Hexythiazox; Pesticide Tolerance for Emergency Exemptions, 73214-73218 [2014-28935]
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Federal Register / Vol. 79, No. 237 / Wednesday, December 10, 2014 / Rules and Regulations
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 180
[EPA–HQ–OPP–2014–0774; FRL–9919–69]
Hexythiazox; Pesticide Tolerance for
Emergency Exemptions
Environmental Protection
Agency (EPA).
ACTION: Final rule.
AGENCY:
This regulation establishes a
time-limited tolerance for residues of
hexythiazox in or on sugar beet root.
This action is associated with the
utilization of a crisis exemption under
the Federal Insecticide, Fungicide, and
Rodenticide Act (FIFRA) authorizing
use of the pesticide on sugar beets. This
regulation establishes a maximum
permissible level for residues of
hexythiazox in or on sugar beet root.
The time-limited tolerance expires on
December 31, 2019.
DATES: This regulation is effective
December 10, 2014. Objections and
requests for hearings must be received
on or before February 9, 2015, and must
be filed in accordance with the
instructions provided in 40 CFR part
178 (see also Unit I.C. of the
SUPPLEMENTARY INFORMATION).
ADDRESSES: The docket for this action,
identified by docket identification (ID)
number EPA–HQ–OPP–2014–0774, is
available at https://www.regulations.gov
or at the Office of Pesticide Programs
Regulatory Public Docket (OPP Docket)
in the Environmental Protection Agency
Docket Center (EPA/DC), West William
Jefferson Clinton Bldg., Rm. 3334, 1301
Constitution Ave. NW., Washington, DC
20460–0001. 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 OPP
Docket is (703) 305–5805. Please review
the visitor instructions and additional
information about the docket available
at https://www.epa.gov/dockets.
FOR FURTHER INFORMATION CONTACT:
Susan Lewis, Registration Division
(7505P), Office of Pesticide Programs,
Environmental Protection Agency, 1200
Pennsylvania Ave. NW., Washington,
DC 20460–0001; main telephone
number: (703) 305–7090; email address:
RDFRNotices@epa.gov.
SUPPLEMENTARY INFORMATION:
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SUMMARY:
I. General Information
A. Does this action apply to me?
You may be potentially affected by
this action if you are an agricultural
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producer, food manufacturer, or
pesticide manufacturer. The following
list of North American Industrial
Classification System (NAICS) codes is
not intended to be exhaustive, but rather
provides a guide to help readers
determine whether this document
applies to them. Potentially affected
entities may include:
• Crop production (NAICS code 111).
• Animal production (NAICS code
112).
• Food manufacturing (NAICS code
311).
• Pesticide manufacturing (NAICS
code 32532).
B. How can I get electronic access to
other related information?
You may access a frequently updated
electronic version of 40 CFR part 180
through the Government Printing
Office’s e-CFR site at https://
www.ecfr.gov/cgi-bin/textidx?&c=ecfr&tpl=/ecfrbrowse/Title40/
40tab_02.tpl.
C. How can I file an objection or hearing
request?
Under section 408(g) of the Federal
Food, Drug, and Cosmetic Act (FFDCA),
21 U.S.C. 346a, any person may file an
objection to any aspect of this regulation
and may also request a hearing on those
objections. You must file your objection
or request a hearing on this regulation
in accordance with the instructions
provided in 40 CFR part 178. To ensure
proper receipt by EPA, you must
identify docket ID number EPA–HQ–
OPP–2014–0774 in the subject line on
the first page of your submission. All
objections and requests for a hearing
must be in writing, and must be
received by the Hearing Clerk on or
before February 9, 2015. Addresses for
mail and hand delivery of objections
and hearing requests are provided in 40
CFR 178.25(b).
In addition to filing an objection or
hearing request with the Hearing Clerk
as described in 40 CFR part 178, please
submit a copy of the filing (excluding
any Confidential Business Information
(CBI)) for inclusion in the public docket.
Information not marked confidential
pursuant to 40 CFR part 2 may be
disclosed publicly by EPA without prior
notice. Submit the non-CBI copy of your
objection or hearing request, identified
by docket ID number EPA–HQ–OPP–
2014–0774, by one of the following
methods:
• Federal eRulemaking Portal: https://
www.regulations.gov. Follow the online
instructions for submitting comments.
Do not submit electronically any
information you consider to be CBI or
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other information whose disclosure is
restricted by statute.
• Mail: OPP Docket, Environmental
Protection Agency Docket Center (EPA/
DC), (28221T), 1200 Pennsylvania Ave.
NW., Washington, DC 20460–0001.
• Hand Delivery: To make special
arrangements for hand delivery or
delivery of boxed information, please
follow the instructions at https://
www.epa.gov/dockets/contacts.html.
Additional instructions on commenting
or visiting the docket, along with more
information about dockets generally, is
available at https://www.epa.gov/
dockets.
II. Background and Statutory Findings
EPA, on its own initiative, in
accordance with FFDCA sections 408(e)
and 408(l)(6), 21 U.S.C. 346a(e) and
346a(1)(6), is establishing a time-limited
tolerance for residues of hexythiazox
and its metabolites containing the (4chlorophenyl)-4-methyl-2-oxo-3thiazolidine moiety, calculated as the
stoichiometric equivalent of
hexythiazox, in or on sugar beet root at
0.15 parts per million (ppm). This timelimited tolerance expires on December
31, 2019.
Section 408(l)(6) of FFDCA requires
EPA to establish a time-limited
tolerance or exemption from the
requirement for a tolerance for pesticide
chemical residues in food that will
result from the use of a pesticide under
an emergency exemption granted by
EPA under FIFRA section 18. Such
tolerances can be established without
providing notice or period for public
comment. EPA does not intend for its
actions on FIFRA section 18 related
time-limited tolerances to set binding
precedents for the application of FFDCA
section 408 and the safety standard to
other tolerances and exemptions.
Section 408(e) of FFDCA allows EPA to
establish a tolerance or an exemption
from the requirement of a tolerance on
its own initiative, i.e., without having
received any petition from an outside
party.
Section 408(b)(2)(A)(i) of FFDCA
allows EPA to establish a tolerance (the
legal limit for a pesticide chemical
residue in or on a food) only if EPA
determines that the tolerance is ‘‘safe.’’
Section 408(b)(2)(A)(ii) of FFDCA
defines ‘‘safe’’ to mean that ‘‘there is a
reasonable certainty that no harm will
result from aggregate exposure to the
pesticide chemical residue, including
all anticipated dietary exposures and all
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other exposures for which there is
reliable information.’’ This includes
exposure through drinking water and in
residential settings, but does not include
occupational exposure. Section
408(b)(2)(C) of FFDCA requires EPA to
give special consideration to exposure
of infants and children to the pesticide
chemical residue in establishing a
tolerance and to ‘‘ensure that there is a
reasonable certainty that no harm will
result to infants and children from
aggregate exposure to the pesticide
chemical residue. . . .’’
Section 18 of FIFRA authorizes EPA
to exempt any Federal or State agency
from any provision of FIFRA, if EPA
determines that ‘‘emergency conditions
exist which require such exemption.’’
EPA has established regulations
governing such emergency exemptions
in 40 CFR part 166.
