Dithianon; Pesticide Tolerances, 5518-5522 [2010-2145]
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Office of Pesticide Programs,
Environmental Protection Agency, 1200
Pennsylvania Ave., NW., Washington,
DC 20460–0001; telephone number:
(703) 305–5611; e-mail address:
kearns.rosemary@epa.gov.
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[FR Doc. 2010–2148 Filed 2–2–10; 8:45 am]
BILLING CODE 6560–50–S
ENVIRONMENTAL PROTECTION
AGENCY
SUPPLEMENTARY INFORMATION:
40 CFR Part 180
I. General Information
[EPA–HQ–OPP–2007–0460; FRL–8808–8]
A. Does this Action Apply to Me?
Dithianon; Pesticide Tolerances
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.
AGENCY: Environmental Protection
Agency (EPA).
ACTION: Final rule.
SUMMARY: This regulation establishes a
tolerance for residues of dithianon in or
on grapes that are imported. BASF
requested this tolerance under the
Federal Food, Drug, and Cosmetic Act
(FFDCA).
DATES: This regulation is effective
February 3, 2010. Objections and
requests for hearings must be received
on or before April 5, 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).
EPA has established a
docket for this action under docket
identification (ID) number EPA–HQ–
OPP–2007–0460 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: Rose
Kearns, Registration Division (7505P),
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ADDRESSES:
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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
cite at https://www.gpoaccess.gov/ecfr.
To access the OPPTS harmonized test
guidelines referenced in this document
electronically, please go to https://
www.epa.gov/oppts and select ‘‘Test
Methods & Guidelines’’ on the left-side
navigation menu.
C. Can I File an Objection or Hearing
Request?
Under section 408(g) of 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
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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–2007–0460 in the subject line on
the first page of your submission. All
requests must be in writing, and must be
mailed or delivered to the Hearing Clerk
as required by 40 CFR part 178 on or
before April 5, 2010.
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 that is described in
ADDRESSES. Information not marked
confidential pursuant to 40 CFR part 2
may be disclosed publicly by EPA
without prior notice. Submit this copy,
identified by docket ID number EPA–
HQ–OPP–2007–0460, 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. Petition for Tolerance
In the Federal Register of November
4, 2009 (74 FR 57170) (FRL–8797–7),
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 6E7103) by BASF
Corporation, 26 Davis Drive, P.O. Box
13528, Research Triangle Park, NC
27709–3528. The petition requested that
40 CFR 180.621 be amended by
establishing a tolerance for residues of
the fungicide dithianon, 5,10-dihydro-510-dioxonaptho(2,3-b)-1,4-dithiin-2,3-
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dicarbonitrile, in or on grapes at 3 parts
per million (ppm). That notice
referenced a summary of the petition
prepared by BASF, the registrant, which
is available to the public in the docket,
https://www.regulations.gov. There were
no comments received in response to
the notice of filing.
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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 the petitioned-for
tolerance, for residues of dithianon on
grape at 3 ppm. EPA’s assessment of
exposures and risks associated with
establishing tolerances 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.
The acute toxicity is mild via the oral
route. The toxicologically significant
adverse effects of dithianon are similar
across species. In studies with shorter
durations of exposure, including the
subchronic dog and rat studies, the
developmental toxicity study in rats,
and the 2-generation reproduction rat
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study, decreases in body weight, body
weight gain, and/or food consumption
were noted in adults. However, with
continued exposure, as in the chronic
and/or carcinogenicity studies in the rat,
mouse, and dog, the kidney is the target
organ for toxicity. Signs of renal toxicity
include increased absolute and/or
relative kidney weights in the rat,
mouse, and dog; non-neoplastic kidney
lesions in mice and rats; and renal
adenomas and carcinomas in female
rats. Post-implantation loss due to early
resorptions was observed in the
developmental rat study.
The available toxicology database
does not show any indication of
increased qualitative or quantitative
susceptibility of the offspring. Dithianon
did not cause reproductive or
developmental toxicity in the 2generation reproduction study. In the
developmental rat study, decreased fetal
weights were observed only at a dose
higher than that which produced similar
maternal effects. The developmental
toxicity study in rabbits was classified
unacceptable/guideline.
