-HAP. For the water, sediment, and fish tissue
concentrations, the highest value for each facility for each pollutant
is used. If emission concentrations from a facility do not exceed the
Tier 2 screening threshold emission rate, the facility ``passes'' the
screening assessment and typically is not evaluated further. If
emissions from a facility exceed the Tier 2 screening threshold
emission rate, we evaluate the facility further in Tier 3.
As in the multipathway human health risk assessment, in Tier 3 of
the environmental screening assessment, we examine the suitability of
the lakes around the facilities to support life and remove those that
are not suitable (e.g., lakes that have been filled in or are
industrial ponds), adjust emissions for plume-rise, and conduct hour-
by-hour time-series assessments. If these Tier 3 adjustments to the
screening threshold emission rates still indicate the potential for an
adverse environmental effect (i.e., facility emission rate exceeds the
screening threshold emission rate), we may elect to conduct a more
refined assessment using more site-specific information. If, after
additional refinement, the facility emission rate still exceeds the
screening threshold emission rate, the facility may have the potential
to cause an adverse environmental effect.
To evaluate the potential for an adverse environmental effect from
lead, we compared the average modeled air concentrations (from HEM-3)
of lead around each facility in the source category to the level of the
secondary NAAQS for lead. The secondary lead NAAQS is a reasonable
means of evaluating environmental risk because it is set to provide
substantial protection against adverse welfare effects which can
include ``effects on soils, water, crops, vegetation, man-made
materials, animals, wildlife, weather, visibility and climate, damage
to and deterioration of property, and hazards to transportation, as
well as effects on economic values and on personal comfort and well-
being.''
d. Acid Gas Environmental Risk Methodology
The environmental screening assessment for acid gases evaluates the
potential phytotoxicity and reduced productivity of plants due to
chronic exposure to HF and HCl. The environmental risk screening
methodology for acid gases is a single-tier screening assessment that
compares modeled ambient air concentrations (from AERMOD) to the
ecological benchmarks for each acid gas. To identify a potential
adverse environmental effect (as defined in section 112(a)(7) of the
CAA) from emissions of HF and HCl, we evaluate the following metrics:
The size of the modeled area around each facility that exceeds the
ecological benchmark for each acid gas, in acres and square kilometers
(km\2\); the percentage of the modeled area around each facility that
exceeds the ecological benchmark for each acid gas; and the area-
weighted average screening value around each facility (calculated by
dividing the area-weighted average concentration over the 50-km
modeling domain by the ecological benchmark for each acid gas). For
further information on the environmental screening assessment approach,
see Appendix 9 of the Residual Risk Assessment for the Cellulose Ethers
Production Source Category in Support of the Risk and Technology Review
2019 Proposed Rule, which is available in the docket for this action.
6. How do we conduct facility-wide assessments?
To put the source category risks in context, we typically examine
the risks from the entire ``facility,'' where the facility includes all
HAP-emitting operations within a contiguous area and under common
control. In other words, we examine the HAP emissions not only from the
source category emission points of interest, but also emissions of HAP
from all other emission sources at the facility for which we have data.
For this source category, we conducted the facility-wide assessment
using a dataset compiled from the 2014 NEI. The source category records
of that NEI dataset were removed, evaluated, and updated as described
in section II.C of this preamble: What data collection activities were
conducted to support this action? Once a quality assured source
category dataset was available, it was placed back with the remaining
records from the NEI for that facility. The facility-wide file was then
used to analyze risks due to the inhalation of HAP that are emitted
``facility-wide'' for the populations residing within 50 km of each
facility, consistent with the methods used for the source category
analysis described above. For these facility-wide risk analyses, the
modeled
[[Page 47359]]
source category risks were compared to the facility-wide risks to
determine the portion of the facility-wide risks that could be
attributed to the source category addressed in this proposal. We also
specifically examined the facility that was associated with the highest
estimate of risk and determined the percentage of that risk
attributable to the source category of interest. The Residual Risk
Assessment for the Miscellaneous Viscose Processes Source Category in
Support of the Risk and Technology Review 2019 Proposed Rule and the
Residual Risk Assessment for the Cellulose Ethers Production Source
Category in Support of the Risk and Technology Review 2019 Proposed
Rule, available through the docket for this action, provides the
methodology and results of the facility-wide analyses, including all
facility-wide risks and the percentage of source category contribution
to facility-wide risks.
7. How do we consider uncertainties in risk assessment?
Uncertainty and the potential for bias are inherent in all risk
assessments, including those performed for this proposal. Although
uncertainty exists, we believe that our approach, which used
conservative tools and assumptions, ensures that our decisions are
health and environmentally protective. A brief discussion of the
uncertainties in the RTR emissions datasets, dispersion modeling,
inhalation exposure estimates, and dose-response relationships follows
below. Also included are those uncertainties specific to our acute
screening assessments, multipathway screening assessments, and our
environmental risk screening assessments. A more thorough discussion of
these uncertainties is included in the Residual Risk Assessment for the
Miscellaneous Viscose Processes Source Category in Support of the Risk
and Technology Review 2019 Proposed Rule and the Residual Risk
Assessment for the Cellulose Ethers Production Source Category in
Support of the Risk and Technology Review 2019 Proposed Rule, which are
available in the docket for this action. If a multipathway site-
specific assessment was performed for this source category, a full
discussion of the uncertainties associated with that assessment can be
found in Appendix 11 of that document, Site-Specific Human Health
Multipathway Residual Risk Assessment Report.
a. Uncertainties in the RTR Emissions Datasets
Although the development of the RTR emissions datasets involved
quality assurance/quality control processes, the accuracy of emissions
values will vary depending on the source of the data, the degree to
which data are incomplete or missing, the degree to which assumptions
made to complete the datasets are accurate, errors in emission
estimates, and other factors. Some of the emission estimates considered
in this analysis are annual totals for certain years, and they do not
reflect short-term fluctuations during the course of a year or
variations from year to year. The estimates of peak hourly emission
rates for the acute effects screening assessment were based on an
emission adjustment factor applied to the average annual hourly
emission rates, which are intended to account for emission fluctuations
due to normal facility operations.
b. Uncertainties in Dispersion Modeling
We recognize there is uncertainty in ambient concentration
estimates associated with any model, including the EPA's recommended
regulatory dispersion model, AERMOD. In using a model to estimate
ambient pollutant concentrations, the user chooses certain options to
apply. For RTR assessments, we select some model options that have the
potential to overestimate ambient air concentrations (e.g., not
including plume depletion or pollutant transformation). We select other
model options that have the potential to underestimate ambient impacts
(e.g., not including building downwash). Other options that we select
have the potential to either under- or overestimate ambient levels
(e.g., meteorology and receptor locations). On balance, considering the
directional nature of the uncertainties commonly present in ambient
concentrations estimated by dispersion models, the approach we apply in
the RTR assessments should yield unbiased estimates of ambient HAP
concentrations. We also note that the selection of meteorology dataset
location could have an impact on the risk estimates. As we continue to
update and expand our library of meteorological station data used in
our risk assessments, we expect to reduce this variability.
c. Uncertainties in Inhalation Exposure Assessment
Although every effort is made to identify all of the relevant
facilities and emission points, as well as to develop accurate
estimates of the annual emission rates for all relevant HAP, the
uncertainties in our emission inventory likely dominate the
uncertainties in the exposure assessment. Some uncertainties in our
exposure assessment include human mobility, using the centroid of each
census block, assuming lifetime exposure, and assuming only outdoor
exposures. For most of these factors, there is neither an under nor
overestimate when looking at the maximum individual risk or the
incidence, but the shape of the distribution of risks may be affected.
With respect to outdoor exposures, actual exposures may not be as high
if people spend time indoors, especially for very reactive pollutants
or larger particles. For all factors, we reduce uncertainty when
possible. For example, with respect to census-block centroids, we
analyze large blocks using aerial imagery and adjust locations of the
block centroids to better represent the population in the blocks. We
also add additional receptor locations where the population of a block
is not well represented by a single location.
d. Uncertainties in Dose-Response Relationships
There are uncertainties inherent in the development of the dose-
response values used in our risk assessments for cancer effects from
chronic exposures and noncancer effects from both chronic and acute
exposures. Some uncertainties are generally expressed quantitatively,
and others are generally expressed in qualitative terms. We note, as a
preface to this discussion, a point on dose-response uncertainty that
is stated in the EPA's 2005 Guidelines for Carcinogen Risk Assessment;
namely, that ``the primary goal of EPA actions is protection of human
health; accordingly, as an Agency policy, risk assessment procedures,
including default options that are used in the absence of scientific
data to the contrary, should be health protective'' (EPA's 2005
Guidelines for Carcinogen Risk Assessment, page 1-7). This is the
approach followed here as summarized in the next paragraphs.
Cancer UREs used in our risk assessments are those that have been
developed to generally provide an upper bound estimate of risk.\20\
That is, they represent a ``plausible upper limit to the true value of
a quantity'' (although this is usually not a true statistical
confidence limit). In some circumstances, the true risk could be as
[[Page 47360]]
low as zero; however, in other circumstances the risk could be
greater.\21\ Chronic noncancer RfC and reference dose (RfD) values
represent chronic exposure levels that are intended to be health-
protective levels. To derive dose-response values that are intended to
be ``without appreciable risk,'' the methodology relies upon an
uncertainty factor (UF) approach,\22\ which considers uncertainty,
variability, and gaps in the available data. The UFs are applied to
derive dose-response values that are intended to protect against
appreciable risk of deleterious effects.
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\20\ IRIS glossary (https://ofmpub.epa.gov/sor_internet/registry/termreg/searchandretrieve/glossariesandkeywordlists/search.do?details=&glossaryName=IRIS%20Glossary).
\21\ An exception to this is the URE for benzene, which is
considered to cover a range of values, each end of which is
considered to be equally plausible, and which is based on maximum
likelihood estimates.
\22\ See A Review of the Reference Dose and Reference
Concentration Processes, U.S. EPA, December 2002, and Methods for
Derivation of Inhalation Reference Concentrations and Application of
Inhalation Dosimetry, U.S. EPA, 1994.
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Many of the UFs used to account for variability and uncertainty in
the development of acute dose-response values are quite similar to
those developed for chronic durations. Additional adjustments are often
applied to account for uncertainty in extrapolation from observations
at one exposure duration (e.g., 4 hours) to derive an acute dose-
response value at another exposure duration (e.g., 1 hour). Not all
acute dose-response values are developed for the same purpose, and care
must be taken when interpreting the results of an acute assessment of
human health effects relative to the dose-response value or values
being exceeded. Where relevant to the estimated exposures, the lack of
acute dose-response values at different levels of severity should be
factored into the risk characterization as potential uncertainties.
Uncertainty also exists in the selection of ecological benchmarks
for the environmental risk screening assessment. We established a
hierarchy of preferred benchmark sources to allow selection of
benchmarks for each environmental HAP at each ecological assessment
endpoint. We searched for benchmarks for three effect levels (i.e., no-
effects level, threshold-effect level, and probable effect level), but
not all combinations of ecological assessment/environmental HAP had
benchmarks for all three effect levels. Where multiple effect levels
were available for a particular HAP and assessment endpoint, we used
all of the available effect levels to help us determine whether risk
exists and whether the risk could be considered significant and
widespread.
Although we make every effort to identify appropriate human health
effect dose-response values for all pollutants emitted by the sources
in this risk assessment, some HAP emitted by the CEP source category
are lacking dose-response assessments. Accordingly, these pollutants
cannot be included in the quantitative risk assessment, which could
result in quantitative estimates understating HAP risk. To help to
alleviate this potential underestimate, where we conclude similarity
with a HAP for which a dose-response value is available, we use that
value as a surrogate for the assessment of the HAP for which no value
is available. To the extent use of surrogates indicates appreciable
risk, we may identify a need to increase priority for an IRIS
assessment for that substance. We additionally note that, generally
speaking, HAP of greatest concern due to environmental exposures and
hazard are those for which dose-response assessments have been
performed, reducing the likelihood of understating risk. Further, HAP
not included in the quantitative assessment are assessed qualitatively
and considered in the risk characterization that informs the risk
management decisions, including consideration of HAP reductions
achieved by various control options. For the MVP source category, we
have identified appropriate human health effect dose-response values
for all pollutants.
For a group of compounds that are unspeciated (e.g., glycol
ethers), we conservatively use the most protective dose-response value
of an individual compound in that group to estimate risk. Similarly,
for an individual compound in a group (e.g., ethylene glycol diethyl
ether) that does not have a specified dose-response value, we also
apply the most protective dose-response value from the other compounds
in the group to estimate risk.
e. Uncertainties in Acute Inhalation Screening Assessments
In addition to the uncertainties highlighted above, there are
several factors specific to the acute exposure assessment that the EPA
conducts as part of the risk review under section 112 of the CAA. The
accuracy of an acute inhalation exposure assessment depends on the
simultaneous occurrence of independent factors that may vary greatly,
such as hourly emissions rates, meteorology, and the presence of a
person. In the acute screening assessment that we conduct under the RTR
program, we assume that peak emissions from the source category and
reasonable worst-case air dispersion conditions (i.e., 99th percentile)
co-occur. We then include the additional assumption that a person is
located at this point at the same time. Together, these assumptions
represent a reasonable worst-case exposure scenario. In most cases, it
is unlikely that a person would be located at the point of maximum
exposure during the time when peak emissions and reasonable worst-case
air dispersion conditions occur simultaneously.
f. Uncertainties in the Multipathway and Environmental Risk Screening
Assessments
For each source category, we generally rely on site-specific levels
of PB-HAP or environmental HAP emissions to determine whether a refined
assessment of the impacts from multipathway exposures is necessary or
whether it is necessary to perform an environmental screening
assessment. This determination is based on the results of a three-
tiered screening assessment that relies on the outputs from models--
TRIM.FaTE and AERMOD--that estimate environmental pollutant
concentrations and human exposures for five PB-HAP (dioxins, POM,
mercury, cadmium, and arsenic) and two acid gases (HF and HCl). For
lead, we use AERMOD to determine ambient air concentrations, which are
then compared to the secondary NAAQS standard for lead. Two important
types of uncertainty associated with the use of these models in RTR
risk assessments and inherent to any assessment that relies on
environmental modeling are model uncertainty and input uncertainty.\23\
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\23\ In the context of this discussion, the term ``uncertainty''
as it pertains to exposure and risk encompasses both variability in
the range of expected inputs and screening results due to existing
spatial, temporal, and other factors, as well as uncertainty in
being able to accurately estimate the true result.
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Model uncertainty concerns whether the model adequately represents
the actual processes (e.g., movement and accumulation) that might occur
in the environment. For example, does the model adequately describe the
movement of a pollutant through the soil? This type of uncertainty is
difficult to quantify. However, based on feedback received from
previous EPA SAB reviews and other reviews, we are confident that the
models used in the screening assessments are appropriate and state-of-
the-art for the multipathway and environmental screening risk
assessments conducted in support of RTR.
[[Page 47361]]
Input uncertainty is concerned with how accurately the models have
been configured and parameterized for the assessment at hand. For Tier
1 of the multipathway and environmental screening assessments, we
configured the models to avoid underestimating exposure and risk. This
was accomplished by selecting upper-end values from nationally
representative datasets for the more influential parameters in the
environmental model, including selection and spatial configuration of
the area of interest, lake location and size, meteorology, surface
water, soil characteristics, and structure of the aquatic food web. We
also assume an ingestion exposure scenario and values for human
exposure factors that represent reasonable maximum exposures.
In Tier 2 of the multipathway and environmental screening
assessments, we refine the model inputs to account for meteorological
patterns in the vicinity of the facility versus using upper-end
national values, and we identify the actual location of lakes near the
facility rather than the default lake location that we apply in Tier 1.
By refining the screening approach in Tier 2 to account for local
geographical and meteorological data, we decrease the likelihood that
concentrations in environmental media are overestimated, thereby
increasing the usefulness of the screening assessment. In Tier 3 of the
screening assessments, we refine the model inputs again to account for
hour-by-hour plume rise and the height of the mixing layer. We can also
use those hour-by-hour meteorological data in a TRIM.FaTE run using the
screening configuration corresponding to the lake location. These
refinements produce a more accurate estimate of chemical concentrations
in the media of interest, thereby reducing the uncertainty with those
estimates. The assumptions and the associated uncertainties regarding
the selected ingestion exposure scenario are the same for all three
tiers.
For the environmental screening assessment for acid gases, we
employ a single-tiered approach. We use the modeled air concentrations
and compare those with ecological benchmarks.
For all tiers of the multipathway and environmental screening
assessments, our approach to addressing model input uncertainty is
generally cautious. We choose model inputs from the upper end of the
range of possible values for the influential parameters used in the
models, and we assume that the exposed individual exhibits ingestion
behavior that would lead to a high total exposure. This approach
reduces the likelihood of not identifying high risks for adverse
impacts.
Despite the uncertainties, when individual pollutants or facilities
do not exceed screening threshold emission rates (i.e., screen out), we
are confident that the potential for adverse multipathway impacts on
human health is very low. On the other hand, when individual pollutants
or facilities do exceed screening threshold emission rates, it does not
mean that impacts are significant, only that we cannot rule out that
possibility and that a refined assessment for the site might be
necessary to obtain a more accurate risk characterization for the
source category.
The EPA evaluates the following HAP in the multipathway and/or
environmental risk screening assessments, where applicable: Arsenic,
cadmium, dioxins/furans, lead, mercury (both inorganic and methyl
mercury), POM, HCl, and HF. These HAP represent pollutants that can
cause adverse impacts either through direct exposure to HAP in the air
or through exposure to HAP that are deposited from the air onto soils
and surface waters and then through the environment into the food web.
These HAP represent those HAP for which we can conduct a meaningful
multipathway or environmental screening risk assessment. For other HAP
not included in our screening assessments, the model has not been
parameterized such that it can be used for that purpose. In some cases,
depending on the HAP, we may not have appropriate multipathway models
that allow us to predict the concentration of that pollutant. The EPA
acknowledges that other HAP beyond these that we are evaluating may
have the potential to cause adverse effects and, therefore, the EPA may
evaluate other relevant HAP in the future, as modeling science and
resources allow.
IV. Analytical Results and Proposed Decisions
A. What are the results of the risk assessment and analyses?
1. MVP Source Category
a. Chronic Inhalation Risk Assessment Results
Table 2 of this preamble provides an overall summary of the
inhalation risk results of the MVP source category. The results of the
chronic baseline inhalation cancer risk assessment indicate that, based
on estimates of current actual and allowable emissions, the MIR posed
by the source category was estimated to be less than 1-in-1 million.
The risk driver is acetaldehyde emissions from viscose process
equipment. The total estimated cancer incidence from MVP emission
sources based on actual and allowable emission levels is 0.000006
excess cancer cases per year, or one case in every 167,000 years.
Emissions of acetaldehyde contributed 100 percent to this cancer
incidence. Based upon actual or allowable emissions, no people were
exposed to cancer risks greater than or equal to 1-in-1 million.
The maximum chronic noncancer HI (TOSHI) values for the MVP source
category, based on actual and allowable emissions, were estimated to be
less than 1. Based upon actual and allowable emissions, respiratory
risks were driven by CS2 emissions from viscose process
equipment.
Table 2--MVP Inhalation Risk Assessment Results \1\
--------------------------------------------------------------------------------------------------------------------------------------------------------
Estimated
Maximum population at Maximum Maximum
Number of individual increased Estimated annual chronic refined acute
Risk assessment facilities cancer risk risk of cancer incidence noncancer noncancer HQ
(in 1 million) cancer >=1- (cases per year) TOSHI \3\ \4\
\2\ in-1 million
--------------------------------------------------------------------------------------------------------------------------------------------------------
Baseline Actual Emissions
--------------------------------------------------------------------------------------------------------------------------------------------------------
Source Category...................................... 5 <1 0 0.000006 0.05 0.4
Facility-Wide........................................ 5 1 0 0.00006 0.05 ..............
--------------------------------------------------------------------------------------------------------------------------------------------------------
[[Page 47362]]
Baseline Allowable Emissions
--------------------------------------------------------------------------------------------------------------------------------------------------------
Source Category...................................... 5 <1 0 0.000006 0.05 ..............
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Based on actual, allowable, and facility-wide emissions.
\2\ Maximum individual excess lifetime cancer risk due to HAP emissions from the source category and facility-wide.
\3\ Maximum TOSHI. The target organ with the highest TOSHI for the MVP source category is the respiratory system.
\4\ The maximum estimated acute exposure concentration was divided by available short-term threshold values to develop an array of HQ values. HQ values
shown use the lowest available acute threshold value, which in most cases is the REL. When an HQ exceeds 1, we also show the HQ using the next lowest
available acute dose-response value. The HQ of 0.4 is based upon an acute ERPG-1.
b. Screening Level Acute Risk Assessment Results
Worst-case acute HQs were calculated for every HAP for which there
is an acute health benchmark using actual emissions. The maximum
refined off-site acute noncancer HQ value for the MVP source category
was less than 1 from CS2 emissions (based on the acute (1-
hour) ERPG-1 for CS2). It is also important to note that the
highest HQ is based on hourly emissions multiplier for each emission
process group ranging from 1 to 37 times the annual emissions rate.
Acute HQs are not calculated for allowable or whole facility emissions.
c. Multipathway Risk Screening Results
The five facilities modeled in the MVP source category did not
report any emissions of lead compounds, carcinogenic PB-HAP (arsenic,
dioxin/furans, and POM compounds) or any noncarcinogenic PB-HAP
(cadmium and mercury). Since, there are no PB-HAP or lead compounds
identified in the emissions inventory for this source category, no
further assessment of multipathway risk was conducted.
d. Environmental Risk Screening Results
The five facilities modeled in the MVP source category did not
report any emissions of lead compounds, PB-HAP, or any acid gases (HCl
or HF). Since there are no ecological HAP identified in the emissions
inventory for this source category, no further assessment of ecological
risk was conducted.
e. Facility-Wide Risk Results
Results of the assessment of facility-wide emissions indicate that
none of the five facilities have a facility-wide MIR cancer risk
greater than 1-in-1 million (refer to Table 2). The maximum facility-
wide cancer risk is 1-in-1 million, driven by formaldehyde, cadmium
compounds, and nickel compounds from a non-category fugitive area
source. The total estimated cancer incidence from the whole facility is
0.00006 excess cancer cases per year, or one case in every 16,700
years, with zero people estimated to have cancer risks greater than 1-
in-1 million. The maximum facility-wide chronic noncancer TOSHI is
estimated to be less than 1, driven by source category emissions of
CS2 from viscose process equipment.
2. CEP Source Category
a. Chronic Inhalation Risk Assessment Results
Table 3 of this preamble provides an overall summary of the
inhalation risk results of the CEP source category. The results of the
chronic baseline inhalation cancer risk assessment indicate that, based
on estimates of current actual and allowable emissions, the MIR posed
by the source category was estimated to be 80-in-1 million. The risk
driver is from emissions of ethylene oxide from cellulose ether process
equipment used to produce hydroxyethyl cellulose (HEC). The total
estimated cancer incidence from CEP emission sources based on actual
and allowable emission levels is 0.01 excess cancer cases per year, or
one case in every 100 years. Emissions of ethylene oxide contributed 99
percent to this cancer incidence based upon actual emissions. Based
upon actual or allowable emissions, 105,000 people were exposed to
cancer risks greater than or equal to 1-in-1 million. The maximum
chronic noncancer HI (TOSHI) values for the source category, based on
actual and allowable emissions, were estimated to be less than 1. Based
upon actual and allowable emissions, respiratory risks were driven by
chlorine emissions from cellulose ether process equipment.
Table 3--CEP Inhalation Risk Assessment Results \1\
--------------------------------------------------------------------------------------------------------------------------------------------------------
Estimated
Maximum population at Estimated Maximum Maximum
Number of individual increased annual cancer chronic screening
Risk assessment facilities cancer risk risk of incidence noncancer acute
(in 1 million) cancer >=1-in- (cases per TOSHI \3\ noncancer HQ
1 million year) \4\
--------------------------------------------------------------------------------------------------------------------------------------------------------
Baseline Actual Emissions
--------------------------------------------------------------------------------------------------------------------------------------------------------
Source Category......................................... 3 80 105,000 0.01 0.06 0.1
Facility-Wide........................................... 3 \2\ 500 570,000 0.04 \5\ 4 ..............
--------------------------------------------------------------------------------------------------------------------------------------------------------
[[Page 47363]]
Baseline Allowable Emissions
--------------------------------------------------------------------------------------------------------------------------------------------------------
Source Category......................................... 3 80 112,000 0.01 0.2 ..............
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Based on actual, allowable, and whole facility emissions.
\2\ Maximum individual excess lifetime cancer risk due to ethylene oxide emissions from outside of the source category identified as releases from
holding ponds, storage tanks, tank truck unloading, and equipment/vent releases.
\3\ Maximum TOSHI. The target organ with the highest TOSHI for the CEP source category is the respiratory system.
\4\ The maximum estimated acute exposure concentration was divided by available short-term threshold values to develop an array of HQ values. HQ values
shown use the lowest available acute threshold value, which in most cases is the REL. When an HQ exceeds 1, we also show the HQ using the next lowest
available acute dose-response value.