III. Emergency Exemption for
Hexythiazox on Sugar Beet Root and
FFDCA Tolerances
The Idaho and Oregon State
Departments of Agriculture (the States)
reported that two-spotted spider mite
infestations at above-normal levels have
caused severe losses in the past several
years in sugar beet fields. Based upon
activity observed in the early spring of
2014, they projected similar mite
population levels for the 2014 season as
well. The States claimed that alternative
controls and practices would not
provide adequate control with high
infestations and would not prevent
significant economic losses from
occurring. The States also noted concern
that some of the alternative pesticides
may be harmful to beneficial insects
which help control mites, and to bees
pollinating crops in the area. The
applicants asserted that an emergency
condition existed in accordance with
the criteria for approval of an emergency
exemption, and utilized crisis
exemptions under FIFRA section 18
which allowed the use of hexythiazox
on sugar beet root for control of twospotted spider mites in the Idaho and
Oregon. After having reviewed the
submissions, EPA concurred that an
emergency condition existed.
As part of its evaluation of the
emergency exemption applications, EPA
assessed the potential risks presented by
residues of hexythiazox in or on sugar
beet root. In doing so, EPA considered
the safety standard in FFDCA section
408(b)(2), and EPA decided that the
necessary tolerance under FFDCA
section 408(l)(6) would be consistent
with the safety standard and with
FIFRA section 18. Consistent with the
need to move quickly on the emergency
exemptions in order to address an
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urgent non-routine situation and to
ensure that the resulting food is safe and
lawful, EPA is issuing this tolerance
without notice and opportunity for
public comment as provided in FFDCA
section 408(l)(6). Although this timelimited tolerance expires on December
31, 2019, under FFDCA section
408(l)(5), residues of the pesticide not in
excess of the amount specified in the
tolerance remaining in or on sugar beet
root after that date will not be unlawful,
provided the pesticide was applied in a
manner that was lawful under FIFRA,
and the residues do not exceed a level
that was authorized by this time-limited
tolerance at the time of that application.
EPA will take action to revoke this timelimited tolerance earlier if any
experience with, scientific data on, or
other relevant information on this
pesticide indicate that the residues are
not safe.
Because this time-limited tolerance is
being approved under emergency
conditions, EPA has not made any
decisions about whether hexythiazox
meets FIFRA’s registration requirements
for use on sugar beets or whether
permanent tolerances for this use would
be appropriate. Under these
circumstances, EPA does not believe
that this time-limited tolerance decision
serves as a basis for registration of
hexythiazox by a State for special local
needs under FIFRA section 24(c). Nor
does this tolerance by itself serve as the
authority for persons in any State other
than Idaho and Oregon to use this
pesticide on sugar beets under FIFRA
section 18 absent the issuance of an
emergency exemption applicable within
that State. For additional information
regarding the emergency exemption for
hexythiazox, contact the Agency’s
Registration Division at the address
provided under FOR FURTHER
INFORMATION CONTACT.
IV. Aggregate Risk Assessment and
Determination of Safety
Section 408(b)(2)(A)(i) of FFDCA
allows EPA to establish a tolerance (the
legal limit for a pesticide chemical
residue in or on a food) only if EPA
determines that the tolerance is ‘‘safe.’’
Section 408(b)(2)(A)(ii) of FFDCA
defines ‘‘safe’’ to mean that ‘‘there is a
reasonable certainty that no harm will
result from aggregate exposure to the
pesticide chemical residue, including
all anticipated dietary exposures and all
other exposures for which there is
reliable information.’’ This includes
exposure through drinking water and in
residential settings, but does not include
occupational exposure. Section
408(b)(2)(C) of FFDCA requires EPA to
give special consideration to exposure
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of infants and children to the pesticide
chemical residue in establishing a
tolerance and to ‘‘ensure that there is a
reasonable certainty that no harm will
result to infants and children from
aggregate exposure to the pesticide
chemical residue. . . .’’
Consistent with the factors specified
in FFDCA section 408(b)(2)(D), EPA has
reviewed the available scientific data
and other relevant information in
support of this action. EPA has
sufficient data to assess the hazards of
and to make a determination on
aggregate exposure expected as a result
of these emergency exemption requests
and the time-limited tolerance for
residues of hexythiazox in or on sugar
beet root at 0.15 ppm. EPA’s assessment
of exposures and risks associated with
establishing the time-limited tolerance
follows.
A. Toxicological Points of Departure/
Levels of Concern
Once a pesticide’s toxicological
profile is determined, EPA identifies
toxicological points of departure (POD)
and levels of concern to use in
evaluating the risk posed by human
exposure to the pesticide. For hazards
that have a threshold below which there
is no appreciable risk, the toxicological
POD is used as the basis for derivation
of reference values for risk assessment.
PODs are developed based on a careful
analysis of the doses in each
toxicological study to determine the
dose at which no adverse effects are
observed (the NOAEL) and the lowest
dose at which adverse effects of concern
are identified (the LOAEL). Uncertainty/
safety factors are used in conjunction
with the POD to calculate a safe
exposure level—generally referred to as
a population-adjusted dose (PAD) or a
reference dose (RfD)—and a safe margin
of exposure (MOE). For non-threshold
risks, the Agency assumes that any
amount of exposure will lead to some
degree of risk. Thus, the Agency
estimates risk in terms of the probability
of an occurrence of the adverse effect
expected in a lifetime. For more
information on the general principles
EPA uses in risk characterization and a
complete description of the risk
assessment process, see https://
www.epa.gov/pesticides/factsheets/
riskassess.htm.
A summary of the toxicological
endpoints for hexythiazox used for
human risk assessment is discussed in
Unit III.B. of the final rule published in
the Federal Register of February 8, 2013
(78 FR 9322) (FRL–9376–9).
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B. Exposure Assessment
1. Dietary exposure from food and
feed uses. In evaluating dietary
exposure to hexythiazox, EPA
considered exposure under the timelimited tolerance established by this
action as well as all existing
hexythiazox tolerances in 40 CFR
180.448. EPA assessed dietary
exposures from hexythiazox in food as
follows:
i. Acute exposure. No adverse acute
effects were identified in the
toxicological studies for hexythiazox;
therefore, a quantitative acute dietary
exposure assessment is unnecessary.
ii. Chronic exposure. In conducting
the chronic dietary exposure assessment
EPA used the food consumption data
from the U.S. Department of
Agriculture’s 2003–2008 National
Health and Nutrition Examination
Survey, What We Eat in America
(NHANES/WWEIA). As to residue levels
in food, EPA used tolerance level
residues, assumed 100 percent crop
treated (PCT) and incorporated default
processing factors from EPA’s Dietary
Exposure Evaluation Model when
processing data were not available.
iii. Cancer. EPA determines whether
quantitative cancer exposure and risk
assessments are appropriate for a fooduse pesticide based on the weight of the
evidence from cancer studies and other
relevant data. Cancer risk is quantified
using a linear or nonlinear approach. If
sufficient information on the
carcinogenic mode of action is available,
a threshold or nonlinear approach is
used and a cancer RfD is calculated
based on an earlier noncancer key event.
If carcinogenic mode of action data are
not available, or if the mode of action
data determines a mutagenic mode of
action, a default linear cancer slope
factor approach is utilized.
Based on the toxicological endpoints
for hexythiazox used for human risk
assessment discussed in Unit III.B. of
the February 8, 2013 Federal Register
final rule, EPA has concluded that
hexythiazox should be classified as
‘‘Likely to be Carcinogenic to Humans’’
and that a nonlinear RfD approach is
appropriate for assessing cancer risk.
Cancer risk was therefore assessed using
the chronic RfD and the chronic
exposure estimates as discussed in Unit
IV.B.1.ii. of this document.
iv. Anticipated residue and PCT
information. EPA did not use
anticipated residue and/or PCT
information in the dietary assessment
for hexythiazox. Tolerance level
residues and 100 PCT were assumed for
all food commodities.
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2. Dietary exposure from drinking
water. The Agency used screening level
water exposure models in the dietary
exposure analysis and risk assessment
for hexythiazox in drinking water.