Carcinogenicity studies in rats and
mice do not raise a concern as to
carcinogenicity. The only treatmentrelated tumors, rare kidney tumors,
(primarily adenomas), were seen only at
the highest dose tested (30 milligram/
kilogram/day (mg/kg/day)) in one sex
(females) and in one species (rats). The
highest dose tested was considered
adequate, but not excessive, to assess
the carcinogenicity of dithianon;
however, significant renal toxicity
occurred at this dose, which may have
contributed to the tumor formulation.
Although the Agency concluded that
there was not a sufficient or cohesive
dataset at the time to fully support a
mode of action, it is biologically
plausible that the tumors were caused
by a non-genotoxic mode of action
involving hephrotoxicity and sustained
regenerative proliferation. Further,
dithianon is not mutagenic. Dithianon
produced positive results in an
acceptable chromosomal aberration
assay that was conducted in vitro using
Chinese hamster lung fibroblasts (V79
cells); in contrast, a forward gene
mutation assay tested in this same cell
line was negative. A second forward
gene mutation assay with V79 cells was
also negative, but it was classified
unacceptable due to inadequate
cytotoxicity at the highest concentration
tested. Negative responses were seen in
bacteria (two acceptable reverse gene
mutation assays in Salmonella), Wistar
rat systems (an acceptable in vivo
cytogenetic assay and an acceptable in
vitro UDS assay), and NMRI mice (an
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unacceptable in vivo micronucleus
assay).
Specific information on the studies
received and the nature of the adverse
effects caused by dithianon as well as
the no-observed-adverse-effect-level
(NOAEL) and the lowest-observedadverse-effect-level (LOAEL) from the
toxicity studies can be found at https://
www.regulations.gov in the document
‘‘Dithianon-Human Health Risk
Assessment for Proposed Tolerance on
Imported Grapes,’’ at pages 9–12 in
docket ID number EPA–HQ–OPP–2007–
0460.
B. Toxicological Endpoints
For hazards that have a threshold
below which there is no appreciable
risk, a toxicological point of departure
(POD) is identified as the basis for
derivation of reference values for risk
assessment. The POD may be defined as
the highest dose at which the NOAEL in
the toxicology study identified as
appropriate for use in risk assessment.
However, if a NOAEL cannot be
determined, the lowest dose at which
adverse effects of concern are identified
(the LOAEL) or a benchmark dose
(BMD) approach is sometimes used for
risk assessment. Uncertainty/safety
factors (UFs) are used in conjunction
with the POD to take into account
uncertainties inherent in the
extrapolation from laboratory animal
data to humans and in the variations in
sensitivity among members of the
human population as well as other
unknowns. Safety is assessed for acute
and chronic dietary risks by comparing
aggregate food and water exposure to
the pesticide to the acute population
adjusted dose (aPAD) and chronic
population adjusted dose (cPAD). The
aPAD and cPAD are calculated by
dividing the POD by all applicable UFs.
Aggregate short-, intermediate-, and
chronic-term risks are evaluated by
comparing food, water, and residential
exposure to the POD to ensure that the
margin of exposure (MOE) called for by
the product of all applicable UFs is not
exceeded. This latter value is referred to
as the level of concern (LOC).
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 greater than that 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 dithianon used for human
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risk assessment can be found at https://
www.regulations.gov in the document
‘‘Dithianon — Human Health Risk
Assessment for Proposed Tolerance on
Imported Grapes,’’ at pages 20–24 in
docket ID number EPA–HQ–OPP–2007–
0460.
C. Exposure Assessment
1. Dietary exposure from food and
feed uses. In evaluating dietary
exposure to dithianon, EPA considered
exposure under the petitioned-for
tolerances as well as all existing
dithianon tolerances in (40 CFR
180.621). EPA assessed dietary
exposures from dithianon 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
applicable to the general population in
the toxicological studies for dithianon;
therefore, a quantitative acute dietary
exposure assessment is unnecessary.
However an endpoint was identified for
females 13–49 years of age. In
conducting the acute dietary exposure
assessment EPA used the Dietary
Exposure Evaluation Model-Food
Commodity Intake Database (DEEMFCID, version 2.03). EPA assumed that
dithianon is used on all crops covered
by tolerances and that all treated crops
bear tolerance-level residues.
ii. Chronic exposure. In conducting
the chronic dietary exposure assessment
EPA used the DEEM-FCID, version 2.03.
EPA assumed that dithianon is used on
all crops covered by tolerances and that
all treated crops bear average values
from crop residue field trials.
iii. Cancer. For the reasons explained
in Unit III.A., EPA has concluded that
dithianon does not pose a cancer risk
and therefore an exposure assessment
for the purpose of evaluating cancer risk
is unnecessary.
iv. Anticipated residue information.
