Hexythiazox; Pesticide Tolerances, 40741-40745 [2010-17034]
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Federal Register / Vol. 75, No. 134 / Wednesday, July 14, 2010 / Rules and Regulations
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 final rule. In addition, this final
rule does not impose any enforceable
duty or contain any unfunded mandate
as described under Title II of the
Unfunded Mandates Reform Act of 1995
(UMRA) (Public Law 104–4).
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 of 1995
(NTTAA), Public Law 104–113, section
12(d) (15 U.S.C. 272 note).
XI. Congressional Review Act
The Congressional Review Act, 5
U.S.C. 801 et seq., generally provides
that before a rule may take effect, the
agency promulgating the rule must
submit a rule report to each House of
the Congress and to the Comptroller
General of the United States. 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 this final rule in the
Federal Register. This final rule 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: June 30, 2010.
W. Michael McDavit,
Acting Director, Biopesticides and Pollution
Prevention 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:
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■
Authority: 21 U.S.C. 321(q), 346a and 371.
2. In subpart D, revise §180.1258 to
read as follows:
■
§ 180.1258 Acetic acid; exemption from
the requirement of a tolerance.
(a) An exemption from the
requirement of a tolerance is established
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for residues of the biochemical pesticide
acetic acid when used as a preservative
on post-harvest agricultural
commodities intended for animal feed,
including Alfalfa, seed; alfalfa, hay;
barley, grain; bermudagrass, hay;
bluegrass, hay; bromegrass, hay; clover,
hay; corn, field, grain; corn, pop, grain;
cowpea, hay; fescue, hay; lespedeza,
hay; lupin; oat, grain; orchardgrass, hay;
peanut, hay; timothy, hay; vetch, hay;
and wheat, grain, or commodities
described as grain or hay.
(b) An exemption from the
requirement of a tolerance is established
for residues of acetic acid in or on all
food crops resulting from unintentional
spray and drift to non-target vegetation
including non-food, food and feed crops
when used as a non-selective contact
herbicide spray.
[FR Doc. 2010–17163 Filed 7–13–10; 8:45 am]
BILLING CODE 6560–50–S
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 180
[EPA–HQ–OPP–2009–0325; FRL–8833–6]
Hexythiazox; Pesticide Tolerances
AGENCY: Environmental Protection
Agency (EPA).
ACTION: Final rule.
SUMMARY: This regulation revises
tolerances for combined residues of
hexythiazox in or on stone fruit. Gowan
Company requested these tolerances
under the Federal Food, Drug, and
Cosmetic Act (FFDCA).
DATES: This regulation is effective July
14, 2010. Objections and requests for
hearings must be received on or before
September 13, 2010, 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: EPA has established a
docket for this action under docket
identification (ID) number EPA–HQ–
OPP–2009–0325. All documents in the
docket are listed in the docket index
available at https://www.regulations.gov.
Although listed in the index, some
information is not publicly available,
e.g., Confidential Business Information
(CBI) or other information whose
disclosure is restricted by statute.
Certain other material, such as
copyrighted material, is not placed on
the Internet and will be publicly
available only in hard copy form.
Publicly available docket materials are
available in the electronic docket at
https://www.regulations.gov, or, if only
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available in hard copy, at the OPP
Regulatory Public Docket in Rm. S–
4400, One Potomac Yard (South Bldg.),
2777 S. Crystal Dr., Arlington, VA. The
Docket Facility is open from 8:30 a.m.
to 4 p.m., Monday through Friday,
excluding legal holidays. The Docket
Facility telephone number is (703) 305–
5805.
FOR FURTHER INFORMATION CONTACT: Olga
Odiott, Registration Division (7505P),
Office of Pesticide Programs,
Environmental Protection Agency, 1200
Pennsylvania Ave., NW., Washington,
DC 20460–0001; telephone number:
(703) 308–9369; e-mail address:
odiott.olga@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. Potentially
affected entities may include, but are
not limited to those engaged in the
following activities:
• Crop production (NAICS code 111).
• Animal production (NAICS code
112).
• Food manufacturing (NAICS code
311).
• Pesticide manufacturing (NAICS
code 32532).
This listing is not intended to be
exhaustive, but rather to provide a guide
for readers regarding entities likely to be
affected by this action. Other types of
entities not listed in this unit could also
be affected. The North American
Industrial Classification System
(NAICS) codes have been provided to
assist you and others in determining
whether this action might apply to
certain entities. If you have any
questions regarding the applicability of
this action to a particular entity, consult
the person listed under FOR FURTHER
INFORMATION CONTACT.
B. How Can I Get Electronic Access to
Other Related Information?
