Air Plan Approval; TN: Redesignation of the Sumner County 2010 Sulfur Dioxide Unclassifiable Area, 12892-12895 [2021-04406]
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Federal Register / Vol. 86, No. 42 / Friday, March 5, 2021 / Proposed Rules
provisions of the Act and applicable
federal regulations. 42 U.S.C. 7410(k);
40 CFR 52.02(a). Thus, in reviewing SIP
submissions, the EPA’s role is to
approve state choices, provided that
they meet the criteria of the Clean Air
Act. Accordingly, this proposed action
merely proposes to approve state law as
meeting federal requirements and does
not impose additional requirements
beyond those imposed by state law. For
that reason, this proposed action:
• Is not a ‘‘significant regulatory
action’’ subject to review by the Office
of Management and Budget under
Executive Orders 12866 (58 FR 51735,
October 4, 1993) and 13563 (76 FR 3821,
January 21, 2011);
• Does not impose an information
collection burden under the provisions
of the Paperwork Reduction Act (44
U.S.C. 3501 et seq.);
• Is certified as not having a
significant economic impact on a
substantial number of small entities
under the Regulatory Flexibility Act (5
U.S.C. 601 et seq.);
• Does not contain any unfunded
mandate or significantly or uniquely
affect small governments, as described
in the Unfunded Mandates Reform Act
of 1995 (Pub. L. 104–4);
• Does not have federalism
implications as specified in Executive
Order 13132 (64 FR 43255, August 10,
1999);
• Is not an economically significant
regulatory action based on health or
safety risks subject to Executive Order
13045 (62 FR 19885, April 23, 1997);
• Is not a significant regulatory action
subject to Executive Order 13211 (66 FR
28355, May 22, 2001);
• Is not subject to requirements of
Section 12(d) of the National
Technology Transfer and Advancement
Act of 1995 (15 U.S.C. 272 note) because
application of those requirements would
be inconsistent with the Clean Air Act;
and
• Does not provide the EPA with the
discretionary authority to address
disproportionate human health or
environmental effects with practical,
appropriate, and legally permissible
methods under Executive Order 12898
(59 FR 7629, February 16, 1994).
In addition, the SIP is not approved
to apply on any Indian reservation land
or in any other area where the EPA or
an Indian tribe has demonstrated that a
tribe has jurisdiction. In those areas of
Indian country, the rule does not have
tribal implications and will not impose
substantial direct costs on tribal
governments or preempt tribal law as
specified by Executive Order 13175 (65
FR 67249, November 9, 2000).
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List of Subjects in 40 CFR Part 52
Environmental protection, Air
pollution control, Incorporation by
reference, Intergovernmental relations,
Nitrogen dioxide, Ozone, Reporting and
recordkeeping requirements, Volatile
organic compounds.
Authority: 42 U.S.C. 7401 et seq.
Dated: February 23, 2021.
Deborah Jordan,
Acting Regional Administrator, Region IX.
[FR Doc. 2021–04387 Filed 3–4–21; 8:45 am]
BILLING CODE 6560–50–P
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 81
[EPA–R04–OAR–2020–0482; FRL–10019–
57–Region 4]
Air Plan Approval; TN: Redesignation
of the Sumner County 2010 Sulfur
Dioxide Unclassifiable Area
Environmental Protection
Agency (EPA).
ACTION: Proposed rule.
AGENCY:
The Environmental Protection
Agency (EPA) is proposing to approve a
State Implementation Plan (SIP)
revision submitted by the State of
Tennessee, through the Tennessee
Department of Environment and
Conservation (TDEC), on September 29,
2020, to redesignate the Sumner County,
Tennessee unclassifiable area
(hereinafter referred to as the ‘‘Sumner
County Area’’ or ‘‘Area’’) to attainment/
unclassifiable for the 2010 1-hour
primary sulfur dioxide (SO2) national
ambient air quality standard (hereinafter
referred to as the ‘‘2010 SO2 1-hour
NAAQS’’). EPA now has sufficient
information to determine that the
Sumner County Area is attaining the
2010 1-hour SO2 NAAQS and, therefore,
is proposing to approve the State’s
request and redesignate the Area to
attainment/unclassifiable for the 2010 1hour SO2 NAAQS.
DATES: Comments must be received on
or before April 5, 2021.
ADDRESSES: Submit your comments,
identified by Docket ID No. EPA–R04–
OAR–2020–0482 at https://
www.regulations.gov. Follow the online
instructions for submitting comments.
Once submitted, comments cannot be
edited or removed from Regulations.gov.
EPA may publish any comment received
to its public docket. Do not submit
electronically any information you
consider to be Confidential Business
Information (CBI) or other information
SUMMARY:
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whose disclosure is restricted by statute.
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. EPA will generally
not consider comments or comment
contents located outside of the 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://www2.epa.gov/dockets/
commenting-epa-dockets.
FOR FURTHER INFORMATION CONTACT:
Evan Adams, Air Regulatory
Management Section, Air Planning and
Implementation Branch, Air and
Radiation Division, U.S. Environmental
Protection Agency, Region 4, 61 Forsyth
Street SW, Atlanta, Georgia 30303–8960.
Mr. Adams can be reached by telephone
at (404) 562–9009 or via electronic mail
at adams.evan@epa.gov.
SUPPLEMENTARY INFORMATION:
I. Background
The Clean Air Act (CAA or Act)
establishes a process for air quality
management through the establishment
and implementation of the national
ambient air quality standards (NAAQS).