Section 408(b)(2)(E) of FFDCA
authorizes EPA to use available data and
information on the anticipated residue
levels of pesticide residues in food and
the actual levels of pesticide residues
that have been measured in food. If EPA
relies on such information, EPA must
require pursuant to FFDCA section
408(f)(1) that data be provided 5 years
after the tolerance is established,
modified, or left in effect, demonstrating
that the levels in food are not above the
levels anticipated. For the present
action, EPA will issue such data call-ins
as are required by FFDCA section
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408(b)(2)(E) and authorized under
FFDCA section 408(f)(1). Data will be
required to be submitted no later than
5 years from the date of issuance of
these tolerances.
2. Dietary exposure from drinking
water. Current and proposed tolerances
for dithianon are intended to support
imported commodities only and there
are no existing or proposed U.S.
registrations. Therefore, there is no
expectation that dithianon residues
would occur in surface or ground water
sources of drinking water.
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).
Dithianon is not registered for any
specific use patterns that would result
in residential exposure.
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 dithianon to share
a common mechanism of toxicity with
any other substances, and dithianon
does not appear to produce a toxic
metabolite produced by other
substances. For the purposes of this
tolerance action, therefore, EPA has
assumed that dithianon 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
FQPA SF. In applying this provision,
EPA either retains the default value of
10X, or uses a different additional safety
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factor when reliable data available to
EPA support the choice of a different
factor.
2. Prenatal and postnatal sensitivity.
There is no indication of increased
quantitative or qualitative susceptibility
of rats to in utero and/or postnatal
exposure to dithianon.
3. Conclusion. The FQPA Safety
Factor will be retained at 10X as a
database uncertainty factor for acute and
chronic assessments. The primary
reason for retaining the FQPA safety
factor is residual uncertainty concerning
lack of an acceptable rabbit
development study. In deciding to
retain the safety factor EPA also took
into account the following
considerations:
i. Immunotoxicity testing is required
as a result of changes made to the
pesticide data requirements in
December 2007. Although a study has
not yet been submitted, there is no
evidence of immunotoxicity in any
study in the toxicity database for
dithianon and the Agency does not
believe that conducting an
immunotoxicity study will result in a
lower POD than that currently used for
overall risk assessment. Therefore, a
database uncertainty factor (UFDB ) is
not needed to account for the lack of
this study.
ii. Acute and subchronic
neurotoxicity testing is required as a
result of changes made to the pesticide
data requirements in December 2007.
Although these studies have not yet
been submitted, there is no evidence of
neurotoxicity in any study in the
toxicity database for dithianon and the
Agency does not believe that conducting
these studies will result in a lower POD
than that currently used for overall risk
assessment. Therefore, a UFDB is not
needed to account for the lack of this
study. For the same reason, EPA has
determined that there is no need for a
developmental neurotoxicity study.
iii. There is no evidence that
dithianon results in increased
susceptibility in in utero rats or rabbits
in the prenatal developmental study 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% CT and
tolerance-level residues for the acute
analysis and reliable data on average
field trial residues in the chronic
analysis. The exposure assessments will
not understate exposure to dithianon.
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E. Aggregate Risks and Determination of
Safety
EPA determines whether acute and
chronic pesticide exposures are safe by
comparing aggregate exposure estimates
to the aPAD and cPAD. The aPAD and
cPAD represent the highest safe
exposures, taking into account all
appropriate SFs. EPA calculates the
aPAD and cPAD by dividing the POD by
all applicable UFs. For linear cancer
risks, EPA calculates the probability of
additional cancer cases 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 POD to
ensure that the MOE called for by the
product of all applicable UFs is not
exceeded.
1. Acute risk. Using the exposure
assumptions discussed in this unit for
acute exposure, the acute dietary
exposure from food and water to
dithianon will occupy 79% of the aPAD
for (females 13–49 years of age at the
95th percentile of exposure) the
population group receiving the greatest
exposure.
2. Chronic risk. The exposure for all
populations assessed are below the level
of concern. The exposure for the general
U.S. population is at 18% of cPAD. The
most highly exposed sub-group is
children ( 1–2 years old), whose
exposure is at 63% of the cPAD. This
assessment is slightly refined with use
of average residue values and empirical
processing factors, but is still highly
conservative with the assumption of
100% CT. There are no residential uses
for dithianon.