\5\ Maximum TOSHI from whole facility are from chlorine emissions from non-category sources (classified as other). The target organ with the highest
TOSHI is the respiratory system.
b. Screening Level Acute Risk Assessment Results
Worst-case acute HQs were calculated for every HAP for which there
is an acute health benchmark using actual emissions. The maximum
refined off-site acute noncancer HQ value for the source category was
less than 1 from methanol emissions from cellulose ether process
equipment (based on the acute (1-hour) REL for methanol). It is also
important to note that the highest HQ is based on an hourly emissions
multiplier of 10 times the annual emissions rate. Acute HQs are not
calculated for allowable or whole facility emissions.
c. Multipathway Risk Screening Results
One facility within the CEP source category reported emissions of
multipathway pollutants of lead compounds, carcinogenic PB-HAP
(arsenic), and noncarcinogenic PB-HAP (cadmium and mercury). Results of
the worst-case Tier 1 screening analysis indicate that PB-HAP emissions
(based on estimates of actual emissions) emitted from the facility
exceeded the screening values for the carcinogenic PB-HAP (arsenic
compounds) by a factor of 2 and for the noncarcinogenic PB-HAP (cadmium
and mercury) was equal to the Tier 1 screening value of 1. Based on
this Tier 1 screening assessment for carcinogens, the arsenic, cadmium,
and mercury emission rates for the single facility were below our level
of concern. In evaluating the potential for multipathway effects from
emissions of lead, we compared modeled annual lead concentrations to
the secondary NAAQS for lead (0.15 [mu]g/m\3\). The highest annual
average lead concentration of 0.00001 [micro]g/m\3\ is well below the
NAAQS for lead, indicating a low potential for multipathway impacts of
concern due to lead.
d. Environmental Risk Screening Results
As described in section III.A of this preamble, we conducted an
environmental risk screening assessment for the CEP source category.
The three facilities modeled in the source category reported emissions
of lead compounds and the above PB-HAP, as well as an acid gas (HCl).
In the Tier 1 screening analysis for PB-HAP, we did not find any
exceedances of the ecological benchmarks evaluated. For lead, we did
not estimate any exceedances of the secondary lead NAAQS. For HCl, the
average modeled concentration around each facility (i.e., the average
concentration of all off-site data points in the modeling domain) did
not exceed any ecological benchmark. In addition, each individual
modeled concentration of HCl (i.e., each off-site data point in the
modeling domain) was below the ecological benchmarks for all
facilities. Based on the results of the environmental risk screening
analysis, we do not expect an adverse environmental effect as a result
of HAP emissions from this source category.
e. Facility-Wide Risk Results
Results of the assessment of facility-wide emissions indicate that
all three facilities modeled have a facility-wide MIR cancer risk
greater than 1-in-1 million (refer to Table 3). The maximum facility-
wide cancer risk is 500-in-1 million, mainly driven by ethylene oxide
from sources outside the source category, including holding ponds,
storage tanks, tank truck unloading, and equipment/vent releases. The
next highest cancer risk was 80-in-1 million, based on whole facility
emissions of ethylene oxide. The total estimated cancer incidence from
the whole facility is 0.04 excess cancer cases per year, or one case in
every 25 years, with 570,000 people estimated to have cancer risks
greater than 1-in-1 million and 2,000 people with risks greater than
100-in-1 million. The maximum facility-wide chronic noncancer TOSHI is
estimated to be equal to 4, driven by emissions of chlorine from non-
category sources.
3. What demographic groups might benefit from this regulation?
To examine the potential for any environmental justice issues that
might be associated with the MVP and CEP source categories, we
performed a demographic analysis, which is an assessment of risks to
individual demographic groups of the populations living within 5 km and
within 50 km of the facilities. In the analysis, we evaluated the
distribution of HAP-related cancer and noncancer risks from the MVP and
CEP source categories across different demographic groups within the
populations living near facilities.
For the MVP source category demographic analysis, the results for
various demographic groups are based on the estimated risk from actual
emissions levels for the population living within 50 km of the
facilities. When examining the risk levels of those exposed to
emissions from MVP facilities, we find that no one is exposed to a
cancer risk at or above 1-in-1 million or to a chronic noncancer TOSHI
greater than 1. The methodology and the results of the MVP demographic
analysis are presented in a technical report, Risk and Technology
Review--Analysis of Demographic Factors for Populations Living Near
Miscellaneous Viscose Processes Facilities, available in the docket for
this action.
The results of the CEP demographic analysis are summarized in Table
4 below. These results, for various demographic groups, are based on
the
[[Page 47364]]
estimated risk from actual emissions levels for the population living
within 50 km of the CEP facilities.
Table 4--CEP Demographic Risk Analysis Results
[CEP Source Category Demographic Assessment Results--50 km Study Area Radius]
----------------------------------------------------------------------------------------------------------------
Population
with cancer Population
risk greater with hazard
than or equal index greater
to 1-in-1 than 1
million
----------------------------------------------------------------------------------------------------------------
Nationwide Source Category
----------------------------------------------------------------------------------------------------------------
Total Population................................................ 317,746,049 104,572 0
----------------------------------------------------------------------------------------------------------------
White and Minority by Percent
----------------------------------------------------------------------------------------------------------------
White........................................................... 62 51 0
Minority........................................................ 38 49 0
----------------------------------------------------------------------------------------------------------------
Minority by Percent
----------------------------------------------------------------------------------------------------------------
African American................................................ 12 37 0
Native American................................................. 0.8 0.3 0
Hispanic or Latino (includes white and nonwhite)................ 18 7 0
Other and Multiracial........................................... 7 4 0
----------------------------------------------------------------------------------------------------------------
Income by Percent
----------------------------------------------------------------------------------------------------------------
Below Poverty Level............................................. 14 12 0
Above Poverty Level............................................. 86 88 0
----------------------------------------------------------------------------------------------------------------
Education by Percent
----------------------------------------------------------------------------------------------------------------
Over 25 and without a High School Diploma....................... 14 16 0
Over 25 and with a High School Diploma.......................... 86 84 0
----------------------------------------------------------------------------------------------------------------
Linguistically Isolated by Percent
----------------------------------------------------------------------------------------------------------------
Linguistically Isolated......................................... 6 1 0
----------------------------------------------------------------------------------------------------------------
The results of the CEP source category demographic analysis
indicate that emissions from the source category expose approximately
104,572 people to a cancer risk at or above 1-in-1 million and
approximately zero people to a chronic noncancer TOSHI greater than 1.
The percentages of the at-risk population in three demographic groups
(African American, above poverty level, and over 25 without highs
school diploma) are greater than their respective nationwide
percentages. The methodology and the results of the CEP demographic
analysis are presented in the technical report, Risk and Technology
Review--Analysis of Demographic Factors for Populations Living Near
Cellulose Ethers Production Facilities, available in the docket for
this action.
B. What are our proposed decisions regarding risk acceptability, ample
margin of safety, and adverse environmental effect?
1. Risk Acceptability
As noted in section II.A of this preamble, the EPA sets standards
under CAA section 112(f)(2) using ``a two-step standard-setting
approach, with an analytical first step to determine an `acceptable
risk' that considers all health information, including risk estimation
uncertainty, and includes a presumptive limit on MIR of approximately
1-in-10 thousand.'' (54 FR 38045, September 14, 1989).
In this proposal, the EPA estimated risks based on actual and
allowable emissions from the MVP and CEP source categories. In
determining whether risks are acceptable, the EPA considered all
available health information and risk estimation uncertainty, as
described above. The results for the MVP and CEP source categories
indicate that both the actual and allowable inhalation cancer risks to
the individual most exposed are below the presumptive limit of
acceptability of 100-in-1 million.
The results for the MVP source category indicate that both the
actual and allowable inhalation cancer risks to the individual most
exposed are less than 1-in-1 million, well below the presumptive limit
of acceptability of 100-in-1 million. The MVP source category also has
chronic noncancer inhalation exposures to HAP with health benchmarks
with TOSHI values less than 1 (0.05), 20 times below an exposure that
the EPA has determined is without appreciable risk of adverse health
effects. Exposures to HAP associated with acute noncancer health
effects also are below levels of health concern with no HAP exposures
resulting in an HQ greater than 1 (0.4) based upon the 1-hour REL.
The results for the CEP source category indicate that both the
actual and allowable inhalation cancer risks to the individual most
exposed are less or equal to 80-in-1 million, below the presumptive
limit of acceptability of
[[Page 47365]]
100-in-1 million. EPA estimates emissions from the 3 facilities in the
source category would result in a cancer incidence of 0.01 excess
cancer cases per year, or one case every 100 years based upon actual
emissions from the source category. This incidence rate is solely from
1 facility emitting ethylene oxide. We estimate 105,000 individuals are
exposed to an inhalation cancer risk equal to or greater than 1-in-1
million from this one facility. Inhalation exposures to HAP associated
with chronic noncancer health effects result in a TOSHI of 0.06 based
on actual emissions, 16 times below an exposure that the EPA has
determined is without appreciable risk of adverse health effects.
Exposures to HAP associated with acute noncancer health effects also
are below levels of health concern with no HAP exposures resulting in
an HQ greater than 1 (0.1) based upon the 1-hour REL.
Multipathway screen values for the CEP source category are below a
level of concern for both carcinogenic and non-carcinogenic PB-HAP as
well as emissions of lead compounds. Maximum cancer and noncancer risk
due to ingestion exposures estimated using Tier 1 health-protective
risk screening assumptions are below 2-in-1 million for cancer and
equal to 1 based upon Tier 1 noncancer screen values for mercury.
Taking into account this information, the EPA proposes that the
risks remaining after implementation of the existing MACT standards for
the CEP and MVP source categories are acceptable.
2. Ample Margin of Safety Analysis
The inhalation cancer risk from the MVP source category is less
than 1-in-1 million and the chronic noncancer TOSHI due to inhalation
exposures is less than 1. Additionally, the results of the MVP acute
screening analysis showed that risks were below a level of concern.
Because we are proposing that risks from the MVP source category are
acceptable and below the thresholds of concern, we are proposing that
the current MACT standards applicable to the MVP source category
provide an ample margin of safety to protect public health.
Although we are proposing that the risks from the three modeled
facilities within the CEP source category are acceptable, the MIR for
actual and allowable emissions are 80-in-1 million caused by ethylene
oxide emissions from the HEC process. We considered whether the MACT
standards applicable to these emission points in particular, as well as
all the current MACT standards applicable to this source category,
provide an ample margin of safety to protect public health. As directed
by CAA section 112(f)(2), we conducted an analysis to determine if the
current emission standards provide an ample margin of safety to protect
public health. Under the ample margin of safety analysis, we evaluated
the cost and feasibility of available control technologies and other
measures (including those considered under the technology review) that
could be applied to the CEP source category to further reduce the risks
(or potential risks) due to emissions of HAP identified in the risk
assessment.
The HEC production process utilizes purified wood pulp or cotton
linters to produce alkali cellulose by adding a caustic solution. The
alkali cellulose is then reacted with ethylene oxide to produce HEC,
which is a thickening agent used in cosmetics, cleaning solutions, and
other household products. This process utilizes extended cook-out
procedures to reduce the amount of ethylene oxide not consumed during
the HEC reaction in conjunction with an add-on control device. This
process is subject to standard 3 in Table 1 to Subpart UUUU of Part
63--Emission Limits and Work Practice Standards, which requires a 99-
percent reduction in HAP emissions.
As discussed in section IV.C below and in the memo titled
Technology Review for the Cellulose Products Manufacturing Industry--
Proposed Rule in the docket for this rulemaking, we did not identify
any developments in processes, practices, or controls for the CEP
source category during our analysis for this proposal. CEP facilities
use scrubbers to control emissions of ethylene oxide, as well as other
HAP, and these devices are capable of achieving high levels of emission
reductions. We did not identify additional technologies capable of
further reducing emissions, or improvements to existing technologies
that would result in further reduction of emissions. Given that we did
not identify any developments in practices, processes, or control
technologies and the acceptable risks remaining after implementation of
the NESHAP, we are proposing that the existing standards for the CEP
source category provide an ample margin of safety to protect public
health, and revision of the standards is not required.
Lastly, regarding the facility-wide risks due to ethylene oxide
(described above), which are due primarily to emission sources that are
not part of the CEP source category, we intend to evaluate these
facility-wide estimated emissions and risks further and may address
them in a separate future action, as appropriate. In particular, the
EPA is addressing ethylene oxide in response to the results of the
latest National Air Toxics Assessment (NATA) released in August 2018,
which identified the chemical as a potential concern in several areas
across the country. (NATA is the Agency's nationwide air toxics
screening tool, designed to help the EPA and state, local, and tribal
air agencies identify areas, pollutants, or types of sources for
further examination.) The latest NATA estimates that ethylene oxide
significantly contributes to potential elevated cancer risks in some
census tracts across the U.S. (less than 1 percent of the total number
of tracts). These elevated risks are largely driven by an EPA risk
value that was updated in late 2016. The EPA will work with industry
and state, local, and tribal air agencies as the EPA takes a two-
pronged approach to address ethylene oxide emissions: (1) Reviewing
and, as appropriate, revising CAA regulations for facilities that emit
ethylene oxide--starting with air toxics emissions standards for
miscellaneous organic chemical manufacturing facilities and commercial
sterilizers; and (2) conducting site-specific risk assessments and, as
necessary, implementing emission control strategies for targeted high-
risk facilities. The EPA will post updates on its work to address
ethylene oxide on its website at: https://www.epa.gov/ethylene-oxide.
3. Adverse Environmental Effect
For the MVP source category, we did not identify emissions of any
environmental HAP. Because we did not identify any environmental HAP
emissions, we expect no adverse environmental effects and are proposing
that more stringent standards are not necessary to prevent an adverse
environmental effect.
For the CEP source category, our analyses showed no exceedances of
ecological benchmarks and, therefore, we do not expect there to be an
adverse environmental effect as a result of HAP emissions from this
source category. We are proposing that it is not necessary to set a
more stringent standard to prevent an adverse environmental effect.
C. What are the results and proposed decisions based on our technology
review?
As described in section III.B of this preamble, our technology
review focused on identifying developments in practices, processes, and
control technologies for control of HAP emissions from CEP and MVP
facilities.
[[Page 47366]]
In conducting the technology review, we reviewed sources of information
on practices, processes, and control technologies that were not
considered during the development of the Cellulose Products
Manufacturing NESHAP, as well as looked for information on improvements
in practices, processes, and control technologies that have occurred
since the development of the NESHAP. The review included reviewing the
industry responses to Part 2 of the sector survey, a search of the RBLC
database and the EPA's ADI, reviews of air permits, and a review of
relevant literature. After reviewing the information from the
aforementioned sources, we did not identify any developments in
practices, processes, or control technologies to reduce HAP emissions
from the CEP and MVP source categories. Therefore, we are proposing
that revisions to the NESHAP are not necessary based on our review
under CAA section 112(d)(6).
While these searches did not result in a finding of any new
technologies, the results of the ADI search suggest that the EPA could
add biofilter effluent conductivity operating limits and parameter
monitoring as an alternative to biofilter pH operating limits and
monitoring. This is discussed in section IV.D below. Additional details
of our technology review can be found in the memorandum titled
Technology Review for the Cellulose Products Manufacturing Industry--
Proposed Rule, which is available in the docket for this action.
D. What other actions are we proposing?
In addition to the proposed actions described above, we are
proposing additional revisions to the NESHAP. We are proposing
revisions to the SSM provisions of the MACT rule in order to ensure
that they are consistent with the Court decision in Sierra Club v. EPA,
551 F. 3d 1019 (D.C. Cir. 2008), which vacated two provisions that
exempted sources from the requirement to comply with otherwise
applicable CAA section 112(d) emission standards during periods of SSM.
We also are proposing various other changes, including electronic
submittal of notifications, compliance reports, and performance test
reports; addition of periodic emissions testing requirements and
incorporation by reference (IBR) of three test methods (listed in
section IV.D.5 below); and various technical and editorial changes. Our
analyses and proposed changes related to these issues are discussed
below.
1. SSM
In its 2008 decision in Sierra Club v. EPA, 551 F.3d 1019 (D.C.
Cir. 2008), the Court vacated portions of two provisions in the EPA's
CAA section 112 regulations governing the emissions of HAP during
periods of SSM. Specifically, the Court vacated the SSM exemption
contained in 40 CFR 63.6(f)(1) and 40 CFR 63.6(h)(1), holding that
under section 302(k) of the CAA, emissions standards or limitations
must be continuous in nature and that the SSM exemption violates the
CAA's requirement that some section 112 standards apply continuously.
We are proposing the elimination of the SSM exemption in this rule
which appears at 40 CFR 63.5515 and Table 10 to Subpart UUUU of Part 63
(Applicability of General Provisions to Subpart UUUU). Consistent with
Sierra Club v. EPA, we are proposing standards in this rule that apply
at all times. We are also proposing several revisions to Table 10 (the
General Provisions Applicability Table) as is explained in more detail
below. For example, we are proposing to eliminate the incorporation of
the General Provisions' requirement that the source develop an SSM
plan. We also are proposing to eliminate and revise certain
recordkeeping and reporting requirements related to the SSM exemption
as further described below.
The EPA has attempted to ensure that the provisions we are
proposing to eliminate are inappropriate, unnecessary, or redundant in
the absence of the SSM exemption. We are specifically seeking comment
on whether we have successfully done so.
In proposing the standards in this rule, the EPA has taken into
account startup and shutdown periods and, for the reasons explained
below, has not proposed alternate emission standards for those periods.
However, the EPA is proposing alternative operating limits for periods
of startup and shutdown for thermal oxidizers and scrubbers to address
issues with parameter monitoring during these periods.
As discussed in the memorandum titled Summary of the Startup and
Shutdown Data for Cellulose Products Manufacturing, we requested data
regarding periods of startup and shutdown as part of the 2018 survey.
Facilities did not indicate difficulty meeting the emission standards
as a result of startup or shutdown events. However, facilities did
indicate difficulty meeting thermal oxidizer and scrubber operating
parameters during these periods. This is not unexpected because these
periods reflect non-steady state operations and production. For sources
equipped with thermal oxidizers, survey responses indicated that they
could not meet the setpoint temperature during periods of startup. This
is likely due to a temperature drop when the HAP-laden air stream is
initially added to the oxidizer. Survey responses indicated that, for
sources equipped with scrubbers (wet, water, and caustic), pressure
drop, liquid-to-gas ratios, and scrubber liquid flow rate parameter
limits could not be met during startup and shutdown. This is not
unexpected since pluggage can occur during non-stable conditions,
limiting the liquid flow rate and subsequently reducing the pressure
drop across the scrubber due to the lack of liquid flow. Consequently,
the EPA is proposing the following alternative operating parameter
options to demonstrate continuous compliance and ensure proper control
device operations during periods of startup and shutdown:
Wet or caustic scrubber: As an alternative to pressure
drop, liquid flow rate, or liquid-to-gas ratio, confirm that the
scrubber is operating properly prior to emission unit startup and
continue operation until emission unit shutdown is complete.
Appropriate startup and shutdown operating parameters may be based on
equipment design, manufacturer's recommendations, or other site-
specific operating values established for normal operating periods. Do
not include these parameters when determining the daily average.
Thermal oxidizer: As an alternative to the minimum firebox
temperature, confirm that the oxidizer is operating properly prior to
emission unit startup (e.g., firebox temperature has reached the
setpoint temperature established in the most recent stack test). Do not
include these parameters when determining the daily average.
The survey responses for other control devices did not indicate any
issues meeting operating parameters during periods of startup and
shutdown. One additional survey response requested the addition of a
shutdown work practice for process lines and equipment venting. This
response suggested that, in the event of a shutdown, it would be
appropriate to purge the process gas and/or liquid to an emission
control device, recovery device, or return to the process.
Additionally, the response suggested that gas streams may be emitted if
they contain less than 50 pounds of volatile organic compounds (VOC) or
the lower explosive limit is less than 10 percent. The Agency is
requesting comment to determine if this
[[Page 47367]]
would be an appropriate work practice. Emissions from venting due to
shutdown should be accounted for in the compliance demonstration in the
semiannual compliance report.
Periods of startup, normal operations, and shutdown are all
predictable and routine aspects of a source's operations. Malfunctions,
in contrast, are neither predictable nor routine. Instead they are, by
definition, sudden, infrequent, and not reasonably preventable failures
of emissions control, process, or monitoring equipment. (40 CFR 63.2)
(Definition of malfunction). The EPA interprets CAA section 112 as not
requiring emissions that occur during periods of malfunction to be
factored into development of CAA section 112 standards and this reading
has been upheld as reasonable by the Court in U.S. Sugar Corp. v. EPA,
830 F.3d 579, 606-610 (2016). Under CAA section 112, emissions
standards for new sources must be no less stringent than the level
``achieved'' by the best controlled similar source and for existing
sources generally must be no less stringent than the average emission
limitation ``achieved'' by the best performing 12 percent of sources in
the category. There is nothing in CAA section 112 that directs the
Agency to consider malfunctions in determining the level ``achieved''
by the best performing sources when setting emission standards. As the
Court has recognized, the phrase ``average emissions limitation
achieved by the best performing 12 percent of'' sources ``says nothing
about how the performance of the best units is to be calculated.''
Nat'l Ass'n of Clean Water Agencies v. EPA, 734 F.3d 1115, 1141 (D.C.
Cir. 2013). While the EPA accounts for variability in setting emissions
standards, nothing in CAA section 112 requires the Agency to consider
malfunctions as part of that analysis. The EPA is not required to treat
a malfunction in the same manner as the type of variation in
performance that occurs during routine operations of a source. A
malfunction is a failure of the source to perform in a ``normal or
usual manner'' and no statutory language compels the EPA to consider
such events in setting CAA section 112 standards.
As the Court recognized in U.S. Sugar Corp, accounting for
malfunctions in setting standards would be difficult, if not
impossible, given the myriad different types of malfunctions that can
occur across all sources in the category and given the difficulties
associated with predicting or accounting for the frequency, degree, and
duration of various malfunctions that might occur. Id. at 608 (``the
EPA would have to conceive of a standard that could apply equally to
the wide range of possible boiler malfunctions, ranging from an
explosion to minor mechanical defects. Any possible standard is likely
to be hopelessly generic to govern such a wide array of
circumstances.'') As such, the performance of units that are
malfunctioning is not ``reasonably'' foreseeable. See, e.g., Sierra
Club v. EPA, 167 F.3d 658, 662 (D.C. Cir. 1999) (``The EPA typically
has wide latitude in determining the extent of data-gathering necessary
to solve a problem. We generally defer to an agency's decision to
proceed on the basis of imperfect scientific information, rather than
to `invest the resources to conduct the perfect study.' '') See also,
Weyerhaeuser v. Costle, 590 F.2d 1011, 1058 (D.C. Cir. 1978) (``In the
nature of things, no general limit, individual permit, or even any
upset provision can anticipate all upset situations. After a certain
point, the transgression of regulatory limits caused by `uncontrollable
acts of third parties,' such as strikes, sabotage, operator
intoxication or insanity, and a variety of other eventualities, must be
a matter for the administrative exercise of case-by-case enforcement
discretion, not for specification in advance by regulation.''). In
addition, emissions during a malfunction event can be significantly
higher than emissions at any other time of source operation. For
example, if an air pollution control device with 99-percent removal
goes off-line as a result of a malfunction (as might happen if, for
example, the bags in a baghouse catch fire) and the emission unit is a
steady state type unit that would take days to shut down, the source
would go from 99-percent control to zero control until the control
device was repaired. The source's emissions during the malfunction
would be 100 times higher than during normal operations. As such, the
emissions over a 4-day malfunction period would exceed the annual
emissions of the source during normal operations. As this example
illustrates, accounting for malfunctions could lead to standards that
are not reflective of (and significantly less stringent than) levels
that are achieved by a well-performing non-malfunctioning source. It is
reasonable to interpret CAA section 112 to avoid such a result. The
EPA's approach to malfunctions is consistent with CAA section 112 and
is a reasonable interpretation of the statute.
Although no statutory language compels the EPA to set standards for
malfunctions, the EPA has the discretion to do so where feasible. For
example, in the Petroleum Refinery Sector RTR, the EPA established a
work practice standard for unique types of malfunction that result in
releases from pressure relief devices or emergency flaring events
because the EPA had information to determine that such work practices
reflected the level of control that applies to the best performers. 80
FR 75178, 75211-14 (December 1, 2015). The EPA will consider whether
circumstances warrant setting standards for a particular type of
malfunction and, if so, whether the EPA has sufficient information to
identify the relevant best performing sources and establish a standard
for such malfunctions. We also encourage commenters to provide any such
information.
The EPA anticipates that it is unlikely that a malfunction will
result in a violation of the standard for this source category. For
example, facilities using thermal oxidizers as pollution control
equipment indicated in the 2018 survey that interlocks would shut down
the process if an oxidizer malfunction occurred, and facilities may
also have back-up oxidizers that could be used to treat the emissions.
The MACT standards are based on a percent reduction of HAP over a 6-
month rolling period per group of equipment. Therefore, the malfunction
of a singular piece of equipment in a single month over this period is
unlikely to result in an exceedance of the standard. The EPA is
soliciting information on the type of events that constitute a
malfunction event, and best practices and best level of emission
control during malfunction events. The EPA is also soliciting
information on the cost savings associated with these practices. In
addition, the EPA is soliciting specific supporting data on HAP
emissions during malfunction events for the MVP and CEP source
categories, including the cause of malfunctions, the frequency of
malfunctions, the duration of malfunctions, and the estimate of HAP
emitted during each malfunction.