These simulation models take into
account data on the physical, chemical,
and fate/transport characteristics of
hexythiazox. Further information
regarding EPA drinking water models
used in pesticide exposure assessment
can be found at https://www.epa.gov/
oppefed1/models/water/index.htm.
Based on the Pesticide Root Zone
Model/Exposure Analysis Modeling
System (PRZM/EXAMS), the estimated
drinking water concentration (EDWC) of
hexythiazox for chronic exposures for
non-cancer and cancer assessments is
estimated to be 4.31 parts per billion
(ppb) for surface water. Since surface
water residue values greatly exceed
groundwater EDWCs, surface water
residues were used in the dietary risk
assessments. Modeled estimates of
drinking water concentrations were
directly entered into the dietary
exposure model.
3. From non-dietary exposure. The
term ‘‘residential exposure’’ is used in
this document to refer to nonoccupational, non-dietary exposure
(e.g., for lawn and garden pest control,
indoor pest control, termiticides, and
flea and tick control on pets).
Hexythiazox is currently registered for
the following uses that could result in
residential exposures: Ornamental
plantings, turf, and fruit and nut trees in
residential settings. EPA assessed
residential exposure using the following
assumptions: Residential handler
exposures are expected to be short-term
(1 to 30 days) via either the dermal or
inhalation routes of exposure. Since no
dermal hazards were identified for
hexythiazox, MOEs were calculated for
the inhalation route of exposure only.
Both adults and children may be
exposed to hexythiazox residues from
contact with treated lawns or treated
residential plants. Adult postapplication exposures were not assessed
for hexythiazox because no dermal
hazards were identified, and inhalation
exposures are typically negligible in
outdoor settings. The post-application
exposures were assessed for children
from incidental oral exposure resulting
from transfer of residues from the hands
or objects to the mouth, and from the
incidental ingestion of soil. Postapplication hand-to-mouth and objectto-mouth exposures are expected to be
short-term (1 to 30 days) in duration due
to the intermittent nature of
applications in residential settings.
Given the long half-life of hexythiazox
in soil, intermediate-term (1 to 6
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months) exposure is also possible from
incidental ingestion of soil. Further
information regarding EPA standard
assumptions and generic inputs for
residential exposures may be found at:
https://www.epa.gov/pesticides/science/
USEPA-OPP-HED_
Residential%20SOPs_Oct2012.pdf.
4. Cumulative effects from substances
with a common mechanism of toxicity.
Section 408(b)(2)(D)(v) of FFDCA
requires that, when considering whether
to establish, modify, or revoke a
tolerance, the Agency consider
‘‘available information’’ concerning the
cumulative effects of a particular
pesticide’s residues and’’ other
substances that have a common
mechanism of toxicity.’’
EPA has not found hexythiazox to
share a common mechanism of toxicity
with any other substances, and
hexythiazox does not appear to produce
a toxic metabolite produced by other
substances. For the purposes of this
tolerance action, therefore, EPA has
assumed that hexythiazox does not have
a common mechanism of toxicity with
other substances. For information
regarding EPA’s efforts to determine
which chemicals have a common
mechanism of toxicity and to evaluate
the cumulative effects of such
chemicals, see EPA’s Web site at https://
www.epa.gov/pesticides/cumulative.
C. Safety Factor for Infants and Children
1. In general. Section 408(b)(2)(C) of
FFDCA provides that EPA shall apply
an additional tenfold (10X) margin of
safety for infants and children in the
case of threshold effects to account for
prenatal and postnatal toxicity and the
completeness of the database on toxicity
and exposure unless EPA determines
based on reliable data that a different
margin of safety will be safe for infants
and children. This additional margin of
safety is commonly referred to as the
Food Quality Protection Act Safety
Factor (FQPA SF). In applying this
provision, EPA either retains the default
value of 10X, or uses a different
additional SF when reliable data
available to EPA support the choice of
a different factor.
2. Prenatal and postnatal sensitivity.
The prenatal and postnatal toxicology
database indicates no increased
susceptibility of rats or rabbits to in
utero and/or postnatal exposure to
hexythiazox.
3. Conclusion. EPA has determined
that reliable data show that the safety of
infants and children would be
adequately protected if the FQPA SF
were reduced to 1X. That decision is
based on the following findings:
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i. The toxicity database for
hexythiazox is complete.
ii. There is no indication that
hexythiazox is a neurotoxic chemical
and there is no need for a
developmental neurotoxicity study or
additional uncertainty factors (UFs) to
account for neurotoxicity.
iii. There is no evidence that
hexythiazox results in increased
susceptibility of in utero rats or rabbits
in the prenatal developmental studies or
in young rats in the 2-generation
reproduction study.
iv. There are no residual uncertainties
identified in the exposure databases.
The dietary food exposure assessments
were performed based on 100 PCT and
tolerance-level residues. EPA made
conservative (protective) assumptions in
the ground and surface water modeling
used to assess exposure to hexythiazox
in drinking water. EPA used similarly
conservative assumptions to assess postapplication exposure of children as well
as incidental oral exposure of toddlers.
These assessments will not
underestimate the exposure and risks
posed by hexythiazox.
D. Aggregate Risks and Determination of
Safety
EPA determines whether acute and
chronic dietary pesticide exposures are
safe by comparing aggregate exposure
estimates to the acute PAD (aPAD) and
chronic PAD (cPAD). For linear cancer
risks, EPA calculates the lifetime
probability of acquiring cancer given the
estimated aggregate exposure. Short-,
intermediate-, and chronic-term risks
are evaluated by comparing the
estimated aggregate food, water, and
residential exposure to the appropriate
PODs to ensure that an adequate MOE
exists.
1. Acute risk. An acute aggregate risk
assessment takes into account acute
exposure estimates from dietary
consumption of food and drinking
water. No adverse effect resulting from
a single oral exposure was identified.
Therefore, hexythiazox is not expected
to pose an acute risk.
2. Chronic risk. Using the exposure
assumptions described in this unit for
chronic exposure, EPA has concluded
that chronic exposure to hexythiazox
from food and water will utilize 82% of
the cPAD for children 1 to 2 years of
age, the population group receiving the
greatest exposure. Based on the
explanation in this document in the unit
regarding residential use patterns,
chronic residential exposure to residues
of hexythiazox is not expected. Because
the cPAD utilized for the most
vulnerable population group is below
100%, aggregate exposure to
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hexythiazox is not expected to cause
chronic risks of concern.
3. Short-term risk. Short-term
aggregate exposure takes into account
short-term residential exposure plus
chronic exposure to food and water
(considered to be a background
exposure level).
Hexythiazox is currently registered for
uses that could result in short-term
residential exposure, and the Agency
has determined that it is appropriate to
aggregate chronic exposure through food
and water with short-term residential
exposures to hexythiazox.
Using the exposure assumptions
described in this unit for short-term
exposures, EPA has concluded the
combined short-term food, water, and
residential exposures result in aggregate
MOEs of 9,600 (adult females), 9,100
(adult males), and 1,300 for children.
Because EPA’s level of concern for
hexythiazox is an MOE of 100 or below,
these MOEs are not of concern.
4. Intermediate-term risk.
Intermediate-term aggregate exposure
takes into account intermediate-term
non-dietary, non-occupational exposure
plus chronic exposure to food and water
(considered to be a background
exposure level).
Hexythiazox is currently registered for
uses that could result in intermediateterm residential exposure, and the
Agency has determined that it is
appropriate to aggregate chronic
exposure through food and water with
intermediate-term residential exposures
to hexythiazox.