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).
Dithianon is not registered for any use
patterns that would result in residential
exposure. Therefore, the short-term
aggregate risk is the sum of the risk from
exposure to dithianon through food and
water and will not be greater than the
chronic aggregate risk.
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).
Dithianon is not registered for any use
patterns that would result in
intermediate-term residential exposure.
Therefore, the intermediate-term
aggregate risk is the sum of the risk from
exposure to dithianon through food and
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water, which has already been
addressed, and will not be greater than
the chronic aggregate risk.
5. Aggregate cancer risk for U.S.
population. As described in Unit III.A.
above, dithianon is not expected to pose
a cancer risk.
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 dithianon
residues.
IV. Other Considerations
A. Analytical Enforcement Methodology
An adequate methodology LC/MS/MS
method (BASF 244882) is available for
enforcing the proposed tolerance on
grapes. Adequate multi-residue method
testing data are available for dithianon
and these data have been forwarded to
the FDA for evaluation. The data
indicate that FDA multi-residue
methods are not suitable for
determining residues of dithianon.
B. International Residue Limits
There are currently no established
Canadian or Mexican maximum residue
limits (MRLs) for dithianon on grapes.
There are no harmonization concerns
with MRL’s on grapes established by
Codex and the European Union because
the grape tolerance being established is
equivalent to these MRLs both in terms
of residue expression and residue level.
C. Revisions to Petitioned-For
Tolerances
EPA has revised the dithianon
tolerance expression to clarify the
chemical moieties that are covered by
the tolerances and specify how
compliance with the tolerances is to be
measured. The revised tolerance
expression makes clear that the
tolerances cover residues of dithianon
and its metabolites and degradates but
that compliance with tolerance levels
will be determined by measuring only
dithianon, (5,10-dihydro-5,10dioxonaphtho(2-3-b)-1,4-dithiin-2,3dicarbonitrile), in or on the
commodities that have an established
tolerance level. EPA has determined
that it is reasonable to make this change
final without prior proposal and
opportunity for comment, because
public comment is not necessary, in that
the change has no substantive effect on
the tolerance, but rather is merely
intended to clarify the existing tolerance
expression.
V. Conclusion
Therefore, tolerances are established
for residues of dithianon, 5,10-dihydro-
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5,10-dioxonaphtho(2,3-b)-1,4-dithiin2,3-dicarbonitrile, in or on grapes at 3
ppm.
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
E:\FR\FM\03FER1.SGM
03FER1
5522
Federal Register / Vol. 75, No. 22 / Wednesday, February 3, 2010 / Rules and Regulations
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: January 25, 2010.
Lois Rossi,
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. Section 180.621 is revised to read
as follows:
■
WReier-Aviles on DSKGBLS3C1PROD with RULES
§ 180.621
residues.
Dithianon; tolerances for
(a) General. Tolerances are
established for residues of dithianon,
including its metabolites and
degradates, in or on the commodities in
the table below. Compliance with the
tolerance levels specified below is to be
determined by measuring only
dithianon, 5, 10-dihydro-5,10dioxonaphtho(2,3-b)-1,4-dithiin-2,3dicarbonitrile.
VerDate Nov<24>2008
14:52 Feb 02, 2010
Jkt 220001
(CBI) or other information whose
disclosure is restricted by statute.
Certain other material, such as
Fruit, pome, group 111 .........
5 copyrighted material, is not placed on
Grape 2 .................................
3 the Internet and will be publicly
Hop, dried cones1 .................
100
available only in hard copy form.
Publicly available docket materials are
1No U.S. registration as of September 5,
available in the electronic docket at
2006.
2No U.S. registration as of January 29,
https://www.regulations.gov, or, if only
available in hard copy, at the OPP
2010.
Regulatory Public Docket in Rm. S–
(b)Section 18 emergency exemptions.
4400, One Potomac Yard (South Bldg.),
[Reserved]
2777 S. Crystal Dr., Arlington, VA. The
(c) Tolerances with regional
Docket Facility is open from 8:30 a.m.
registrations. [Reserved]
to 4 p.m., Monday through Friday,
(d) Indirect or inadvertent residues.
excluding legal holidays. The Docket
[Reserved]
Facility telephone number is (703) 305–
[FR Doc. 2010–2145 Filed 2–2–10; 8:45 am]
5805.