You may access a frequently updated
electronic version of EPA’s tolerance
regulations at 40 CFR part 180 through
the Government Printing Office’s e-CFR
site at https://www.gpoaccess.gov/ecfr.
C. How Can I File an Objection or
Hearing Request?
Under FFDCA section 408(g), 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
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provided in 40 CFR part 178. To ensure
proper receipt by EPA, you must
identify docket ID number EPA–HQ–
OPP–2009–0325 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 September 13, 2010. 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 that does not
contain any 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 a copy of
your non-CBI objection or hearing
request, identified by docket ID number
EPA–HQ–OPP–2009–0325, by one of
the following methods:
• Federal eRulemaking Portal: https://
www.regulations.gov. Follow the on-line
instructions for submitting comments.
• Mail: Office of Pesticide Programs
(OPP) Regulatory Public Docket (7502P),
Environmental Protection Agency, 1200
Pennsylvania Ave., NW., Washington,
DC 20460–0001.
• Delivery: OPP Regulatory Public
Docket (7502P), Environmental
Protection Agency, Rm. S–4400, One
Potomac Yard (South Bldg.), 2777 S.
Crystal Dr., Arlington, VA. Deliveries
are only accepted during the Docket
Facility’s normal hours of operation
(8:30 a.m. to 4 p.m., Monday through
Friday, excluding legal holidays).
Special arrangements should be made
for deliveries of boxed information. The
Docket Facility telephone number is
(703) 305–5805.
II. Summary of Petitioned-For
Tolerance
In the Federal Register of August 19,
2009 (74 FR 41898) (FRL–8426–7), EPA
issued a notice pursuant to section
408(d)(3) of FFDCA, 21 U.S.C.
346a(d)(3), announcing the filing of a
pesticide petition (PP 9F7556) by
Gowan Company, 370 South Main
Street, Yuma, AZ 85364. The petition
requested that 40 CFR 180.448 be
amended by revising tolerances for
residues of the insecticide hexythiazox,
(trans-5-(4-chlorophenyl)-N-cyclohexyl4-methyl-2-oxothiazolidine-3carboxamide) and its metabolites
containing the (4-chlorophenyl)-4methyl-2-oxo-3- thiazolidine moiety, as
follows: Revising the tolerance ‘‘fruit,
stone, group 12, except plums’’ to read
‘‘ fruit, stone, group 12; removing the
existing separate tolerance for fresh,
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prune, plums at 0.1 parts per million
(ppm); revising the tolerance in or on
plum, prune, dried from 0.4 to 1.3 ppm;
and by revising the tolerance in or on
grapes from 0.75 to 1.0 ppm. That notice
referenced a summary of the petition
prepared by Gowan Company, the
registrant, which is available in the
docket, https://www.regulations.gov.
There were no comments received in
response to the notice of filing.
Based upon review of the data
supporting the petition, EPA issued a
notice in the Federal Register of March
17, 2010 (75 FR 12691) (FRL–8813–7),
revising the tolerance for grapes and
revising the tolerance expression for
hexythiazox. In that notice the Agency
also announced that the residue
chemistry data were insufficient to
support the proposed revisions of the
tolerances for the stone fruit use. Gowan
Company, the registrant, has submitted
additional data to adequately support
the requested revisions to the stone fruit
tolerances. This action addresses the
updated aggregate risk assessment
incorporating the revised dietary
assessment on stone fruit.
III. 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 section 408(b)(2)(D)
of FFDCA, and the factors specified in
section 408(b)(2)(D) of FFDCA, 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 for hexythiazox
including exposure resulting from the
tolerances established by this action.
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EPA’s assessment of exposures and risks
associated with hexythiazox follows.
A. Toxicological Profile
EPA has evaluated the available
toxicity data and considered its validity,
completeness, and reliability as well as
the relationship of the results of the
studies to human risk. EPA has also
considered available information
concerning the variability of the
sensitivities of major identifiable
subgroups of consumers, including
infants and children. Hexythiazox has a
low order of acute toxicity by the oral,
dermal and inhalation routes of
exposure. It produces mild eye
irritation, is not a dermal irritant, and is
negative for dermal sensitization.
Hexythiazox is not a developmental or
reproductive toxicant. The toxicology
database for hexythiazox provides no
indication of increased susceptibility in
rats or rabbits from in utero and
postnatal exposure to hexythiazox. The
database does not show any evidence of
treatment-related effects on the nervous
system or the immune system.
Hexythiazox is classified as ‘‘Likely to
be Carcinogenic to Humans.’’ EPA has
determined that a non-quantitative risk
assessment approach (i.e., nonlinear,
reference dose (RfD) approach) was
appropriate and protective of all chronic
effects including potential
carcinogenicity of hexythiazox.