Using the exposure assumptions
described in this unit for intermediateterm exposures, EPA has concluded that
the combined intermediate-term food,
water, and residential exposures result
in aggregate MOEs of 9,800 (adult
females), 9,300 (adult males), and 1,500
for children. Because EPA’s level of
concern for hexythiazox is an MOE of
100 or below, these MOEs are not of
concern.
5. Aggregate cancer risk for U.S.
population. EPA’s classification of
hexythiazox as ‘‘Likely to be
Carcinogenic to Humans’’ is based upon
increased benign and malignant liver
tumors in high-dose female mice, and
benign mammary tumors in high-dose
male rats. EPA determined that a
nonlinear RfD quantitative estimation of
human cancer risk is appropriate, based
on the following: The liver tumors
observed are very common in that
species of mice and were only seen in
high dose female mice; the mammary
tumors observed were benign and only
occurred in the high-dose male rats; no
mutagenic effects were observed in
mammalian somatic and germ cell
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studies; and the chronic NOAEL used
for determining the RfD is 65 times
lower than the lowest dose at which
tumors were observed. Therefore, the
nonlinear chronic RfD approach is
protective of all chronic effects
including potential carcinogenicity of
hexythiazox. As a result, the expected
aggregate exposure to hexythiazox does
not present cancer risks of concern.
6. Determination of safety. Based on
these risk assessments, EPA concludes
that there is a reasonable certainty that
no harm will result to the general
population, or to infants and children,
from aggregate exposure to hexythiazox
residues.
V. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology
(high performance liquid
chromatography method with
ultraviolet detection (HPLC/UV)) is
available for enforcement of tolerances
for residues of hexythiazox and its
metabolites containing the PT–1–3
moiety in crop and livestock
commodities. This method is listed in
the ‘‘EPA Index of Residue Analytical
Methods’’ under hexythiazox as Method
AMR–985–87.
B. International Residue Limits
In making its tolerance decisions, EPA
seeks to harmonize U.S. tolerances with
international standards whenever
possible, consistent with U.S. food
safety standards and agricultural
practices. EPA considers the
international maximum residue limits
(MRLs) established by the Codex
Alimentarius Commission (Codex), as
required by FFDCA section 408(b)(4).
The Codex Alimentarius is a joint
United Nations Food and Agriculture
Organization/World Health
Organization food standards program,
and it is recognized as an international
food safety standards-setting
organization in trade agreements to
which the United States is a party. EPA
may establish a tolerance that is
different from a Codex MRL; however,
FFDCA section 408(b)(4) requires that
EPA explain the reasons for departing
from the Codex level.
The Codex has not established an
MRL for hexythiazox in or on sugar beet
root.
VI. Conclusion
Therefore, a time-limited tolerance is
established for residues of hexythiazox
and its metabolites containing the (4chlorophenyl)-4-methyl-2-oxo-3thiazolidine moiety, calculated as the
stoichiometric equivalent of
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hexythiazox, in or on beet, sugar, root at
0.15 ppm. This tolerance expires on
December 31, 2019.
VII. Statutory and Executive Order
Reviews
This action establishes tolerances
under FFDCA sections 408(e) and
408(l)(6). The Office of Management and
Budget (OMB) has exempted these types
of actions from review under Executive
Order 12866, entitled ‘‘Regulatory
Planning and Review’’ (58 FR 51735,
October 4, 1993). Because this action
has been exempted from review under
Executive Order 12866, this action is
not subject to Executive Order 13211,
entitled ‘‘Actions Concerning
Regulations That Significantly Affect
Energy Supply, Distribution, or Use’’ (66
FR 28355, May 22, 2001) or Executive
Order 13045, entitled ‘‘Protection of
Children from Environmental Health
Risks and Safety Risks’’ (62 FR 19885,
April 23, 1997). This action does not
contain any information collections
subject to OMB approval under the
Paperwork Reduction Act (PRA), 44
U.S.C. 3501 et seq., nor does it require
any special considerations under
Executive Order 12898, entitled
‘‘Federal Actions to Address
Environmental Justice in Minority
Populations and Low-Income
Populations’’ (59 FR 7629, February 16,
1994).
Since tolerances and exemptions that
are established in accordance with
FFDCA sections 408(e) and 408(l)(6),
such as the tolerances in this final rule,
do not require the issuance of a
proposed rule, the requirements of the
Regulatory Flexibility Act (RFA) (5
U.S.C. 601 et seq.) do not apply.
This action directly regulates growers,
food processors, food handlers, and food
retailers, not States or tribes, nor does
this action alter the relationships or
distribution of power and
responsibilities established by Congress
in the preemption provisions of FFDCA
section 408(n)(4). As such, the Agency
has determined that this action will not
have a substantial direct effect on States
or tribal governments, on the
relationship between the national
government and the States or tribal
governments, or on the distribution of
power and responsibilities among the
various levels of government or between
the Federal Government and Indian
tribes. Thus, the Agency has determined
that Executive Order 13132, entitled
‘‘Federalism’’ (64 FR 43255, August 10,
1999) and Executive Order 13175,
entitled ‘‘Consultation and Coordination
with Indian Tribal Governments’’ (65 FR
67249, November 9, 2000) do not apply
to this action. In addition, this action
VerDate Sep<11>2014
12:45 Dec 09, 2014
Jkt 235001
does not impose any enforceable duty or
contain any unfunded mandate as
described under Title II of the Unfunded
Mandates Reform Act (UMRA) (2 U.S.C.
1501 et seq.).
This action does not involve any
technical standards that would require
Agency consideration of voluntary
consensus standards pursuant to section
12(d) of the National Technology
Transfer and Advancement Act
(NTTAA) (15 U.S.C. 272 note).
VIII. Congressional Review Act
Pursuant to the Congressional Review
Act (5 U.S.C. 801 et seq.), EPA will
submit a report containing this rule and
other required information to the U.S.
Senate, the U.S. House of
Representatives, and the Comptroller
General of the United States prior to
publication of the rule in the Federal
Register. This action is not a ‘‘major
rule’’ as defined by 5 U.S.C. 804(2).
List of Subjects in 40 CFR Part 180
Environmental protection,
Administrative practice and procedure,
Agricultural commodities, Pesticides
and pests, Reporting and recordkeeping
requirements.
Dated: December 3, 2014.
Susan Lewis,
Director, Registration Division, Office of
Pesticide Programs.
Therefore, 40 CFR chapter I is
amended as follows:
PART 180—[AMENDED]
1. The authority citation for part 180
continues to read as follows:
■
Authority: 21 U.S.C. 321(q), 346a and 371.
2. In § 180.448, revise paragraph (b) to
read as follows:
■
§ 180.448
residues.
Hexythiazox; tolerance for
*
*
*
*
*
(b) Section 18 emergency exemptions.
A time-limited tolerance specified in the
following table is established for
residues of hexythiazox and its
metabolites containing the (4chlorophenyl)-4-methyl-2-oxo-3thiazolidine moiety, calculated as the
stoichiometric equivalent of
hexythiazox, in or on the specified
agricultural commodity, resulting from
use of the pesticide pursuant to FIFRA
section 18 emergency exemptions. The
tolerance expires on the date specified
in the table.
Commodity
Parts per
million
Expiration
date
Beet, sugar, root ...
0.15
12/31/19
PO 00000
Frm 00028
Fmt 4700
Sfmt 4700
*
*
*
*
*
[FR Doc. 2014–28935 Filed 12–9–14; 8:45 am]
BILLING CODE 6560–50–P
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 180
[EPA–HQ–OPP–2013–0695; FRL–9919–34]
Diisopropanolamine; Exemption From
the Requirement of a Tolerance
Environmental Protection
Agency (EPA).
ACTION: Final rule.