On June 2, 2010, EPA revised the
primary SO2 NAAQS, establishing a
new 1-hour SO2 standard of 75 parts per
billion (ppb). See 75 FR 35520 (June 22,
2010).1 After the promulgation of a new
or revised NAAQS, EPA is required to
designate all areas of the country,
pursuant to section 107(d)(1)–(2) of the
CAA. For the 2010 1-hour SO2 NAAQS,
designations were based on EPA’s
application of the nationwide analytical
approach to, and technical assessment
of, the weight of evidence for each area,
including but not limited to available air
quality monitoring data and air quality
modeling results. In advance of
designating the Sumner County Area,
EPA issued updated designations
guidance through a March 20, 2015,
memorandum from Stephen D. Page,
Director, U.S. EPA, Office of Air Quality
Planning and Standards, to Air Division
Directors, U.S. EPA Regions 1–10 titled,
‘‘Updated Guidance for Area
Designations for the 2010 Primary
Sulfur Dioxide National Ambient Air
Quality Standard,’’ which contained the
1 On February 25, 2019 (effective April 17, 2019),
based on a review of the full body of currently
available scientific evidence and exposure/risk
information, EPA issued a decision to retain the
existing NAAQS for SO2. See 84 FR 9866.
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factors that EPA evaluated in
determining the appropriate
designations and associated boundaries
when designating the Sumner County
Area, including: (1) Air quality
characterization via ambient monitoring
or dispersion modeling results; (2)
emissions-related data; (3) meteorology;
(4) geography and topography; and (5)
jurisdictional boundaries.2 3 The
guidance also referenced EPA’s nonbinding Monitoring Technical
Assistance Document (Monitoring TAD)
and Modeling Technical Assistance
Document (Modeling TAD),4 which
contain scientifically sound
recommendations on how air agencies
should conduct such monitoring or
modeling.
EPA completed the first set of initial
area designations for the 2010 1-hour
SO2 NAAQS in 2013 (Round 1).
Pursuant to a March 2, 2015, consent
decree and court-ordered schedule,5
EPA finalized a second set of initial area
designations for the 2010 1-hour SO2
NAAQS in 2016 (Round 2). The March
2, 2015, consent decree identified the
following emissions criteria such that
EPA must designate, in Round 2, an area
surrounding any stationary source
which had: (a) annual emissions in 2012
exceeding 16,000 tons of SO2, or (b)
both an annual average emissions rate of
at least 0.45 pounds of SO2 per one
million British thermal units, according
to EPA’s Clean Air Markets Division
Database, and annual emissions of at
least 2,600 tons of SO2 in 2012. Sumner
County, Tennessee contained one
source, Tennessee Valley Authority
(TVA) Gallatin Fossil Plant (TVA
Gallatin), that met these Round 2
criteria. EPA evaluated the Area, using
the five factors identified previously,
during the Round 2 designations. This
evaluation is discussed further in
Section III of this notice. TVA Gallatin
is located in north-central Tennessee in
the southern portion of Sumner County,
2 The 2015 memorandum is available at https://
www.epa.gov/sites/production/files/2016-04/
documents/20150320so2designations.pdf.
3 This designation guidance has since been
supplemented by a July 22, 2016, designation
guidance memorandum from Stephen D. Page,
Director, U.S. EPA, Office of Air Quality Planning
and Standards, to Regional Air Division Directors,
U.S. EPA Regions 1–10. The 2016 memorandum is
available at https://www.epa.gov/sites/production/
files/2016-07/documents/areadesign.pdf.
4 ‘‘Sulfur Dioxide (SO ) National Ambient Air
2
Quality Standards Designations Modeling Technical
Assistance Document,’’ August 2016 draft, available
at https://www.epa.gov/sites/production/files/201606/documents/so2modelingtad.pdf. EPA released
earlier drafts of this document in May 2013 and
February 2016.
5 See Sierra Club et. al. v. McCarthy, Civil Action
No. 3:13–cv–3953–SI (N.D. Cal.), and 79 FR 31325
(June 2, 2014).
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approximately 5 kilometers (km)
southeast of the center of Gallatin,
Tennessee. TVA Gallatin is a large
Electric Generating Unit that was
included in the list of facilities to be
designated pursuant to the March 2,
2015, Consent Decree.6 7
EPA’s March 20, 2015, guidance
specified the designation category
definitions to be used in the Round 2
designations. Specifically, EPA defined
a ‘‘nonattainment’’ area as an area that
EPA has determined violates the 2010 1hour SO2 NAAQS based on the most
recent three years of quality-assured,
certified ambient air quality monitoring
data or an appropriate modeling
analysis, or that EPA has determined
contributes to a violation in a nearby
area; and defined an ‘‘attainment’’ area
as an area that EPA has determined
meets the 2010 1-hour SO2 NAAQS and
does not contribute to a violation of the
NAAQS in a nearby area based on
either: (a) the most recent 3 years of
ambient air quality monitoring data
from a monitoring network in an area
that is sufficient to be compared to the
NAAQS per EPA interpretations in the
Monitoring TAD, or (b) an appropriate
modeling analysis. As discussed further
in Section III of this notice, EPA was
unable to determine whether the
Sumner County Area met the definition
of a nonattainment area or the definition
of an attainment area based on the
available information at the time of the
Round 2 designations. As a result, EPA
designated the Sumner County Area as
unclassifiable in the Round 2
designations published on July 12,
2016.8 The boundary for this
designation was the jurisdictional
boundary of Sumner County.
Detailed rationale, analyses, and other
information supporting EPA’s original
Round 2 designation for this Area can
be found in the Round 2 designation’s
technical support document (TSD) for
Tennessee. That TSD, along with all
other supporting materials for the
original 2010 1-hour SO2 NAAQS
designation for Sumner County, can be
found on EPA’s SO2 designations
website.9 In support of this proposed
6 TVA Gallatin was also subject to EPA’s 2015
Data Requirements Rule (DRR) for the 2010 SO2 1hour NAAQS. See https://www.epa.gov/sites/
production/files/2016-06/documents/tn.pdf for
Tennessee’s letter dated January 15, 2016 with the
Data Requirements Rule (DRR) source list.
7 In accordance with the DRR, 40 CFR part 51,
subpart BB, through a letter dated June 7, 2016,
Tennessee notified EPA that the State chose to
characterize peak 1-hour SO2 concentrations for
TVA Gallatin using air quality dispersion modeling.