Specific information on the studies
received and the nature of the adverse
effects caused by hexythiazox as well as
the no-observed-adverse-effect-level
(NOAEL) and the lowest-observedadverse-effect-level (LOAEL) from the
toxicity studies can be found in the final
rule published in the Federal Register
of March 17, 2010 (75 FR 12691), and
at https://www.regulations.gov in
document ‘‘Hexythiazox. Human Health
Risk Assessment to Support Amended
Use on Stone Fruit Reducing the
Preharvest Interval from 28–Days to 7–
Days,’’ p. 28 in docket ID number EPA–
HQ–OPP–2009–0325.
B. 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
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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
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 can be found in
the final rule published in the Federal
Register of March 17, 2010 (75 FR
12691), and at https://
www.regulations.gov in document
‘‘Hexythiazox. Human Health Risk
Assessment to Support Amended Use
on Stone Fruit Reducing the Preharvest
Interval from 28–Days to 7–Days,’’ p. 13
in docket ID number EPA–HQ–OPP–
2009–0325.
C. Exposure Assessment
1. Dietary exposure from food and
feed uses. In evaluating dietary
exposure to hexythiazox, EPA
considered exposure under the
petitioned-for tolerances 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. Quantitative acute
dietary exposure and risk assessments
are performed for a food-use pesticide,
if a toxicological study has indicated the
possibility of an effect of concern
occurring as a result of a 1–day or single
exposure.
No such 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 United States Department of
Agriculture (USDA) 1994–1996 and
1998 CSFII. As to residue levels in food,
EPA used tolerance level residues,
assumed 100 percent crop treated (PCT),
and incorporated default processing
factors.
iii. Cancer. As discussed in this unit,
EPA has determined that the chronic
RfD is sufficient to evaluate all chronic
risks for this chemical, including
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carcinogenic potential. Cancer risk was
quantified using the same estimates as
discussed in Unit III.C.1.ii., chronic
exposure.
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/or 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 4.1 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
assessment.
The modeled estimate of drinking
water concentrations was 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 not currently
registered for any specific use patterns
that would result in residential
exposure. However, the following uses
that could result in residential
exposures are pending registration in
the near future and are included in this
risk assessment: Turf, gardens,
ornamental landscape plantings,
ornamental plants, trees and vines in
nurseries, residential fruit trees, nut
trees and caneberries, and orchids.
Both adults and children may be
exposed to hexythiazox residues from
contact with treated lawns or treated
plants. The exposure and risk
assessment included risks to adult
handlers from inhalation exposures. The
exposure assessment for children
included risks from incidental oral
exposure resulting from transfer of
residues from the hands or objects to the
mouth, and from incidental ingestion of
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soil. Details of the residential exposure
and risk assessment are contained in the
final rule published in the Federal
Register of March 17, 2010 (75 FR
12691), and at https://
www.regulations.gov in document
‘‘Hexythiazox. Human Health Risk
Assessment to Support Amended Use
on Stone Fruit Reducing the Preharvest
Interval from 28–Days to 7–Days,’’ p. 19
in docket ID number EPA–HQ–OPP–
2009–0325.
Further information regarding EPA
standard assumptions and generic
inputs for residential exposures may be
found at https://www.epa.gov/pesticides/
trac/science/trac6a05.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 website at https://
www.epa.gov/pesticides/cumulative.
D. 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 safety factor when reliable
data available to EPA support the choice
of a different factor.
2. Prenatal and postnatal sensitivity.
The prenatal and postnatal toxicology
data base indicates no increased
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susceptibility of rats or rabbits to in
utero and/or postnatal exposure to
hexythiazox.
3. Conclusion. EPA has determined
that reliable data show 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:
i. The toxicity database for
hexythiazox is incomplete under the
new 40 CFR part 158 data requirements
for conventional pesticides, which
requires certain generic testing,
including acute and subchronic
neurotoxicity studies and an
immunotoxicity study. However, the
toxicology database does not show any
evidence of treatment-related effects on
the nervous system or the immune
system. The overall weight of evidence
suggests that this chemical does not
directly target either system. Although
acute and subchronic neurotoxicity
studies and an immunotoxicity study
are required as a part of new data
requirements in the 40 CFR part 158 for
conventional pesticide registrations, the
Agency does not believe that conducting
these studies will result in a lower POD
than any currently used for risk
assessment, and therefore, a database
uncertainty factor (UFDB) is not needed
to account for the lack of these studies.
ii. There is no indication that
hexythiazox is a neurotoxic chemical
and there is no need for a
developmental neurotoxicity study or
additional UFs to account for
neurotoxicity.
iii. There is no evidence that
hexythiazox results in increased
susceptibility in 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. The dietary
risk assessment is highly conservative
and not expected to underestimate risk.