In the unlikely event that a source fails to comply with the
applicable CAA section 112(d) standards as a result of a malfunction
event, the EPA would determine an appropriate response based on, among
other things, the good faith efforts of the source to minimize
emissions during malfunction periods, including preventative and
corrective actions, as well as root cause analyses to ascertain and
rectify excess emissions. The EPA would also consider whether the
source's failure to comply with the CAA section 112(d) standard was, in
fact, sudden, infrequent, not reasonably preventable
[[Page 47368]]
and was not instead caused in part by poor maintenance or careless
operation. 40 CFR 63.2 (definition of malfunction).
If the EPA determines in a particular case that an enforcement
action against a source for violation of an emission standard is
warranted, the source can raise any and all defenses in that
enforcement action and the federal district court will determine what,
if any, relief is appropriate. The same is true for citizen enforcement
actions. Similarly, the presiding officer in an administrative
proceeding can consider any defense raised and determine whether
administrative penalties are appropriate.
In summary, the EPA interpretation of the CAA and, in particular,
section 112, is reasonable and encourages practices that will avoid
malfunctions. Administrative and judicial procedures for addressing
exceedances of the standards fully recognize that violations may occur
despite good faith efforts to comply and can accommodate those
situations. U.S. Sugar Corp. v. EPA, 830 F.3d 579, 606-610 (2016).
a. General Duty
We are proposing to revise the General Provisions table (Table 10)
entry for 40 CFR 63.6(e)(1) and (2) by redesignating it as 40 CFR
63.6(e)(1)(i) and changing the ``yes'' in column 4 to a ``no.'' Section
63.6(e)(1)(i) describes the general duty to minimize emissions. Some of
the language in that section is no longer necessary or appropriate in
light of the elimination of the SSM exemption. We are proposing instead
to add general duty regulatory text at 40 CFR 63.5515 that reflects the
general duty to minimize emissions while eliminating the reference to
periods covered by an SSM exemption. The current language in 40 CFR
63.6(e)(1)(i) characterizes what the general duty entails during
periods of SSM. With the elimination of the SSM exemption, there is no
need to differentiate between normal operations, startup and shutdown,
and malfunction events in describing the general duty. Therefore, the
language the EPA is proposing for 40 CFR 63.5515 does not include that
language from 40 CFR 63.6(e)(1).
We are also proposing to revise the General Provisions table (Table
10) by adding an entry for 40 CFR 63.6(e)(1)(ii) and including a ``no''
in column 4. Section 63.6(e)(1)(ii) imposes requirements that are not
necessary with the elimination of the SSM exemption or are redundant
with the general duty requirement being added at 40 CFR 63.5515.
b. SSM Plan
We are proposing to revise the General Provisions table (Table 10)
entry for 40 CFR 63.6(e)(3) by changing the ``yes'' in column 4 to a
``no.'' Generally, the paragraphs under 40 CFR 63.6(e)(3) require
development of an SSM plan and specify SSM recordkeeping and reporting
requirements related to the SSM plan. As noted, the EPA is proposing to
remove the SSM exemptions. Therefore, affected units will be subject to
an emission standard during such events. The applicability of a
standard during such events will ensure that sources have ample
incentive to plan for and achieve compliance and, thus, the SSM plan
requirements are no longer necessary.
c. Compliance With Standards
We are proposing to revise the General Provisions table (Table 10)
entry for 40 CFR 63.6(f)(1) by changing the ``yes'' in column 4 to a
``no.'' The current language of 40 CFR 63.6(f)(1) exempts sources from
non-opacity standards during periods of SSM. As discussed above, the
Court in Sierra Club vacated the exemptions contained in this provision
and held that the CAA requires that some CAA section 112 standard apply
continuously. Consistent with Sierra Club, the EPA is proposing to
revise standards in this rule to apply at all times.
We are proposing to revise the General Provisions table (Table 10)
entry for 40 CFR 63.6(h) by redesignating it as 40 CFR 63.6(h)(1) and
changing the ``yes'' in column 4 to a ``no.'' The current language of
40 CFR 63.6(h)(1) exempts sources from opacity standards during periods
of SSM. As discussed above, the Court in Sierra Club vacated the
exemptions contained in this provision and held that the CAA requires
that some CAA section 112 standard apply continuously. Consistent with
Sierra Club, the EPA is proposing to revise standards in this rule to
apply at all times.
d. Performance Testing
We are proposing to revise the General Provisions table (Table 10)
entry for 40 CFR 63.7(e)(1) by changing the ``yes'' in column 4 to a
``no.'' Section 63.7(e)(1) describes performance testing requirements.
The EPA is instead proposing to add a performance testing requirement
at 40 CFR 63.5535. The performance testing requirements we are
proposing to add differ from the General Provisions performance testing
provisions in several respects. The regulatory text does not include
the language in 40 CFR 63.7(e)(1) that restated the SSM exemption and
language that precluded startup and shutdown periods from being
considered ``representative'' for purposes of performance testing. The
proposed performance testing provisions do not allow performance
testing during startup or shutdown. As in 40 CFR 63.7(e)(1),
performance tests conducted under this subpart should not be conducted
during malfunctions because conditions during malfunctions are often
not representative of normal operating conditions. The EPA is proposing
to add language that requires the owner or operator to record the
process information that is necessary to document operating conditions
during the test and include in such record an explanation to support
that such conditions represent normal operation. Section 63.7(e)
requires that the owner or operator make available to the Administrator
such records ``as may be necessary to determine the condition of the
performance test'' available to the Administrator upon request but does
not specifically require the information to be recorded. The regulatory
text the EPA is proposing to add to this provision builds on that
requirement and makes explicit the requirement to record the
information.
e. Monitoring
We are proposing to revise the General Provisions table (Table 10)
entries for 40 CFR 63.8(c)(1)(i) and (iii) by changing the ``yes'' in
column 4 to a ``no.'' The cross-references to the general duty and SSM
plan requirements in those subparagraphs are not necessary in light of
other requirements of 40 CFR 63.8 that require good air pollution
control practices (40 CFR 63.8(c)(1)) and that set out the requirements
of a quality control program for monitoring equipment (40 CFR 63.8(d)).
We are proposing to revise the General Provisions table (Table 10)
by adding an entry for 40 CFR 63.8(d)(3) and including a ``no'' in
column 4. The final sentence in 40 CFR 63.8(d)(3) refers to the General
Provisions' SSM plan requirement which is no longer applicable. The EPA
is proposing to add to the rule at Table 9 that is identical to 40 CFR
63.8(d)(3) except that the final sentence is replaced with the
following sentence: ``The program of corrective action should be
included in the plan required under Sec. 63.8(d)(2).''
f. Recordkeeping
We are proposing to revise the General Provisions table (Table 10)
entry for 40 CFR 63.10(b)(2)(i) through
[[Page 47369]]
(iv) by redesignating it as 40 CFR 63.10(b)(2)(i) and changing the
``yes'' in column 4 to a ``no.'' Section 63.10(b)(2)(i) describes the
recordkeeping requirements during startup and shutdown. We are instead
proposing to add recordkeeping requirements to Table 9. When a source
is subject to a different standard during startup and shutdown, it will
be important to know when such startup and shutdown periods begin and
end in order to determine compliance with the appropriate standard.
Thus, the EPA is proposing to add language to Table 9 requiring that
sources subject to an emission standard during startup or shutdown that
differs from the emission standard that applies at all other times must
report the date, time, and duration of such periods. The EPA is also
proposing that sources would be required to record information
supporting the operating parameter alternatives, including (1) an
indication that thermal oxidizers reach set point temperature prior to
emission unit startup, and (2) an indication that scrubbers are
properly operating prior to emission unit startup. The proposed records
are required to demonstrate that alternative operating parameter limits
have been met during periods of startup and shutdown.
We are proposing to revise the General Provisions table (Table 10)
by adding an entry for 40 CFR 63.10(b)(2)(ii) and including a ``no'' in
column 4. Section 63.10(b)(2)(ii) describes the recordkeeping
requirements during a malfunction. The EPA is proposing to add such
requirements to Table 9. The regulatory text we are proposing to add
differs from the General Provisions it is replacing in that the General
Provisions requires the creation and retention of a record of the
occurrence and duration of each malfunction of process, air pollution
control, and monitoring equipment. The EPA is proposing that this
requirement apply to any failure to meet an applicable standard and is
requiring that the source record the date, time, and duration of the
failure rather than the ``occurrence.'' The EPA is also proposing to
add to Table 9 a requirement that sources keep records that include a
list of the affected source or equipment and actions taken to minimize
emissions, an estimate of the quantity of each regulated pollutant
emitted over the standard for which the source failed to meet the
standard, and a description of the method used to estimate the
emissions. Examples of such methods would include product-loss
calculations, mass balance calculations, measurements when available,
or engineering judgment based on known process parameters. The EPA is
proposing to require that sources keep records of this information to
ensure that there is adequate information to allow the EPA to determine
the severity of any failure to meet a standard, and to provide data
that may document how the source met the general duty to minimize
emissions when the source has failed to meet an applicable standard.
We are proposing to revise the General Provisions table (Table 10)
by adding an entry for 40 CFR 63.10(b)(2)(iv) and including a ``no'' in
column 4. When applicable, the provision requires sources to record
actions taken during SSM events when actions were inconsistent with
their SSM plan. The requirement is no longer appropriate because SSM
plans will no longer be required. The requirement previously applicable
under 40 CFR 63.10(b)(2)(iv)(B) to record actions to minimize emissions
and record corrective actions is now applicable by reference to Table
9.
We are proposing to revise the General Provisions table (Table 10)
by adding 40 CFR 63.10(b)(2)(v) to the entry for 40 CFR
63.10(b)(2)(iv), which includes a ``no'' in column 4. When applicable,
the provision requires sources to record actions taken during SSM
events to show that actions taken were consistent with their SSM plan.
The requirement is no longer appropriate because SSM plans will no
longer be required.
We are proposing to revise the General Provisions table (Table 10)
by adding an entry for 40 CFR 63.10(c)(15) and including a ``no'' in
column 4. The EPA is proposing that 40 CFR 63.10(c)(15) no longer
apply. When applicable, the provision allows an owner or operator to
use the affected source's startup, shutdown, and malfunction plan or
records kept to satisfy the recordkeeping requirements of the startup,
shutdown, and malfunction plan, specified in 40 CFR 63.6(e), to also
satisfy the requirements of 40 CFR 63.10(c)(10) through (12). The EPA
is proposing to eliminate this requirement because SSM plans would no
longer be required, and, therefore, 40 CFR 63.10(c)(15) no longer
serves any useful purpose for affected units.
g. Reporting
We are proposing to revise the General Provisions table (Table 10)
entry for 40 CFR 63.10(d)(5) by redesignating it as 40 CFR
63.10(d)(5)(i) and changing the ``yes'' in column 4 to a ``no.''
Section 63.10(d)(5)(i) describes the periodic reporting requirements
for startups, shutdowns, and malfunctions. To replace the General
Provisions reporting requirement, the EPA is proposing to add reporting
requirements to 40 CFR 63.5580 and Table 8. The replacement language
differs from the General Provisions requirement in that it eliminates
periodic SSM reports as a stand-alone report. We are proposing language
that requires sources that fail to meet an applicable standard at any
time to report the information concerning such events in the semiannual
compliance report already required under this rule. We are proposing
that the report must contain the number, date, time, duration, and the
cause of such events (including unknown cause, if applicable), a list
of the affected source or equipment, an estimate of the quantity of
each regulated pollutant emitted over any emission limit, and a
description of the method used to estimate the emissions.
Examples of such methods would include product-loss calculations,
mass balance calculations, measurements when available, or engineering
judgment based on known process parameters. The EPA is proposing this
requirement to ensure that there is adequate information to determine
compliance, to allow the EPA to determine the severity of the failure
to meet an applicable standard, and to provide data that may document
how the source met the general duty to minimize emissions during a
failure to meet an applicable standard.
We will no longer require owners or operators to determine whether
actions taken to correct a malfunction are consistent with an SSM plan,
because plans would no longer be required. The proposed amendments,
therefore, eliminate the cross-reference to 40 CFR 63.10(d)(5)(i) that
contains the description of the previously required SSM report format
and submittal schedule from this section. These specifications are no
longer necessary because the events will be reported in otherwise
required reports with similar format and submittal requirements.
We are proposing to revise the General Provisions table (Table 10)
by adding an entry for 40 CFR 63.10(d)(5)(ii) and including a ``no'' in
column 4. Section 63.10(d)(5)(ii) describes an immediate report for
startups, shutdown, and malfunctions when a source failed to meet an
applicable standard but did not follow the SSM plan. We will no longer
require owners and operators to report when actions taken during a
startup, shutdown, or malfunction were not
[[Page 47370]]
consistent with an SSM plan, because plans would no longer be required.
2. 5-Year Periodic Emissions Testing
As part of an ongoing effort to improve compliance with various
federal air emission regulations, the EPA reviewed the testing and
monitoring requirements of 40 CFR part 63, subpart UUUU and is
proposing the following change. The EPA is proposing to require
facilities that use non-recovery control devices to conduct periodic
air emissions performance testing, with the first of the periodic
performance tests to be conducted within 3 years of the effective date
of the revised standards and thereafter no longer than 5 years
following the previous test. Requiring periodic performance tests would
serve as a check on the accuracy of facilities' mass balance
calculations and on the efficiency of the control devices used to
achieve compliance with the standards. Periodic performance tests would
ensure that control devices are properly maintained over time, thereby
reducing the potential for acute emissions episodes. We specifically
request comment on the proposed repeat testing requirements.
3. Electronic Reporting
Through this action, we are proposing that owners and operators of
cellulose products manufacturing facilities submit electronic copies of
required initial notifications, notifications of compliance status,
performance test reports, performance evaluation reports, and
semiannual reports through the EPA's Central Data Exchange (CDX) using
the Compliance and Emissions Data Reporting Interface (CEDRI). A
description of the electronic data submission process is provided in
the memorandum, Electronic Reporting Requirements for New Source
Performance Standards (NSPS) and National Emission Standards for
Hazardous Air Pollutants (NESHAP) Rules, available in Docket ID No.
EPA-HQ-OAR-2018-0415. The proposed rule requires that performance test
results collected using test methods that are supported by the EPA's
Electronic Reporting Tool (ERT) as listed on the ERT website \24\ at
the time of the test be submitted in the format generated through the
use of the ERT and that other performance test results be submitted in
portable document format (PDF) using the attachment module of the ERT.
Similarly, performance evaluation results of continuous monitoring
systems measuring relative accuracy test audit pollutants that are
supported by the ERT at the time of the test must be submitted in the
format generated through the use of the ERT and other performance
evaluation results be submitted in PDF using the attachment module of
the ERT.
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\24\ https://www.epa.gov/electronic-reporting-air-emissions/electronic-reporting-tool-ert.
---------------------------------------------------------------------------
For initial notifications and notifications of compliance status,
the proposed rule requires that owners and operators submit
notifications as PDFs to CEDRI. For semiannual reports, the proposed
rule requires that owners and operators use the appropriate spreadsheet
template to submit information to CEDRI. A draft version of the
proposed template for these reports is included in the docket for this
rulemaking.\25\ The EPA specifically requests comment on the content,
layout, and overall design of the template.
---------------------------------------------------------------------------
\25\ See Subpart_UUUU_Semiannual_Report.xlsx, available at
Docket ID No. EPA-HQ-OAR-2018-0415.
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The initial notifications, notifications of compliance status,
performance test reports, performance evaluation reports, and
semiannual reports are required to be submitted according to the
deadlines specified in 40 CFR 63.5580. Additionally, the EPA has
identified two broad circumstances in which electronic reporting
extensions may be provided. In both circumstances, the decision to
accept the claim of needing additional time to report is within the
discretion of the Administrator, and reporting should occur as soon as
possible. The EPA is providing these potential extensions to protect
owners and operators from noncompliance in cases where they cannot
successfully submit a report by the reporting deadline for reasons
outside of their control. The situation where an extension may be
warranted due to outages of the EPA's CDX or CEDRI which precludes an
owner or operator from accessing the system and submitting required
reports is addressed in 40 CFR 63.5580. The situation where an
extension may be warranted due to a force majeure event, which is
defined as an event that will be or has been caused by circumstances
beyond the control of the affected facility, its contractors, or any
entity controlled by the affected facility that prevents an owner or
operator from complying with the requirement to submit a report
electronically as required by this rule is addressed in 40 CFR 63.5580.
Examples of such events are acts of nature, acts of war or terrorism,
or equipment failure or safety hazards beyond the control of the
facility.
The electronic submittal of the reports addressed in this proposed
rulemaking will increase the usefulness of the data contained in those
reports, is in keeping with current trends in data availability and
transparency, will further assist in the protection of public health
and the environment, will improve compliance by facilitating the
ability of regulated facilities to demonstrate compliance with
requirements and by facilitating the ability of delegated state, local,
tribal, and territorial air agencies and the EPA to assess and
determine compliance, and will ultimately reduce burden on regulated
facilities, delegated air agencies, and the EPA. Electronic reporting
also eliminates paper-based, manual processes, thereby saving time and
resources, simplifying data entry, eliminating redundancies, minimizing
data reporting errors, and providing data quickly and accurately to the
affected facilities, air agencies, the EPA, and the public. Moreover,
electronic reporting is consistent with the EPA's plan \26\ to
implement Executive Order 13563 and is in keeping with the EPA's
Agency-wide policy \27\ developed in response to the White House's
Digital Government Strategy.\28\ For more information on the benefits
of electronic reporting, see the memorandum, Electronic Reporting
Requirements for New Source Performance Standards (NSPS) and National
Emission Standards for Hazardous Air Pollutants (NESHAP) Rules,
available in Docket ID No. EPA-HQ-OAR-2018-0415.
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\26\ EPA's Final Plan for Periodic Retrospective Reviews, August
2011. Available at: https://www.regulations.gov/document?D=EPA-HQ-OA-2011-0156-0154.
\27\ E-Reporting Policy Statement for EPA Regulations, September
2013. Available at: https://www.epa.gov/sites/production/files/2016-03/documents/epa-ereporting-policy-statement-2013-09-30.pdf.
\28\ Digital Government: Building a 21st Century Platform to
Better Serve the American People, May 2012. Available at: https://obamawhitehouse.archives.gov/sites/default/files/omb/egov/digital-government/digital-government.html.
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4. Biofilter Effluent Conductivity
On November 17, 2006, Viskase Companies, Inc., a company subject to
40 CFR part 63, subpart UUUU, which manufactures cellulose food
casings, submitted a request to the EPA to monitor biofilter effluent
conductivity as an alternative to effluent pH for the biofilter control
devices at their facilities in Osceola, Arkansas, and Loudon,
Tennessee. The request stated that pH is in a range such that effluent
conductivity would provide a more accurate operating limit:
[[Page 47371]]
For strong acids and bases, pH values are not very meaningful
indicators of the concentration. The measurement uncertainty is
large because pH is a logarithmic scale. Conductivity measurements
are more suitable than pH measurements for producing accurate and
reproducible estimates of the concentrations of free acids and bases
because the relationship between conductivity and concentration is
almost linear over a range of concentrations.
Based on the information provided by Viskase, the EPA conditionally
approved the monitoring request to establish and monitor an effluent
conductivity operating limit for the biofilter units and stated that
the effluent conductivity operating limit must be based on a
performance test and can be supplemented by engineering assessments
and/or manufacturer's recommendations.\29\
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\29\ See Technology Review for the Cellulose Products
Manufacturing Source Category--Proposed Rule, Appendix E, available
in the docket.
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In addition to granting the alternative monitoring request per 40
CFR 63.8(f), the EPA is also proposing an amendment to 40 CFR part 63,
subpart UUUU, to add biofilter effluent conductivity as an alternative
parameter to pH. Specifically, the EPA is proposing to revise the
operating limits table (Table 2 to Subpart UUUU of Part 63) to add
biofilter effluent conductivity to the list of biofilter operating
limits, revise the performance testing requirements in 40 CFR 63.5535
to add biofilter effluent conductivity to the list of parameters for
which operating limits must be established during the compliance
demonstration, and revise the continuous compliance with operating
limits table (Table 6 to Subpart UUUU of Part 63) to add biofilter
effluent conductivity to the list of parameters to monitor to
demonstrate continuous compliance.
5. IBR Under 1 CFR Part 51
The EPA is proposing regulatory text that includes IBR. In
accordance with requirements of 1 CFR 51.5, the EPA is proposing to
incorporate by reference the following documents into 40 CFR 63.14:
ASME PTC 19.10-1981, Flue and Exhaust Gas Analyses--Part
10, was previously approved for incorporation by reference for Table 4
to Subpart UUUU of Part 63.
ASTM D6420-99 (Reapproved 2010), Standard Test Method for
Determination of Gaseous Organic Compounds by Direct Interface Gas
Chromatography-Mass Spectrometry, IBR approved for Table 4 to Subpart
UUUU of Part 63.
ASTM D5790-95 (Reapproved 2012), Standard Test Method for
Measurement of Purgeable Organic Compounds in Water by Capillary Column
Gas Chromatography/Mass Spectrometry, IBR approved for Table 4 to
Subpart UUUU of Part 63.
ASTM D6348-12e1, Determination of Gaseous Compounds by
Extractive Direct Interface Fourier Transform Infrared (FTIR)
Spectroscopy, IBR approved for Table 4 to Subpart UUUU of Part 63.
The EPA has made, and will continue to make, these documents
generally available electronically through https://www.regulations.gov/
and at the appropriate EPA office (see the ADDRESSES section of this
preamble for more information).
6. Technical and Editorial Changes
The following lists additional proposed changes that address
technical and editorial corrections:
Revise the requirements in 40 CFR 63.5505 to clarify that
CS2 storage tanks part of a submerged unloading and storage operation
subject to 40 CFR part 63, subpart UUUU, is not subject to 40 CFR part
60, subpart Kb. These types of tanks are not the type of storage
vessels in terms of their physical siting and operational design that
were intended to be regulated under NSPS Kb, even when these tanks meet
the vapor pressure and designed capacity under the rule. These tanks
are completely submerged in a common water bath and have no air space
within the tanks due to the continuous water layer above the CS2 layer,
therefore, the tanks do not have direct CS2 gaseous emissions.
Revise the performance test requirements in 40 CFR 63.5535
to specify the conditions for conducting performance tests;
Revise the performance test requirements table (Table 4 to
Subpart UUUU of Part 63) to correct an error in the reference to a test
method appendix;
Revise the performance test requirements table (Table 4 to
Subpart UUUU of Part 63) to add IBR for ASTM D6420-99 (Reapproved
2010), ASTM D5790-95 (Reapproved 2012), and ASTM D6348-12e1;
Revise the reporting requirements in 40 CFR 63.5580 and
the reporting and recordkeeping requirements tables (Tables 8 and 9 to
Subpart UUUU of Part 63) to include the requirements to record and
report information on failures to meet the applicable standard and the
corrective actions taken; and
Revise the General Provisions applicability table (Table
10 to Subpart UUUU of Part 63) to align with those sections of the
General Provisions that have been amended or reserved over time.
E. What compliance dates are we proposing?
For the proposed rule revisions related to the removal of the
exemption from the requirements to meet the standard during SSM periods
and the additional electronic reporting requirements, the EPA is
proposing that existing affected sources must comply with the
amendments in this rulemaking no later than 180 days after the
effective date of the final rule. The EPA is also proposing that
affected sources that commence construction or reconstruction after
September 9, 2019 must comply with all requirements of the subpart,
including the amendments being proposed unless indicated specifically
otherwise, immediately upon startup. All affected existing facilities
would have to continue to meet the current requirements of 40 CFR part
63, subpart UUUU, until the applicable compliance date of the amended
rule. The final action is not expected to be a ``major rule'' as
defined by 5 U.S.C. 804(2), so the effective date of the final rule
will be the promulgation date as specified in CAA section 112(d)(10).
For existing sources, we are proposing two changes that would
impact ongoing compliance requirements for 40 CFR part 63, subpart
UUUU. As discussed elsewhere in this preamble, we are proposing to add
a requirement that initial notifications, notifications of compliance
status, performance test results, and the semiannual reports using the
new template be submitted electronically. We are also proposing to
change the requirements for SSM by removing the exemption from the
requirements to meet the standard during SSM periods and by removing
the requirement to develop and implement an SSM plan.
Our experience with similar industries that are required to convert
reporting mechanisms, install necessary hardware, install necessary
software, become familiar with the process of submitting performance
test results electronically through the EPA's CEDRI, test these new
electronic submission capabilities, reliably employ electronic
reporting, and convert logistics of reporting processes to different
time-reporting parameters, shows that a time period of a minimum of 90
days, and more typically 180 days, is generally necessary to
successfully complete these changes. Our experience with similar
industries further shows that this sort of regulated facility generally
requires a time period of 180 days to read and
[[Page 47372]]
understand the amended rule requirements; evaluate their operations to
ensure that they can meet the standards during periods of startup and
shutdown as defined in the rule and make any necessary adjustments;
adjust parameter monitoring and recording systems to accommodate
revisions; and update their operations to reflect the revised
requirements. The EPA recognizes the confusion that multiple different
compliance dates for individual requirements would create and the
additional burden such an assortment of dates would impose. From our
assessment of the timeframe needed for compliance with the entirety of
the revised requirements, the EPA considers a period of 180 days to be
the most expeditious compliance period practicable, and, thus, is
proposing that existing affected sources be in compliance with all of
this regulation's revised requirements within 180 days of the
regulation's effective date. We solicit comment on this proposed
compliance period, and we specifically request submission of
information from sources in this source category regarding specific
actions that would need to be undertaken to comply with the proposed
amended requirements and the time needed to make the adjustments for
compliance with any of the revised requirements. We note that
information provided may result in changes to the proposed compliance
date.