BILLING CODE 6560–50–S
FOR FURTHER INFORMATION CONTACT:
Jennifer Gaines, Registration Division
(7505P), Office of Pesticide Programs,
ENVIRONMENTAL PROTECTION
Environmental Protection Agency, 1200
AGENCY
Pennsylvania Ave., NW., Washington,
DC 20460–0001; telephone number:
40 CFR Part 180
(703) 305-5967; e-mail address:
[EPA–HQ–OPP–2008–0262; FRL–8436–9]
gaines.jennifer@epa.gov.
Spiromesifen; Pesticide Tolerances
SUPPLEMENTARY INFORMATION:
Parts per
million
Commodity
AGENCY: Environmental Protection
Agency (EPA).
ACTION: Final rule.
SUMMARY: This regulation establishes
tolerances for the inadvertent or indirect
combined residues of spiromesifen (2oxo-3-(2,4,6-trimethylphenyl)-1oxaspiro[4.4]non-3-en-4-yl 3,3dimethylbutanoate) its enol metabolite
(4-hydroxy-3-(2,4,6-trimethylphenyl)-1oxaspiro[4.4]non-3-en-2-one), and its
metabolites containing the 4hydroxymethyl moiety (4-hydroxy-3-[4(hydroxymethyl)-2,6-dimethylphenyl]1-oxaspiro[4.4]non-3-en-2-one),
calculated as the parent compound
equivalents, in or on the following
commodities from crops grown as
rotational crops: bulb vegetables. Bayer
CropScience requested these tolerances
under the Federal Food, Drug, and
Cosmetic Act (FFDCA).
DATES: This regulation is effective
February 3, 2010. Objections and
requests for hearings must be received
on or before April 5, 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–2008–0262. 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
PO 00000
Frm 00036
Fmt 4700
Sfmt 4700
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 Access Electronic Copies
of this Document?
In addition to accessing electronically
available documents at https://
www.regulations.gov, you may access
this Federal Register document
electronically through the EPA Internet
under the ‘‘Federal Register’’ listings at
E:\FR\FM\03FER1.SGM
03FER1
Agencies
[Federal Register Volume 75, Number 22 (Wednesday, February 3, 2010)]
[Rules and Regulations]
[Pages 5518-5522]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-2145]
-----------------------------------------------------------------------
ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 180
[EPA-HQ-OPP-2007-0460; FRL-8808-8]
Dithianon; Pesticide Tolerances
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: This regulation establishes a tolerance for residues of
dithianon in or on grapes that are imported. BASF requested this
tolerance under the Federal Food, Drug, and Cosmetic Act (FFDCA).
DATES: This regulation is effective February 3, 2010. Objections and
requests for hearings must be received on or before April 5, 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-2007-0460 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: Rose Kearns, Registration Division
(7505P), Office of Pesticide Programs, Environmental Protection Agency,
1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; telephone
number: (703) 305-5611; e-mail address: kearns.rosemary@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 cite at https://www.gpoaccess.gov/ecfr. To
access the OPPTS harmonized test guidelines referenced in this document
electronically, please go to https://www.epa.gov/oppts and select ``Test
Methods & Guidelines'' on the left-side navigation menu.
C. Can I File an Objection or Hearing Request?
Under section 408(g) of 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-2007-0460 in the subject line on the first
page of your submission. All requests must be in writing, and must be
mailed or delivered to the Hearing Clerk as required by 40 CFR part 178
on or before April 5, 2010.
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 that is described in ADDRESSES. Information not marked
confidential pursuant to 40 CFR part 2 may be disclosed publicly by EPA
without prior notice. Submit this copy, identified by docket ID number
EPA-HQ-OPP-2007-0460, 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. Petition for Tolerance
In the Federal Register of November 4, 2009 (74 FR 57170) (FRL-
8797-7), 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
6E7103) by BASF Corporation, 26 Davis Drive, P.O. Box 13528, Research
Triangle Park, NC 27709-3528. The petition requested that 40 CFR
180.621 be amended by establishing a tolerance for residues of the
fungicide dithianon, 5,10-dihydro-5-10-dioxonaptho(2,3-b)-1,4-dithiin-
2,3-
[[Page 5519]]
dicarbonitrile, in or on grapes at 3 parts per million (ppm). That
notice referenced a summary of the petition prepared by BASF, the
registrant, which is available to the public in the docket, https://www.regulations.gov. There were no comments received in response to the
notice of filing.