EPA made conservative (protective)
assumptions in the ground and surface
water modeling used to assess exposure
to hexythiazox in drinking water. These
assessments will not underestimate the
exposure and risks posed by
hexythiazox.
E. 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
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probability of acquiring cancer given the
estimated aggregate exposure. Shortterm, intermediate-term, and chronicterm 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
and no acute dietary endpoint was
selected. 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 49% of
the cPAD for (children 1–2 years old)
the population group receiving the
greatest exposure. Based on the
explanation in Unit III.C.3., regarding
residential use patterns, chronic
residential exposure to residues of
hexythiazox is not expected.
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).
There are potential short-term
exposures from the pending residential
uses for hexythiazox. 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 16,000 for adults and 2,000 for
children. Because EPA’s level of
concern for hexythiazox is a MOE of 100
or below, these MOEs are not of
concern.
4. Intermediate-term risk.
Intermediate-term aggregate exposure
takes into account intermediate-term
residential exposure plus chronic
exposure to food and water (considered
to be a background exposure level).
There are potential intermediate-term
exposures from the pending residential
uses for hexythiazox. The Agency has
determined that it is appropriate to
aggregate chronic exposure through food
and water with intermediate-term
residential exposure to hexythiazox.
Using the exposure assumptions
described in this unit for intermediateterm exposures, EPA has concluded that
the combined intermediate-term food,
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water, and residential exposures result
in aggregate MOEs of 16,000 for adults
and 2,200 for children. Because EPA’s
level of concern for hexythiazox is a
MOE of 100 or below, these MOEs are
not of concern.
5. Aggregate cancer risk for U.S.
population. As discussed in Unit III.A.,
and the Federal Register of March 17,
2010, (75 FR 12691), EPA concluded
that regulation based on the chronic
reference dose will be protective for
both chronic and carcinogenic risks. As
noted in this unit there are no chronic
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.
IV. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology
(high performance liquid
chromatography with ultra violet
detection (HPLC/UV) is available to
enforce the tolerance expression. The
method may be requested from: Chief,
Analytical Chemistry Branch,
Environmental Science Center, 701
Mapes Rd., Ft. Meade, MD 20755–5350;
telephone number: (410) 305–2905; email address: residuemethods@epa.gov.
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 U.S. 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.
Codex MRLs are established for
residues of hexythiazox in or on cherry
and peach at 1.0 ppm, and plum
(including prune) at 0.2 ppm. There are
no currently established Canadian or
Mexican MRLs for residues of
hexythiazox for these crops. The Agency
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has harmonized the residue level with
established Codex MRLs on cherry and
peach, but notes that it is not possible
to harmonize the tolerance expression at
this time as the Codex MRL includes
parent only. Additionally, it is not
possible to harmonize with the codex
MRL for plums as the established Codex
MRL of 0.2 ppm is too low to cover
residues that could result from the use
of hexythiazox in the U.S.
wwoods2 on DSK1DXX6B1PROD with RULES_PART 1
V. Conclusion
Therefore, the tolerance for residues
of hexythiazox, in or on plum, prune,
dried is revised from 0.4 ppm to 1.3
ppm; and the tolerance for fruit, stone,
group 12, except plum is revised to read
fruit, stone, group 12. The established
tolerances for plum and for plum,
prune, fresh can be removed as these
commodities are addressed by the stone
fruit group tolerance.
VI. Statutory and Executive Order
Reviews
This final rule establishes tolerances
under section 408(d) of FFDCA in
response to a petition submitted to the
Agency. 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 final rule
has been exempted from review under
Executive Order 12866, this final rule 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 final rule 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 on the basis of a petition
under section 408(d) of FFDCA, such as
the tolerance 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 final rule 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
VerDate Mar<15>2010
15:02 Jul 13, 2010
Jkt 220001
and responsibilities established by
Congress in the preemption provisions
of section 408(n)(4) of FFDCA. 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 final rule. In addition, this final
rule does not impose any enforceable
duty or contain any unfunded mandate
as described under Title II of the
Unfunded Mandates Reform Act of 1995
(UMRA) (Public Law 104–4).
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 of 1995
(NTTAA), Public Law 104–113, section
12(d) (15 U.S.C. 272 note).