AGENCY:
This regulation establishes an
exemption from the requirement of a
tolerance for residues of
diisopropanolamine when used as an
inert ingredient (neutralizer or
stabilizer) at no more than 10% in
pesticide formulations applied to
growing crops or to raw agricultural
commodities after harvest. United
Phosphorus, Inc. submitted a petition to
EPA under the Federal Food, Drug, and
Cosmetic Act (FFDCA), requesting
establishment of an exemption from the
requirement of a tolerance. This
regulation eliminates the need to
establish a maximum permissible level
for residues of diisopropanolamine.
DATES: This regulation is effective
December 10, 2014. Objections and
requests for hearings must be received
on or before February 9, 2015, and must
be filed in accordance with the
instructions provided in 40 CFR part
178 (see also Unit I.C. of the
SUPPLEMENTARY INFORMATION).
ADDRESSES: The docket for this action,
identified by docket identification (ID)
number EPA–HQ–OPP–2013–0695, is
available at https://www.regulations.gov
or at the Office of Pesticide Programs
Regulatory Public Docket (OPP Docket)
in the Environmental Protection Agency
Docket Center (EPA/DC), West William
Jefferson Clinton Bldg., Rm. 3334, 1301
Constitution Ave. NW., Washington, DC
20460–0001. 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 OPP
Docket is (703) 305–5805. Please review
the visitor instructions and additional
information about the docket available
at https://www.epa.gov/dockets.
FOR FURTHER INFORMATION CONTACT:
Susan T. Lewis, Registration Division
(7505P), Office of Pesticide Programs,
Environmental Protection Agency, 1200
Pennsylvania Ave. NW., Washington,
DC 20460–0001; main telephone
SUMMARY:
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[Federal Register Volume 79, Number 237 (Wednesday, December 10, 2014)]
[Rules and Regulations]
[Pages 73214-73218]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-28935]
[[Page 73214]]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 180
[EPA-HQ-OPP-2014-0774; FRL-9919-69]
Hexythiazox; Pesticide Tolerance for Emergency Exemptions
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: This regulation establishes a time-limited tolerance for
residues of hexythiazox in or on sugar beet root. This action is
associated with the utilization of a crisis exemption under the Federal
Insecticide, Fungicide, and Rodenticide Act (FIFRA) authorizing use of
the pesticide on sugar beets. This regulation establishes a maximum
permissible level for residues of hexythiazox in or on sugar beet root.
The time-limited tolerance expires on December 31, 2019.
DATES: This regulation is effective December 10, 2014. Objections and
requests for hearings must be received on or before February 9, 2015,
and must be filed in accordance with the instructions provided in 40
CFR part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).
ADDRESSES: The docket for this action, identified by docket
identification (ID) number EPA-HQ-OPP-2014-0774, is available at https://www.regulations.gov or at the Office of Pesticide Programs Regulatory
Public Docket (OPP Docket) in the Environmental Protection Agency
Docket Center (EPA/DC), West William Jefferson Clinton Bldg., Rm. 3334,
1301 Constitution Ave. NW., Washington, DC 20460-0001. 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 OPP
Docket is (703) 305-5805. Please review the visitor instructions and
additional information about the docket available at https://www.epa.gov/dockets.
FOR FURTHER INFORMATION CONTACT: Susan Lewis, Registration Division
(7505P), Office of Pesticide Programs, Environmental Protection Agency,
1200 Pennsylvania Ave. NW., Washington, DC 20460-0001; main telephone
number: (703) 305-7090; email address: RDFRNotices@epa.gov.
SUPPLEMENTARY INFORMATION:
I. General Information
A. Does this action apply to me?
You may be potentially affected by this action if you are an
agricultural producer, food manufacturer, or pesticide manufacturer.
The following list of North American Industrial Classification System
(NAICS) codes is not intended to be exhaustive, but rather provides a
guide to help readers determine whether this document applies to them.
Potentially affected entities may include:
Crop production (NAICS code 111).
Animal production (NAICS code 112).
Food manufacturing (NAICS code 311).
Pesticide manufacturing (NAICS code 32532).
B. How can I get electronic access to other related information?
You may access a frequently updated electronic version of 40 CFR
part 180 through the Government Printing Office's e-CFR site at https://www.ecfr.gov/cgi-bin/text-idx?&c=ecfr&tpl=/ecfrbrowse/Title40/40tab_02.tpl.
C. How can I file an objection or hearing request?
Under section 408(g) of the Federal Food, Drug, and Cosmetic Act
(FFDCA), 21 U.S.C. 346a, any person may file an objection to any aspect
of this regulation and may also request a hearing on those objections.
You must file your objection or request a hearing on this regulation in
accordance with the instructions provided in 40 CFR part 178. To ensure
proper receipt by EPA, you must identify docket ID number EPA-HQ-OPP-
2014-0774 in the subject line on the first page of your submission. All
objections and requests for a hearing must be in writing, and must be
received by the Hearing Clerk on or before February 9, 2015. Addresses
for mail and hand delivery of objections and hearing requests are
provided in 40 CFR 178.25(b).
In addition to filing an objection or hearing request with the
Hearing Clerk as described in 40 CFR part 178, please submit a copy of
the filing (excluding any Confidential Business Information (CBI)) for
inclusion in the public docket. Information not marked confidential
pursuant to 40 CFR part 2 may be disclosed publicly by EPA without
prior notice. Submit the non-CBI copy of your objection or hearing
request, identified by docket ID number EPA-HQ-OPP-2014-0774, by one of
the following methods:
Federal eRulemaking Portal: https://www.regulations.gov.
Follow the online instructions for submitting comments. Do not submit
electronically any information you consider to be CBI or other
information whose disclosure is restricted by statute.
Mail: OPP Docket, Environmental Protection Agency Docket
Center (EPA/DC), (28221T), 1200 Pennsylvania Ave. NW., Washington, DC
20460-0001.
Hand Delivery: To make special arrangements for hand
delivery or delivery of boxed information, please follow the
instructions at https://www.epa.gov/dockets/contacts.html.
Additional instructions on commenting or visiting the docket, along
with more information about dockets generally, is available at https://www.epa.gov/dockets.
II. Background and Statutory Findings
EPA, on its own initiative, in accordance with FFDCA sections
408(e) and 408(l)(6), 21 U.S.C. 346a(e) and 346a(1)(6), is establishing
a time-limited tolerance for residues of hexythiazox and its
metabolites containing the (4-chlorophenyl)-4-methyl-2-oxo-3-
thiazolidine moiety, calculated as the stoichiometric equivalent of
hexythiazox, in or on sugar beet root at 0.15 parts per million (ppm).
This time-limited tolerance expires on December 31, 2019.
Section 408(l)(6) of FFDCA requires EPA to establish a time-limited
tolerance or exemption from the requirement for a tolerance for
pesticide chemical residues in food that will result from the use of a
pesticide under an emergency exemption granted by EPA under FIFRA
section 18. Such tolerances can be established without providing notice
or period for public comment. EPA does not intend for its actions on
FIFRA section 18 related time-limited tolerances to set binding
precedents for the application of FFDCA section 408 and the safety
standard to other tolerances and exemptions. Section 408(e) of FFDCA
allows EPA to establish a tolerance or an exemption from the
requirement of a tolerance on its own initiative, i.e., without having
received any petition from an outside party.