Additionally, we are also proposing new requirements to conduct
periodic performance testing every 5 years. Establishing a compliance
date earlier than 3 years for the first periodic performance test can
cause scheduling issues as affected sources compete for a limited
number of testing contractors. Considering these scheduling issues, we
are proposing that each existing affected source, and each new and
reconstructed affected source that commences construction or
reconstruction after August 28, 2000, and on or before September 9,
2019 and uses a non-recovery control device to comply with the
standards, must conduct the first periodic performance test on or
before [DATE 3 YEARS AFTER DATE OF PUBLICATION OF FINAL RULE IN THE
Federal Register] and conduct subsequent periodic performance tests no
later than 60 months thereafter following the previous performance
test. For each new and reconstructed affected source that commences
construction or reconstruction after September 9, 2019 and uses a non-
recovery control device to comply with the standards, we are proposing
that owners and operators must conduct the first periodic performance
test no later than 60 months following the initial performance test
required by 40 CFR 63.5535 and conduct subsequent periodic performance
tests no later than 60 months thereafter following the previous
performance test.
V. Summary of Cost, Environmental, and Economic Impacts
A. What are the affected sources?
There are currently eight facilities operating in the United States
that conduct MVP and CEP operations that are subject to the Cellulose
Products Manufacturing NESHAP. The 40 CFR part 63, subpart UUUU
affected source for the MVP source category is each cellulose food
casing, rayon, cellulosic sponge, or cellophane operation, as defined
in 40 CFR 63.5610. The affected source for the CEP source category is
each cellulose ether operation, as defined in 40 CFR 63.5610.
B. What are the air quality impacts?
The EPA estimates that annual HAP emissions from the MVP and CEP
facilities that are subject to the NESHAP are approximately 4,300 tpy.
Because we are not proposing revisions to the emission limits, we do
not anticipate any quantifiable air quality impacts as a result of the
proposed amendments. However, we anticipate that the proposed
requirements, including the removal of the SSM exemption and addition
of periodic emissions testing, may reduce emissions by ensuring proper
operation of control devices.
C. What are the cost impacts?
The eight facilities that would be subject to the proposed
amendments would incur minimal net costs to meet revised recordkeeping
and reporting requirements and would incur periodic emissions testing
costs for add-on control devices. The nationwide costs associated with
the proposed periodic testing requirements are estimated to be $490,000
(2018$) over the 5 years following promulgation of the amendments. For
further information on the requirement being proposed, see section
IV.D.2 of this preamble. For further information on the costs
associated with the proposed requirements, see the memorandum, Costs
and Environmental Impacts of Regulatory Options for the Cellulose
Products Manufacturing Industry--Proposed Rule, and the document,
Supporting Statement for the NESHAP for Cellulose Products
Manufacturing (40 CFR part 63, subpart UUUU), which are both available
in the docket for this action. We solicit comment on these estimated
cost impacts.
D. What are the economic impacts?
Economic impact analyses focus on changes in market prices and
output levels. If changes in market prices and output levels in the
primary markets are significant enough, impacts on other markets may
also be examined. Both the magnitude of costs associated with the
proposed requirements and the distribution of these costs among
affected facilities can have a role in determining how the market will
change in response to a proposed rule. Based on the costs associated
with the periodic testing requirements, no significant economic impacts
from the proposed amendments are anticipated.
E. What are the benefits?
Although the EPA does not anticipate reductions in HAP emissions as
a result of the proposed amendments, we believe that the action, if
finalized as proposed, would result in improvements to the rule.
Specifically, the proposed amendments revise the standards such that
they apply at all times. Additionally, the proposed amendments
requiring electronic submittal of initial notifications, performance
test results, and semiannual reports will increase the usefulness of
the data, is in keeping with current trends of data availability, will
further assist in the protection of public health and the environment,
and will ultimately result in less burden on the regulated community.
See section IV.D.3 of this preamble for more information.
VI. Request for Comments
We solicit comments on this proposed action. In addition to general
comments on this proposed action, we are also interested in additional
data that may improve the risk assessments and other analyses. We are
specifically interested in receiving any improvements to the data used
in the site-specific emissions profiles used for risk modeling. Such
data should include supporting documentation in sufficient detail to
allow characterization of the quality and representativeness of the
data or information. Section VII of this preamble provides more
information on submitting data.
VII. Submitting Data Corrections
The site-specific emissions profiles used in the source category
risk and demographic analyses and instructions are available for
download on the RTR website at https://www.epa.gov/stationary-sources-
air-pollution/
[[Page 47373]]
cellulose-products-manufacturing-national-emission-standards. The data
files include detailed information for each HAP emissions release point
for the facilities in the source category.
If you believe that the data are not representative or are
inaccurate, please identify the data in question, provide your reason
for concern, and provide any ``improved'' data that you have, if
available. When you submit data, we request that you provide
documentation of the basis for the revised values to support your
suggested changes. To submit comments on the data downloaded from the
RTR website, complete the following steps:
1. Within this downloaded file, enter suggested revisions to the
data fields appropriate for that information.
2. Fill in the commenter information fields for each suggested
revision (i.e., commenter name, commenter organization, commenter email
address, commenter phone number, and revision comments).
3. Gather documentation for any suggested emissions revisions
(e.g., performance test reports, material balance calculations).
4. Send the entire downloaded file with suggested revisions in
Microsoft[supreg] Access format and all accompanying documentation to
Docket ID No. EPA-HQ-OAR-2018-0415 (through the method described in the
ADDRESSES section of this preamble).
5. If you are providing comments on a single facility or multiple
facilities, you need only submit one file for all facilities. The file
should contain all suggested changes for all sources at that facility
(or facilities). We request that all data revision comments be
submitted in the form of updated Microsoft[supreg] Excel files that are
generated by the Microsoft[supreg] Access file. These files are
provided on the RTR website at https://www.epa.gov/stationary-sources-air-pollution/cellulose-products-manufacturing-national-emission-standards.
VIII. Statutory and Executive Order Reviews
Additional information about these statutes and Executive Orders
can be found at https://www.epa.gov/laws-regulations/laws-and-executive-orders.
A. Executive Order 12866: Regulatory Planning and Review and Executive
Order 13563: Improving Regulation and Regulatory Review
This action is not a significant regulatory action and was,
therefore, not submitted to OMB for review.
B. Executive Order 13771: Reducing Regulation and Controlling
Regulatory Costs
This action is not expected to be an Executive Order 13771
regulatory action because this action is not significant under
Executive Order 12866.
C. Paperwork Reduction Act (PRA)
The information collection activities in this proposed rule have
been submitted for approval to OMB under the PRA. The Information
Collection Request (ICR) document that the EPA prepared has been
assigned EPA ICR number 1974.09. You can find a copy of the ICR in the
docket for this rule, and it is briefly summarized here.
The information requirements are based on notification,
recordkeeping, and reporting requirements in the NESHAP General
Provisions (40 CFR part 63, subpart A), which are essential in
determining compliance and mandatory for all operators subject to
national emissions standards. These recordkeeping and reporting
requirements are specifically authorized by CAA section 114 (42 U.S.C.
7414). All information submitted to the EPA pursuant to the
recordkeeping and reporting requirements for which a claim of
confidentiality is made is safeguarded according to Agency policies set
forth in 40 CFR part 2, subpart B.
We are proposing changes to the paperwork requirements for 40 CFR
part 63, subpart UUUU, in the form of eliminating the SSM reporting and
SSM plan requirements, adding periodic emissions testing, providing
biofilter effluent conductivity as an alternative to monitoring pH, and
requiring electronic submittal of notifications, semiannual reports,
and performance test reports.
Respondents/affected entities: Respondents include facilities
subject to the NESHAP for Cellulose Products Manufacturing (40 CFR part
63, subpart UUUU).
Respondent's obligation to respond: Mandatory (40 CFR part 63,
subpart UUUU).
Estimated number of respondents: Eight.
Frequency of response: The frequency of responses varies depending
on the burden item. Responses include initial notifications, reports of
periodic performance tests, and semiannual compliance reports.
Total estimated burden: The annual recordkeeping and reporting
burden for this information collection, averaged over the first 3 years
of this ICR, is estimated to total 7,256 labor hours (per year). Burden
is defined at 5 CFR 1320.3(b).
Total estimated cost: $954,000 per year, including $834,000 per
year in labor costs and $120,000 per year in annualized capital or
operation and maintenance costs.
An agency may not conduct or sponsor, and a person is not required
to respond to, a collection of information unless it displays a
currently valid OMB control number. The OMB control numbers for the
EPA's regulations in 40 CFR are listed in 40 CFR part 9.
Submit your comments on the Agency's need for this information, the
accuracy of the provided burden estimates, and any suggested methods
for minimizing respondent burden to the EPA using the docket identified
at the beginning of this rule. You may also send your ICR-related
comments to OMB's Office of Information and Regulatory Affairs via
email to [email protected], Attention: Desk Officer for the
EPA. Since OMB is required to make a decision concerning the ICR
between 30 and 60 days after receipt, OMB must receive comments no
later than October 9, 2019. The EPA will respond to any ICR-related
comments in the final rule.
D. Regulatory Flexibility Act (RFA)
I certify that this action will not have a significant economic
impact on a substantial number of small entities under the RFA. No
small entities are subject to the requirements of this rule. As such,
this action will not impose any requirements on small entities.
E. Unfunded Mandates Reform Act (UMRA)
This action does not contain an unfunded mandate of $100 million or
more as described in UMRA, 2 U.S.C. 1531-1538, and does not
significantly or uniquely affect small governments. The action imposes
no enforceable duty on any state, local, or tribal governments or the
private sector.
F. Executive Order 13132: Federalism
This action does not have federalism implications. It will not have
substantial direct effects on the states, on the relationship between
the national government and the states, or on the distribution of power
and responsibilities among the various levels of government.
G. Executive Order 13175: Consultation and Coordination With Indian
Tribal Governments
This action does not have tribal implications as specified in
Executive Order 13175. It will not have substantial direct effects on
tribal governments, on the relationship between the federal
[[Page 47374]]
government and Indian tribes, or on the distribution of power and
responsibilities between the federal government and Indian tribes. No
tribal governments own facilities subject to the NESHAP. Thus,
Executive Order 13175 does not apply to this action.
H. Executive Order 13045: Protection of Children From Environmental
Health Risks and Safety Risks
This action is not subject to Executive Order 13045 because it is
not economically significant as defined in Executive Order 12866, and
because the EPA does not believe the environmental health or safety
risks addressed by this action present a disproportionate risk to
children. This action's health and risk assessments are contained in
sections III and IV of this preamble and further documented in the
following risk reports titled Residual Risk Assessment for the
Miscellaneous Viscose Processes Source Category in Support of the 2019
Risk and Technology Review Proposed Rule and Residual Risk Assessment
for the Cellulose Ethers Production Source Category in Support of the
2019 Risk and Technology Review Proposed Rule, which can be found in
the docket for this action.
I. Executive Order 13211: Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution, or Use
This action is not subject to Executive Order 13211, because it is
not a significant regulatory action under Executive Order 12866.
J. National Technology Transfer and Advancement Act (NTTAA) and 1 CFR
Part 51
This action involves technical standards. The EPA proposes to use
ASTM D6420-99 (Reapproved 2010), ``Standard Test Method for
Determination of Gaseous Organic Compounds by Direct Interface Gas
Chromatography-Mass Spectrometry,'' for the measurement of toluene and
total organic HAP. This method employs a direct interface gas
chromatograph/mass spectrometer to identify and quantify the 36
volatile organic compounds (or sub-set of these compounds) listed on
the ASTM website. This ASTM has been approved by the EPA as an
alternative to EPA Method 18 only when the target compounds are all
known and the target compounds are all listed in ASTM D6420 as
measurable. This ASTM should not be used for methane and ethane because
their atomic mass is less than 35. ASTM D6420 should never be specified
as a total VOC method.
The EPA also proposes to use ASTM D5790-95 (Reapproved 2012),
``Standard Test Method for Measurement of Purgeable Organic Compounds
in Water by Capillary Column Gas Chromatography/Mass Spectrometry.''
This method covers the identification and simultaneous measurement of
purgeable volatile organic compounds. It has been validated for treated
drinking water, wastewater, and groundwater. ASTM D5790-95 is
acceptable as an alternative to EPA Method 624 and for the analysis of
total organic HAP in wastewater samples. For wastewater analyses, this
ASTM method should be used with the sampling procedures of EPA Method
25D or an equivalent method in order to be a complete alternative. The
ASTM standard is validated for all of the 21 volatile organic HAP
(including toluene) targeted by EPA Method 624, but it is also
validated for an additional 14 HAP not targeted by the EPA method.
The EPA proposes to use ASTM D6348-12e1, ``Determination of Gaseous
Compounds by Extractive Direct Interface Fourier Transform Infrared
(FTIR) Spectroscopy'' as an acceptable alternative to using EPA Method
320 with caveats requiring inclusion of selected annexes to the
standard as mandatory. This test method provides the volume
concentration of detected analytes. Converting the volume concentration
to a mass emission rate using a particular compound's molecular weight,
and the effluent volumetric flow rate, temperature, and pressure is
useful for determining the impact of that compound to the atmosphere.
When using ASTM D6348-12e, the following conditions must be met: (1)
The test plan preparation and implementation in the Annexes to ASTM D
6348-03, Sections A1 through A8 are mandatory; and (2) in ASTM D6348-
03, Annex A5 (Analyte Spiking Technique), the percent recovery (%R)
must be determined for each target analyte (Equation A5.5). In order
for the test data to be acceptable for a compound, %R must be greater
than or equal to 70 percent and less than or equal to 130 percent. If
the %R value does not meet this criterion for a target compound, the
test data are not acceptable for that compound and the test must be
repeated for that analyte (i.e., the sampling and/or analytical
procedure should be adjusted before a retest). The %R value for each
compound must be reported in the test report, and all field
measurements must be corrected with the calculated %R value for that
compound by using the following equation: Reported Results = ((Measured
Concentration in the Stack))/(%R) x 100.
The ASTM standards are reasonably available from the American
Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, Post
Office Box C700, West Conshohocken, PA 19428-2959. See https://www.astm.org/.
While the EPA has identified another 14 voluntary consensus
standards (VCS) as being potentially applicable to this proposed rule,
we have decided not to use these VCS in this rulemaking. The use of
these VCS would not be practical due to lack of equivalency,
documentation, validation date, and other important technical and
policy considerations. See the memorandum titled Voluntary Consensus
Standard Results for National Emission Standards for Hazardous Air
Pollutants for Cellulose Products Manufacturing, in the docket for this
proposed rule for the reasons for these determinations.
Under 40 CFR 63.7(f) and 40 CFR 63.8(f) of subpart A of the General
Provisions, a source may apply to the EPA for permission to use
alternative test methods or alternative monitoring requirements in
place of any required testing methods, performance specifications, or
procedures in the final rule or any amendments.
The EPA welcomes comments on this aspect of the proposed rulemaking
and, specifically, invites the public to identify potentially
applicable VCS and to explain why such standards should be used in this
regulation.
K. Executive Order 12898: Federal Actions To Address Environmental
Justice in Minority Populations and Low-Income Populations
The EPA believes that this action does not have disproportionately
high and adverse human health or environmental effects on minority
populations, low-income populations, and/or indigenous peoples, as
specified in Executive Order 12898 (59 FR 7629, February 16, 1994).
The documentation for this decision is contained in section IV.A.3
of this preamble and the technical reports titled Risk and Technology
Review--Analysis of Demographic Factors for Populations Living Near
Miscellaneous Viscose Processes Facilities and Risk and Technology
Review--Analysis of Demographic Factors for Populations Living Near
Cellulose Ethers Production Facilities, which are located in the public
docket for this action.
List of Subjects in 40 CFR Part 63
Environmental protection, Administrative practice and procedure,
Air pollution control, Hazardous substances, Incorporation by
reference,
[[Page 47375]]
Intergovernmental relations, Reporting and recordkeeping requirements.
Andrew R. Wheeler,
Administrator.
For the reasons set forth in the preamble, the EPA proposes to
amend 40 CFR part 63 as follows:
PART 63--NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
FOR SOURCE CATEGORIES
0
1. The authority citation for part 63 continues to read as follows:
Authority: 42 U.S.C. 7401 et seq.
Subpart A--[Amended]
0
2. Section 63.14 is amended by revising paragraphs (h)(72), (85), (89),
and (91) to read as follows:
Sec. 63.14 Incorporations by reference.
* * * * *
(h) * * *
(72) ASTM D5790-95 (Reapproved 2012), Standard Test Method for
Measurement of Purgeable Organic Compounds in Water by Capillary Column
Gas Chromatography/Mass Spectrometry, IBR approved for Table 4 to
subpart UUUU.
* * * * *
(85) ASTM D6348-12e1, Determination of Gaseous Compounds by
Extractive Direct Interface Fourier Transform Infrared (FTIR)
Spectroscopy, Approved February 1, 2012, IBR approved for Sec.
63.1571(a) and Table 4 to subpart UUUU.
* * * * *
(89) ASTM D6420-99, Standard Test Method for Determination of
Gaseous Organic Compounds by Direct Interface Gas Chromatography-Mass
Spectrometry, IBR approved for Sec. Sec. 63.5799 and 63.5850.
* * * * *
(91) ASTM D6420-99 (Reapproved 2010), Standard Test Method for
Determination of Gaseous Organic Compounds by Direct Interface Gas
Chromatography-Mass Spectrometry, Approved October 1, 2010, IBR
approved for Sec. 63.670(j), Table 4 to subpart UUUU, and appendix A
to this part: Method 325B.
* * * * *
Subpart UUUU--[Amended]
0
3. Section 63.5505 is amended by adding paragraph (f) to read as
follows:
Sec. 63.5505 What emission limits, operating limits, and work
practice standards must I meet?
* * * * *
(f) Carbon disulfide storage tanks part of a submerged unloading
and storage operation subject to this part are not subject to 40 CFR
part 60, subpart Kb (Standards of Performance for Volatile Organic
Liquid Storage Vessels (Including Petroleum Liquid Storage Vessels) for
Which Construction, Reconstruction, or Modification Commenced After
July 23, 1984).
0
4. Section 63.5515 is amended by revising paragraph (a), paragraph (b)
introductory text, adding and reserving paragraph (b)(2), and revising
paragraph (c) to read as follows:
Sec. 63.5515 What are my general requirements for complying with
this subpart?
(a) Before [DATE 181 DAYS AFTER PUBLICATION OF FINAL RULE IN THE
Federal Register], for each existing source, and for each new or
reconstructed source for which construction or reconstruction commenced
after June 11, 2002, but on or before September 9, 2019, you must be in
compliance with the emission limits, operating limits, and work
practice standards in this subpart at all times, except during periods
of startup, shutdown, and malfunction. After [DATE 180 DAYS AFTER
PUBLICATION OF FINAL RULE IN THE Federal Register], for each such
source you must be in compliance with the emission limitations in this
subpart at all times. For new and reconstructed sources for which
construction or reconstruction commenced after September 9, 2019, you
must be in compliance with the emission limits, operating limits, and
work practice standards in this subpart at all times.
(b) Before [DATE 181 DAYS AFTER PUBLICATION OF FINAL RULE IN THE
Federal Register], for each existing source, and for each new or
reconstructed source for which construction or reconstruction commenced
after June 11, 2002, but on or before September 9, 2019, you must
always operate and maintain your affected source, including air
pollution control and monitoring equipment, according to the provisions
in Sec. 63.6(e)(1)(i). After [DATE 180 DAYS AFTER PUBLICATION OF FINAL
RULE IN THE Federal Register] for each such source, and after September
9, 2019 for new and reconstructed sources for which construction or
reconstruction commenced after September 9, 2019, you must always
operate and maintain your affected source, including air pollution
control and monitoring equipment in a manner consistent with good air
pollution control practices for minimizing emissions at least to the
levels required by this subpart. The general duty to minimize emissions
does not require you to make any further efforts to reduce emissions if
levels required by the applicable standard have been achieved.
Determination of whether a source is operating in compliance with
operation and maintenance requirements will be based on information
available to the Administrator which may include, but is not limited
to, monitoring results, review of operation and maintenance procedures,
review of operation and maintenance records, and inspection of the
source.
* * * * *
(c) Before [DATE 181 DAYS AFTER PUBLICATION OF FINAL RULE IN THE
Federal Register], for each existing source, and for each new or
reconstructed source for which construction or reconstruction commenced
after June 11, 2002, but on or before September 9, 2019, you must
maintain a written startup, shutdown, and malfunction (SSM) plan
according the provisions in Sec. 63.6(e)(3). For each such source, a
startup, shutdown, and malfunction plan is not required after [DATE 180
DAYS AFTER PUBLICATION OF FINAL RULE IN THE Federal Register]. No
startup, shutdown, and malfunction plan is required for any new or
reconstruction source for which construction or reconstruction
commenced after September 9, 2019.
* * * * *
0
5. Section 63.5535 is amended by revising paragraph (b), removing and
reserving paragraph (c), revising paragraphs (g)(1), (h)(1), and (i)(7)
to read as follows:
Sec. 63.5535 What performance tests and other procedures must I use?
* * * * *
(b) You must conduct each performance test for continuous process
vents and combinations of batch and continuous process vents based on
representative performance (i.e., performance based on normal operating
conditions) of the affected source for the period being tested,
according to the specific conditions in Table 4 to this Subpart UUUU.
Representative conditions exclude periods of startup and shutdown. You
may not conduct performance tests during periods of malfunction. You
must record the process information that is necessary to document
operating conditions during the test and include in such record an
explanation to support that such conditions represent normal operation.
Upon request, you shall make available to the Administrator such
records as
[[Page 47376]]
may be necessary to determine the conditions of performance tests.
* * * * *
(g) * * *
(1) Viscose process affected sources that must use non-recovery
control devices to meet the applicable emission limit in table 1 to
this subpart must conduct an initial performance test of their non-
recovery control devices according to the requirements in table 4 to
this subpart to determine the control efficiency of their non-recovery
control devices and incorporate this information in their material
balance. Periodic performance tests must be conducted as specified in
Sec. 63.5541.
* * * * *
(h) * * *
(1) Cellulose ether affected sources that must use non-recovery
control devices to meet the applicable emission limit in table 1 to
this subpart must conduct an initial performance test of their non-
recovery control devices according to the requirements in table 4 to
this subpart to determine the control efficiency of their non-recovery
control devices and incorporate this information in their material
balance. Periodic performance tests must be conducted as specified in
Sec. 63.5541.
* * * * *
(i) * * *
(7) For biofilters, record the pressure drop across the biofilter
beds, inlet gas temperature, and effluent pH or conductivity averaged
over the same time period as the compliance demonstration while the
vent stream is routed and constituted normally. Locate the pressure,
temperature, and pH or conductivity sensors in positions that provide
representative measurement of these parameters. Ensure the sample is
properly mixed and representative of the fluid to be measured.
* * * * *
0
6. Section 63.5541 is added to read as follows:
Sec. 63.5541 When must I conduct subsequent performance tests?
(a) For each affected source utilizing a non-recovery control
device to comply with Sec. 63.5515 constructed or reconstructed before
September 9, 2019, a periodic performance test must be performed by
[DATE 3 YEARS AFTER DATE OF PUBLICATION IN THE Federal Register], and
subsequent tests no later than 60 months thereafter.
(b) For each affected source utilizing a non-recovery control
device to comply with Sec. 63.5515 that commences construction or
reconstruction after September 9, 2019, a periodic performance test
must be performed no later than 60 months after the initial performance
test required by Sec. 63.5535, and subsequent tests no later than 60
months thereafter.
0
7. Section 63.5545 is amended by revising paragraphs (b)(1) and (e)(2)
to read as follows:
Sec. 63.5545 What are my monitoring installation, operation, and
maintenance requirements?
* * * * *
(b) * * *
(1) Ongoing operation and maintenance procedures in accordance with
the general requirements of Sec. Sec. 63.8(c)(3) and (4)(ii), and
63.5515(b), and 63.5580(c)(6);
* * * * *
(e) * * *
(2) You must conduct a performance evaluation of each CEMS
according to the requirements in Sec. 63.8, Procedure 1 of 40 CFR part
60, appendix F, and according to the applicable performance
specification listed in paragraphs (e)(1)(i) through (iv) of this
section.
* * * * *
0
8. Section 63.5555 is amended by revising paragraph (d) to read as
follows:
Sec. 63.5555 How do I demonstrate continuous compliance with the
emission limits, operating limits, and work practice standards?
* * * * *
(d) Deviations that occur during a period of startup, shutdown, or
malfunction are not violations if you demonstrate to the
Administrator's satisfaction that you were operating in accordance with
Sec. 63.5515(b). The Administrator will determine whether deviations
that occur during a period you identify as a startup, shutdown, or
malfunction are violations, according to the provisions in Sec.