8 See 81 FR 45039 (July 12, 2016), codified at 40
CFR 81.343.
9 EPA SO designations website can be found at
2
https://www.epa.gov/sulfur-dioxide-designations.
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redesignation action, EPA evaluated
new modeling for the Sumner County
Area provided by Tennessee and
developed a new TSD. The TSD for this
proposed action is included in the
docket.10
II. What are the criteria for
redesignating an area from
unclassifiable to attainment/
unclassifiable?
Section 107(d)(3)(A) of the CAA
provides that the Administrator may
notify the Governor of any state that the
designation of an area should be revised
‘‘on the basis of air quality data,
planning and control considerations, or
any other air quality-related
considerations the Administrator deems
appropriate.’’ 11 The Act further
provides in section 107(d)(3)(D) that
even if the Administrator has not
notified a state Governor that a
designation should be revised, the
Governor of any state may, on the
Governor’s own motion, submit a
request to revise the designation of any
area, and the Administrator must
approve or deny the request. In keeping
with CAA section 107(d)(3)(A), areas
that are redesignated to attainment/
unclassifiable 12 must meet the
requirements for attainment areas and,
thus, must meet the relevant NAAQS. In
addition, the area must not contribute to
ambient air quality in a nearby area that
does not meet the NAAQS. See the
definitions for nonattainment area,
attainment area, and unclassifiable area
in CAA section 107(d)(1)(A)(i)–(iii).
In its designations under the 2010 1hour SO2 NAAQS, EPA has generally
defined an attainment/unclassifiable
area as an area that, based on available
information including (but not limited
to) appropriate monitoring data and/or
10 The modeling files are not included in the
electronic docket for this proposed action due to
their nature, size, and incompatibility with the
Federal Docket Management System. These files are
available at the EPA Region 4 office for review. To
request these files, please contact the person listed
in the notice under the section titled FOR FURTHER
INFORMATION CONTACT.
11 While CAA section 107(d)(3)(E) also lists
specific requirements for redesignations, those
requirements only apply to redesignations of
nonattainment areas to attainment and, therefore,
are not applicable in the context of a redesignation
of an area from unclassifiable to attainment/
unclassifiable.
12 Historically, EPA has designated most areas
that do not meet the definition of nonattainment as
‘‘unclassifiable/attainment.’’ EPA has reversed the
order of the label to be ‘‘attainment/unclassifiable’’
to better convey the definition of the designation
category and so that the category is more easily
distinguished from the separate unclassifiable
category. See 83 FR 1098 (January 9, 2018) and 83
FR 25776 (June 4, 2018). EPA reserves the
‘‘attainment’’ category for when EPA redesignates a
nonattainment area that has attained the relevant
NAAQS and has an approved maintenance plan.
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modeling analyses, EPA has determined
meets the NAAQS and determined that
the available information indicates that
the area does not likely contribute to
ambient air quality in a nearby area that
does not meet the NAAQS. EPA is
proposing to find that the Sumner
County Area now meets the definition
of attainment/unclassifiable based upon
air quality dispersion modeling analyses
that demonstrates attainment, i.e., no
violations of the 2010 1-hour SO2
NAAQS and not contributing to a
nearby area that is not meeting the
NAAQS. EPA preliminarily finds this
information sufficient for the purposes
of redesignating an area from
unclassifiable to attainment/
unclassifiable. Such redesignations are
functionally similar to initial
designations and are not subject to CAA
section 107(d)(3)(E), which, amongst
other things, requires attainment to be
due to permanent and enforceable
measures and which requires a
demonstration that the area will
maintain the NAAQS for 10 years.
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III. What is EPA’s rationale for
proposing to redesignate the area?
The Sumner County Area was
designated unclassifiable by EPA on
July 12, 2016. EPA’s rationale for the
unclassifiable designation is fully
explained in the TSD associated with
that action.13 As discussed in the final
TSD, the revised modeling provided by
Tennessee in March 2016 for the final
designation action used allowable SO2
emissions rates from the TVA Gallatin
facility that had not yet been made
federally enforceable. Additionally, the
final modeling analysis did not
appropriately account for background
SO2 concentrations in the Area which
was considered inconsistent with EPA’s
Modeling TAD and modeling guidelines
in 40 CFR part 51, Appendix W.
Tennessee submitted an updated
modeling analysis with its letter signed
by Michelle Owenby, Director of TDEC’s
Division of Air Pollution Control, on
September 29, 2020, requesting that
EPA redesignate Sumner County,
Tennessee, to attainment/unclassifiable
for the 2010 1-hour SO2 NAAQS.14 This
13 The final Round 2 designations TSD can be
found at https://www.epa.gov/sites/production/
files/2016-07/documents/r4_tn_final_designation_
tsd_06302016.pdf.
14 The demonstration of attainment through air
quality dispersion modeling requires an area to
review and report annual SO2 emissions pursuant
to DRR ongoing verification at 40 CFR 51.1205(b).
In its September 29, 2020, redesignation request
letter, Tennessee also requested to terminate the
section 51.1205(b) annual reporting requirement
because the modeling analyses demonstrated a
value of at least 50 percent below the 2010 1-hour
SO2 NAAQS at all receptors. EPA will address the
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updated modeling was performed using
the current version of EPA’s
recommended dispersion model,
AERMOD version 19191, with the most
recent three years of actual SO2
emissions (2017–2019) from the TVA
Gallatin facility and concurrent
meteorology data. Additionally, the
updated modeling used recent 2016
land cover data and appropriately
accounted for background SO2
concentrations in the Area. The TSD
included in the docket for this proposed
redesignation action provides a detailed
summary of Tennessee’s modeling
analysis and EPA’s evaluation of the
modeling.
According to EPA’s guidance on
redesignations, SO2 nonattainment areas
using modeling to demonstrate
attainment for a redesignation request
are expected to use maximum allowable
emissions.15 However, this statement
derives from the requirements of CAA
section 107(d)(3)(E), which applies only
to the redesignation of nonattainment
areas to attainment. For redesignations
of unclassifiable areas, the necessary
analysis is equivalent to what would be
required in a designation in the first
instance since EPA has not found the
area to be attainment or nonattainment.