Section 408(b)(2)(A)(i) of FFDCA allows EPA to establish a
tolerance (the legal limit for a pesticide chemical residue in or on a
food) only if EPA determines that the tolerance is ``safe.'' Section
408(b)(2)(A)(ii) of FFDCA defines ``safe'' to mean that ``there is a
reasonable certainty that no harm will result from aggregate exposure
to the pesticide chemical residue, including all anticipated dietary
exposures and all
[[Page 73215]]
other exposures for which there is reliable information.'' This
includes exposure through drinking water and in residential settings,
but does not include occupational exposure. Section 408(b)(2)(C) of
FFDCA requires EPA to give special consideration to exposure of infants
and children to the pesticide chemical residue in establishing a
tolerance and to ``ensure that there is a reasonable certainty that no
harm will result to infants and children from aggregate exposure to the
pesticide chemical residue. . . .''
Section 18 of FIFRA authorizes EPA to exempt any Federal or State
agency from any provision of FIFRA, if EPA determines that ``emergency
conditions exist which require such exemption.'' EPA has established
regulations governing such emergency exemptions in 40 CFR part 166.
III. Emergency Exemption for Hexythiazox on Sugar Beet Root and FFDCA
Tolerances
The Idaho and Oregon State Departments of Agriculture (the States)
reported that two-spotted spider mite infestations at above-normal
levels have caused severe losses in the past several years in sugar
beet fields. Based upon activity observed in the early spring of 2014,
they projected similar mite population levels for the 2014 season as
well. The States claimed that alternative controls and practices would
not provide adequate control with high infestations and would not
prevent significant economic losses from occurring. The States also
noted concern that some of the alternative pesticides may be harmful to
beneficial insects which help control mites, and to bees pollinating
crops in the area. The applicants asserted that an emergency condition
existed in accordance with the criteria for approval of an emergency
exemption, and utilized crisis exemptions under FIFRA section 18 which
allowed the use of hexythiazox on sugar beet root for control of two-
spotted spider mites in the Idaho and Oregon. After having reviewed the
submissions, EPA concurred that an emergency condition existed.
As part of its evaluation of the emergency exemption applications,
EPA assessed the potential risks presented by residues of hexythiazox
in or on sugar beet root. In doing so, EPA considered the safety
standard in FFDCA section 408(b)(2), and EPA decided that the necessary
tolerance under FFDCA section 408(l)(6) would be consistent with the
safety standard and with FIFRA section 18. Consistent with the need to
move quickly on the emergency exemptions in order to address an urgent
non-routine situation and to ensure that the resulting food is safe and
lawful, EPA is issuing this tolerance without notice and opportunity
for public comment as provided in FFDCA section 408(l)(6). Although
this time-limited tolerance expires on December 31, 2019, under FFDCA
section 408(l)(5), residues of the pesticide not in excess of the
amount specified in the tolerance remaining in or on sugar beet root
after that date will not be unlawful, provided the pesticide was
applied in a manner that was lawful under FIFRA, and the residues do
not exceed a level that was authorized by this time-limited tolerance
at the time of that application. EPA will take action to revoke this
time-limited tolerance earlier if any experience with, scientific data
on, or other relevant information on this pesticide indicate that the
residues are not safe.
Because this time-limited tolerance is being approved under
emergency conditions, EPA has not made any decisions about whether
hexythiazox meets FIFRA's registration requirements for use on sugar
beets or whether permanent tolerances for this use would be
appropriate. Under these circumstances, EPA does not believe that this
time-limited tolerance decision serves as a basis for registration of
hexythiazox by a State for special local needs under FIFRA section
24(c). Nor does this tolerance by itself serve as the authority for
persons in any State other than Idaho and Oregon to use this pesticide
on sugar beets under FIFRA section 18 absent the issuance of an
emergency exemption applicable within that State. For additional
information regarding the emergency exemption for hexythiazox, contact
the Agency's Registration Division at the address provided under FOR
FURTHER INFORMATION CONTACT.
IV. Aggregate Risk Assessment and Determination of Safety
Section 408(b)(2)(A)(i) of FFDCA allows EPA to establish a
tolerance (the legal limit for a pesticide chemical residue in or on a
food) only if EPA determines that the tolerance is ``safe.'' Section
408(b)(2)(A)(ii) of FFDCA defines ``safe'' to mean that ``there is a
reasonable certainty that no harm will result from aggregate exposure
to the pesticide chemical residue, including all anticipated dietary
exposures and all other exposures for which there is reliable
information.'' This includes exposure through drinking water and in
residential settings, but does not include occupational exposure.
Section 408(b)(2)(C) of FFDCA requires EPA to give special
consideration to exposure of infants and children to the pesticide
chemical residue in establishing a tolerance and to ``ensure that there
is a reasonable certainty that no harm will result to infants and
children from aggregate exposure to the pesticide chemical residue. . .
.''
Consistent with the factors specified in FFDCA section
408(b)(2)(D), EPA has reviewed the available scientific data and other
relevant information in support of this action. EPA has sufficient data
to assess the hazards of and to make a determination on aggregate
exposure expected as a result of these emergency exemption requests and
the time-limited tolerance for residues of hexythiazox in or on sugar
beet root at 0.15 ppm. EPA's assessment of exposures and risks
associated with establishing the time-limited tolerance follows.
A. Toxicological Points of Departure/Levels of Concern
Once a pesticide's toxicological profile is determined, EPA
identifies toxicological points of departure (POD) and levels of
concern to use in evaluating the risk posed by human exposure to the
pesticide. For hazards that have a threshold below which there is no
appreciable risk, the toxicological POD is used as the basis for
derivation of reference values for risk assessment. PODs are developed
based on a careful analysis of the doses in each toxicological study to
determine the dose at which no adverse effects are observed (the NOAEL)
and the lowest dose at which adverse effects of concern are identified
(the LOAEL). Uncertainty/safety factors are used in conjunction with
the POD to calculate a safe exposure level--generally referred to as a
population-adjusted dose (PAD) or a reference dose (RfD)--and a safe
margin of exposure (MOE). For non-threshold risks, the Agency assumes
that any amount of exposure will lead to some degree of risk. Thus, the
Agency estimates risk in terms of the probability of an occurrence of
the adverse effect expected in a lifetime. For more information on the
general principles EPA uses in risk characterization and a complete
description of the risk assessment process, see https://www.epa.gov/pesticides/factsheets/riskassess.htm.
A summary of the toxicological endpoints for hexythiazox used for
human risk assessment is discussed in Unit III.B. of the final rule
published in the Federal Register of February 8, 2013 (78 FR 9322)
(FRL-9376-9).
[[Page 73216]]
B. Exposure Assessment
1. Dietary exposure from food and feed uses. In evaluating dietary
exposure to hexythiazox, EPA considered exposure under the time-limited
tolerance established by this action as well as all existing
hexythiazox tolerances in 40 CFR 180.448. EPA assessed dietary
exposures from hexythiazox in food as follows:
i. Acute exposure. No adverse acute effects were identified in the
toxicological studies for hexythiazox; therefore, a quantitative acute
dietary exposure assessment is unnecessary.
ii. Chronic exposure. In conducting the chronic dietary exposure
assessment EPA used the food consumption data from the U.S. Department
of Agriculture's 2003-2008 National Health and Nutrition Examination
Survey, What We Eat in America (NHANES/WWEIA). As to residue levels in
food, EPA used tolerance level residues, assumed 100 percent crop
treated (PCT) and incorporated default processing factors from EPA's
Dietary Exposure Evaluation Model when processing data were not
available.
iii. Cancer. EPA determines whether quantitative cancer exposure
and risk assessments are appropriate for a food-use pesticide based on
the weight of the evidence from cancer studies and other relevant data.
Cancer risk is quantified using a linear or nonlinear approach. If
sufficient information on the carcinogenic mode of action is available,
a threshold or nonlinear approach is used and a cancer RfD is
calculated based on an earlier noncancer key event. If carcinogenic
mode of action data are not available, or if the mode of action data
determines a mutagenic mode of action, a default linear cancer slope
factor approach is utilized.