63.5515(b).
0
9. Section 63.5575 is revised to read as follows:
Sec. 63.5575 What notifications must I submit and when?
You must submit each notification in Table 7 to this subpart that
applies to you by the date specified in Table 7 to this subpart.
Initial notifications and Notification of Compliance Status Reports
shall be electronically submitted in portable document format (PDF)
following the procedure specified in Sec. 63.5580(g).
0
10. Section 63.5580 is amended by:
0
a. Revising paragraph (b) introductory text;
0
b. Adding paragraph (b)(6);
0
c. Revising paragraph (c)(4);
0
d. Revising paragraph (e) introductory text and paragraph (e)(2);
0
e. Adding paragraph (e)(14); and
0
f. Adding paragraphs (g) through (k).
The revisions and additions read as follows:
Sec. 63.5580 What reports must I submit and when?
* * * * *
(b) Unless the Administrator has approved a different schedule for
submitting reports under Sec. 63.10, you must submit each compliance
report by the date in Table 8 to this subpart and according to the
requirements in paragraphs (b)(1) through (6) of this section.
* * * * *
(6) Beginning on [DATE 180 DAYS AFTER DATE OF PUBLICATION OF FINAL
RULE IN THE Federal Register], submit all subsequent reports following
the procedure specified in paragraph (g) of this section.
* * * * *
(c) * * *
(4) Before [DATE 181 DAYS AFTER PUBLICATION OF FINAL RULE IN THE
Federal Register], for each existing source, and for each new or
reconstructed source for which construction or reconstruction commenced
after June 11, 2002, but on or before September 9, 2019, if you had a
startup, shutdown, or malfunction during the reporting period and you
took actions consistent with your startup, shutdown, and malfunction
plan, the compliance report must include the information in Sec.
63.10(d)(5)(i). No startup, shutdown, and malfunction plan is required
for any new or reconstruction source for which construction or
reconstruction commenced after September 9, 2019. After [DATE 180 DAYS
AFTER PUBLICATION OF FINAL RULE IN THE Federal Register], this section
is no longer relevant.
* * * * *
(e) For each deviation from an emission limit or operating limit
occurring at an affected source where you are using a CMS to
demonstrate continuous compliance with the emission limit or operating
limit in this subpart (see Tables 5 and 6 to this subpart), you must
include the information in paragraphs (c)(1) through (4) and (e)(1)
through (14) of this section. This includes periods of startup,
shutdown, and malfunction.
* * * * *
(2) The date, time, and duration that each CMS was inoperative,
except for zero (low-level) and high-level checks.
* * * * *
(14) An estimate of the quantity of each regulated pollutant
emitted over
[[Page 47377]]
any emission limit, and a description of the method used to estimate
the emissions.
* * * * *
(g) Submitting notifications or reports electronically. If you are
required to submit notifications or reports following the procedure
specified in this paragraph, you must submit notifications or reports
to the EPA via the Compliance and Emissions Data Reporting Interface
(CEDRI), which can be accessed through the EPA's Central Data Exchange
(CDX) (https://cdx.epa.gov/). Notifications must be submitted as PDFs
to CEDRI. You must use the semi-annual compliance report template on
the CEDRI website (https://www.epa.gov/electronic-reporting-air-emissions/compliance-and-emissions-data-reporting-interface-cedri) for
this subpart. The date report templates become available will be listed
on the CEDRI website. The semi-annual compliance report must be
submitted by the deadline specified in this subpart, regardless of the
method in which the report is submitted. If you claim some of the
information required to be submitted via CEDRI is confidential business
information (CBI), submit a complete report, including information
claimed to be CBI, to the EPA. The report must be generated using the
appropriate form on the CEDRI website. Submit the file on a compact
disc, flash drive, or other commonly used electronic storage medium and
clearly mark the medium as CBI. Mail the electronic medium to U.S. EPA/
OAQPS/CORE CBI Office, Attention: Group Leader, Measurement Policy
Group, MD C404-02, 4930 Old Page Rd., Durham, NC 27703. The same file
with the CBI omitted must be submitted to EPA via EPA's CDX as
described earlier in this paragraph.
(h) Performance tests. Within 60 days after the date of completing
each performance test required by this subpart, you must submit the
results of the performance test following the procedures specified in
paragraphs (h)(1) through (3) of this section.
(1) Data collected using test methods supported by the EPA's
Electronic Reporting Tool (ERT) as listed on the EPA's ERT website
(https://www.epa.gov/electronic-reporting-air-emissions/electronic-reporting-tool-ert) at the time of the test. Submit the results of the
performance test to the EPA via CEDRI, which can be accessed through
the EPA's CDX (https://cdx.epa.gov/). The data must be submitted in a
file format generated through the use of the EPA's ERT. Alternatively,
you may submit an electronic file consistent with the extensible markup
language (XML) schema listed on the EPA's ERT website.
(2) Data collected using test methods that are not supported by
EPA's ERT as listed on the EPA's ERT website at the time of the test.
The results of the performance test must be included as an attachment
in the ERT or an alternate electronic file consistent with the XML
schema listed on the EPA's ERT website. Submit the ERT generated
package or alternative file to the EPA via CEDRI.
(3) Confidential business information (CBI). If you claim some of
the information submitted under paragraph (h) of this section is CBI,
you must submit a complete file, including information claimed to be
CBI, to the EPA. The file must be generated through the use of the
EPA's ERT or an alternate electronic file consistent with the XML
schema listed on the EPA's ERT website. Submit the file on a compact
disc, flash drive, or other commonly used electronic storage medium and
clearly mark the medium as CBI. Mail the electronic medium to U.S. EPA/
OAQPS/CORE CBI Office, Attention: Group Leader, Measurement Policy
Group, MD C404-02, 4930 Old Page Rd., Durham, NC 27703. The same file
with the CBI omitted must be submitted to EPA via EPA's CDX as
described in paragraph (h) of this section.
(i) Performance evaluations. Within 60 days after the date of
completing each continuous monitoring system (CMS) performance
evaluation (as defined in Sec. 63.2), you must submit the results of
the performance evaluation following the procedures specified in
paragraphs (i)(1) through (3) of this section.
(1) Performance evaluations of CMS measuring relative accuracy test
audit (RATA) pollutants that are supported by the EPA's ERT as listed
on the EPA's ERT website at the time of the evaluation. Submit the
results of the performance evaluation to the EPA via CEDRI, which can
be accessed through the EPA's CDX. The data must be submitted in a file
format generated through the use of the EPA's ERT. Alternatively, you
may submit an electronic file consistent with the XML schema listed on
the EPA's ERT website.
(2) Performance evaluations of CMS measuring RATA pollutants that
are not supported by the EPA's ERT as listed on the EPA's ERT website
at the time of the evaluation. The results of the performance
evaluation must be included as an attachment in the ERT or an alternate
electronic file consistent with the XML schema listed on the EPA's ERT
website. Submit the ERT generated package or alternative file to the
EPA via CEDRI.
(3) Confidential business information (CBI). If you claim some of
the information submitted under this paragraph (i) is CBI, you must
submit a complete file, including information claimed to be CBI, to the
EPA. The file must be generated through the use of the EPA's ERT or an
alternate electronic file consistent with the XML schema listed on the
EPA's ERT website. Submit the file on a compact disc, flash drive, or
other commonly used electronic storage medium and clearly mark the
medium as CBI. Mail the electronic medium to U.S. EPA/OAQPS/CORE CBI
Office, Attention: Group Leader, Measurement Policy Group, MD C404-02,
4930 Old Page Rd., Durham, NC 27703. The same file with the CBI omitted
must be submitted to the EPA via the EPA's CDX as described in this
paragraph (i).
(j) Claims of EPA system outage. If you are required to
electronically submit a report or notification through CEDRI in the
EPA's CDX, you may assert a claim of EPA system outage for failure to
timely comply with the reporting requirement. To assert a claim of EPA
system outage, you must meet the requirements outlined in paragraphs
(j)(1) through (7) of this section.
(1) You must have been or will be precluded from accessing CEDRI
and submitting a required report within the time prescribed due to an
outage of either the EPA's CEDRI or CDX systems.
(2) The outage must have occurred within the period of time
beginning 5 business days prior to the date that the submission is due.
(3) The outage may be planned or unplanned.
(4) You must submit notification to the Administrator in writing as
soon as possible following the date you first knew, or through due
diligence should have known, that the event may cause or has caused a
delay in reporting.
(5) You must provide to the Administrator a written description
identifying:
(i) The date(s) and time(s) when CDX or CEDRI was accessed and the
system was unavailable;
(ii) A rationale for attributing the delay in reporting beyond the
regulatory deadline to EPA system outage;
(iii) Measures taken or to be taken to minimize the delay in
reporting; and
(iv) The date by which you propose to report, or if you have
already met the reporting requirement at the time of the notification,
the date you reported.
(6) The decision to accept the claim of EPA system outage and allow
an extension to the reporting deadline is
[[Page 47378]]
solely within the discretion of the Administrator.
(7) In any circumstance, the report must be submitted
electronically as soon as possible after the outage is resolved.
(k) Claims of force majeure. If you are required to electronically
submit a report through CEDRI in the EPA's CDX, you may assert a claim
of force majeure for failure to timely comply with the reporting
requirement. To assert a claim of force majuere, you must meet the
requirements outlined in paragraphs (k)(1) through (5) of this section.
(1) You may submit a claim if a force majeure event is about to
occur, occurs, or has occurred or there are lingering effects from such
an event within the period of time beginning five business days prior
to the date the submission is due. For the purposes of this section, a
force majeure event is defined as an event that will be or has been
caused by circumstances beyond the control of the affected facility,
its contractors, or any entity controlled by the affected facility that
prevents you from complying with the requirement to submit a report
electronically within the time period prescribed. Examples of such
events are acts of nature (e.g., hurricanes, earthquakes, or floods),
acts of war or terrorism, or equipment failure or safety hazard beyond
the control of the affected facility (e.g., large scale power outage).
(2) You must submit notification to the Administrator in writing as
soon as possible following the date you first knew, or through due
diligence should have known, that the event may cause or has caused a
delay in reporting.
(3) You must provide to the Administrator:
(i) A written description of the force majeure event;
(ii) A rationale for attributing the delay in reporting beyond the
regulatory deadline to the force majeure event;
(iii) Measures taken or to be taken to minimize the delay in
reporting; and
(iv) The date by which you propose to report, or if you have
already met the reporting requirement at the time of the notification,
the date you reported.
(4) The decision to accept the claim of force majeure and allow an
extension to the reporting deadline is solely within the discretion of
the Administrator.
(5) In any circumstance, the reporting must occur as soon as
possible after the force majeure event occurs.
0
11. Section 63.5590 is amended by adding paragraph (e) to read as
follows:
Sec. 63.5590 In what form and how long must I keep my records?
* * * * *
(e) Any records required to be maintained by this part that are
submitted electronically via EPA's CEDRI may be maintained in
electronic format. This ability to maintain electronic copies does not
affect the requirement for facilities to make records, data, and
reports available upon request to a delegated air agency or EPA as part
of an on-site compliance evaluation.
0
12. Table 2 to Subpart UUUU is revised to read as follows:
Table 2 to Subpart UUUU of Part 63--Operating Limits
As required in Sec. 63.5505(b), you must meet the appropriate
operating limits in the following table:
------------------------------------------------------------------------
For the following control
technique . . . you must . . .
------------------------------------------------------------------------
1. condenser...................... maintain the daily average condenser
outlet gas or condensed liquid
temperature no higher than the
value established during the
compliance demonstration.
2. thermal oxidizer............... a. for periods of normal operation,
maintain the daily average thermal
oxidizer firebox temperature no
lower than the value established
during the compliance demonstration
b. after [DATE 180 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN THE
FEDERAL REGISTER] for existing
sources and new or reconstructed
sources for which construction or
reconstruction commenced after June
11, 2002, but on or before
September 9, 2019, and immediately
upon startup for new or
reconstructed sources for which
construction or reconstruction
commenced after September 9, 2019,
maintain documentation for periods
of startup demonstrating that the
oxidizer was properly operating
(e.g., firebox temperature had
reached the setpoint temperature)
prior to emission unit startup.
3. water scrubber................. a. for periods of normal operation,
maintain the daily average scrubber
pressure drop and scrubber liquid
flow rate within the range of
values established during the
compliance demonstration;
b. after [DATE 180 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN THE
FEDERAL REGISTER] for existing
sources and new or reconstructed
sources for which construction or
reconstruction commenced after June
11, 2002, but on or before
September 9, 2019], and immediately
upon startup for new or
reconstructed sources for which
construction or reconstruction
commenced after September 9, 2019,
maintain documentation for periods
of startup and shutdown to confirm
that the scrubber is operating
properly prior to emission unit
startup and continues to operate
properly until emission unit
shutdown is complete. Appropriate
startup and shutdown operating
parameters may be based on
equipment design, manufacturer's
recommendations, or other site-
specific operating values
established for normal operating
periods.
4. caustic scrubber............... a. for periods of normal operation,
maintain the daily average scrubber
pressure drop, scrubber liquid flow
rate, and scrubber liquid pH,
conductivity, or alkalinity within
the range of values established
during the compliance
demonstration;
b. after [DATE 180 DAYS AFTER DATE
OF PUBLICATION OF FINAL RULE IN THE
FEDERAL REGISTER] for existing
sources and new or reconstructed
sources for which construction or
reconstruction commenced after June
11, 2002, but on or before
September 9, 2019, and immediately
upon startup for new or
reconstructed sources for which
construction or reconstruction
commenced after September 9, 2019,
maintain documentation for periods
of startup and shutdown to confirm
that the scrubber is operating
properly prior to emission unit
startup and continues to operate
properly until emission unit
shutdown is complete. Appropriate
startup and shutdown operating
parameters may be based on
equipment design, manufacturer's
recommendations, or other site-
specific operating values
established for normal operating
periods.
5. flare.......................... maintain the presence of a pilot
flame.
6. biofilter...................... maintain the daily average biofilter
inlet gas temperature, biofilter
effluent pH or conductivity, and
pressure drop within the operating
values established during the
compliance demonstration.
[[Page 47379]]
7. carbon absorber................ maintain the regeneration frequency,
total regeneration adsorber stream
mass or volumetric flow during
carbon bed regeneration, and
temperature of the carbon bed after
regeneration (and within 15 minutes
of completing any cooling cycle(s))
for each regeneration cycle within
the values established during the
compliance demonstration.
8. oil absorber................... maintain the daily average
absorption liquid flow, absorption
liquid temperature, and steam flow
within the values established
during the compliance
demonstration.
9. any of the control techniques if using a CEMS, maintain the daily
specified in this table. average control efficiency of each
control device no lower than the
value established during the
compliance demonstration.
10. any of the control techniques a. if you wish to establish
specified in this table. alternative operating parameters,
submit the application for approval
of the alternative operating
parameters no later than the
notification of the performance
test or CEMS performance evaluation
or no later than 60 days prior to
any other initial compliance
demonstration;
b. the application must include:
Information justifying the request
for alternative operating
parameters (such as the
infeasibility or impracticality of
using the operating parameters in
this final rule); a description of
the proposed alternative control
device operating parameters; the
monitoring approach; the frequency
of measuring and recording the
alternative parameters; how the
operating limits are to be
calculated; and information
documenting that the alternative
operating parameters would provide
equivalent or better assurance of
compliance with the standard;
c. install, operate, and maintain
the alternative parameter
monitoring systems in accordance
with the application approved by
the Administrator;
d. establish operating limits during
the initial compliance
demonstration based on the
alternative operating parameters
included in the approved
application; and
e. maintain the daily average
alternative operating parameter
values within the values
established during the compliance
demonstration.
11. alternative control technique. a. submit for approval no later than
the notification of the performance
test or CEMS performance evaluation
or no later than 60 days prior to
any other initial compliance
demonstration a proposed site-
specific plan that includes: A
description of the alternative
control device; test results
verifying the performance of the
control device; the appropriate
operating parameters that will be
monitored; and the frequency of
measuring and recording to
establish continuous compliance
with the operating limits;
b. install, operate, and maintain
the parameter monitoring system for
the alternative control device in
accordance with the plan approved
by the Administrator;
c. establish operating limits during
the initial compliance
demonstration based on the
operating parameters for the
alternative control device included
in the approved plan; and
d. maintain the daily average
operating parameter values for the
alternative control technique
within the values established
during the compliance
demonstration.
------------------------------------------------------------------------
0
13. Table 3 to Subpart UUUU is revised to read as follows:
Table 3 to Subpart UUUU of Part 63--Initial Compliance With Emission
Limits and Work Practice Standards
As required in Sec. Sec. 63.5530(a) and 63.5535(g) and (h), you
must demonstrate initial compliance with the appropriate emission
limits and work practice standards according to the requirements in the
following table:
----------------------------------------------------------------------------------------------------------------
for the following you have demonstrated
For . . . at . . . emission limit or work initial compliance if .
practice standard . . . . .
----------------------------------------------------------------------------------------------------------------
1. the sum of all viscose process a. each existing i. reduce total (1) reduce total
vents. cellulose food casing uncontrolled sulfide uncontrolled sulfide
operation. emissions (reported as emissions (reported as
carbon disulfide) by carbon disulfide) by
at least 25% based on at least 25% based on
a 6-month rolling a 6-month rolling
average; average;
ii. for each vent (2) for each vent
stream that you stream that you
control using a control using a
control device, route control device, route
the vent stream the vent stream
through a closed-vent through a closed-vent
system to the control system to the control
device; and. device; and
iii. comply with the (3) comply with the
work practice standard work practice standard
for closed-vent for closed-vent
systems. systems.
[[Page 47380]]
b. each new cellulose i. reduce total (1) the average
food casing operation. uncontrolled sulfide uncontrolled total
emissions (reported as sulfide emissions,
carbon disulfide) by determined during the
at least 75% based on month-long compliance
a 6-month rolling demonstration or using
average; engineering
ii. for each vent assessments, are
stream that you reduced by at least
control using a 75%;
control device, route (2) you have a record
the vent stream of the range of
through a closed-vent operating parameter
system to the control values over the month-
device; and. long compliance
iii. comply with the demonstration during
work practice standard which the average
for closed-vent uncontrolled total
systems. sulfide emissions were
reduced by at least
75%;
(3) you prepare a
material balance that
includes the pertinent
data used to determine
the percent reduction
of total sulfide
emissions; and
(4) you comply with the
initial compliance
requirements for
closed-vent systems.
c. each existing rayon i. reduce total (1) the average
operation. uncontrolled sulfide uncontrolled total
emissions (reported as sulfide emissions,
carbon disulfide) by determined during the
at least 35% within 3 month-long compliance
years after the demonstration or using
effective date based engineering
on a 6-month rolling assessments, are
average; for each vent reduced by at least
stream that you 35% within 3 years
control using a after the effective
control device, route date;
the vent stream (2) you have a record
through a closed-vent of the average
system to the control operating parameter
device; and comply values over the month-
with the work practice long compliance
standard for closed- demonstration during
vent systems; and which the average
uncontrolled total
sulfide emissions were
reduced by at least
35%;
(3) you prepare a
material balance that
includes the pertinent
data used to determine
the percent reduction
of total sulfide
emissions; and
(4) you comply with the
initial compliance
requirements for
closed-vent systems;
and
ii. reduce total (1) the average
uncontrolled sulfide uncontrolled total
emissions (reported as sulfide emissions,
carbon disulfide) by determined during the
at least 40% within 8 month-long compliance
years after the demonstration or using
effective date based engineering
on a 6-month rolling assessments, are
average; for each vent reduced by at least
stream that you 40% within 8 years
control using a after the effective
control device, route date;
the vent stream (2) you have a record
through a closed-vent of the average
system to the control operating parameter
device; and comply values over the month-
with the work practice long compliance
standard for closed- demonstration during
vent systems. which the average
uncontrolled total
sulfide emissions were
reduced by at least
40%;
(3) you prepare a
material balance that
includes the pertinent
data used to determine
the percent reduction
of the total sulfide
emissions; and
(4) you comply with the
initial compliance
requirements for
closed-vent systems.
[[Page 47381]]
d. each new rayon i. reduce total (1) the average
operation. uncontrolled sulfide uncontrolled total
emissions (reported as sulfide emissions,
carbon disulfide) by determined during the
at least 75%; based on month-long compliance
a 6-month rolling demonstration or using
average; engineering
ii. for each vent assessments, are
stream that you reduced by at least
control using a 75%;
control device, route (2) you have a record
the vent stream of the average
through a closed-vent operating parameter
system to the control values over the month-
device; and. long compliance
iii. comply with the demonstration during
work practice standard which the average
for closed-vent uncontrolled total
systems. sulfide emissions were
reduced by at least
75%;
(3) you prepare a
material balance that
includes the pertinent
data used to determine
the percent reduction
of total sulfide
missions; and
(4) you comply with the
initial compliance
requirements for
closed-vent systems.
e. each existing or new i. reduce total (1) the average
cellulosic sponge uncontrolled sulfide uncontrolled total
operation. emissions (reported as sulfide emissions,
carbon disulfide) by determined during the
at least 75% based on month-long compliance
a 6-month rolling demonstration or using
average; engineering
ii. for each vent assessments, are
stream that you reduced by at least
control using a 75%;
control device, route (2) you have a record
the vent stream of the average
through a closed-vent operating parameter
system to the control values over the month-
device; and. long compliance
iii. comply with the demonstration during
work practice standard which the average
for closed-vent uncontrolled total
systems. sulfide emissions were
reduced by at least
75%;
(3) you prepare a
material balance that
includes the pertinent
data used to determine
and the percent
reduction of total
sulfide emissions; and
(4) you comply with the
initial compliance
requirements for
closed-vent systems.
f. each existing or new i. reduce total (1) the average
cellophane operation. uncontrolled sulfide uncontrolled total
emissions (reported as sulfide emissions,
carbon disulfide) by determined during the
at least 75% based on month-long compliance
a 6-month rolling demonstration or using
average; engineering
ii. for each vent assessments, are
stream that you reduced by at least
control using a 75%;
control device (except (2) you have a record
for retractable hoods of the average
over sulfuric acid operating parameter
baths at a cellophane values over the month-
operation), route the long compliance
vent stream through a demonstration during
closed-vent system to which the average
the control device; uncontrolled total
and. sulfide emissions were
iii. comply with the reduced by at least
work practice standard 75%;
for closed-vent (3) you prepare a
systems. material balance that
includes the pertinent
data used to determine
the percent reduction
of total sulfide
emissions; and
(4) you comply with the
initial compliance
requirements for
closed-vent systems.
[[Page 47382]]
2. the sum of all solvent coating a. each existing or new i. reduce uncontrolled (1) the average
process vents. cellophane operation. toluene emissions by uncontrolled toluene
at least 95% based on emissions, determined
a 6-month rolling during the month-long
average; compliance
ii. for each vent demonstration or using
stream that you engineering
control using a assessments, are
control device, route reduced by at least
the vent stream 95%;
through a closed-vent (2) you have a record
system to the control of the average
device; and. operating parameter
iii. comply with the values over the month-
work practice standard long compliance
for closed-vent demonstration during
systems. which the average
uncontrolled toluene
emissions were reduced
by at least 95%;
(3) you prepare a
material balance that
includes the pertinent
data used to determine
the percent reduction
of toluene emissions;
and
(4) you comply with the
initial compliance
requirements for
closed-vent systems.
3. the sum of all cellulose ether a. each existing or new i. reduce total (1) average
process vents. cellulose ether uncontrolled organic uncontrolled total
operation using a HAP emissions by at organic HAP emissions,
performance test to least 99%; ii. for measured during the
demonstrate initial each vent stream that performance test or
compliance; or. you control using a determined using
control device, route engineering estimates
the vent stream are reduced by at
through a closed-vent least 99%;
system to the control (2) you have a record
device; and iii. of the average
comply with the work operating parameter
practice standard for values over the
closed-vent systems; performance test
or during which the
average uncontrolled
total organic HAP
emissions were reduced
by at least 99%; and
(3) you comply with the
initial compliance
requirements for
closed-vent systems;
or
b. each existing or new i. reduce total (1) average
cellulose ether uncontrolled organic uncontrolled total
operation using a HAP emissions by at organic HAP emissions,
material balance least 99% based on a 6- determined during the
compliance month rolling average; month-long compliance
demonstration to ii. for each vent demonstration or using
demonstrate initial stream that you engineering estimates
compliance. control using a are reduced by at
control device, route least 99%;
the vent stream (2) you have a record
through a closed-vent of the average
system to the control operation parameter
device; and iii. values over the month-
comply with the work long compliance
practice standard for demonstration during
closed-vent systems; which the average
or. uncontrolled total
organic HAP emissions
were reduced by at
least 99%;
(3) you prepare a
material balance that
includes the pertinent
data used to determine
the percent reduction
of total organic HAP
emissions;
(4) if you use extended
cookout to comply, you
measure the HAP
charged to the
reactor, record the
grade of product
produced, and then
calculate reactor
emissions prior to
extended cookout by
taking a percentage of
the total HAP charged.
4. closed-loop systems............... each existing or new operate and maintain you have a record
cellulose ether the closed-loop system certifying that a
operation. for cellulose ether closed-loop system is
operations. in use for cellulose
ether operations.