In this first instance, the goal is to
characterize existing ambient air
quality. As such, it is appropriate to use
actual emissions for estimating existing
air quality. EPA’s acceptance of
modeling using actual emissions in this
instance should not be construed to
define what would be needed for a
demonstration of attainment and
maintenance for purposes of a
redesignation of a nonattainment area to
attainment.
After reviewing Tennessee’s request
under CAA section 107(d)(3)(D) and all
available information, EPA is proposing
to find that the modeling provided by
the State comports with EPA’s current
Modeling TAD and EPA’s Guideline on
Air Quality Models (40 CFR part 51
Appendix W) and is acceptable for
assessing the attainment status of the
Sumner County Area. The State’s
modeling indicates that the predicted
maximum design value at any receptor
in the modeling domain is 60.5
annual reporting termination request in a separate
action which has no bearing on the proposed
approval of the redesignation.
15 ‘‘Guidance for 1-Hour SO Nonattainment Area
2
SIP Submissions,’’ April 2014, at 67, available at
https://www.epa.gov/sites/production/files/201606/documents/20140423guidance_nonattainment_
sip.pdf; ‘‘Use of Actual Emissions in Maintenance
Demonstrations for Ozone and Carbon Monoxide
(CO) Nonattainment Areas,’’ November 1993, at 3,
available at https://www3.epa.gov/ttn/naaqs/
aqmguide/collection/cp2/19931130_berry_actual_
emissions_ozone_co_maintenance_demos%20.pdf.
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micrograms per cubic meter (mg/m3), or
23.1 ppb.16 EPA’s review confirms that
the modeling results appropriately
characterize the air quality in the
Sumner County Area that predicted
ambient SO2 concentrations are below
the 2010 1-hour SO2 NAAQS of 196.4
mg/m3, or 75 ppb.17 Additionally, there
is no evidence of monitored or modeled
violations in the surrounding counties
such that the source is contributing to
any nearby area that does not meet the
NAAQS. EPA is therefore proposing to
approve Tennessee’s redesignation
request and proposing to redesignate the
entirety of Sumner County that was
designated as unclassifiable in July 2016
to attainment/unclassifiable based on
the currently available information that
demonstrates attainment of the 2010 1hour SO2 NAAQS.
IV. Proposed Action
EPA is proposing to approve
Tennessee’s September 29, 2020,
redesignation request and to redesignate
the Sumner County Area from
unclassifiable to attainment/
unclassifiable for the 2010 1-hour SO2
NAAQS. EPA has reviewed the
modeling provided by the State with its
redesignation request and preliminarily
finds that it complies with EPA’s
current Modeling TAD and EPA’s
Guideline on Air Quality Models (40
CFR part 51 Appendix W) and is
acceptable for assessing the attainment
status of the Sumner County Area. If
finalized, approval of the redesignation
request would change the legal
designation, found at 40 CFR part 81, of
Sumner County from unclassifiable to
attainment/unclassifiable for the 2010 1hour SO2 NAAQS.
V. Statutory and Executive Order
Reviews
Under the CAA, redesignation of an
area to attainment/unclassifiable is an
action that affects the status of a
geographical area and does not impose
any additional regulatory requirements
on sources beyond those imposed by
state law. A redesignation to attainment/
unclassifiable does not create any new
requirements. Accordingly, this
proposed action merely proposes to
redesignate an area to attainment/
unclassifiable and does not impose
additional requirements. For that
reason, this proposed action:
16 The SO NAAQS and the design value
2
compared to the NAAQS is the 3-year average of the
annual 99th percentile of 1-hour daily maximum
concentrations.
17 See the TSD in the docket for this proposed
action for further information and analysis of the
updated modeling.
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• Is not a significant regulatory action
subject to review by the Office of
Management and Budget under
Executive Orders 12866 (58 FR 51735,
October 4, 1993) and 13563 (76 FR 3821,
January 21, 2011);
• Does not impose an information
collection burden under the provisions
of the Paperwork Reduction Act (44
U.S.C. 3501 et seq.);
• Is certified as not having a
significant economic impact on a
substantial number of small entities
under the Regulatory Flexibility Act
(5 U.S.C. 601 et seq.);
• Does not contain any unfunded
mandate or significantly or uniquely
affect small governments, as described
in the Unfunded Mandates Reform Act
of 1995 (Pub. L. 104–4);
• Does not have Federalism
implications as specified in Executive
Order 13132 (64 FR 43255, August 10,
1999);
• Is not an economically significant
regulatory action based on health or
safety risks subject to Executive Order
13045 (62 FR 19885, April 23, 1997);
• Is not a significant regulatory action
subject to Executive Order 13211 (66 FR
28355, May 22, 2001);
• Is not subject to requirements of
Section 12(d) of the National
Technology Transfer and Advancement
Act of 1995 (15 U.S.C. 272 note) because
application of those requirements would
be inconsistent with the CAA; and
• Will not have disproportionate
human health or environmental effects
under Executive Order 12898 (59 FR
7629, February 16, 1994).
This proposed action does not apply
on any Indian reservation land or in any
other area where EPA or an Indian tribe
has demonstrated that a tribe has
jurisdiction. In those areas of Indian
country, this proposed action does not
have tribal implications as specified by
Executive Order 13175 (65 FR 67249,
November 9, 2000), nor will it impose
substantial direct costs on tribal
governments or preempt tribal law.
jbell on DSKJLSW7X2PROD with PROPOSALS
List of Subjects in 40 CFR Part 81
Environmental protection, Air
pollution control.
Authority: 42 U.S.C. 7401 et seq.
Dated: February 25, 2021.
John Blevins,
Acting Regional Administrator, Region 4.