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 the petitioned-for
tolerance, for residues of dithianon on grape at 3 ppm. EPA's
assessment of exposures and risks associated with establishing
tolerances 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.
The acute toxicity is mild via the oral route. The toxicologically
significant adverse effects of dithianon are similar across species. In
studies with shorter durations of exposure, including the subchronic
dog and rat studies, the developmental toxicity study in rats, and the
2-generation reproduction rat study, decreases in body weight, body
weight gain, and/or food consumption were noted in adults. However,
with continued exposure, as in the chronic and/or carcinogenicity
studies in the rat, mouse, and dog, the kidney is the target organ for
toxicity. Signs of renal toxicity include increased absolute and/or
relative kidney weights in the rat, mouse, and dog; non-neoplastic
kidney lesions in mice and rats; and renal adenomas and carcinomas in
female rats. Post-implantation loss due to early resorptions was
observed in the developmental rat study.
The available toxicology database does not show any indication of
increased qualitative or quantitative susceptibility of the offspring.
Dithianon did not cause reproductive or developmental toxicity in the
2-generation reproduction study. In the developmental rat study,
decreased fetal weights were observed only at a dose higher than that
which produced similar maternal effects. The developmental toxicity
study in rabbits was classified unacceptable/guideline.
Carcinogenicity studies in rats and mice do not raise a concern as
to carcinogenicity. The only treatment-related tumors, rare kidney
tumors, (primarily adenomas), were seen only at the highest dose tested
(30 milligram/kilogram/day (mg/kg/day)) in one sex (females) and in one
species (rats). The highest dose tested was considered adequate, but
not excessive, to assess the carcinogenicity of dithianon; however,
significant renal toxicity occurred at this dose, which may have
contributed to the tumor formulation. Although the Agency concluded
that there was not a sufficient or cohesive dataset at the time to
fully support a mode of action, it is biologically plausible that the
tumors were caused by a non-genotoxic mode of action involving
hephrotoxicity and sustained regenerative proliferation. Further,
dithianon is not mutagenic. Dithianon produced positive results in an
acceptable chromosomal aberration assay that was conducted in vitro
using Chinese hamster lung fibroblasts (V79 cells); in contrast, a
forward gene mutation assay tested in this same cell line was negative.
A second forward gene mutation assay with V79 cells was also negative,
but it was classified unacceptable due to inadequate cytotoxicity at
the highest concentration tested. Negative responses were seen in
bacteria (two acceptable reverse gene mutation assays in Salmonella),
Wistar rat systems (an acceptable in vivo cytogenetic assay and an
acceptable in vitro UDS assay), and NMRI mice (an unacceptable in vivo
micronucleus assay).
Specific information on the studies received and the nature of the
adverse effects caused by dithianon 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 at https://www.regulations.gov in the document ``Dithianon-Human Health Risk
Assessment for Proposed Tolerance on Imported Grapes,'' at pages 9-12
in docket ID number EPA-HQ-OPP-2007-0460.
B. Toxicological Endpoints
For hazards that have a threshold below which there is no
appreciable risk, a toxicological point of departure (POD) is
identified as the basis for derivation of reference values for risk
assessment. The POD may be defined as the highest dose at which the
NOAEL in the toxicology study identified as appropriate for use in risk
assessment. However, if a NOAEL cannot be determined, the lowest dose
at which adverse effects of concern are identified (the LOAEL) or a
benchmark dose (BMD) approach is sometimes used for risk assessment.
Uncertainty/safety factors (UFs) are used in conjunction with the POD
to take into account uncertainties inherent in the extrapolation from
laboratory animal data to humans and in the variations in sensitivity
among members of the human population as well as other unknowns. Safety
is assessed for acute and chronic dietary risks by comparing aggregate
food and water exposure to the pesticide to the acute population
adjusted dose (aPAD) and chronic population adjusted dose (cPAD). The
aPAD and cPAD are calculated by dividing the POD by all applicable UFs.
Aggregate short-, intermediate-, and chronic-term risks are evaluated
by comparing food, water, and residential exposure to the POD to ensure
that the margin of exposure (MOE) called for by the product of all
applicable UFs is not exceeded. This latter value is referred to as the
level of concern (LOC).
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
greater than that 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 dithianon used for
human
[[Page 5520]]
risk assessment can be found at https://www.regulations.gov in the
document ``Dithianon -- Human Health Risk Assessment for Proposed
Tolerance on Imported Grapes,'' at pages 20-24 in docket ID number EPA-
HQ-OPP-2007-0460.