[[Page 47383]]
5. each carbon disulfide unloading a. each existing or new i. reduce uncontrolled (1) you have a record
and storage operation. viscose process carbon disulfide documenting the 83%
affected source. emissions by at least reduction in
83% from unloading and uncontrolled carbon
storage operations disulfide emissions;
based on a 6-month and
rolling average if you (2) if venting to a
use an alternative control device to
control technique not reduce emissions, you
listed in this table comply with the
for carbon disulfide initial compliance
unloading and storage requirements for
operations; if using a closed-vent systems;
control device to
reduce emissions,
route emissions
through a closed-vent
system to the control
device; and comply
with the work practice
standard for closed-
vent systems;
ii. reduce uncontrolled (1) you comply with the
carbon disulfide by at initial compliance
least 0.14% from requirements for
viscose process vents viscose process vents
based on a 6-month at existing or new
rolling average; for cellulose food casing,
each vent stream that rayon, cellulosic
you control using a sponge, or cellophane
control device, route operations, as
the vent stream applicable;
through a closed-vent (2) the 0.14% reduction
system to the control must be in addition to
device; and comply the reduction already
with the work practice required for viscose
standard for closed- process vents at
vent systems; existing or new
cellulose food casing,
rayon, cellulosic
sponge, or cellophane
operations, as
applicable; and
(3) you comply with the
initial compliance
requirements for
closed-vent systems;
iii. install a nitrogen you have a record
unloading and storage certifying that a
system; or nitrogen unloading and
storage system is in
use; or
iv. install a nitrogen (1) you have a record
unloading system; certifying that a
reduce uncontrolled nitrogen unloading
carbon disulfide by at system is in use;
least 0.045% from (2) you comply with the
viscose process vents initial compliance
based on a 6-month requirements for
rolling average; for viscose process vents
each vent stream that at existing or new
you control using a cellulose food casing,
control device, route rayon, cellulosic
the vent stream sponge, or cellophane
through a closed-vent operations, as
system to the control applicable;
device; and comply (3) the 0.045%
with the work practice reduction must be in
standard for closed- addition to the
vent systems. reduction already
required for viscose
process vents at
cellulose food casing,
rayon, cellulosic
sponge, or cellophane
operations, as
applicable; and
(4) you comply with the
initial compliance
requirements for
closed-vent systems.
[[Page 47384]]
6. each toluene storage vessel....... a. each existing or new i. reduce uncontrolled (1) the average
cellophane operation. toluene emissions by uncontrolled toluene
at least 95% based on emissions, determined
a 6-month rolling during the month-long
average; compliance
ii. if using a control demonstration or using
device to reduce engineering
emissions, route the assessments, are
emissions through a reduced by at least
closed-vent system to 95%;
the control device; (2) you have a record
and. of the average
iii. comply with the operating parameter
work practice standard values over the month-
for closed-vent long compliance
systems. demonstration during
which the average
uncontrolled toluene
emissions were reduced
by at least 95%;
(3) you prepare a
material balance that
includes the pertinent
data used to determine
the percent reduction
of toluene emissions;
and
(4) if venting to a
control device to
reduce emissions, you
comply with the
initial compliance
requirements for
closed-vent systems.
7. equipment leaks................... a. each existing or new i. comply with the you comply with the
cellulose ether applicable equipment applicable
operation. leak standards of Sec. requirements described
Sec. 63.162 through in the Notification of
63.179; or Compliance Status
Report provisions in
Sec. 63.182(a)(2)
and (c)(1) through
(3), except that
references to the term
``process unit'' mean
``cellulose ether
process unit'' for the
purposes of this
subpart; or
ii. comply with the you comply with the
applicable equipment applicable
leak standards of Sec. requirements described
Sec. 63.1021 in the Initial
through 63.1027. Compliance Status
Report provisions of
Sec. 63.1039(a),
except that references
to the term ``process
unit'' mean
``cellulose ether
process unit'' for the
purposes of this
subpart.
8. all sources of wastewater each existing or new comply with the you comply with the
emissions. cellulose ether applicable wastewater applicability and
operation. provisions of Sec. Group 1/Group 2
63.105 and Sec. Sec. determination
63.132 through 63.140. provisions of Sec.
63.144 and the initial
compliance provisions
of Sec. Sec. 63.105
and 63.145.
9. liquid streams in open systems.... each existing or new comply with the you install emission
cellulose ether applicable provisions suppression equipment
operation. of Sec. 63.149, and conduct an initial
except that references inspection according
to ``chemical to the provisions of
manufacturing process to Sec. Sec. 63.133
unit'' mean through 63.137.
``cellulose ether
process unit'' for the
purposes of this
subpart.
10. closed-vent system used to route a. each existing or new i. conduct annual (1) you conduct an
emissions to a control device. affected source. inspections, repair initial inspection of
leaks, and maintain the closed-vent system
records as specified and maintain records
in Sec. 63.148. according to Sec.
63.148;
(2) you prepare a
written plan for
inspecting unsafe-to-
inspect and difficult-
to-inspect equipment
according to Sec.
63.148(g)(2) and
(h)(2); and
(3) you repair any
leaks and maintain
records according to
Sec. 63.148.
11. closed-vent system containing a a. each existing or new i. install, calibrate, you have a record
bypass line that could divert a vent affected source. maintain, and operate documenting that you
stream away from a control device, a flow indicator as installed a flow
except for equipment needed for specified in Sec. indicator as specified
safety purposes (described in Sec. 63.148(f)(1); or in Table 1 to this
63.148(f)(3)). subpart; or
[[Page 47385]]
ii. secure the bypass you have record
line valve in the documenting that you
closed position with a have secured the
car-seal or lock-and- bypass line valve as
key type configuration specified in Table 1
and inspect the seal to this subpart.
or closure mechanism
at least once per
month as specified in
Sec. 63.148(f)(2).
12. heat exchanger system that cools a. each existing or new i. monitor and repair (1) you determine that
process equipment or materials in affected source. the heat exchanger the heat exchanger
the process unit. system according to system is exempt from
Sec. 63.104(a) monitoring
through (e), except requirements because
that references to it meets one of the
``chemical conditions in Sec.
manufacturing process 63.104(a)(1) through
unit'' mean (6), and you document
``cellulose food this finding in your
casing, rayon, Notification of
cellulosic sponge, Compliance Status
cellophane, or Report; or
cellulose ether (2) if your heat
process unit'' for the exchanger system is
purposes of this not exempt, you
subpart. identify in your
Notification of
Compliance Status
Report the HAP or
other representative
substance that you
will monitor, or you
prepare and maintain a
site-specific plan
containing the
information required
by Sec. 63.104(c)
(1) (i) through (iv)
that documents the
procedures you will
use to detect leaks by
monitoring surrogate
indicators of the
leak.
----------------------------------------------------------------------------------------------------------------
0
14. Table 4 to Subpart UUUU is amended to read as follows:
Table 4 to Subpart UUUU of Part 63--Requirements for Performance Tests
As required in Sec. Sec. 63.5530(b) and 63.5535(a), (b), (g)(1),
and (h)(1), you must conduct performance tests, other initial
compliance demonstrations, and CEMS performance evaluations and
establish operating limits according to the requirements in the
following table:
----------------------------------------------------------------------------------------------------------------
according to the
For . . . at . . . you must . . . using . . . following
requirements . . .
----------------------------------------------------------------------------------------------------------------
1. the sum of all process vents. a. the sum of all i. select sampling EPA Method 1 or 1A sampling sites
process vents. port's location in appendix A-1 must be located
and the number of to 40 CFR part 60 at the inlet and
traverse points;. of this chapter; outlet to each
control device;
ii. determine EPA Method 2, 2A, you may use EPA
velocity and 2C, 2D, 2F, or 2G Method 2A, 2C,
volumetric flow in appendices A-1 2D, 2F, or 2G as
rate;. and A-2 to part an alternative to
60 of this using EPA Method
chapter. 2, as
appropriate;
iii. conduct gas (1) EPA Method 3, you may use EPA
analysis; and,. 3A, or 3B in Method 3A or 3B
appendix A-2 to as an alternative
part 60 of this to using EPA
chapter; or, Method 3; or,
(2) ASME PTC 19.10- you may use ASME
1981--Part 10 PTC 19.10-1981--
(incorporated by Part 10 as an
reference--see alternative to
Sec. 63.14); using the manual
and, procedures (but
not instrumental
procedures) in
EPA Method 3B.
iv. measure EPA Method 4 in
moisture content appendix A-3 to
of the stack gas. part 60 of this
chapter.
2. the sum of all viscose a. each existing i. measure total (1) EPA Method 15 (a) you must
process vents. or new viscose sulfide emissions. in appendix A-5 conduct testing
process source. to part 60 of of emissions at
this chapter; or the inlet and
outlet of each
control device;
(b) you must
conduct testing
of emissions from
continuous
viscose process
vents and
combinations of
batch and
continuous
viscose process
vents at normal
operating
conditions, as
specified in Sec.
63.5535;
(c) you must
conduct testing
of emissions from
batch viscose
process vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(d) you must
collect CPMS data
during the period
of the initial
compliance
demonstration and
determine the
CPMS operating
limit during the
period of the
initial
compliance
demonstration; or
(2) carbon (a) you must
disulfide and/or measure emissions
hydrogen sulfide at the inlet and
CEMS, as outlet of each
applicable; control device
using CEMS;
[[Page 47386]]
(b) you must
install, operate,
and maintain the
CEMS according to
the applicable
performance
specification (PS-
7, PS-8, PS-9, or
PS-15) of 40 CFR
part 60, appendix
B; and
(c) you must
collect CEMS
emissions data at
the inlet and
outlet of each
control device
during the period
of the initial
compliance
demonstration and
determine the
CEMS operating
limit during the
period of the
initial
compliance
demonstration.
3. the sum of all solvent a. each existing i. measure toluene (1) EPA Method 18 (a) you must
coating process vents. or new cellophane emissions. in appendix A-6 conduct testing
operation. to part 60 of of emissions at
this chapter, or the inlet and
Method 320 in outlet of each
appendix A to control device;
part 63; or.
(b) you may use
EPA Method 18 or
320 to determine
the control
efficiency of any
control device
for organic
compounds; for a
combustion
device, you must
use only HAP that
are present in
the inlet to the
control device to
characterize the
percent reduction
across the
combustion
device;
(c) you must
conduct testing
of emissions from
continuous
solvent coating
process vents and
combinations of
batch and
continuous
solvent coating
process vents at
normal operating
conditions, as
specified in Sec.
63.5535;
(d) you must
conduct testing
of emissions from
batch solvent
coating process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(d) you must
conduct testing
of emissions from
batch solvent
coating process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(2) ASTM D6420-99 (a) you must
(Reapproved 2010) conduct testing
(incorporated by of emissions at
reference--see the inlet and
Sec. 63.14); or. outlet of each
control device;
(b) you may use
ASTM D6420-99
(Reapproved 2010)
as an alternative
to EPA Method 18
only where: the
target
compound(s) are
known and are
listed in ASTM
D6420-99 as
measurable; this
ASTM should not
be used for
methane and
ethane because
their atomic mass
is less than 35;
ASTM D6420 should
never be
specified as a
total VOC method;
(c) you must
conduct testing
of emissions from
continuous
solvent coating
process vents and
combinations of
batch and
continuous
solvent coating
process vents at
normal operating
conditions, as
specified in Sec.
63.5535;
(d) you must
conduct testing
of emissions from
batch solvent
coating process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(e) you must
collect CPMS data
during the period
of the initial
compliance
demonstration and
determine the
CPMS operating
limit during the
period of the
initial
compliance
demonstration.
(3) ASTM D6348- (a) you must
12e1. conduct testing
of emissions at
the inlet and
outlet of each
control device;
[[Page 47387]]
(b) you may use
ASTM D6348-12e1
as an alternative
to EPA Method 320
only where the
following
conditions are
met: (1) The test
plan preparation
and
implementation in
the Annexes to
ASTM D 6348-03,
Sections A1
through A8 are
mandatory; and
(2) in ASTM D6348-
03 Annex A5
(Analyte Spiking
Technique), the
percent recovery
(%R) must be
determined for
each target
analyte (Equation
A5.5). In order
for the test data
to be acceptable
for a compound,
%R must be
greater than or
equal to 70
percent and less
than or equal to
130 percent. If
the %R value does
not meet this
criterion for a
target compound,
the test data are
not acceptable
for that compound
and the test must
be repeated for
that analyte
(i.e., the
sampling and/or
analytical
procedure should
be adjusted
before a retest).
The %R value for
each compound
must be reported
in the test
report, and all
field
measurements must
be corrected with
the calculated %R
value for that
compound by using
the following
equation:
Reported Results
= ((Measured
Concentration in
the Stack))/(%R)
x 100.
(c) you must
conduct testing
of emissions from
continuous
solvent coating
process vents and
combinations of
batch and
continuous
solvent coating
process vents at
normal operating
conditions, as
specified in Sec.
63.5535;
(d) you must
conduct testing
of emissions from
batch solvent
coating process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(e) you must
collect CPMS data
during the period
of the initial
compliance
demonstration and
determine the
CPMS operating
limit during the
period of the
initial
compliance
demonstration.
4. the sum of all cellulose a. each existing i. measure total (1) EPA Method 18 (a) you must
ether process vents. or new cellulose organic HAP in appendix A-6 conduct testing
ether operation. emissions. to part 60 of of emissions at
this chapter or the inlet and
Method 320 in outlet of each
appendix A to control device;
part 63, or. (b) you may use
EPA Method 18 or
320 to determine
the control
efficiency of any
control device
for organic
compounds; for a
combustion
device, you must
use only HAP that
are present in
the inlet to the
control device to
characterize the
percent reduction
across the
combustion
device;
(c) you must
conduct testing
of emissions from
continuous
cellulose ether
process vents and
combinations of
batch and
continuous
cellulose ether
process vents at
normal operating
conditions, as
specified in Sec.
63.5535;
(d) you must
conduct testing
of emissions from
batch cellulose
ether process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(d) you must
conduct testing
of emissions from
batch cellulose
ether process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(2) ASTM D6420-99 (a) you must
(Reapproved 2010) conduct testing
(incorporated by of emissions at
reference--see the inlet and
Sec. 63.14); or. outlet of each
control device;
[[Page 47388]]
(b) you may use
ASTM D6420-99
(Reapproved 2010)
as an alternative
to EPA Method 18
only where: the
target
compound(s) are
known and are
listed in ASTM
D6420-99 as
measurable; this
ASTM should not
be used for
methane and
ethane because
their atomic mass
is less than 35;
ASTM D6420 should
never be
specified as a
total VOC method;
(c) you must
conduct testing
of emissions from
continuous
cellulose ether
process vents and
combinations of
batch and
continuous
cellulose ether
process vents at
normal operating
conditions, as
specified in Sec.
63.5535;
(d) you must
conduct testing
of emissions from
batch cellulose
ether process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(e) you must
collect CPMS data
during the period
of the initial
performance test
and determine the
CPMS operating
limit during the
period of the
initial
performance test.
(3) ASTM D6348- (a) you must
12e1. conduct testing
of emissions at
the inlet and
outlet of each
control device;
(b) you may use
ASTM D6348-12e1
as an alternative
to EPA Method 320
only where the
following
conditions are
met: (1) The test
plan preparation
and
implementation in
the Annexes to
ASTM D 6348-03,
Sections A1
through A8 are
mandatory; and
(2) in ASTM D6348-
03 Annex A5
(Analyte Spiking
Technique), the
percent recovery
(%R) must be
determined for
each target
analyte (Equation
A5.5). In order
for the test data
to be acceptable
for a compound,
%R must be
greater than or
equal to 70
percent and less
than or equal to
130 percent. If
the %R value does
not meet this
criterion for a
target compound,
the test data are
not acceptable
for that compound
and the test must
be repeated for
that analyte
(i.e., the
sampling and/or
analytical
procedure should
be adjusted
before a retest).
The %R value for
each compound
must be reported
in the test
report, and all
field
measurements must
be corrected with
the calculated %R
value for that
compound by using
the following
equation:
Reported Results
= ((Measured
Concentration in
the Stack))/(%R)
x 100.
(c) you must
conduct testing
of emissions from
continuous
solvent coating
process vents and
combinations of
batch and
continuous
solvent coating
process vents at
normal operating
conditions, as
specified in Sec.
63.5535;
(d) you must
conduct testing
of emissions from
batch solvent
coating process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(e) you must
collect CPMS data
during the period
of the initial
compliance
demonstration and
determine the
CPMS operating
limit during the
period of the
initial
compliance
demonstration.
(3) EPA Method 25 (a) you must
in appendix A-7 conduct testing
to part 60 of of emissions at
this chapter; or. the inlet and
outlet of each
control device;
(b) you must
conduct testing
of emissions at
the inlet and
outlet of each
control device;
(c) you must
conduct testing
of emissions from
continuous
cellulose ether
process vents and
combinations of
batch and
continuous
cellulose ether
process vents at
normal operating
conditions, as
specified in Sec.
63.5535;
[[Page 47389]]
(d) you must
conduct testing
of emissions from
batch cellulose
ether process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(e) you must
collect CPMS data
during the period
of the initial
performance test
and determine the
CPMS operating
limit during the
period of the
initial
performance test;
or
(4) EPA Method 25A (a) you must
in appendix A-7 conduct testing
to part 60 of of emissions at
this chapter. the inlet and
outlet of each
control device;
(b) you may use
EPA Method 25A
if: an exhaust
gas volatile
organic matter
concentration of
50 ppmv or less
is required in
order to comply
with the emission
limit; the
volatile organic
matter
concentration at
the inlet to the
control device
and the required
level of control
are such as to
result in exhaust
volatile organic
matter
concentrations of
50 ppmv or less;
or because of the
high control
efficiency of the
control device,
the anticipated
volatile organic
matter
concentration at
the control
device exhaust is
50 ppmv or less,
regardless of the
inlet
concentration;
(c) you must
conduct testing
of emissions from
continuous
cellulose ether
process vents and
combinations of
batch and
continuous
cellulose ether
process vents at
normal operating
conditions, as
specified in Sec.
63.5535;
(d) you must
conduct testing
of emissions from
batch cellulose
ether process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part;
and,
(e) you must
collect CPMS data
during the period
of the initial
performance test
and determine the
CPMS operating
limit during the
period of the
initial
performance test.
5. each toluene storage vessel.. a. each existing i. measure toluene (1) EPA Method 18 (a) if venting to
or new cellophane emissions. in appendix A-6 a control device
operation. to part 60 of to reduce
this chapter or emissions, you
Method 320 in must conduct
appendix A to testing of
part 63; or. emissions at the
inlet and outlet
of each control
device;
(b) you may use
EPA Method 18 or
320 to determine
the control
efficiency of any
control device
for organic
compounds; for a
combustion
device, you must
use only HAP that
are present in
the inlet to the
control device to
characterize the
percent reduction
across the
combustion
device;
(c) you must
conduct testing
of emissions from
continuous
storage vessel
vents and
combinations of
batch and
continuous
storage vessel
vents at normal
operating
conditions, as
specified in Sec.
63.5535 for
continuous
process vents;
(d) you must
conduct testing
of emissions from
batch storage
vessel vents as
specified in Sec.
63.490(c) for
batch process
vents, except
that the emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part;
and,
(e) you must
collect CPMS data
during the period
of the initial
compliance
demonstration and
determine the
CPMS operating
limit during the
period of the
initial
compliance
demonstration; or
(2) ASTM D6420-99 (a) if venting to
(Reapproved 2010) a control device
(incorporated by to reduce
reference--see emissions, you
Sec. 63.14); or. must conduct
testing of
emissions at the
inlet and outlet
of each control
device;
[[Page 47390]]
(b) you may use
ASTM D6420-99
(Reapproved 2010)
as an alternative
to EPA Method 18
only where: the
target
compound(s) are
known and are
listed in ASTM
D6420-99 as
measurable; this
ASTM should not
be used for
methane and
ethane because
their atomic mass
is less than 35;
ASTM D6420 should
never be
specified as a
total VOC method;
(c) you must
conduct testing
of emissions from
continuous
storage vessel
vents and
combinations of
batch and
continuous
storage vessel
vents at normal
operating
conditions, as
specified in Sec.
63.5535 for
continuous
process vents;
(d) you must
conduct testing
of emissions from
batch storage
vessel vents as
specified in Sec.
63.490(c) for
batch process
vents, except
that the emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part;
and,
(e) you must
collect CPMS data
during the period
of the initial
compliance
demonstration and
determine the
CPMS operating
limit during the
period of the
initial
compliance
demonstration.
(3) ASTM D6348- (a) you must
12e1. conduct testing
of emissions at
the inlet and
outlet of each
control device;
(b) you may use
ASTM D6348-12e1
as an alternative
to EPA Method 320
only where the
following
conditions are
met: (1) The test
plan preparation
and
implementation in
the Annexes to
ASTM D 6348-03,
Sections A1
through A8 are
mandatory; and
(2) in ASTM D6348-
03 Annex A5
(Analyte Spiking
Technique), the
percent recovery
(%R) must be
determined for
each target
analyte (Equation
A5.5). In order
for the test data
to be acceptable
for a compound,
%R must be
greater than or
equal to 70
percent and less
than or equal to
130 percent. If
the %R value does
not meet this
criterion for a
target compound,
the test data are
not acceptable
for that compound
and the test must
be repeated for
that analyte
(i.e., the
sampling and/or
analytical
procedure should
be adjusted
before a retest).
The %R value for
each compound
must be reported
in the test
report, and all
field
measurements must
be corrected with
the calculated %R
value for that
compound by using
the following
equation:
Reported Results
= ((Measured
Concentration in
the Stack))/(%R)
x 100.
(c) you must
conduct testing
of emissions from
continuous
solvent coating
process vents and
combinations of
batch and
continuous
solvent coating
process vents at
normal operating
conditions, as
specified in Sec.
63.5535;
(d) you must
conduct testing
of emissions from
batch solvent
coating process
vents as
specified in Sec.
63.490(c),
except that the
emission
reductions
required for
process vents
under this
subpart supersede
the emission
reductions
required for
process vents
under subpart U
of this part; and
(e) you must
collect CPMS data
during the period
of the initial
compliance
demonstration and
determine the
CPMS operating
limit during the
period of the
initial
compliance
demonstration.
6. the sum of all process vents a. each existing i. measure visible (1) EPA Method 22 (a) you must
controlled using a flare. or new affected emissions. in appendix A-7 conduct the flare
source. to part 60 of visible emissions
this chapter. test according to
Sec. 63.11(b).
7. equipment leaks.............. a. each existing i. measure leak (1) applicable (a) you must
or new cellulose rate. equipment leak follow all
ether operation. test methods in requirements for
Sec. 63.180; or. the applicable
equipment leak
test methods in
Sec. 63.180; or
(2) applicable (a) you must
equipment leak follow all
test methods in requirements for
Sec. 63.1023. the applicable
equipment leak
test methods in
Sec. 63.1023.
[[Page 47391]]
8. all sources of wastewater a. each existing i. measure (1) applicable (a) You must
emissions. or new cellulose wastewater HAP wastewater test follow all
ether operation. emissions. methods and requirements for
procedures in the applicable
Sec. Sec. wastewater test
63.144 and methods and
63.145; or. procedures in
Sec. Sec.
63.144 and
63.145; or
(2) applicable (a) you must
wastewater test follow all
methods and requirements for
procedures in the applicable
Sec. Sec. waste water test
63.144 and methods and
63.145, using procedures in
ASTM D5790-95 Sec. Sec.
(Reapproved 2012) 63.144 and
as an alternative 63.145, except
to EPA Method 624 that you may use
in appendix A to ASTM D5790-95
part 163 of this (Reapproved 2012)
chapter.. as an alternative
to EPA Method
624, under the
condition that
this ASTM method
be used with the
sampling
procedures of EPA
Method 25D or an
equivalent
method.
9. any emission point........... a. each existing i. conduct a CEMS (1) applicable (a) you must
or new affected performance requirements in conduct the CEMS
source using a evaluation. Sec. 63.8 and performance
CEMS to applicable evaluation during
demonstrate performance the period of the
compliance. specification (PS- initial
7, PS-8, PS-9, or compliance
PS-15) in demonstration
appendix B to according to the
part 60 of this applicable
chapter. requirements in
Sec. 63.8 and
the applicable
performance
specification (PS-
7, PS-8, PS-9, or
PS-15) of 40 CFR
part 60, appendix
B;
(b) you must
install, operate,
and maintain the
CEMS according to
the applicable
performance
specification (PS-
7, PS-8, PS-9, or
PS-15) of 40 CFR
part 60, appendix
B; and
(c) you must
collect CEMS
emissions data at
the inlet and
outlet of each
control device
during the period
of the initial
compliance
demonstration and
determine the
CEMS operating
limit during the
period of the
initial
compliance
demonstration.
----------------------------------------------------------------------------------------------------------------
0
15. Table 5 to Subpart UUUU is revised to read as follows:
Table 5 to Subpart UUUU of Part 63--Continuous Compliance With Emission
Limits and Work Practice Standards
As required in Sec. 63.5555(a), you must demonstrate continuous
compliance with the appropriate emission limits and work practice
standards according to the requirements in the following table:
----------------------------------------------------------------------------------------------------------------
for the following you must demonstrate
For . . . at . . . emission limit or work continuous compliance
practice standard . . . by . . .