[FR Doc. 2021–04406 Filed 3–4–21; 8:45 am]
BILLING CODE 6560–50–P
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ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 271
[EPA–R09–RCRA–2019–0491; FRL–10019–
33–Region 9]
California: Authorization of State
Hazardous Waste Management
Program Revisions
Environmental Protection
Agency (EPA).
ACTION: Proposed rule; correction.
AGENCY:
The Environmental Protection
Agency (EPA) approved revisions to
California’s federally authorized
hazardous waste program by publishing
proposed and final rules in the Federal
Register on October 18, 2019 and
January 14, 2020, respectively. The
notice for the proposed rule
inadvertently and unintentionally left
out citations for approving the State’s
authority to adopt additional waste
streams as universal wastes in the State
Analogues to the Federal Program table.
In addition, the scope of the State
program that is considered ‘‘broader in
scope’’ than the federal program was
mis-designated. We are proposing to
correct these and related errors. EPA
seeks public comment prior to taking
final action.
DATES: Comments on this proposed
correction must be received by April 5,
2021.
ADDRESSES: Submit your comments,
identified by Docket ID No. EPA–R09–
RCRA–2019–0491, at https://
www.regulations.gov. Follow the online
instructions for submitting comments.
Once submitted, comments cannot be
edited or removed from Regulations.gov.
EPA may publish any comment received
to its public docket. Do not submit
electronically any information you
consider to be Confidential Business
Information (CBI) or other information
whose disclosure is restricted by statute.
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. EPA will generally
not consider comments or comment
contents located outside of the 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://www2.epa.gov/dockets/
commenting-epa-dockets.
SUMMARY:
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12895
FOR FURTHER INFORMATION CONTACT:
Laurie Amaro, EPA Region 9, 75
Hawthorne St., San Francisco, CA
94105. By phone: (415) 972–3364 or by
email at Amaro.Laurie@epa.gov.
SUPPLEMENTARY INFORMATION:
A. Why are corrections to the revised
state program authorization necessary?
States that have received final
authorization from EPA under the
Resource Conservation and Recovery
Act (RCRA) § 3006(b), 42 U.S.C. 6926(b),
must maintain a hazardous waste
program that is equivalent to, consistent
with, and no less stringent than the
federal program. As the federal program
changes, states must change their
programs and ask EPA to authorize the
changes. EPA’s Federal Register notices
regarding proposed and final
authorization of revisions to state
hazardous waste management programs
provide the public with an opportunity
to comment and also offer details with
respect to the scope of the revised
program authorizations on which both
the general public and the regulated
community may rely. Where these
notices omit critical information or fail
to clearly delineate the scope of
authorized program revisions,
corrections may be necessary and/or
appropriate.
B. What corrections is EPA making to
this rule?
After proposing updates to
California’s authorized hazardous waste
program on October 18, 2019 (80 FR
55871), EPA authorized changes to
California’s hazardous waste program
on January 14, 2020 (85 FR 2038). EPA
is now proposing to correct the updated
authorization by clarifying that: (1)
California is authorized to add federallyregulated hazardous waste streams to its
universal waste program and the
requirements that California establishes
to manage such added waste streams are
federally enforceable, whether they are
added to California’s universal waste
program prior to or after EPA’s
authorization of the State’s universal
waste program; (2) State universal waste
requirements that apply to non-RCRA
wastes designated by California as
‘‘hazardous waste,’’ also known as
‘‘non-RCRA hazardous waste,’’ are
beyond the scope of the federal program
and are not being authorized; and,
similarly, (3) other wastes that are
sometimes federally-regulated
hazardous waste and sometimes nonRCRA hazardous waste under California
law, are part of the federally authorized
program, but only insofar as these
materials constitute federally-regulated
hazardous waste. If these corrections are
E:\FR\FM\05MRP1.SGM
05MRP1
Agencies
[Federal Register Volume 86, Number 42 (Friday, March 5, 2021)]
[Proposed Rules]
[Pages 12892-12895]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-04406]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 81
[EPA-R04-OAR-2020-0482; FRL-10019-57-Region 4]
Air Plan Approval; TN: Redesignation of the Sumner County 2010
Sulfur Dioxide Unclassifiable Area
AGENCY: Environmental Protection Agency (EPA).
ACTION: Proposed rule.
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SUMMARY: The Environmental Protection Agency (EPA) is proposing to
approve a State Implementation Plan (SIP) revision submitted by the
State of Tennessee, through the Tennessee Department of Environment and
Conservation (TDEC), on September 29, 2020, to redesignate the Sumner
County, Tennessee unclassifiable area (hereinafter referred to as the
``Sumner County Area'' or ``Area'') to attainment/unclassifiable for
the 2010 1-hour primary sulfur dioxide (SO2) national
ambient air quality standard (hereinafter referred to as the ``2010
SO2 1-hour NAAQS''). EPA now has sufficient information to
determine that the Sumner County Area is attaining the 2010 1-hour
SO2 NAAQS and, therefore, is proposing to approve the
State's request and redesignate the Area to attainment/unclassifiable
for the 2010 1-hour SO2 NAAQS.
DATES: Comments must be received on or before April 5, 2021.
ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R04-
OAR-2020-0482 at https://www.regulations.gov. Follow the online
instructions for submitting comments. Once submitted, comments cannot
be edited or removed from Regulations.gov. EPA may publish any comment
received to its public docket. Do not submit electronically any
information you consider to be Confidential Business Information (CBI)
or other information whose disclosure is restricted by statute.
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. EPA will
generally not consider comments or comment contents located outside of
the 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://www2.epa.gov/dockets/commenting-epa-dockets.
FOR FURTHER INFORMATION CONTACT: Evan Adams, Air Regulatory Management
Section, Air Planning and Implementation Branch, Air and Radiation
Division, U.S. Environmental Protection Agency, Region 4, 61 Forsyth
Street SW, Atlanta, Georgia 30303-8960. Mr. Adams can be reached by
telephone at (404) 562-9009 or via electronic mail at
[email protected].