C. Exposure Assessment
1. Dietary exposure from food and feed uses. In evaluating dietary
exposure to dithianon, EPA considered exposure under the petitioned-for
tolerances as well as all existing dithianon tolerances in (40 CFR
180.621). EPA assessed dietary exposures from dithianon 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 applicable to the general
population in the toxicological studies for dithianon; therefore, a
quantitative acute dietary exposure assessment is unnecessary. However
an endpoint was identified for females 13-49 years of age. In
conducting the acute dietary exposure assessment EPA used the Dietary
Exposure Evaluation Model-Food Commodity Intake Database (DEEM-FCID,
version 2.03). EPA assumed that dithianon is used on all crops covered
by tolerances and that all treated crops bear tolerance-level residues.
ii. Chronic exposure. In conducting the chronic dietary exposure
assessment EPA used the DEEM-FCID, version 2.03. EPA assumed that
dithianon is used on all crops covered by tolerances and that all
treated crops bear average values from crop residue field trials.
iii. Cancer. For the reasons explained in Unit III.A., EPA has
concluded that dithianon does not pose a cancer risk and therefore an
exposure assessment for the purpose of evaluating cancer risk is
unnecessary.
iv. Anticipated residue information. Section 408(b)(2)(E) of FFDCA
authorizes EPA to use available data and information on the anticipated
residue levels of pesticide residues in food and the actual levels of
pesticide residues that have been measured in food. If EPA relies on
such information, EPA must require pursuant to FFDCA section 408(f)(1)
that data be provided 5 years after the tolerance is established,
modified, or left in effect, demonstrating that the levels in food are
not above the levels anticipated. For the present action, EPA will
issue such data call-ins as are required by FFDCA section 408(b)(2)(E)
and authorized under FFDCA section 408(f)(1). Data will be required to
be submitted no later than 5 years from the date of issuance of these
tolerances.
2. Dietary exposure from drinking water. Current and proposed
tolerances for dithianon are intended to support imported commodities
only and there are no existing or proposed U.S. registrations.
Therefore, there is no expectation that dithianon residues would occur
in surface or ground water sources of drinking water.
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).
Dithianon is not registered for any specific use patterns that
would result in residential exposure.
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 dithianon to share a common mechanism of toxicity
with any other substances, and dithianon does not appear to produce a
toxic metabolite produced by other substances. For the purposes of this
tolerance action, therefore, EPA has assumed that dithianon 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 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. There is no indication of
increased quantitative or qualitative susceptibility of rats to in
utero and/or postnatal exposure to dithianon.
3. Conclusion. The FQPA Safety Factor will be retained at 10X as a
database uncertainty factor for acute and chronic assessments. The
primary reason for retaining the FQPA safety factor is residual
uncertainty concerning lack of an acceptable rabbit development study.
In deciding to retain the safety factor EPA also took into account the
following considerations:
i. Immunotoxicity testing is required as a result of changes made
to the pesticide data requirements in December 2007. Although a study
has not yet been submitted, there is no evidence of immunotoxicity in
any study in the toxicity database for dithianon and the Agency does
not believe that conducting an immunotoxicity study will result in a
lower POD than that currently used for overall risk assessment.
Therefore, a database uncertainty factor (UFDB ) is not needed to
account for the lack of this study.
ii. Acute and subchronic neurotoxicity testing is required as a
result of changes made to the pesticide data requirements in December
2007. Although these studies have not yet been submitted, there is no
evidence of neurotoxicity in any study in the toxicity database for
dithianon and the Agency does not believe that conducting these studies
will result in a lower POD than that currently used for overall risk
assessment. Therefore, a UFDB is not needed to account for the lack of
this study. For the same reason, EPA has determined that there is no
need for a developmental neurotoxicity study.
iii. There is no evidence that dithianon results in increased
susceptibility in in utero rats or rabbits in the prenatal
developmental study 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% CT and tolerance-level residues for the acute analysis and
reliable data on average field trial residues in the chronic analysis.
The exposure assessments will not understate exposure to dithianon.
[[Page 5521]]
E. Aggregate Risks and Determination of Safety
EPA determines whether acute and chronic pesticide exposures are
safe by comparing aggregate exposure estimates to the aPAD and cPAD.