----------------------------------------------------------------------------------------------------------------
1. the sum of all viscose process a. each existing or new i. reduce total (1) maintaining a
vents. viscose process uncontrolled sulfide material balance that
affected source. emissions (reported as includes the pertinent
carbon disulfide) by data used to determine
at least the specified the percent reduction
percentage based on a of total sulfide
6-month rolling emissions;
average;. (2) documenting the
ii. for each vent percent reduction of
stream that you total sulfide
control using a emissions using the
control device (except pertinent data from
for retractable hoods the material balance;
over sulfuric acid and
baths at a cellophane (3) complying with the
operation), route the continuous compliance
vent stream through a requirements for
closed-vent system to closed-vent systems.
the control device;
and.
iii. comply with the
work practice standard
for closed-vent
systems (except for
retractable hoods over
sulfuric acid baths at
a cellophane
operation).
2. the sum of all solvent coating a. each existing or new i. reduce uncontrolled (1) maintaining a
process vents. cellophane operation. toluene emissions by material balance that
at least 95% based on includes the pertinent
a 6-month rolling data used to determine
average;. the percent reduction
ii. for each vent of toluene emissions;
stream that you (2) documenting the
control using a percent reduction of
control device, route toluene emissions
the vent stream using the pertinent
through a closed-vent data from the material
system to the control balance; and
device; and. (3) complying with the
iii. comply with the continuous compliance
work practice standard requirements for
for closed-vent closed-vent systems.
systems.
3. the sum of all cellulose ether a. each existing or new i. reduce total (1) complying with the
process vents. cellulose ether uncontrolled organic continuous compliance
operation using a HAP emissions by at requirements for
performance test to least 99%;. closed-vent systems;
demonstrate initial ii. for each vent or
compliance; or. stream that you (2) if using extended
control using a cookout to comply,
control device, route monitoring reactor
the vent stream charges and keeping
through a closed-vent records to show that
system to the control extended cookout was
device; and,. employed.
iii. comply with the
work practice standard
for closed-vent
systems; or.
[[Page 47392]]
b. each existing or new i. reduce total (1) maintaining a
cellulose ether uncontrolled organic material balance that
operation using a HAP emissions by at includes the pertinent
material balance least 99% based on a 6- data used to determine
compliance month rolling average;. the percent reduction
demonstration to ii. for each vent of total organic HAP
demonstrate initial stream that you emissions;
compliance. control using a (2) documenting the
control device, route percent reduction of
the vent stream total organic HAP
through a closed-vent emissions using the
system to control pertinent data from
device; and. the material balance;
iii. comply with the (3) if using extended
work practice standard cookout to comply,
for closed-vent monitoring reactor
systems. charges and keeping
records to show that
extended cookout was
employed;
(4) complying with the
continuous compliance
requirements for
closed-vent systems.
4. closed-loop systems............... each existing or new operate and maintain a keeping a record
cellulose either closed-loop system. certifying that a
operation. closed-loop system is
in use for cellulose
ether operations.
5. each carbon disulfide unloading a. each existing or new i. reduce uncontrolled (1) keeping a record
and storage operation. viscose process carbon disulfide documenting the 83%
affected source. emissions by at least reduction in carbon
83% based on a 6-month disulfide emissions;
rolling average if you and (2) if venting to
use an alternative a control device to
control technique not reduce emissions,
listed in this table complying with the
for carbon disulfide continuous compliance
unloading and storage requirements for
operations; if using a closed-vent systems;
control device to
reduce emissions,
route emissions
through a closed-vent
system to the control
device; and comply
with the work practice
standard for closed-
vent systems;.
ii. reduce total (1) maintaining a
uncontrolled sulfide material balance that
emissions by at least includes the pertinent
0.14% from viscose data used to determine
process vents based on the percent reduction
a 6-month rolling of total sulfide
average; for each vent emissions;
stream that you (2) documenting the
control using a percent reduction of
control device, route total sulfide
the vent stream emissions using the
through a closed-vent pertinent data from
system to the control the material balance;
device; and comply and
with the work practice (3) complying with the
standard for closed- continuous compliance
vent systems;. requirements for
closed-vent systems;
iii. install a nitrogen Keeping a record
unloading and storage certifying that a
system; or. nitrogen unloading and
storage system is in
use; or
iv. install a nitrogen (1) keeping a record
unloading system; certifying that a
reduce total nitrogen unloading
uncontrolled sulfide system is in use;
emissions by at least (2) maintaining a
0.045% from viscose material balance that
process vents based on includes the pertinent
a 6-month rolling data used to determine
average; for each vent the percent reduction
stream that you of total sulfide
control using a emissions;
control device, route (3) documenting the
the vent stream percent reduction of
through a closed-vent total sulfide
system to the control emissions using the
device; and comply pertinent data from
with the work practice the material balance;
standard for closed- and
vent systems. (4) complying with the
continuous compliance
requirements for
closed-vent systems.
6. each toluene storage vessel....... a. each existing or new a. each existing or new (1) maintaining a
cellophane operation. cellophane operation. material balance that
includes the pertinent
data used to determine
the percent reduction
of toluene emissions;
(2) documenting the
percent reduction of
toluene emissions
using the pertinent
data from the material
balance; and
(3) if venting to a
control device to
reduce emissions,
complying with the
continuous compliance
requirements for
closed-vent systems.
7. equipment leaks................... a. each existing or new i. applicable equipment complying with the
cellulose ether leak standards of Sec. applicable equipment
operation. Sec. 63.162 through leak continuous
63.179; or. compliance provisions
ii. applicable of Sec. Sec. 63.162
equipment leak through 63.179; or
standards of Sec. complying with the
Sec. 63.1021 through applicable equipment
63.1037. leak continuous
compliance provisions
of Sec. Sec.
63.1021 through
63.1037.
8. all sources of wastewater each existing or new applicable wastewater complying with the
emissions. cellulose either provisions of Sec. applicable wastewater
operation. 63.105 and Sec. Sec. continuous compliance
63.132 through provisions of Sec.
63.140.. Sec. 63.105, 63.143,
and 63.148.
9. liquid streams in open systems.... each existing or new comply with the conducting inspections,
cellulose ether applicable provisions repairing failures,
operation. of Sec. 63.149, documenting delay of
except that references repair, and
to ``chemical maintaining records of
manufacturing process failures and
unit'' mean corrective actions
``cellulose ether according to Sec.
process unit'' for the Sec. 63.133 through
purposes of this 63.137.
subpart.
[[Page 47393]]
10. closed-vent system used to route each existing or new conduct annual conducting the
emissions to a control device. affected source. inspections, repair inspections, repairing
leaks, maintain leaks, and maintaining
records as specified records according to
in Sec. 63.148. Sec. 63.148.
11. closed-vent system containing a a. each existing or new i. install, calibrate, (1) taking readings
bypass line that could divert a vent affected source. maintain, and operate from the flow
stream away from a control device, a flow indicator as indicator at least
except for equipment needed for specified in Sec. once every 15 minutes;
safety purposes (described in Sec. 63.148(f)(1); or. (2) maintaining hourly
63.148(f)(3). records of flow
indicator operation
and detection of any
diversion during the
hour, and
(3) recording all
periods when the vent
stream is diverted
from the control
stream or the flow
indicator is not
operating; or
....................... ii. secure the bypass (1) maintaining a
line valve in the record of the monthly
closed position with a visual inspection of
car-seal or lock-and- the seal or closure
key type configuration mechanism for the
and inspect the seal bypass line; and
or mechanism at least (2) recording all
once per month as periods when the seal
specified in Sec. mechanism is broken,
63.148(f)(2).. the bypass line valve
position has changed,
or the key for a lock-
and-key type lock has
been checked out.
12. heat exchanger system that cools a. each existing or new i. monitor and repair (1) monitoring for HAP
process equipment or materials in affected source. the heat exchanger compounds, other
the process unit. system according to substances, or
Sec. 63.104(a) surrogate indicators
through (e), except at the frequency
that references to specified in Sec.
``chemical 63.104(b) or (c);
manufacturing process (2) repairing leaks
unit'' mean within the time period
``cellulose food specified in Sec.
casing, rayon, 63.104(d)(1);
cellulosic sponge, (3) confirming that the
cellophane, or repair is successful
cellulose ether as specified in Sec.
process unit'' for the 63.104(d)(2);
purposes of this (4) following the
subpart. procedures in Sec.
63.104(e) if you
implement delay of
repair; and
(5) recording the
results of inspections
and repair according
to Sec.
63.104(f)(1).
----------------------------------------------------------------------------------------------------------------
0
16. Table 6 to Subpart UUUU is revised to read as follows:
Table 6 to Subpart UUUU of Part 63--Continuous Compliance With
Operating Limits
As required in Sec. 63.5555(a), you must demonstrate continuous
compliance with the appropriate operating limits according to the
requirements in the following table:
------------------------------------------------------------------------
you must demonstrate
For the following control for the following continuous
technique . . . operating limit . . compliance by . . .
.
------------------------------------------------------------------------
1. condenser................ maintain the daily collecting the
average condenser condenser outlet
outlet gas or gas or condensed
condensed liquid liquid temperature
temperature no data according to
higher than the Sec. 63.5545;
value established reducing the
during the condenser outlet
compliance gas temperature
demonstration. data to daily
averages; and
maintaining the
daily average
condenser outlet
gas or condensed
liquid temperature
no higher than the
value established
during the
compliance
demonstration.
2. thermal oxidizer......... a. for normal collecting the
operations, thermal oxidizer
maintain the daily firebox temperature
average thermal data according to
oxidizer firebox Sec. 63.5545;
temperature no reducing the
lower than the thermal oxidizer
value established firebox temperature
during the data to daily
compliance averages; and
demonstration. maintaining the
daily average
thermal oxidizer
firebox temperature
no lower than the
value established
during the
compliance
demonstration.
b. for periods of collecting the
startup, maintain appropriate, site-
documentation specific data
demonstrating that needed to
the oxidizer was demonstrate that
properly operating the oxidizer was
(e.g., firebox properly operating
temperature had prior to emission
reached the unit start up; and
setpoint excluding firebox
temperature) prior temperature from
to emission unit the daily averages
startup. during emission
unit startup.
3. water scrubber........... a. for normal collecting the
operations, scrubber pressure
maintain the daily drop and scrubber
average scrubber liquid flow rate
pressure drop and data according to
scrubber liquid Sec. 63.5545;
flow rate within reducing the
the range of values scrubber parameter
established during data to daily
the compliance averages; and
demonstration. maintaining the
daily scrubber
parameter values
within the range of
values established
during the
compliance
demonstration.
[[Page 47394]]
b. for periods of collecting the
startup and appropriate, site-
shutdown, maintain specific data
documentation to needed to
confirm that the demonstrate that
scrubber is the scrubber was
operating properly operating properly
prior to emission during emission
unit startup and unit startup and
continues to emission unit
operate properly shutdown; and
until emission unit excluding
shutdown is parameters from the
complete. daily average
Appropriate startup calculations.
and shutdown
operating
parameters may be
based on equipment
design,
manufacturer's
recommendations, or
other site-specific
operating values
established for
normal operating
periods.
4. caustic scrubber......... a. for normal collecting the
operations, scrubber pressure
maintain the daily drop, scrubber
average scrubber liquid flow rate,
pressure drop, and scrubber liquid
scrubber liquid pH, conductivity,
flow rate, and or alkalinity data
scrubber liquid pH, according to Sec.
conductivity, or 63.5545; reducing
alkalinity within the scrubber
the range of values parameter data to
established during daily averages; and
the compliance maintaining the
demonstration. daily scrubber
parameter values
within the range of
values established
during the
compliance
demonstration.
b. for periods of collecting the
startup and appropriate, site-
shutdown, maintain specific data
documentation to needed to
confirm that the demonstrate that
scrubber is the scrubber was
operating properly operating properly
prior to emission during emission
unit startup and unit startup and
continues to emission unit
operate properly shutdown; and
until emission unit excluding
shutdown is parameters from the
complete. daily average
Appropriate startup calculations.
and shutdown
operating
parameters may be
based on equipment
design,
manufacturer's
recommendations, or
other site-specific
operating values
established for
normal operating
periods.
5. flare.................... maintain the collecting the pilot
presence of a pilot flame data
flame. according to Sec.
63.5545; and
maintaining the
presence of the
pilot flame.
6. biofilter................ maintain the daily collecting the
average biofilter biofilter inlet gas
inlet gas temperature,
temperature, biofilter effluent
biofilter effluent pH or conductivity,
pH or conductivity, and biofilter
and pressure drop pressure drop data
within the values according to Sec.
established during 63.5545; reducing
the compliance the biofilter
demonstration. parameter data to
daily averages; and
maintaining the
daily biofilter
parameter values
within the values
established during
the compliance
demonstration.
7. carbon absorber.......... maintain the collecting the data
regeneration on regeneration
frequency, total frequency, total
regeneration stream regeneration stream
mass or volumetric mass or volumetric
flow during carbon flow during carbon
bed regeneration bed regeneration
and temperature of and temperature of
the carbon bed the carbon bed
after regeneration after regeneration
(and within 15 (and within 15
minutes of minutes of
completing any completing any
cooling cycle(s)) cooling cycle(s))
for each for each
regeneration cycle regeneration cycle
within the values according to Sec.
established during 63.5545; and
the compliance maintaining carbon
demonstration. absorber parameter
values for each
regeneration cycle
within the values
established during
the compliance
demonstration.
8. oil absorber............. maintain the daily collecting the
average absorption absorption liquid
liquid flow, flow, absorption
absorption liquid liquid temperature,
temperature, and and steam flow data
steam flow within according to Sec.
the values 63.5545; reducing
established during the oil absorber
the compliance parameter data to
demonstration. daily averages; and
maintaining the
daily oil absorber
parameter values
within the values
established during
the compliance
demonstration.
9. any of the control if using a CEMS, collecting CEMS
techniques specified in maintain the daily emissions data at
this table. average control the inlet and
efficiency for each outlet of each
control device no control device
lower than the according to Sec.
value established 63.5545;
during the determining the
compliance control efficiency
demonstration. values for each
control device
using the inlet and
outlet CEMS
emissions data;
reducing the
control efficiency
values for each
control device to
daily averages; and
maintaining the
daily average
control efficiency
for each control
device no lower
than the value
established during
the compliance
demonstration.
------------------------------------------------------------------------
0
17. Table 7 to Subpart UUUU is revised to read as follows:
Table 7 to Subpart UUUU of Part 63--Notifications
As required in Sec. Sec. 63.5490(c)(4), 63.5530(c), 63.5575, and
63.5595(b), you must submit the appropriate notifications specified in
the following table:
------------------------------------------------------------------------
If you . . . then you must . . .
------------------------------------------------------------------------
1. are required to conduct a submit a notification of intent
performance test. to conduct a performance test
at least 60 calendar days
before the performance test is
scheduled to begin, as
specified in Sec. Sec.
63.7(b)(1) and 63.9(e).
[[Page 47395]]
2. are required to conduct a CMS submit a notification of intent
performance evaluation. to conduct a CMS performance
evaluation at least 60
calendar days before the CMS
performance evaluation is
scheduled to begin, as
specified in Sec. Sec.
63.8(e)(2) and 63.9(g).
3. wish to use an alternative submit a request to use
monitoring method. alternative monitoring method
no later than the notification
of the initial performance
test or CMS performance
evaluation or 60 days prior to
any other initial compliance
demonstration, as specified in
Sec. 63.8(f)(4).
4. start up your affected source before submit an initial notification
June 11, 2002. no later than 120 days after
June 11, 2002, as specified in
Sec. 63.9(b)(2).
5. start up your new or reconstructed submit an initial notification
source on or after June 11, 2002. no later than 120 days after
you become subject to this
subpart, as specified in Sec.
63.9(b)(3).
6. cannot comply with the relevant submit a request for extension
standard by the applicable compliance of compliance no later than
date. 120 days before the compliance
date, as specified in Sec.
Sec. 63.9(c) and 63.6(i)(4).
7. are subject to special requirements notify the Administrator of
as specified in Sec. 63.6(b)(3) and your compliance obligations no
(4). later than the initial
notification dates established
in Sec. 63.9(b) for new
sources not subject to the
special provisions, as
specified in Sec. 63.9(d).
8. are required to conduct visible notify the Administrator of the
emission observations to determine the anticipated date for
compliance of flares as specified in conducting the observations
Sec. 63.11(b)(4). specified in Sec.
63.6(h)(5), as specified in
Sec. Sec. 63.6(h)(4) and
63.9(f).
9. are required to conduct a a. submit a Notification of
performance test or other initial Compliance Status Report, as
compliance demonstration as specified specified in Sec. 63.9(h);
in Table 3 to this subpart. b. submit the Notification of
Compliance Status Report,
including the performance
test, CEMS performance
evaluation, and any other
initial compliance
demonstration results within
240 calendar days following
the compliance date specified
in Sec. 63.5495; and
c. beginning on [DATE 180 DAYS
AFTER DATE OF PUBLICATION OF
FINAL RULE IN THE FEDERAL
REGISTER], submit all
subsequent Notifications of
Compliance Status following
the procedure specified in
Sec. 63.5580(g), (j), and
(k).
10. comply with the equipment leak comply with the notification
requirements of subpart H of this part requirements specified in Sec.
for existing or new cellulose ether 63.182(a)(1) and (2), (b),
affected sources. and (c)(1) through (3) for
equipment leaks, with the
Notification of Compliance
Status Reports required in
subpart H included in the
Notification of Compliance
Status Report required in this
subpart.
11. comply with the equipment leak comply with the notification
requirements of subpart UU of this requirements specified in Sec.
part for existing or new cellulose 63.1039(a) for equipment
ether affected sources. leaks, with the Notification
Compliance Status Reports
required in subpart UU of this
part included in the
Notification of Compliance
Status Report required in this
subpart.
12. comply with the wastewater comply with the notification
requirements of subparts F and G of requirements specified in Sec.
this part for existing or new Sec. 63.146(a) and (b),
cellulose ether affected sources. 63.151, and 63.152(a)(1)
through (3) and (b)(1) through
(5) for wastewater, with the
Notification of Compliance
Status Reports required in
subpart G of this part
included in the Notification
of Compliance Status Report
required in this subpart.
------------------------------------------------------------------------
0
18. Table 8 to Subpart UUUU is revised to read as follows:
Table 8 to Subpart UUUU of Part 63--Reporting Requirements
As required in Sec. 63.5580, you must submit the appropriate
reports specified in the following table:
------------------------------------------------------------------------
You must submit a compliance report, which
must contain the following information . . and you must submit the
. report . . .
------------------------------------------------------------------------
1. if there are no deviations from any semiannually as specified in
emission limit, operating limit, or work Sec. 63.5580(b);
practice standard during the reporting beginning on [DATE 180 DAYS
period, then the report must contain the AFTER PUBLICATION OF FINAL
information specified in Sec. RULE IN THE FEDERAL
63.5580(c);. REGISTER], submit all
subsequent reports
following the procedure
specified in Sec.
63.5580(g).
2. if there were no periods during which
the CMS was out-of-control, then the
report must contain the information
specified in Sec. 63.5580(c)(6);.
3. if there is a deviation from any
emission limit, operating limit, or work
practice standard during the reporting
period, then the report must contain the
information specified in Sec.
63.5580(c) and (d);.
4. if there were periods during which the
CMS was out-of-control, then the report
must contain the information specified in
Sec. 63.5580(e);.
5. if prior to [DATE 180 DAYS AFTER
PUBLICATION OF FINAL RULE IN THE Federal
Register], you had a startup, shutdown,
or malfunction during the reporting
period and you took actions consistent
with your SSM plan, then the report must
contain the information specified in Sec.
63.10(d)(5)(i);.
[[Page 47396]]
6. if prior to [DATE 180 DAYS AFTER
PUBLICATION OF FINAL RULE IN THE FEDERAL
REGISTER], you had a startup, shutdown,
or malfunction during the reporting
period and you took actions that are not
consistent with your SSM plan, then the
report must contain the information
specified in Sec. 63.10(d)(5)(ii);.
7. the report must contain any change in
information already provided, as
specified in Sec. 63.9(j);.
8. for cellulose ether affected sources
complying with the equipment leak
requirements of subpart H of this part,
the report must contain the information
specified in Sec. 63.182(a)(3) and (6)
and (d)(2) through (4);.
9. for cellulose ether affected sources
complying with the equipment leak
requirements of subpart UU of this part,
the report must contain the information
specified in Sec. 63.1039(b);.
10. for cellulose ether affected sources
complying with the wastewater
requirements of subparts F and G of this
part, the report must contain the
information specified in Sec. Sec.
63.146(c) through (e) and 63.152(a)(4)
and (5) and (c) through (e);.
11. for affected sources complying with
the closed-vent system provisions in Sec.
63.148, the report must contain the
information specified in Sec.
63.148(j)(1);.
12. for affected sources complying with
the bypass line provisions in Sec.
63.148(f), the report must contain the
information specified in Sec.
63.148(j)(2) and (3);.
13. for affected sources invoking the
delay of repair provisions in Sec.
63.104(e) for heat exchanger systems, the
next compliance report must contain the
information in Sec. 63.104(f)(2)(i)
through (iv); if the leak remains
unrepaired, the information must also be
submitted in each subsequent compliance
report until the repair of the leak is
reported; and.
14. for storage vessels subject to the
emission limits and work practice
standards in Table 1 to Subpart UUUU, the
report must contain the periods of
planned routine maintenance during which
the control device does not comply with
the emission limits or work practice
standards in Table 1 to this subpart.
------------------------------------------------------------------------
0
19. Table 9 to Subpart UUUU is revised to read as follows:
Table 9 to Subpart UUUU of Part 63--Recordkeeping Requirements
As required in Sec. 63.5585, you must keep the appropriate records
specified in the following table:
------------------------------------------------------------------------
then you must keep and the record(s)
If you operate . . . . . . must contain . . .
------------------------------------------------------------------------
1. an existing or new affected a copy of each all documentation
source. notification and supporting any
report that you Initial
submitted to Notification or
comply with this Notification of
subpart. Compliance Status
Report that you
submitted,
according to the
requirements in
Sec.
63.10(b)(2)(xiv),
and any
compliance report
required under
this subpart.
2. an existing or new affected a. the records in i. SSM plan;
source that commenced Sec. ii. when actions
construction or reconstruction 63.6(e)(3)(iii) taken during a
before September 9, 2019. through (iv) startup,
related to shutdown, or
startup, malfunction are
shutdown, and consistent with
malfunction prior the procedures
to [DATE 180 DAYS specified in the
AFTER DATE OF SSM plan, records
PUBLICATION OF demonstrating
FINAL RULE IN THE that the
FEDERAL REGISTER]. procedures
specified in the
plan were
followed;
iii. records of
the occurrence
and duration of
each startup,
shutdown, or
malfunction; and
iv. when actions
taken during a
startup,
shutdown, or
malfunction are
not consistent
with the
procedures
specified in the
SSM plan, records
of the actions
taken for that
event.
[[Page 47397]]
b. records related i. record the
to startup and date, time, and
shutdown, duration of each
failures to meet startup and/or
the standard, and shutdown period,
actions taken to including the
minimize periods when the
emissions after affected source
[DATE 180 DAYS was subject to
AFTER DATE OF the alternative
PUBLICATION OF operating
FINAL RULE IN THE parameters
FEDERAL REGISTER]. applicable to
startup and
shutdown;
ii. in the event
that an affected
unit fails to
meet an
applicable
standard, record
the number of
failures. For
each failure,
record the date,
time and duration
of each failure;
iii. for each
failure to meet
an applicable
standard, record
and retain a list
of the affected
sources or
equipment, an
estimate of the
quantity of each
regulated
pollutant emitted
over any emission
limit and a
description of
the method used
to estimate the
emissions; and
iv. record actions
taken to minimize
emissions in
accordance with
Sec.
63.5515(b), and
any corrective
actions taken to
return the
affected unit to
its normal or
usual manner of
operation.
3. a new or reconstructed a. records related i. record the
affected source that commenced to startup and date, time, and
construction or reconstruction shutdown, duration of each
after September 9, 2019. failures to meet startup and/or
the standard, and shutdown period,
actions taken to including the
minimize periods when the
emissions. affected source
was subject to
alternative
operating
parameters
applicable to
startup and
shutdown;
ii. in the event
that an affected
unit fails to
meet an
applicable
standard, record
the number of
failures. For
each failure,
record the date,
time and duration
of each failure;
iii. for each
failure to meet
an applicable
standard, record
and retain a list
of the affected
sources or
equipment, an
estimate of the
quantity of each
regulated
pollutant emitted
over any emission
limit and a
description of
the method used
to estimate the
emissions; and
iv. record actions
taken to minimize
emissions in
accordance with
Sec.
63.5515(b), and
any corrective
actions taken to
return the
affected unit to
its normal or
usual manner of
operation.
4. an existing or new affected a. a site-specific i. information
source. monitoring plan. regarding the
installation of
the CMS sampling
source probe or
other interface
at a measurement
location relative
to each affected
process unit such
that the
measurement is
representative of
control of the
exhaust emissions
(e.g., on or
downstream of the
last control
device);
ii. performance
and equipment
specifications
for the sample
interface, the
pollutant
concentration or
parametric signal
analyzer, and the
data collection
and reduction
system;
iii. performance
evaluation
procedures and
acceptance
criteria (e.g.,
calibrations);
iv. ongoing
operation and
maintenance
procedures in
accordance with
the general
requirements of
Sec. Sec.