SUPPLEMENTARY INFORMATION:
I. Background
The Clean Air Act (CAA or Act) establishes a process for air
quality management through the establishment and implementation of the
national ambient air quality standards (NAAQS). On June 2, 2010, EPA
revised the primary SO2 NAAQS, establishing a new 1-hour
SO2 standard of 75 parts per billion (ppb). See 75 FR 35520
(June 22, 2010).\1\ After the promulgation of a new or revised NAAQS,
EPA is required to designate all areas of the country, pursuant to
section 107(d)(1)-(2) of the CAA. For the 2010 1-hour SO2
NAAQS, designations were based on EPA's application of the nationwide
analytical approach to, and technical assessment of, the weight of
evidence for each area, including but not limited to available air
quality monitoring data and air quality modeling results. In advance of
designating the Sumner County Area, EPA issued updated designations
guidance through a March 20, 2015, memorandum from Stephen D. Page,
Director, U.S. EPA, Office of Air Quality Planning and Standards, to
Air Division Directors, U.S. EPA Regions 1-10 titled, ``Updated
Guidance for Area Designations for the 2010 Primary Sulfur Dioxide
National Ambient Air Quality Standard,'' which contained the
[[Page 12893]]
factors that EPA evaluated in determining the appropriate designations
and associated boundaries when designating the Sumner County Area,
including: (1) Air quality characterization via ambient monitoring or
dispersion modeling results; (2) emissions-related data; (3)
meteorology; (4) geography and topography; and (5) jurisdictional
boundaries.2 3 The guidance also referenced EPA's non-
binding Monitoring Technical Assistance Document (Monitoring TAD) and
Modeling Technical Assistance Document (Modeling TAD),\4\ which contain
scientifically sound recommendations on how air agencies should conduct
such monitoring or modeling.
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\1\ On February 25, 2019 (effective April 17, 2019), based on a
review of the full body of currently available scientific evidence
and exposure/risk information, EPA issued a decision to retain the
existing NAAQS for SO2. See 84 FR 9866.
\2\ The 2015 memorandum is available at https://www.epa.gov/sites/production/files/2016-04/documents/20150320so2designations.pdf.
\3\ This designation guidance has since been supplemented by a
July 22, 2016, designation guidance memorandum from Stephen D. Page,
Director, U.S. EPA, Office of Air Quality Planning and Standards, to
Regional Air Division Directors, U.S. EPA Regions 1-10. The 2016
memorandum is available at https://www.epa.gov/sites/production/files/2016-07/documents/areadesign.pdf.
\4\ ``Sulfur Dioxide (SO2) National Ambient Air
Quality Standards Designations Modeling Technical Assistance
Document,'' August 2016 draft, available at https://www.epa.gov/sites/production/files/2016-06/documents/so2modelingtad.pdf. EPA
released earlier drafts of this document in May 2013 and February
2016.
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EPA completed the first set of initial area designations for the
2010 1-hour SO2 NAAQS in 2013 (Round 1). Pursuant to a March
2, 2015, consent decree and court-ordered schedule,\5\ EPA finalized a
second set of initial area designations for the 2010 1-hour
SO2 NAAQS in 2016 (Round 2). The March 2, 2015, consent
decree identified the following emissions criteria such that EPA must
designate, in Round 2, an area surrounding any stationary source which
had: (a) annual emissions in 2012 exceeding 16,000 tons of
SO2, or (b) both an annual average emissions rate of at
least 0.45 pounds of SO2 per one million British thermal
units, according to EPA's Clean Air Markets Division Database, and
annual emissions of at least 2,600 tons of SO2 in 2012.
Sumner County, Tennessee contained one source, Tennessee Valley
Authority (TVA) Gallatin Fossil Plant (TVA Gallatin), that met these
Round 2 criteria. EPA evaluated the Area, using the five factors
identified previously, during the Round 2 designations. This evaluation
is discussed further in Section III of this notice. TVA Gallatin is
located in north-central Tennessee in the southern portion of Sumner
County, approximately 5 kilometers (km) southeast of the center of
Gallatin, Tennessee. TVA Gallatin is a large Electric Generating Unit
that was included in the list of facilities to be designated pursuant
to the March 2, 2015, Consent Decree.6 7
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\5\ See Sierra Club et. al. v. McCarthy, Civil Action No. 3:13-
cv-3953-SI (N.D. Cal.), and 79 FR 31325 (June 2, 2014).
\6\ TVA Gallatin was also subject to EPA's 2015 Data
Requirements Rule (DRR) for the 2010 SO2 1-hour NAAQS.
See https://www.epa.gov/sites/production/files/2016-06/documents/tn.pdf for Tennessee's letter dated January 15, 2016 with the Data
Requirements Rule (DRR) source list.
\7\ In accordance with the DRR, 40 CFR part 51, subpart BB,
through a letter dated June 7, 2016, Tennessee notified EPA that the
State chose to characterize peak 1-hour SO2
concentrations for TVA Gallatin using air quality dispersion
modeling.
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EPA's March 20, 2015, guidance specified the designation category
definitions to be used in the Round 2 designations. Specifically, EPA
defined a ``nonattainment'' area as an area that EPA has determined
violates the 2010 1-hour SO2 NAAQS based on the most recent
three years of quality-assured, certified ambient air quality
monitoring data or an appropriate modeling analysis, or that EPA has
determined contributes to a violation in a nearby area; and defined an
``attainment'' area as an area that EPA has determined meets the 2010
1-hour SO2 NAAQS and does not contribute to a violation of
the NAAQS in a nearby area based on either: (a) the most recent 3 years
of ambient air quality monitoring data from a monitoring network in an
area that is sufficient to be compared to the NAAQS per EPA
interpretations in the Monitoring TAD, or (b) an appropriate modeling
analysis. As discussed further in Section III of this notice, EPA was
unable to determine whether the Sumner County Area met the definition
of a nonattainment area or the definition of an attainment area based
on the available information at the time of the Round 2 designations.