The aPAD and cPAD represent the highest safe exposures, taking into
account all appropriate SFs. EPA calculates the aPAD and cPAD by
dividing the POD by all applicable UFs. For linear cancer risks, EPA
calculates the probability of additional cancer cases 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 POD to ensure that the MOE called for
by the product of all applicable UFs is not exceeded.
1. Acute risk. Using the exposure assumptions discussed in this
unit for acute exposure, the acute dietary exposure from food and water
to dithianon will occupy 79% of the aPAD for (females 13-49 years of
age at the 95th percentile of exposure) the population group receiving
the greatest exposure.
2. Chronic risk. The exposure for all populations assessed are
below the level of concern. The exposure for the general U.S.
population is at 18% of cPAD. The most highly exposed sub-group is
children ( 1-2 years old), whose exposure is at 63% of the cPAD. This
assessment is slightly refined with use of average residue values and
empirical processing factors, but is still highly conservative with the
assumption of 100% CT. There are no residential uses for dithianon.
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).
Dithianon is not registered for any use patterns that would result
in residential exposure. Therefore, the short-term aggregate risk is
the sum of the risk from exposure to dithianon through food and water
and will not be greater than the chronic aggregate risk.
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).
Dithianon is not registered for any use patterns that would result
in intermediate-term residential exposure. Therefore, the intermediate-
term aggregate risk is the sum of the risk from exposure to dithianon
through food and water, which has already been addressed, and will not
be greater than the chronic aggregate risk.
5. Aggregate cancer risk for U.S. population. As described in Unit
III.A. above, dithianon is not expected to pose a cancer risk.
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 dithianon residues.
IV. Other Considerations
A. Analytical Enforcement Methodology
An adequate methodology LC/MS/MS method (BASF 244882) is available
for enforcing the proposed tolerance on grapes. Adequate multi-residue
method testing data are available for dithianon and these data have
been forwarded to the FDA for evaluation. The data indicate that FDA
multi-residue methods are not suitable for determining residues of
dithianon.
B. International Residue Limits
There are currently no established Canadian or Mexican maximum
residue limits (MRLs) for dithianon on grapes. There are no
harmonization concerns with MRL's on grapes established by Codex and
the European Union because the grape tolerance being established is
equivalent to these MRLs both in terms of residue expression and
residue level.
C. Revisions to Petitioned-For Tolerances
EPA has revised the dithianon tolerance expression to clarify the
chemical moieties that are covered by the tolerances and specify how
compliance with the tolerances is to be measured. The revised tolerance
expression makes clear that the tolerances cover residues of dithianon
and its metabolites and degradates but that compliance with tolerance
levels will be determined by measuring only dithianon, (5,10-dihydro-
5,10-dioxonaphtho(2-3-b)-1,4-dithiin-2,3-dicarbonitrile), in or on the
commodities that have an established tolerance level. EPA has
determined that it is reasonable to make this change final without
prior proposal and opportunity for comment, because public comment is
not necessary, in that the change has no substantive effect on the
tolerance, but rather is merely intended to clarify the existing
tolerance expression.
V. Conclusion
Therefore, tolerances are established for residues of dithianon,
5,10-dihydro-5,10-dioxonaphtho(2,3-b)-1,4-dithiin-2,3-dicarbonitrile,
in or on grapes at 3 ppm.
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
[[Page 5522]]
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: January 25, 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. Section 180.621 is revised to read as follows:
Sec. 180.621 Dithianon; tolerances for residues.
(a) General. Tolerances are established for residues of dithianon,
including its metabolites and degradates, in or on the commodities in
the table below. Compliance with the tolerance levels specified below
is to be determined by measuring only dithianon, 5, 10-dihydro-5,10-
dioxonaphtho(2,3-b)-1,4-dithiin-2,3-dicarbonitrile.
------------------------------------------------------------------------
Parts per
Commodity million
------------------------------------------------------------------------
Fruit, pome, group 11\1\................................ 5
Grape \2\............................................... 3
Hop, dried cones\1\..................................... 100
------------------------------------------------------------------------
\1\No U.S. registration as of September 5, 2006.
\2\No U.S. registration as of January 29, 2010.
(b)Section 18 emergency exemptions. [Reserved]
(c) Tolerances with regional registrations. [Reserved]
(d) Indirect or inadvertent residues. [Reserved]
[FR Doc. 2010-2145 Filed 2-2-10; 8:45 am]
BILLING CODE 6560-50-S