63.8(c)(3) and
(4)(ii),
63.5515(b), and
63.5580(c)(6);
v. ongoing data
quality assurance
procedures in
accordance with
the general
requirements of
Sec.
63.8(d)(2); and
vi. ongoing
recordkeeping and
reporting
procedures in
accordance with
the general
requirements of
Sec. Sec.
63.10(c)(1)-(6),
(c)(9)-(14),
(e)(1), and
(e)(2)(i) and
63.5585.
5. an existing or new affected records of all results of
source. performance tests performance
and CEMS tests, CEMS
performance performance
evaluations, as evaluations, and
required in Sec. any other initial
63.10(b)(2)(viii compliance
) and any other demonstrations,
initial including
compliance analysis of
demonstrations. samples,
determination of
emissions, and
raw data.
[[Page 47398]]
6. an existing or new affected a. records for i. records
source. each CEMS. described in Sec.
63.10(b)(2)(vi)
through (xi);
ii. previous
(superseded)
versions of the
performance
evaluation plan,
with the program
of corrective
action included
in the plan
required under
Sec.
63.8(d)(2);
iii. request for
alternatives to
relative accuracy
test for CEMS as
required in Sec.
63.8(f)(6)(i);
iv. records of the
date and time
that each
deviation started
and stopped, and
whether the
deviation
occurred during a
period of
startup,
shutdown, or
malfunction or
during another
period; and
v. records
required in Table
6 to Subpart UUUU
to show
continuous
compliance with
the operating
limit.
7. an existing or new affected a. records for i. records
source. each CPMS. required in Table
6 to Subpart UUUU
to show
continuous
compliance with
each operating
limit that
applies to you;
and
ii. results of
each CPMS
calibration,
validation check,
and inspection
required by Sec.
63.5545(b)(4).
8. an existing or new cellulose records of closed- records certifying
ether affected ether source. loop systems. that a closed-
loop system is in
use for cellulose
ether operations.
9. an existing or new viscose records of records of
process affected source. nitrogen nitrogen
unloading and unloading and
storage systems storage systems
or nitrogen or nitrogen
unloading systems. unloading systems
10. an existing or new viscose records of all pertinent data
process affected source. material balances. from the material
balances used to
estimate the 6-
month rolling
average percent
reduction in HAP
emissions.
11. an existing or new viscose records of documenting the
process affected source. calculations. percent reduction
in HAP emissions
using pertinent
data from the
material
balances.
12. an existing or new cellulose a. extended i. the amount of
ether affected source. cookout records. HAP charged to
the reactor;
ii. the grade of
product produced;
iii. the
calculated amount
of HAP remaining
before extended
cookout; and
iv. information
showing that
extended cookout
was employed.
13. an existing or new cellulose a. equipment leak i. the records
ether affected source. records. specified in Sec.
63.181 for
equipment leaks;
or
ii. the records
specified in
63.1038 for
equipment leaks.
14. an existing or new cellulose wastewater records the records
ether affected source. specified in Sec.
Sec. 63.105,
63.147, and
63.152(f) and (g)
for wastewater.
15. an existing or new affected closed-vent system the records
source. records. specified in Sec.
63.148(i).
16. an existing or new affected a. bypass line i. hourly records
source. records. of flow indicator
operation and
detection of any
diversion during
the hour and
records of all
periods when the
vent stream is
diverted from the
control stream or
the flow
indicator is not
operating; or
ii. the records of
the monthly
visual inspection
of the seal or
closure mechanism
and of all
periods when the
seal mechanism is
broken, the
bypass line valve
position has
changed, or the
key for a lock-
and-key type lock
has been checked
out and records
of any car-seal
that has broken.
17. an existing or new affected heat exchanger records of the
source. system records. results of
inspections and
repair according
to source Sec.
63.104(f)(1).
18. an existing or new affected control device records of planned
source. maintenance routine
records. maintenance for
control devices
used to comply
with the percent
reduction
emission limit
for storage
vessels in Table
1 to Subpart
UUUU.
19. an existing or new affected safety device a record of each
source. records. time a safety
device is opened
to avoid unsafe
conditions
according to Sec.
63.5505(d).
------------------------------------------------------------------------
[[Page 47399]]
0
20. Table 10 to Subpart UUUU is revised to read as follows:
Table 10 to Subpart UUUU of Part 63--Applicability of General
Provisions to Subpart UUUU
As required in Sec. Sec. 63.5515(h) and 63.5600, you must comply
with the appropriate General Provisions requirements specified in the
following table:
----------------------------------------------------------------------------------------------------------------
Citation Subject Brief description Applies to subpart UUUU
----------------------------------------------------------------------------------------------------------------
Sec. 63.1....................... Applicability........ Initial applicability Yes.
determination;
applicability after
standard established;
permit requirements;
extensions, notifications.
Sec. 63.2....................... Definitions.......... Definitions for part 63 Yes
standards.
Sec. 63.3....................... Units and Units and abbreviations Yes.
Abbreviations. for part 63 standards.
Sec. 63.4....................... Prohibited Activities Prohibited activities; Yes.
and Circumvention. compliance date;
circumvention,
severability.
Sec. 63.5....................... Preconstruction Preconstruction review Yes.
Review and requirements of section
Notification 112(i)(1).
Requirements.
Sec. 63.6(a).................... Applicability........ General provisions apply Yes.
unless compliance
extension; general
provisions apply to area
sources that become major.
Sec. 63.6(b)(1) through (4)..... Compliance Dates for Standards apply at Yes.
New and effective date; 3 years
Reconstructed after effective date;
sources. upon startup; 10 years
after construction or
reconstruction commences
for CAA section 112(f).
Sec. 63.6(b)(5)................. Notification......... Must notify if commenced Yes.
construction or
reconstruction after
proposal.
Sec. 63.6(b)(6)................. [Reserved]...........
Sec. 63.6(b)(7)................. Compliance Dates for Area sources that become Yes.
New and major must comply with
Reconstructed Area major source and
Sources That Become standards immediately
Major. upon becoming major,
regardless of whether
required to comply when
they were an area source.
Sec. 63.6(c)(1) and (2)......... Compliance Dates for Comply according to date Yes.
Existing Sources. in subpart, which must be
no later than 3 years
after effective date; for
CAA section 112(f)
standards, comply within
90 days of effective date
unless compliance
extension.
Sec. 63.6(c)(3) and (4)......... [Reserved]...........
Sec. 63.6(c)(5)................. Compliance Dates for Area sources that become Yes.
Existing Area major must comply with
Sources That Become major source standards by
Major. date indicated in subpart
or by equivalent time
period (e.g., 3 years).
Sec. 63.6(d).................... [Reserved]...........
Sec. 63.6(e)(1)(i).............. General Duty to You must operate and No, for new or
Minimize Emissions.. maintain affected source reconstructed sources
in a manner consistent which commenced
with safety and good air construction or
pollution control reconstruction after
practices for minimizing September 9, 2019, see
emissions. Sec. 63.5515 for
general duty
requirement. Yes, for
all other affected
sources before [DATE 181
DAYS AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER], and No
thereafter.
Sec. 63.6(e)(1)(ii)............. Requirement to You must correct No, for new or
Correct Malfunctions malfunctions as soon as reconstructed sources
ASAP. practicable after their which commenced
occurrence. construction or
reconstruction after
September 9, 2019. Yes,
for all other affected
sources before [DATE 181
DAYS AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER], and No
thereafter.
Sec. 63.6(e)(1)(iii)............ Operation and Operation and maintenance Yes.
Maintenance requirements are
Requirements. enforceable independent
of emissions limitations
or other requirements in
relevant standards.
Sec. 63.6(e)(2)................. [Reserved]...........
[[Page 47400]]
Sec. 63.6(e)(3)................. Startup, Shutdown, Requirement for startup, No, for new or
and Malfunction Plan. shutdown, and malfunction reconstructed sources
and SSM plan; content of which commenced
SSM plan. construction or
reconstruction after
September 9, 2019. Yes,
for all other affected
sources before [DATE 181
DAYS AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER], and No
thereafter.
Sec. 63.6(f)(1)................. SSM Exemption........ You must comply with No, for new or
emission standards at all reconstructed sources
times except during SSM. which commenced
construction or
reconstruction after
September 9, 2019. Yes,
for all other affected
sources before [DATE 181
DAYS AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER], and No
thereafter.
Sec. 63.6(f)(2) and (3)......... Methods for Compliance based on Yes.
Determining performance test,
Compliance/Finding operation and maintenance
of Compliance. plans, records,
inspection.
Sec. 63.6(g)(1) through (3)..... Alternative Standard. Procedures for getting an Yes.
alternative standard.
Sec. 63.6(h)(1)................. SSM Exemption........ You must comply with No, for new or
opacity and visible reconstructed sources
emission standards at all which commenced
times except during SSM. construction or
reconstruction after
September 9, 2019. Yes,
for all other affected
sources utilizing flares
before [DATE 181 DAYS
AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER], and No
thereafter.
Sec. 63.6(h)(2) through (9)..... Opacity and Visible Requirements for opacity Yes, but only for flares
Emission (VE) and visible emission for which EPA Method 22
Standards. limits. observations are
required under Sec.
63.11(b).
Sec. 63.6(i)(1) through (16).... Compliance Extension. Procedures and criteria Yes.
for Administrator to
grant compliance
extension.
Sec. 63.6(j).................... Presidential President may exempt Yes.
Compliance Exemption. source category from
requirement to comply
with subpart.
Sec. 63.7(a)(1) and (2)......... Performance Test Dates for conducting Yes.
Dates. initial performance test;
testing and other
compliance
demonstrations; must
conduct 180 days after
first subject to subpart.
Sec. 63.7(a)(3)................. Section 114 Authority Administrator may require Yes.
a performance test under
CAA Section 114 at any
time.
Sec. 63.7(b)(1)................. Notification of Must notify Administrator Yes.
Performance Test. 60 days before the test.
Sec. 63.7(b)(2)................. Notification of If rescheduling a Yes.
Rescheduling. performance test is
necessary, must notify
Administrator 5 days
before scheduled date of
rescheduled test.
Sec. 63.7(c).................... Quality Assurance and Requirement to submit site- No.
Test Plan. specific test plan 60
days before the test or
on date Administrator
agrees with; test plan
approval procedures;
performance audit
requirements; internal
and external QA
procedures for testing.
Sec. 63.7(d).................... Testing Facilities... Requirements for testing Yes.
facilities.
Sec. 63.7(e)(1)................. Performance Testing.. Performance tests must be No, see Sec. 63.5535
conducted under and Table 4.
representative
conditions; cannot
conduct performance tests
during SSM; not a
violation to exceed
standard during SSM.
Sec. 63.7(e)(2)................. Conditions for Must conduct according to Yes.
Conducting this subpart and EPA test
Performance Tests. methods unless
Administrator approves
alternative.
Sec. 63.7(e)(3)................. Test Run Duration.... Must have three test runs Yes.
of at least 1 hour each;
compliance is based on
arithmetic mean of three
runs; conditions when
data from an additional
test run can be used.
[[Page 47401]]
Sec. 63.7(f).................... Alternative Test Procedures by which Yes.
Method. Administrator can grant
approval to use an
alternative test method.
Sec. 63.7(g).................... Waiver of Tests...... Procedures for Yes.
Administrator to waive
performance test.
Sec. 63.8(a)(1)................. Applicability of Subject to all monitoring Yes.
Monitoring requirements in standard.
Requirements.
Sec. 63.8(a)(2)................. Performance Performance specifications Yes.
Specifications. in Appendix B of 40 CFR
part 60 apply.
Sec. 63.8(a)(3)................. [Reserved]...........
Sec. 63.8(a)(4)................. Monitoring with Unless your subpart says Yes.
Flares. otherwise, the
requirements for flares
in Sec. 63.11 apply.
Sec. 63.8(b)(1)................. Monitoring........... Must conduct monitoring Yes.
according to standard
unless Administrator
approves alternative.
Sec. 63.8(b)(2) and (3)......... Multiple Effluents Specific requirements for Yes.
and Multiple installing monitoring
Monitoring Systems. systems; must install on
each effluent before it
is combined and before it
is released to the
atmosphere unless
Administrator approves
otherwise; if more than
one monitoring system on
an emission point, must
report all monitoring
system results, unless
one monitoring system is
a backup.
Sec. 63.8(c)(1) and (c)(1)(i)... General Duty to Maintain monitoring system No, for new or
Minimize Emissions in a manner consistent reconstructed sources
and CMS Operation. with good air pollution which commenced
control practices. construction or
reconstruction after
September 9, 2019. Yes,
for all other affected
sources before [DATE 181
DAYS AFTER PUBLICATION
OF FINAL RULE IN THE
FEDERAL REGISTER], and
No thereafter.
Sec. 63.8(c)(1)(ii)............. Parts for Routine Keep parts for routine Yes.
Repairs. repairs readily available.
Sec. 63.8(c)(1)(iii)............ Requirements to Develop a written SSM plan No, for new or
develop SSM Plan for for CMS. reconstructed sources
CMS. which commenced
construction or
reconstruction after
September 9, 2019. Yes,
for all other affected
sources before [DATE 181
DAYS AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER], and No
thereafter.
Sec. 63.8(c)(2) and (3)......... Monitoring System Must install to get Yes.
Installation. representative emission
of parameter
measurements; must verify
operational status before
or at performance test.
Sec. 63.8(c)(4)................. Continuous Monitoring CMS must be operating No. Replaced with
System (CMS) except during breakdown, language in Sec.
Requirements. out-of control, repair, 63.5560.
maintenance, and high-
level calibration drifts.
Sec. 63.8(c)(4)(i) and (ii)..... Continuous Monitoring Continuous opacity Yes, except that Sec.
System (CMS) monitoring systems (COMS) 63.8(c)(4)(i) does not
Requirements. must have a minimum of apply because subpart
one cycle of sampling and UUUU does not require
analysis for each COMS.
successive 10-second
period and one cycle of
data recording for each
successive 6-minute
period; CEMS must have a
minimum of one cycle of
operation for each
successive 15-minute
period.
Sec. 63.8(c)(5)................. COMS Minimum COMS minimum procedures... No. Subpart UUUU does not
Procedures. require COMS.
Sec. 63.8(c)(6)................. CMS Requirements..... Zero and high level No. Replaced with
calibration check language in Sec.
requirements; out-of- 63.5545.
control periods.
Sec. 63.8(c)(7) and (8)......... CMS Requirements..... Out-of-control periods, No. Replaced with
including reporting. language in Sec.
63.5580(c)(6).
Sec. 63.8(d).................... CMS Quality Control.. Requirements for CMS No, except for
quality control, requirements in Sec.
including calibration, 63.8(d)(2).
etc.; must keep quality
control plan on record
for 5 years; keep old
versions for 5 years
after revisions; program
of correction action to
be included in plan
required under Sec.
63.8(d)(2)..
[[Page 47402]]
Sec. 63.8(e).................... CMS Performance Notification, performance Yes, except that Sec.
Evaluation. evaluation test plan, 63.8(e)(5)(ii) does not
reports. apply because subpart
UUUU does not require
COMS.
Sec. 63.8(f)(1) through (5)..... Alternative Procedures for Yes, except that no site-
Monitoring Method. Administrator to approve specific test plan is
alternative monitoring. required. The request to
use an alternative
monitoring method must
be submitted with the
notification of
performance test or CEMS
performance evaluation
or 60 days prior to any
initial compliance
demonstration.
Sec. 63.8(f)(6)................. Alternative to Procedures for Yes.
Relative Accuracy Administrator to approve
Test. alternative relative
accuracy tests for CEMS.
Sec. 63.8(g)(1) through (4)..... Data Reduction....... COMS 6-minute averages No. Replaced with
calculated over at least language in Sec.
36 evenly spaced data 63.5545(e).
points; CEMS 1-hour
averages computed over at
least four equally spaced
data points; data that
cannot be used in average.
Sec. 63.8(g)(5)................. Data Reduction....... Data that cannot be used No. Replaced with
in computing averages for language in Sec.
CEMS and COMS. 63.5560(b).
Sec. 63.9(a).................... Notification Applicability and State Yes.
Requirements. delegation.
Sec. 63.9(b)(1) through (5)..... Initial Notifications Submit notification Yes.
subject 120 days after
effective date;
notification of intent to
construct or reconstruct;
notification of
commencement of
construction or
reconstruction;
notification of startup;
contents of each.
Sec. 63.9(c).................... Request for Can request if cannot Yes.
Compliance Extension. comply by date or if
installed BACT/LAER.
Sec. 63.9(d).................... Notification of For sources that commence Yes.
Special Compliance construction between
Requirements for New proposal and promulgation
Source. and want to comply 3
years after effective
date.
Sec. 63.9(e).................... Notification of Notify Administrator 60 Yes.
Performance Test. days prior.
Sec. 63.9(f).................... Notification of VE or Notify Administrator 30 Yes, but only for flares
Opacity Test. days prior. for which EPA Method 22
observations are
required as part of a
flare compliance
assessment.
Sec. 63.9(g).................... Additional Notification of Yes, except that Sec.
Notifications When performance evaluation; 63.9(g)(2) does not
Using CMS. notification using COMS apply because subpart
data; notification that UUUU does not require
exceeded criterion for COMS.
relative accuracy.
Sec. 63.9(h)(1) through (6)..... Notification of Contents; due 60 days Yes.
Compliance Status after end of performance
Report. test or other compliance
demonstration, except for
opacity or VE, which are
due 30 days after; when
to submit to Federal vs.
State authority.
Sec. 63.9(i).................... Adjustment of Procedures for
Submittal Deadlines. Administrator to approve
change in when
notifications must be
submitted.
Sec. 63.9(j).................... Change in Previous Must submit within 15 days Yes, except that the
Information. after the change. notification must be
submitted as part of the
next semiannual
compliance report, as
specified in Table 8 to
this subpart.
Sec. 63.10(a)................... Recordkeeping and Applies to all, unless Yes.
Reporting. compliance extension;
when to submit to Federal
vs. State authority;
procedures for owners of
more than one source.
Sec. 63.10(b)(1)................ Recordkeeping and General requirements; keep Yes.
Reporting. all records readily
available; keep for 5
years.
Sec. 63.10(b)(2)(i)............. Recordkeeping of Records of occurrence and No, for new or
Occurrence and duration of each startup reconstructed sources
Duration of Startups or shutdown that causes which commenced
and Shutdowns. source to exceed emission construction or
limitation. reconstruction after
September 9, 2019. Yes,
for all other affected
sources before [DATE 181
DAYS AFTER PUBLICATION
OF FINAL RULE IN THE
FEDERAL REGISTER], and
No thereafter.
[[Page 47403]]
Sec. 63.10(b)(2)(ii)............ Recordkeeping of Records of occurrence and No, see Table 9 for
Failures to Meet a duration of each recordkeeping of (1)
Standard. malfunction of operation date, time and duration;
or air pollution control (2) listing of affected
and monitoring equipment. source or equipment, and
an estimate of the
quantity of each
regulated pollutant
emitted over the
standard; and (3)
actions to minimize
emissions and correct
the failure.
Sec. 63.10(b)(2)(iii)........... Maintenance Records.. Records of maintenance Yes.
performed on air
pollution control and
monitoring equipment.
Sec. 63.10(b)(2)(iv) and (v).... Actions Taken to Records of actions taken No, for new or
Minimize Emissions during SSM to minimize reconstructed sources
During SSM. emissions. which commenced
construction or
reconstruction after
September 9, 2019. Yes,
for all other affected
sources before [DATE 181
DAYS AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER], and No
thereafter.
Sec. 63.10(b)(2)(vi), (x), and CMS Records.......... Malfunctions, inoperative, Yes.
(xi). out-of-control;
calibration checks,
adjustments, maintenance.
Sec. 63.10(b)(2)(vii) through Records.............. Measurements to Yes, including results of
(ix). demonstrate compliance EPA Method 22
with emission limits; observations required as
performance test, part of a flare
performance evaluation, compliance assessment.
and opacity/VE
observation results;
measurements to determine
conditions of performance
tests and performance
evaluations.
Sec. 63.10(b)(2)(xii)........... Records.............. Records when under waiver. Yes.
Sec. 63.10(b)(2)(xiii).......... Records.............. Records when using Yes.
alternative to relative
accuracy test.
Sec. 63.10(b)(2)(xiv)........... Records.............. All documentation Yes.
supporting Initial
Notification and
Notification of
Compliance Status Report.
Sec. 63.10(b)(3)................ Records.............. Applicability Yes.
determinations.
Sec. 63.10(c)(1) through (6), Records.............. Additional records for CMS Yes.
(9) through (14).
Sec. 63.10(c)(7) and (8)........ Records.............. Records of excess No. Replaced with
emissions and parameter language in Table 9 to
monitoring exceedances this subpart.
for CMS.
Sec. 63.10(c)(15)............... Use of SSM Plan...... Use SSM plan to satisfy No, for new or
recordkeeping reconstructed sources
requirements for which commenced
identification of construction or
malfunction, correction reconstruction after
action taken, and nature September 9, 2019. Yes,
of repairs to CMS. for all other affected
sources before [DATE 181
DAYS AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER], and No
thereafter.
Sec. 63.10(d)(1)................ General Reporting Requirement to report..... Yes.
Requirements.
Sec. 63.10(d)(2)................ Report of Performance When to submit to Federal Yes, except that Table 7
Test Results. or State authority. to this subpart
specifies the submittal
date for the
Notification of
Compliance Status
Report.
Sec. 63.10(d)(3)................ Reporting Opacity or What to report and when... Yes, but only for flares
VE Observations. for which EPA Method 22
observations are
required as part of a
flare compliance
assessment.
Sec. 63.10(d)(4)................ Progress Reports..... Must submit progress Yes.
reports on schedule if
under compliance
extension.
Sec. 63.10(d)(5)(i)............. Periodic SSM Reports. Contents and submission of No, for new or
periodic SSM reports. reconstructed sources
which commenced
construction or
reconstruction after
September 9, 2019. Yes,
for all other affected
sources before [DATE 181
DAYS AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER], and No
thereafter. See Sec.
63.5580(c)(4) and Table
8 for malfunction
reporting requirements.
[[Page 47404]]
Sec. 63.10(d)(5)(ii)............ Immediate SSM Reports Contents and submission of No, for new or
immediate SSM reports. reconstructed sources
which commenced
construction or
reconstruction after
September 9, 2019. Yes,
for all other affected
sources before [DATE 181
DAYS AFTER DATE OF
PUBLICATION OF FINAL
RULE IN THE FEDERAL
REGISTER] except that
the immediate SSM report
must be submitted as
part of the next
semiannual compliance
report, as specified in
Table 8 to this subpart,
and No thereafter.
Sec. 63.10(e)(1) and (2)........ Additional CMS Must report results for Yes, except that Sec.
Reports. each CEMS on a unit; 63.10(e)(2)(ii) does not
written copy of apply because subpart
performance evaluation; UUUU does not require
three copies of COMS COMS.
performance evaluation.
Sec. 63.10(e)(3)(i) through Reports.............. Schedule for reporting No. Replaced with
(iii). excess emissions and language in Sec.
parameter monitor 63.5580.
exceedance (now defined
as deviations).
Sec. 63.10(e)(3)(iv)............ Excess Emissions Requirement to revert to No. Replaced with
Reports. quarterly submission if language in Sec.
there is an excess 63.5580.
emissions and parameter
monitor exceedance (now
defined as deviations);
provision to request
semiannual reporting
after compliance for 1
year; submit report by
30th day following end of
quarter or calendar half;
if there has not been an
exceedance or excess
emission (now defined as
deviations), report
contents is a statement
that there have been no
deviations.
Sec. 63.10(e)(3)(v)............. Excess Emissions Must submit report No. Replaced with
Reports. containing all of the language in Sec.
information in Sec. 63.5580.
63.10(c)(5) through (13),
Sec. 63.8(c)(7) and (8).
Sec. 63.10(e)(3)(vi) through Excess Emissions Requirements for reporting No. Replaced with
(viii). Report and Summary excess emissions for CMS language in Sec.
Report. (now called deviations); 63.5580.
requires all of the
information in Sec.
63.10(c)(5) through (13),
Sec. 63.8(c)(7) and (8).
Sec. 63.10(e)(4)................ Reporting COMS Data.. Must submit COMS data with No. Subpart UUUU does not
performance test data. require COMS.
Sec. 63.10(f)................... Waiver for Procedures for Yes.
Recordkeeping or Administrator to waive.
Reporting.
Sec. 63.11...................... Control and Work Requirements for flares Yes.
Practice and alternative work
Requirements. practice for equipment
leaks.
Sec. 63.12...................... State Authority and State authority to enforce Yes.
Delegations. standards.
Sec. 63.13...................... Addresses............ Addresses where reports, Yes.
notifications, and
requests are sent.
Sec. 63.14...................... Incorporations by Test methods incorporated Yes.
Reference. by reference.
Sec. 63.15...................... Availability of Public and confidential Yes.
Information and information.
Confidentiality.
Sec. 63.16...................... Performance Track Requirements for Yes.
Provisions. Performance Track member
facilities.
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[FR Doc. 2019-18330 Filed 9-6-19; 8:45 am]
BILLING CODE 6560-50-P