As a result, EPA designated the Sumner County Area as unclassifiable in
the Round 2 designations published on July 12, 2016.\8\ The boundary
for this designation was the jurisdictional boundary of Sumner County.
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\8\ See 81 FR 45039 (July 12, 2016), codified at 40 CFR 81.343.
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Detailed rationale, analyses, and other information supporting
EPA's original Round 2 designation for this Area can be found in the
Round 2 designation's technical support document (TSD) for Tennessee.
That TSD, along with all other supporting materials for the original
2010 1-hour SO2 NAAQS designation for Sumner County, can be
found on EPA's SO2 designations website.\9\ In support of
this proposed redesignation action, EPA evaluated new modeling for the
Sumner County Area provided by Tennessee and developed a new TSD. The
TSD for this proposed action is included in the docket.\10\
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\9\ EPA SO2 designations website can be found at
https://www.epa.gov/sulfur-dioxide-designations.
\10\ The modeling files are not included in the electronic
docket for this proposed action due to their nature, size, and
incompatibility with the Federal Docket Management System. These
files are available at the EPA Region 4 office for review. To
request these files, please contact the person listed in the notice
under the section titled FOR FURTHER INFORMATION CONTACT.
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II. What are the criteria for redesignating an area from unclassifiable
to attainment/unclassifiable?
Section 107(d)(3)(A) of the CAA provides that the Administrator may
notify the Governor of any state that the designation of an area should
be revised ``on the basis of air quality data, planning and control
considerations, or any other air quality-related considerations the
Administrator deems appropriate.'' \11\ The Act further provides in
section 107(d)(3)(D) that even if the Administrator has not notified a
state Governor that a designation should be revised, the Governor of
any state may, on the Governor's own motion, submit a request to revise
the designation of any area, and the Administrator must approve or deny
the request. In keeping with CAA section 107(d)(3)(A), areas that are
redesignated to attainment/unclassifiable \12\ must meet the
requirements for attainment areas and, thus, must meet the relevant
NAAQS. In addition, the area must not contribute to ambient air quality
in a nearby area that does not meet the NAAQS. See the definitions for
nonattainment area, attainment area, and unclassifiable area in CAA
section 107(d)(1)(A)(i)-(iii).
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\11\ While CAA section 107(d)(3)(E) also lists specific
requirements for redesignations, those requirements only apply to
redesignations of nonattainment areas to attainment and, therefore,
are not applicable in the context of a redesignation of an area from
unclassifiable to attainment/unclassifiable.
\12\ Historically, EPA has designated most areas that do not
meet the definition of nonattainment as ``unclassifiable/
attainment.'' EPA has reversed the order of the label to be
``attainment/unclassifiable'' to better convey the definition of the
designation category and so that the category is more easily
distinguished from the separate unclassifiable category. See 83 FR
1098 (January 9, 2018) and 83 FR 25776 (June 4, 2018). EPA reserves
the ``attainment'' category for when EPA redesignates a
nonattainment area that has attained the relevant NAAQS and has an
approved maintenance plan.
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In its designations under the 2010 1-hour SO2 NAAQS, EPA
has generally defined an attainment/unclassifiable area as an area
that, based on available information including (but not limited to)
appropriate monitoring data and/or
[[Page 12894]]
modeling analyses, EPA has determined meets the NAAQS and determined
that the available information indicates that the area does not likely
contribute to ambient air quality in a nearby area that does not meet
the NAAQS. EPA is proposing to find that the Sumner County Area now
meets the definition of attainment/unclassifiable based upon air
quality dispersion modeling analyses that demonstrates attainment,
i.e., no violations of the 2010 1-hour SO2 NAAQS and not
contributing to a nearby area that is not meeting the NAAQS. EPA
preliminarily finds this information sufficient for the purposes of
redesignating an area from unclassifiable to attainment/unclassifiable.
Such redesignations are functionally similar to initial designations
and are not subject to CAA section 107(d)(3)(E), which, amongst other
things, requires attainment to be due to permanent and enforceable
measures and which requires a demonstration that the area will maintain
the NAAQS for 10 years.
III. What is EPA's rationale for proposing to redesignate the area?
The Sumner County Area was designated unclassifiable by EPA on July
12, 2016. EPA's rationale for the unclassifiable designation is fully
explained in the TSD associated with that action.\13\ As discussed in
the final TSD, the revised modeling provided by Tennessee in March 2016
for the final designation action used allowable SO2
emissions rates from the TVA Gallatin facility that had not yet been
made federally enforceable. Additionally, the final modeling analysis
did not appropriately account for background SO2
concentrations in the Area which was considered inconsistent with EPA's
Modeling TAD and modeling guidelines in 40 CFR part 51, Appendix W.
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\13\ The final Round 2 designations TSD can be found at https://www.epa.gov/sites/production/files/2016-07/documents/r4_tn_final_designation_tsd_06302016.pdf.
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Tennessee submitted an updated modeling analysis with its letter
signed by Michelle Owenby, Director of TDEC's Division of Air Pollution
Control, on September 29, 2020, requesting that EPA redesignate Sumner
County, Tennessee, to attainment/unclassifiable for the 2010 1-hour
SO2 NAAQS.\14\ This updated modeling was performed using the
current version of EPA's recommended dispersion model, AERMOD version
19191, with the most recent three years of actual SO2
emissions (2017-2019) from the TVA Gallatin facility and concurrent
meteorology data. Additionally, the updated modeling used recent 2016
land cover data and appropriately accounted for background
SO2 concentrations in the Area. The TSD included in the
docket for this proposed redesignation action provides a detailed
summary of Tennessee's modeling analysis and EPA's evaluation of the
modeling.
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\14\ The demonstration of attainment through air quality
dispersion modeling requires an area to review and report annual
SO2 emissions pursuant to DRR ongoing verification at 40
CFR 51.1205(b). In its September 29, 2020, redesignation request
letter, Tennessee also requested to terminate the section 51.1205(b)
annual reporting requirement because the modeling analyses
demonstrated a value of at least 50 percent below the 2010 1-hour
SO2 NAAQS at all receptors. EPA will address the annual
reporting termination request in a separate action which has no
bearing on the proposed approval of the redesignation.