VII. Congressional Review Act
The Congressional Review Act, 5
U.S.C. 801 et seq., generally provides
that before a rule may take effect, the
agency promulgating the rule must
submit a rule report to each House of
the Congress and to the Comptroller
General of the United States. 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 this final rule in the
Federal Register. This final rule 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: July 1, 2010.
Lois Rossi,
Director, Registration Division, Office of
Pesticide Programs.
Therefore, 40 CFR chapter I is
amended as follows:
■
PO 00000
Frm 00027
Fmt 4700
Sfmt 4700
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, the table in paragraph
(a) is amended as follows:
i. Remove the entry for plum at 0.10
ppm and for plum, prune, fresh at 0.10
ppm;
ii. Revise the entry for Fruit, stone,
group 12, except plum; and
iii. Revise the entry for plum, prune,
dried.
The revisions read as follows:
■
§ 180.448 Hexythiazox; tolerances for
residues.
Commodity
Parts per million
*
*
*
Fruit, stone, group 12 .....
*
*
*
Plum, prune, dried ..........
*
*
*
*
*
*
*
*
*
*
*
1.0
*
1.3
*
*
[FR Doc. 2010–17034 Filed 7–13–10; 8:45 am]
BILLING CODE 6560–50–S
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 180
[EPA–HQ–OPP–2009–0801; FRL–8833–1]
Cyazofamid; Pesticide Tolerances
AGENCY: Environmental Protection
Agency (EPA).
ACTION: Final rule.
SUMMARY: This regulation establishes
tolerances for residues of cyazofamid in
or on Brassica, head and stem, subgroup
5A; Brassica, leafy greens, subgroup 5B;
turnip, greens; spinach; and hop, dried
cones. Interregional Research Project
Number 4 (IR-4) requested these
tolerances under the Federal Food,
Drug, and Cosmetic Act (FFDCA).
DATES: This regulation is effective July
14, 2010. Objections and requests for
hearings must be received on or before
September 13, 2010, 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: EPA has established a
docket for this action under docket
identification (ID) number EPA–HQ–
OPP–2009–0801. All documents in the
docket are listed in the docket index
available at https://www.regulations.gov.
Although listed in the index, some
information is not publicly available,
E:\FR\FM\14JYR1.SGM
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Agencies
[Federal Register Volume 75, Number 134 (Wednesday, July 14, 2010)]
[Rules and Regulations]
[Pages 40741-40745]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-17034]
-----------------------------------------------------------------------
ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 180
[EPA-HQ-OPP-2009-0325; FRL-8833-6]
Hexythiazox; Pesticide Tolerances
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: This regulation revises tolerances for combined residues of
hexythiazox in or on stone fruit. Gowan Company requested these
tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).
DATES: This regulation is effective July 14, 2010. Objections and
requests for hearings must be received on or before September 13, 2010,
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: EPA has established a docket for this action under docket
identification (ID) number EPA-HQ-OPP-2009-0325. All documents in the
docket are listed in the docket index available at https://www.regulations.gov. Although listed in the index, some information is
not publicly available, e.g., Confidential Business Information (CBI)
or other information whose disclosure is restricted by statute. Certain
other material, such as copyrighted material, is not placed on the
Internet and will be publicly available only in hard copy form.
Publicly available docket materials are available in the electronic
docket at https://www.regulations.gov, or, if only available in hard
copy, at the OPP Regulatory Public Docket in Rm. S-4400, One Potomac
Yard (South Bldg.), 2777 S. Crystal Dr., Arlington, VA. The Docket
Facility is open from 8:30 a.m. to 4 p.m., Monday through Friday,
excluding legal holidays. The Docket Facility telephone number is (703)
305-5805.
FOR FURTHER INFORMATION CONTACT: Olga Odiott, Registration Division
(7505P), Office of Pesticide Programs, Environmental Protection Agency,
1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; telephone
number: (703) 308-9369; e-mail address: odiott.olga@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.
Potentially affected entities may include, but are not limited to those
engaged in the following activities:
Crop production (NAICS code 111).
Animal production (NAICS code 112).
Food manufacturing (NAICS code 311).
Pesticide manufacturing (NAICS code 32532).
This listing is not intended to be exhaustive, but rather to
provide a guide for readers regarding entities likely to be affected by
this action. Other types of entities not listed in this unit could also
be affected. The North American Industrial Classification System
(NAICS) codes have been provided to assist you and others in
determining whether this action might apply to certain entities. If you
have any questions regarding the applicability of this action to a
particular entity, consult the person listed under FOR FURTHER
INFORMATION CONTACT.
B. How Can I Get Electronic Access to Other Related Information?
You may access a frequently updated electronic version of EPA's
tolerance regulations at 40 CFR part 180 through the Government
Printing Office's e-CFR site at https://www.gpoaccess.gov/ecfr.