Based on the toxicological endpoints for hexythiazox used for human
risk assessment discussed in Unit III.B. of the February 8, 2013
Federal Register final rule, EPA has concluded that hexythiazox should
be classified as ``Likely to be Carcinogenic to Humans'' and that a
nonlinear RfD approach is appropriate for assessing cancer risk. Cancer
risk was therefore assessed using the chronic RfD and the chronic
exposure estimates as discussed in Unit IV.B.1.ii. of this document.
iv. Anticipated residue and PCT information. EPA did not use
anticipated residue and/or PCT information in the dietary assessment
for hexythiazox. Tolerance level residues and 100 PCT were assumed for
all food commodities.
2. Dietary exposure from drinking water. The Agency used screening
level water exposure models in the dietary exposure analysis and risk
assessment for hexythiazox in drinking water. These simulation models
take into account data on the physical, chemical, and fate/transport
characteristics of hexythiazox. Further information regarding EPA
drinking water models used in pesticide exposure assessment can be
found at https://www.epa.gov/oppefed1/models/water/index.htm.
Based on the Pesticide Root Zone Model/Exposure Analysis Modeling
System (PRZM/EXAMS), the estimated drinking water concentration (EDWC)
of hexythiazox for chronic exposures for non-cancer and cancer
assessments is estimated to be 4.31 parts per billion (ppb) for surface
water. Since surface water residue values greatly exceed groundwater
EDWCs, surface water residues were used in the dietary risk
assessments. Modeled estimates of drinking water concentrations were
directly entered into the dietary exposure model.
3. From non-dietary exposure. The term ``residential exposure'' is
used in this document to refer to non-occupational, non-dietary
exposure (e.g., for lawn and garden pest control, indoor pest control,
termiticides, and flea and tick control on pets).
Hexythiazox is currently registered for the following uses that
could result in residential exposures: Ornamental plantings, turf, and
fruit and nut trees in residential settings. EPA assessed residential
exposure using the following assumptions: Residential handler exposures
are expected to be short-term (1 to 30 days) via either the dermal or
inhalation routes of exposure. Since no dermal hazards were identified
for hexythiazox, MOEs were calculated for the inhalation route of
exposure only. Both adults and children may be exposed to hexythiazox
residues from contact with treated lawns or treated residential plants.
Adult post-application exposures were not assessed for hexythiazox
because no dermal hazards were identified, and inhalation exposures are
typically negligible in outdoor settings. The post-application
exposures were assessed for children from incidental oral exposure
resulting from transfer of residues from the hands or objects to the
mouth, and from the incidental ingestion of soil. Post-application
hand-to-mouth and object-to-mouth exposures are expected to be short-
term (1 to 30 days) in duration due to the intermittent nature of
applications in residential settings. Given the long half-life of
hexythiazox in soil, intermediate-term (1 to 6 months) exposure is also
possible from incidental ingestion of soil. Further information
regarding EPA standard assumptions and generic inputs for residential
exposures may be found at: https://www.epa.gov/pesticides/science/USEPA-OPP-HED_Residential%20SOPs_Oct2012.pdf.
4. Cumulative effects from substances with a common mechanism of
toxicity. Section 408(b)(2)(D)(v) of FFDCA requires that, when
considering whether to establish, modify, or revoke a tolerance, the
Agency consider ``available information'' concerning the cumulative
effects of a particular pesticide's residues and'' other substances
that have a common mechanism of toxicity.''
EPA has not found hexythiazox to share a common mechanism of
toxicity with any other substances, and hexythiazox does not appear to
produce a toxic metabolite produced by other substances. For the
purposes of this tolerance action, therefore, EPA has assumed that
hexythiazox does not have a common mechanism of toxicity with other
substances. For information regarding EPA's efforts to determine which
chemicals have a common mechanism of toxicity and to evaluate the
cumulative effects of such chemicals, see EPA's Web site at https://www.epa.gov/pesticides/cumulative.
C. Safety Factor for Infants and Children
1. In general. Section 408(b)(2)(C) of FFDCA provides that EPA
shall apply an additional tenfold (10X) margin of safety for infants
and children in the case of threshold effects to account for prenatal
and postnatal toxicity and the completeness of the database on toxicity
and exposure unless EPA determines based on reliable data that a
different margin of safety will be safe for infants and children. This
additional margin of safety is commonly referred to as the Food Quality
Protection Act Safety Factor (FQPA SF). In applying this provision, EPA
either retains the default value of 10X, or uses a different additional
SF when reliable data available to EPA support the choice of a
different factor.
2. Prenatal and postnatal sensitivity. The prenatal and postnatal
toxicology database indicates no increased susceptibility of rats or
rabbits to in utero and/or postnatal exposure to hexythiazox.
3. Conclusion. EPA has determined that reliable data show that the
safety of infants and children would be adequately protected if the
FQPA SF were reduced to 1X. That decision is based on the following
findings:
[[Page 73217]]
i. The toxicity database for hexythiazox is complete.
ii. There is no indication that hexythiazox is a neurotoxic
chemical and there is no need for a developmental neurotoxicity study
or additional uncertainty factors (UFs) to account for neurotoxicity.
iii. There is no evidence that hexythiazox results in increased
susceptibility of in utero rats or rabbits in the prenatal
developmental studies or in young rats in the 2-generation reproduction
study.
iv. There are no residual uncertainties identified in the exposure
databases. The dietary food exposure assessments were performed based
on 100 PCT and tolerance-level residues. EPA made conservative
(protective) assumptions in the ground and surface water modeling used
to assess exposure to hexythiazox in drinking water. EPA used similarly
conservative assumptions to assess post-application exposure of
children as well as incidental oral exposure of toddlers. These
assessments will not underestimate the exposure and risks posed by
hexythiazox.
D. Aggregate Risks and Determination of Safety
EPA determines whether acute and chronic dietary pesticide
exposures are safe by comparing aggregate exposure estimates to the
acute PAD (aPAD) and chronic PAD (cPAD). For linear cancer risks, EPA
calculates the lifetime probability of acquiring cancer given the
estimated aggregate exposure. Short-, intermediate-, and chronic-term
risks are evaluated by comparing the estimated aggregate food, water,
and residential exposure to the appropriate PODs to ensure that an
adequate MOE exists.
1. Acute risk. An acute aggregate risk assessment takes into
account acute exposure estimates from dietary consumption of food and
drinking water. No adverse effect resulting from a single oral exposure
was identified. Therefore, hexythiazox is not expected to pose an acute
risk.
2. Chronic risk. Using the exposure assumptions described in this
unit for chronic exposure, EPA has concluded that chronic exposure to
hexythiazox from food and water will utilize 82% of the cPAD for
children 1 to 2 years of age, the population group receiving the
greatest exposure. Based on the explanation in this document in the
unit regarding residential use patterns, chronic residential exposure
to residues of hexythiazox is not expected. Because the cPAD utilized
for the most vulnerable population group is below 100%, aggregate
exposure to hexythiazox is not expected to cause chronic risks of
concern.
3. Short-term risk. Short-term aggregate exposure takes into
account short-term residential exposure plus chronic exposure to food
and water (considered to be a background exposure level).
Hexythiazox is currently registered for uses that could result in
short-term residential exposure, and the Agency has determined that it
is appropriate to aggregate chronic exposure through food and water
with short-term residential exposures to hexythiazox.
Using the exposure assumptions described in this unit for short-
term exposures, EPA has concluded the combined short-term food, water,
and residential exposures result in aggregate MOEs of 9,600 (adult
females), 9,100 (adult males), and 1,300 for children. Because EPA's
level of concern for hexythiazox is an MOE of 100 or below, these MOEs
are not of concern.