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According to EPA's guidance on redesignations, SO2
nonattainment areas using modeling to demonstrate attainment for a
redesignation request are expected to use maximum allowable
emissions.\15\ However, this statement derives from the requirements of
CAA section 107(d)(3)(E), which applies only to the redesignation of
nonattainment areas to attainment. For redesignations of unclassifiable
areas, the necessary analysis is equivalent to what would be required
in a designation in the first instance since EPA has not found the area
to be attainment or nonattainment. In this first instance, the goal is
to characterize existing ambient air quality. As such, it is
appropriate to use actual emissions for estimating existing air
quality. EPA's acceptance of modeling using actual emissions in this
instance should not be construed to define what would be needed for a
demonstration of attainment and maintenance for purposes of a
redesignation of a nonattainment area to attainment.
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\15\ ``Guidance for 1-Hour SO2 Nonattainment Area SIP
Submissions,'' April 2014, at 67, available at https://www.epa.gov/sites/production/files/2016-06/documents/20140423guidance_nonattainment_sip.pdf; ``Use of Actual Emissions in
Maintenance Demonstrations for Ozone and Carbon Monoxide (CO)
Nonattainment Areas,'' November 1993, at 3, available at https://www3.epa.gov/ttn/naaqs/aqmguide/collection/cp2/19931130_berry_actual_emissions_ozone_co_maintenance_demos%20.pdf.
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After reviewing Tennessee's request under CAA section 107(d)(3)(D)
and all available information, EPA is proposing to find that the
modeling provided by the State comports with EPA's current Modeling TAD
and EPA's Guideline on Air Quality Models (40 CFR part 51 Appendix W)
and is acceptable for assessing the attainment status of the Sumner
County Area. The State's modeling indicates that the predicted maximum
design value at any receptor in the modeling domain is 60.5 micrograms
per cubic meter ([micro]g/m\3\), or 23.1 ppb.\16\ EPA's review confirms
that the modeling results appropriately characterize the air quality in
the Sumner County Area that predicted ambient SO2
concentrations are below the 2010 1-hour SO2 NAAQS of 196.4
[micro]g/m\3\, or 75 ppb.\17\ Additionally, there is no evidence of
monitored or modeled violations in the surrounding counties such that
the source is contributing to any nearby area that does not meet the
NAAQS. EPA is therefore proposing to approve Tennessee's redesignation
request and proposing to redesignate the entirety of Sumner County that
was designated as unclassifiable in July 2016 to attainment/
unclassifiable based on the currently available information that
demonstrates attainment of the 2010 1-hour SO2 NAAQS.
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\16\ The SO2 NAAQS and the design value compared to
the NAAQS is the 3-year average of the annual 99th percentile of 1-
hour daily maximum concentrations.
\17\ See the TSD in the docket for this proposed action for
further information and analysis of the updated modeling.
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IV. Proposed Action
EPA is proposing to approve Tennessee's September 29, 2020,
redesignation request and to redesignate the Sumner County Area from
unclassifiable to attainment/unclassifiable for the 2010 1-hour
SO2 NAAQS. EPA has reviewed the modeling provided by the
State with its redesignation request and preliminarily finds that it
complies with EPA's current Modeling TAD and EPA's Guideline on Air
Quality Models (40 CFR part 51 Appendix W) and is acceptable for
assessing the attainment status of the Sumner County Area. If
finalized, approval of the redesignation request would change the legal
designation, found at 40 CFR part 81, of Sumner County from
unclassifiable to attainment/unclassifiable for the 2010 1-hour
SO2 NAAQS.
V. Statutory and Executive Order Reviews
Under the CAA, redesignation of an area to attainment/
unclassifiable is an action that affects the status of a geographical
area and does not impose any additional regulatory requirements on
sources beyond those imposed by state law. A redesignation to
attainment/unclassifiable does not create any new requirements.
Accordingly, this proposed action merely proposes to redesignate an
area to attainment/unclassifiable and does not impose additional
requirements. For that reason, this proposed action:
[[Page 12895]]
Is not a significant regulatory action subject to review
by the Office of Management and Budget under Executive Orders 12866 (58
FR 51735, October 4, 1993) and 13563 (76 FR 3821, January 21, 2011);
Does not impose an information collection burden under the
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
Is certified as not having a significant economic impact
on a substantial number of small entities under the Regulatory
Flexibility Act (5 U.S.C. 601 et seq.);
Does not contain any unfunded mandate or significantly or
uniquely affect small governments, as described in the Unfunded
Mandates Reform Act of 1995 (Pub. L. 104-4);
Does not have Federalism implications as specified in
Executive Order 13132 (64 FR 43255, August 10, 1999);
Is not an economically significant regulatory action based
on health or safety risks subject to Executive Order 13045 (62 FR
19885, April 23, 1997);
Is not a significant regulatory action subject to
Executive Order 13211 (66 FR 28355, May 22, 2001);
Is not subject to requirements of Section 12(d) of the
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272
note) because application of those requirements would be inconsistent
with the CAA; and
Will not have disproportionate human health or
environmental effects under Executive Order 12898 (59 FR 7629, February
16, 1994).
This proposed action does not apply on any Indian reservation land
or in any other area where EPA or an Indian tribe has demonstrated that
a tribe has jurisdiction. In those areas of Indian country, this
proposed action does not have tribal implications as specified by
Executive Order 13175 (65 FR 67249, November 9, 2000), nor will it
impose substantial direct costs on tribal governments or preempt tribal
law.
List of Subjects in 40 CFR Part 81
Environmental protection, Air pollution control.
Authority: 42 U.S.C. 7401 et seq.
Dated: February 25, 2021.
John Blevins,
Acting Regional Administrator, Region 4.
[FR Doc. 2021-04406 Filed 3-4-21; 8:45 am]
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