C. How Can I File an Objection or Hearing Request?
Under FFDCA section 408(g), 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
[[Page 40742]]
provided in 40 CFR part 178. To ensure proper receipt by EPA, you must
identify docket ID number EPA-HQ-OPP-2009-0325 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 September 13, 2010. 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 that does not contain any 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 a copy of
your non-CBI objection or hearing request, identified by docket ID
number EPA-HQ-OPP-2009-0325, by one of the following methods:
Federal eRulemaking Portal: https://www.regulations.gov.
Follow the on-line instructions for submitting comments.
Mail: Office of Pesticide Programs (OPP) Regulatory Public
Docket (7502P), Environmental Protection Agency, 1200 Pennsylvania
Ave., NW., Washington, DC 20460-0001.
Delivery: OPP Regulatory Public Docket (7502P),
Environmental Protection Agency, Rm. S-4400, One Potomac Yard (South
Bldg.), 2777 S. Crystal Dr., Arlington, VA. Deliveries are only
accepted during the Docket Facility's normal hours of operation (8:30
a.m. to 4 p.m., Monday through Friday, excluding legal holidays).
Special arrangements should be made for deliveries of boxed
information. The Docket Facility telephone number is (703) 305-5805.
II. Summary of Petitioned-For Tolerance
In the Federal Register of August 19, 2009 (74 FR 41898) (FRL-8426-
7), EPA issued a notice pursuant to section 408(d)(3) of FFDCA, 21
U.S.C. 346a(d)(3), announcing the filing of a pesticide petition (PP
9F7556) by Gowan Company, 370 South Main Street, Yuma, AZ 85364. The
petition requested that 40 CFR 180.448 be amended by revising
tolerances for residues of the insecticide hexythiazox, (trans-5-(4-
chlorophenyl)-N-cyclohexyl-4-methyl-2-oxothiazolidine-3-carboxamide)
and its metabolites containing the (4-chlorophenyl)-4-methyl-2-oxo-3-
thiazolidine moiety, as follows: Revising the tolerance ``fruit, stone,
group 12, except plums'' to read `` fruit, stone, group 12; removing
the existing separate tolerance for fresh, prune, plums at 0.1 parts
per million (ppm); revising the tolerance in or on plum, prune, dried
from 0.4 to 1.3 ppm; and by revising the tolerance in or on grapes from
0.75 to 1.0 ppm. That notice referenced a summary of the petition
prepared by Gowan Company, the registrant, which is available in the
docket, https://www.regulations.gov. There were no comments received in
response to the notice of filing.
Based upon review of the data supporting the petition, EPA issued
a notice in the Federal Register of March 17, 2010 (75 FR 12691) (FRL-
8813-7), revising the tolerance for grapes and revising the tolerance
expression for hexythiazox. In that notice the Agency also announced
that the residue chemistry data were insufficient to support the
proposed revisions of the tolerances for the stone fruit use. Gowan
Company, the registrant, has submitted additional data to adequately
support the requested revisions to the stone fruit tolerances. This
action addresses the updated aggregate risk assessment incorporating
the revised dietary assessment on stone fruit.
III. 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 section 408(b)(2)(D) of FFDCA, and the factors
specified in section 408(b)(2)(D) of FFDCA, 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 for hexythiazox including
exposure resulting from the tolerances established by this action.
EPA's assessment of exposures and risks associated with hexythiazox
follows.
A. Toxicological Profile
EPA has evaluated the available toxicity data and considered its
validity, completeness, and reliability as well as the relationship of
the results of the studies to human risk. EPA has also considered
available information concerning the variability of the sensitivities
of major identifiable subgroups of consumers, including infants and
children. Hexythiazox has a low order of acute toxicity by the oral,
dermal and inhalation routes of exposure. It produces mild eye
irritation, is not a dermal irritant, and is negative for dermal
sensitization. Hexythiazox is not a developmental or reproductive
toxicant. The toxicology database for hexythiazox provides no
indication of increased susceptibility in rats or rabbits from in utero
and postnatal exposure to hexythiazox. The database does not show any
evidence of treatment-related effects on the nervous system or the
immune system. Hexythiazox is classified as ``Likely to be Carcinogenic
to Humans.'' EPA has determined that a non-quantitative risk assessment
approach (i.e., nonlinear, reference dose (RfD) approach) was
appropriate and protective of all chronic effects including potential
carcinogenicity of hexythiazox.