4. Intermediate-term risk. Intermediate-term aggregate exposure
takes into account intermediate-term non-dietary, non-occupational
exposure plus chronic exposure to food and water (considered to be a
background exposure level).
Hexythiazox is currently registered for uses that could result in
intermediate-term residential exposure, and the Agency has determined
that it is appropriate to aggregate chronic exposure through food and
water with intermediate-term residential exposures to hexythiazox.
Using the exposure assumptions described in this unit for
intermediate-term exposures, EPA has concluded that the combined
intermediate-term food, water, and residential exposures result in
aggregate MOEs of 9,800 (adult females), 9,300 (adult males), and 1,500
for children. Because EPA's level of concern for hexythiazox is an MOE
of 100 or below, these MOEs are not of concern.
5. Aggregate cancer risk for U.S. population. EPA's classification
of hexythiazox as ``Likely to be Carcinogenic to Humans'' is based upon
increased benign and malignant liver tumors in high-dose female mice,
and benign mammary tumors in high-dose male rats. EPA determined that a
nonlinear RfD quantitative estimation of human cancer risk is
appropriate, based on the following: The liver tumors observed are very
common in that species of mice and were only seen in high dose female
mice; the mammary tumors observed were benign and only occurred in the
high-dose male rats; no mutagenic effects were observed in mammalian
somatic and germ cell studies; and the chronic NOAEL used for
determining the RfD is 65 times lower than the lowest dose at which
tumors were observed. Therefore, the nonlinear chronic RfD approach is
protective of all chronic effects including potential carcinogenicity
of hexythiazox. As a result, the expected aggregate exposure to
hexythiazox does not present cancer risks of concern.
6. Determination of safety. Based on these risk assessments, EPA
concludes that there is a reasonable certainty that no harm will result
to the general population, or to infants and children, from aggregate
exposure to hexythiazox residues.
V. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology (high performance liquid
chromatography method with ultraviolet detection (HPLC/UV)) is
available for enforcement of tolerances for residues of hexythiazox and
its metabolites containing the PT-1-3 moiety in crop and livestock
commodities. This method is listed in the ``EPA Index of Residue
Analytical Methods'' under hexythiazox as Method AMR-985-87.
B. International Residue Limits
In making its tolerance decisions, EPA seeks to harmonize U.S.
tolerances with international standards whenever possible, consistent
with U.S. food safety standards and agricultural practices. EPA
considers the international maximum residue limits (MRLs) established
by the Codex Alimentarius Commission (Codex), as required by FFDCA
section 408(b)(4). The Codex Alimentarius is a joint United Nations
Food and Agriculture Organization/World Health Organization food
standards program, and it is recognized as an international food safety
standards-setting organization in trade agreements to which the United
States is a party. EPA may establish a tolerance that is different from
a Codex MRL; however, FFDCA section 408(b)(4) requires that EPA explain
the reasons for departing from the Codex level.
The Codex has not established an MRL for hexythiazox in or on sugar
beet root.
VI. Conclusion
Therefore, a time-limited tolerance is established for residues of
hexythiazox and its metabolites containing the (4-chlorophenyl)-4-
methyl-2-oxo-3-thiazolidine moiety, calculated as the stoichiometric
equivalent of
[[Page 73218]]
hexythiazox, in or on beet, sugar, root at 0.15 ppm. This tolerance
expires on December 31, 2019.
VII. Statutory and Executive Order Reviews
This action establishes tolerances under FFDCA sections 408(e) and
408(l)(6). The Office of Management and Budget (OMB) has exempted these
types of actions from review under Executive Order 12866, entitled
``Regulatory Planning and Review'' (58 FR 51735, October 4, 1993).
Because this action has been exempted from review under Executive Order
12866, this action is not subject to Executive Order 13211, entitled
``Actions Concerning Regulations That Significantly Affect Energy
Supply, Distribution, or Use'' (66 FR 28355, May 22, 2001) or Executive
Order 13045, entitled ``Protection of Children from Environmental
Health Risks and Safety Risks'' (62 FR 19885, April 23, 1997). This
action does not contain any information collections subject to OMB
approval under the Paperwork Reduction Act (PRA), 44 U.S.C. 3501 et
seq., nor does it require any special considerations under Executive
Order 12898, entitled ``Federal Actions to Address Environmental
Justice in Minority Populations and Low-Income Populations'' (59 FR
7629, February 16, 1994).
Since tolerances and exemptions that are established in accordance
with FFDCA sections 408(e) and 408(l)(6), such as the tolerances in
this final rule, do not require the issuance of a proposed rule, the
requirements of the Regulatory Flexibility Act (RFA) (5 U.S.C. 601 et
seq.) do not apply.
This action directly regulates growers, food processors, food
handlers, and food retailers, not States or tribes, nor does this
action alter the relationships or distribution of power and
responsibilities established by Congress in the preemption provisions
of FFDCA section 408(n)(4). As such, the Agency has determined that
this action will not have a substantial direct effect on States or
tribal governments, on the relationship between the national government
and the States or tribal governments, or on the distribution of power
and responsibilities among the various levels of government or between
the Federal Government and Indian tribes. Thus, the Agency has
determined that Executive Order 13132, entitled ``Federalism'' (64 FR
43255, August 10, 1999) and Executive Order 13175, entitled
``Consultation and Coordination with Indian Tribal Governments'' (65 FR
67249, November 9, 2000) do not apply to this action. In addition, this
action does not impose any enforceable duty or contain any unfunded
mandate as described under Title II of the Unfunded Mandates Reform Act
(UMRA) (2 U.S.C. 1501 et seq.).
This action does not involve any technical standards that would
require Agency consideration of voluntary consensus standards pursuant
to section 12(d) of the National Technology Transfer and Advancement
Act (NTTAA) (15 U.S.C. 272 note).
VIII. Congressional Review Act
Pursuant to the Congressional Review Act (5 U.S.C. 801 et seq.),
EPA will submit a report containing this rule and other required
information to the U.S. Senate, the U.S. House of Representatives, and
the Comptroller General of the United States prior to publication of
the rule in the Federal Register. This action is not a ``major rule''
as defined by 5 U.S.C. 804(2).
List of Subjects in 40 CFR Part 180
Environmental protection, Administrative practice and procedure,
Agricultural commodities, Pesticides and pests, Reporting and
recordkeeping requirements.
Dated: December 3, 2014.
Susan Lewis,
Director, Registration Division, Office of Pesticide Programs.
Therefore, 40 CFR chapter I is amended as follows:
PART 180--[AMENDED]
0
1. The authority citation for part 180 continues to read as follows:
Authority: 21 U.S.C. 321(q), 346a and 371.
0
2. In Sec. 180.448, revise paragraph (b) to read as follows:
Sec. [emsp14]180.448 Hexythiazox; tolerance for residues.
* * * * *
(b) Section 18 emergency exemptions. A time-limited tolerance
specified in the following table is established for residues of
hexythiazox and its metabolites containing the (4-chlorophenyl)-4-
methyl-2-oxo-3-thiazolidine moiety, calculated as the stoichiometric
equivalent of hexythiazox, in or on the specified agricultural
commodity, resulting from use of the pesticide pursuant to FIFRA
section 18 emergency exemptions. The tolerance expires on the date
specified in the table.
------------------------------------------------------------------------
Parts per Expiration
Commodity million date
------------------------------------------------------------------------
Beet, sugar, root............................. 0.15 12/31/19
------------------------------------------------------------------------
* * * * *
[FR Doc. 2014-28935 Filed 12-9-14; 8:45 am]
BILLING CODE 6560-50-P