Specific information on the studies received and the nature of the
adverse effects caused by hexythiazox as well as the no-observed-
adverse-effect-level (NOAEL) and the lowest-observed-adverse-effect-
level (LOAEL) from the toxicity studies can be found in the final rule
published in the Federal Register of March 17, 2010 (75 FR 12691), and
at https://www.regulations.gov in document ``Hexythiazox. Human Health
Risk Assessment to Support Amended Use on Stone Fruit Reducing the
Preharvest Interval from 28-Days to 7-Days,'' p. 28 in docket ID number
EPA-HQ-OPP-2009-0325.
B. 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
[[Page 40743]]
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 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 can be found in the final rule published in the
Federal Register of March 17, 2010 (75 FR 12691), and at https://www.regulations.gov in document ``Hexythiazox. Human Health Risk
Assessment to Support Amended Use on Stone Fruit Reducing the
Preharvest Interval from 28-Days to 7-Days,'' p. 13 in docket ID number
EPA-HQ-OPP-2009-0325.
C. Exposure Assessment
1. Dietary exposure from food and feed uses. In evaluating dietary
exposure to hexythiazox, EPA considered exposure under the petitioned-
for tolerances 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. Quantitative acute dietary exposure and risk
assessments are performed for a food-use pesticide, if a toxicological
study has indicated the possibility of an effect of concern occurring
as a result of a 1-day or single exposure.
No such 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 United States
Department of Agriculture (USDA) 1994-1996 and 1998 CSFII. As to
residue levels in food, EPA used tolerance level residues, assumed 100
percent crop treated (PCT), and incorporated default processing
factors.
iii. Cancer. As discussed in this unit, EPA has determined that the
chronic RfD is sufficient to evaluate all chronic risks for this
chemical, including carcinogenic potential. Cancer risk was quantified
using the same estimates as discussed in Unit III.C.1.ii., chronic
exposure.
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/or 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 4.1 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 assessment.
The modeled estimate of drinking water concentrations was 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 not currently registered for any specific use
patterns that would result in residential exposure. However, the
following uses that could result in residential exposures are pending
registration in the near future and are included in this risk
assessment: Turf, gardens, ornamental landscape plantings, ornamental
plants, trees and vines in nurseries, residential fruit trees, nut
trees and caneberries, and orchids.
Both adults and children may be exposed to hexythiazox residues
from contact with treated lawns or treated plants. The exposure and
risk assessment included risks to adult handlers from inhalation
exposures. The exposure assessment for children included risks from
incidental oral exposure resulting from transfer of residues from the
hands or objects to the mouth, and from incidental ingestion of soil.
Details of the residential exposure and risk assessment are contained
in the final rule published in the Federal Register of March 17, 2010
(75 FR 12691), and at https://www.regulations.gov in document
``Hexythiazox. Human Health Risk Assessment to Support Amended Use on
Stone Fruit Reducing the Preharvest Interval from 28-Days to 7-Days,''
p. 19 in docket ID number EPA-HQ-OPP-2009-0325.
Further information regarding EPA standard assumptions and generic
inputs for residential exposures may be found at https://www.epa.gov/pesticides/trac/science/trac6a05.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 website at https://www.epa.gov/pesticides/cumulative.
D. 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
safety factor when reliable data available to EPA support the choice of
a different factor.
2. Prenatal and postnatal sensitivity. The prenatal and postnatal
toxicology data base indicates no increased
[[Page 40744]]
susceptibility of rats or rabbits to in utero and/or postnatal exposure
to hexythiazox.
3. Conclusion. EPA has determined that reliable data show 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:
i. The toxicity database for hexythiazox is incomplete under the
new 40 CFR part 158 data requirements for conventional pesticides,
which requires certain generic testing, including acute and subchronic
neurotoxicity studies and an immunotoxicity study. However, the
toxicology database does not show any evidence of treatment-related
effects on the nervous system or the immune system. The overall weight
of evidence suggests that this chemical does not directly target either
system. Although acute and subchronic neurotoxicity studies and an
immunotoxicity study are required as a part of new data requirements in
the 40 CFR part 158 for conventional pesticide registrations, the
Agency does not believe that conducting these studies will result in a
lower POD than any currently used for risk assessment, and therefore, a
database uncertainty factor (UFDB) is not needed to account
for the lack of these studies.
ii. There is no indication that hexythiazox is a neurotoxic
chemical and there is no need for a developmental neurotoxicity study
or additional UFs to account for neurotoxicity.
iii. There is no evidence that hexythiazox results in increased
susceptibility in 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. The dietary risk assessment is
highly conservative and not expected to underestimate risk. EPA made
conservative (protective) assumptions in the ground and surface water
modeling used to assess exposure to hexythiazox in drinking water.
These assessments will not underestimate the exposure and risks posed
by hexythiazox.
E. 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-term, intermediate-term, 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 and no acute dietary endpoint was selected. 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 49% of the cPAD for
(children 1-2 years old) the population group receiving the greatest
exposure. Based on the explanation in Unit III.C.3., regarding
residential use patterns, chronic residential exposure to residues of
hexythiazox is not expected.
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).
There are potential short-term exposures from the pending
residential uses for hexythiazox. 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 16,000 for adults
and 2,000 for children. Because EPA's level of concern for hexythiazox
is a MOE of 100 or below, these MOEs are not of concern.
4. Intermediate-term risk. Intermediate-term aggregate exposure
takes into account intermediate-term residential exposure plus chronic
exposure to food and water (considered to be a background exposure
level).
There are potential intermediate-term exposures from the pending
residential uses for hexythiazox. The Agency has determined that it is
appropriate to aggregate chronic exposure through food and water with
intermediate-term residential exposure 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 16,000 for adults and 2,200 for children. Because
EPA's level of concern for hexythiazox is a MOE of 100 or below, these
MOEs are not of concern.
5. Aggregate cancer risk for U.S. population. As discussed in Unit
III.A., and the Federal Register of March 17, 2010, (75 FR 12691), EPA
concluded that regulation based on the chronic reference dose will be
protective for both chronic and carcinogenic risks. As noted in this
unit there are no chronic 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.
IV. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology (high performance liquid
chromatography with ultra violet detection (HPLC/UV) is available to
enforce the tolerance expression. The method may be requested from:
Chief, Analytical Chemistry Branch, Environmental Science Center, 701
Mapes Rd., Ft. Meade, MD 20755-5350; telephone number: (410) 305-2905;
e-mail address: residuemethods@epa.gov.
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 U.S. 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.
Codex MRLs are established for residues of hexythiazox in or on
cherry and peach at 1.0 ppm, and plum (including prune) at 0.2 ppm.
There are no currently established Canadian or Mexican MRLs for
residues of hexythiazox for these crops. The Agency
[[Page 40745]]
has harmonized the residue level with established Codex MRLs on cherry
and peach, but notes that it is not possible to harmonize the tolerance
expression at this time as the Codex MRL includes parent only.
Additionally, it is not possible to harmonize with the codex MRL for
plums as the established Codex MRL of 0.2 ppm is too low to cover
residues that could result from the use of hexythiazox in the U.S.
V. Conclusion
Therefore, the tolerance for residues of hexythiazox, in or on
plum, prune, dried is revised from 0.4 ppm to 1.3 ppm; and the
tolerance for fruit, stone, group 12, except plum is revised to read
fruit, stone, group 12. The established tolerances for plum and for
plum, prune, fresh can be removed as these commodities are addressed by
the stone fruit group tolerance.
VI. Statutory and Executive Order Reviews
This final rule establishes tolerances under section 408(d) of
FFDCA in response to a petition submitted to the Agency. 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 final rule has been
exempted from review under Executive Order 12866, this final rule 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 final rule 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 on the basis
of a petition under section 408(d) of FFDCA, such as the tolerance 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 final rule 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 section 408(n)(4) of FFDCA. 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 final rule. In addition,
this final rule does not impose any enforceable duty or contain any
unfunded mandate as described under Title II of the Unfunded Mandates
Reform Act of 1995 (UMRA) (Public Law 104-4).
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 of 1995 (NTTAA), Public Law 104-113, section 12(d) (15 U.S.C. 272
note).
VII. Congressional Review Act
The Congressional Review Act, 5 U.S.C. 801 et seq., generally
provides that before a rule may take effect, the agency promulgating
the rule must submit a rule report to each House of the Congress and to
the Comptroller General of the United States. 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 this final rule in the Federal
Register. This final rule 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: July 1, 2010.
Lois Rossi,
Director, Registration Division, Office of Pesticide Programs.
0
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, the table in paragraph (a) is amended as follows:
i. Remove the entry for plum at 0.10 ppm and for plum, prune, fresh
at 0.10 ppm;
ii. Revise the entry for Fruit, stone, group 12, except plum; and
iii. Revise the entry for plum, prune, dried.
The revisions read as follows:
Sec. 180.448 Hexythiazox; tolerances for residues.
------------------------------------------------------------------------
Commodity Parts per million
------------------------------------------------------------------------
* * * * *
Fruit, stone, group 12............................... 1.0
* * * * *
Plum, prune, dried................................... 1.3
* * * * *
------------------------------------------------------------------------
* * * * *
[FR Doc. 2010-17034 Filed 7-13-10; 8:45 am]
BILLING CODE 6560-50-S