Quizalofop ethyl; Pesticide Tolerance, 56374-56378 [06-8253]
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rule is not a ‘‘major rule’’ as defined by
5 U.S.C. 804(2).
ENVIRONMENTAL PROTECTION
AGENCY
List of Subjects 40 CFR Part 180
40 CFR Part 180
Environmental protection,
Administrative practice and procedure,
Agricultural commodities, Pesticides
and pests, Reporting and recordkeeping
requirements.
Dated: September 19, 2006.
Lois Rossi,
Director, Registration Division, Office of
Pesticide Programs.
Therefore, 40 CFR chapter I is
amended as follows:
I
PART 180—[AMENDED]
1. The authority citation for part 180
continues to read as follows:
I
Authority: 21 U.S.C. 321(q), 346a and 371.
2. Section 180.361 is amended by
adding entries to the table in paragraph
(a) to read as follows:
I
§ 180.361 Pendimethalin, Tolerances for
Residues.
(a) *
*
*
Parts
per
million
Commodity
Alfalfa, Forage .....................................
Alfalfa, Hay ..........................................
Alfalfa, Seed ........................................
Apple, wet pomace ..............................
*
*
*
*
*
Fruit, pome, group 11 ..........................
Fruit, stone, group 12 ..........................
*
*
*
*
*
Juneberry .............................................
Leek .....................................................
*
*
*
*
*
Onion, green ........................................
Onion, welsh ........................................
*
*
*
*
*
Pomegranate .......................................
*
*
*
*
*
Shallot ..................................................
*
*
*
*
*
Strawberry ...........................................
*
*
*
*
*
Vegetable, fruiting, group 8 .................
Wheat, grain ........................................
Wheat, forage ......................................
Wheat, hay ..........................................
Wheat, straw .......................................
3.0
4.0
0.10
0.20
0.10
0.10
0.10
0.20
0.20
0.20
0.10
0.2
0.10
0.10
0.10
3.0
0.60
0.30
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[FR Doc. 06–8254 Filed 9–26–06; 8:45 am]
BILLING CODE 6560–50–S
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[EPA–HQ–OPP–2006–0204; FRL–8094–5]
Quizalofop ethyl; Pesticide Tolerance
Environmental Protection
Agency (EPA).
ACTION: Final rule.
AGENCY:
SUMMARY: This regulation establishes a
tolerance for combined residues of
quizalofop ethyl in or on the raw
agricultural commodities barley, grain;
barley, hay; barley, straw; flax, seed;
milk, fat; sunflower, seed; wheat, forage;
wheat, grain; wheat, hay; and wheat,
straw. Nissan Chemical Industries, Ltd
requested this tolerance under the
Federal Food, Drug, and Cosmetic Act
(FFDCA), as amended by the Food
Quality Protection Act of 1996 (FQPA).
DATES: This regulation is effective
September 27, 2006. Objections and
requests for hearings must be received
on or before November 27, 2006, 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–2006–0204. All documents in the
docket are listed in the index for the
docket. 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
Building), 2777 S. Crystal Drive,
Arlington, VA. The Docket Facility is
open from 8:30 a.m. to 4 p.m., Monday
through Friday, excluding legal
holidays. The Docket telephone number
is (703) 305–5805.
FOR FURTHER INFORMATION CONTACT:
James A. Tompkins, Registration
Division (7505P), Office of Pesticide
Programs, Environmental Protection
Agency, 1200 Pennsylvania Ave., NW.,
Washington, DC 20460–0001; telephone
number: 703–305–5697; e-mail address:
Tompkins.jim@epa.gov.
SUPPLEMENTARY INFORMATION:
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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:
• Crop production (NAICS 111), e.g.,
agricultural workers; greenhouse,
nursery, and floriculture workers;
farmers.
• Animal production (NAICS 112),
e.g., cattle ranchers and farmers, dairy
cattle farmers, livestock farmers.
• Food manufacturing (NAICS 311),
e.g., agricultural workers; farmers;
greenhouse, nursery, and floriculture
workers; ranchers; pesticide applicators.
• Pesticide manufacturing (NAICS
32532), e.g., agricultural workers;
commercial applicators; farmers;
greenhouse, nursery, and floriculture
workers; residential users.
This listing is not intended to be
exhaustive, but rather provides 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 an electronic
copy of this Federal Register document
through the electronic docket at https://
www.regulations.gov, you may access
this Federal Register document
electronically through the EPA Internet
under the ‘‘Federal Register’’ listings at
https://www.epa.gov/fedrgstr. You may
also access a frequently updated
electronic version of 40 CFR part 180
through the Government Printing
Office’s pilot e-CFR site at https://
www.gpoaccess.gov/ecfr.
C. Can I File an Objection or Hearing
Request?
Under section 408(g) of the FFDCA, as
amended by the FQPA, any person may
file an objection to any aspect of this
regulation and may also request a
hearing on those objections. The EPA
procedural regulations which govern the
submission of objections and requests
for hearings appear in 40 CFR part 178.
You must file your objection or request
a hearing on this regulation in
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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–2006–0204 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
on or before November 27, 2006.
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 your
copies, identified by docket ID number
EPA–HQ–OPP–2006–0204, 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 Building), 2777 S.
Crystal Drive, Arlington, VA. Deliveries
are only accepted during the Docket’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 telephone number is (703) 305–
5805.
II. Background and Statutory Findings
In the Federal Register of August 2,
2006 (71 FR 43762) (FRL–8057–2), 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 0F6076) by Nissan
Chemical Industries, Ltd (Nissan), 7-1,3Chome, Kanda-Nishiki-Cho Chiyoda-Ku,
Tokyo, 101–0054, Japan. The petition
requested that 40 CFR 180. 441 be
amended by establishing a tolerance for
residues of the herbicide quizalofop-pethyl on barley, flax (seed) and wheat at
0.05 part per million (ppm) and
sunflower (seed) at 2.0 part per million.
That notice included a summary of the
petition prepared by Nissan Chemical
Industries, Ltd, the registrant. There
were no comments received in response
to the notice of filing.
During the course of the review, the
Agency determined that based on the
calculated maximum dietary burdens
(MTDBs) for quizalofop-p ethyl the
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current tolerance for milk, fat should be
increased. Therefore, the petition was
subsequently amended to propose that
40 CFR 180.441(a)(2) be amended by
proposing a tolerance be established for
the combined residues of the herbicide
quizalofop, (2-[4-(6-chloroquinoxalin-2yloxy)phenoxy]propanoic acid),
quizalop-ethyl (ethyl-2-[4-(6chloroquinoxalin-2yloxy)phenoxy]propanoate), and
quizalofop-methyl (methyl 2-[4-(6chloroquinoxalin-2yloxy)phenoxy]propanoate), all
expressed as quizalofop ethyl on milk,
fat at 0.25 ppm. This tolerance will
replace the current milk, fat tolerance
listing of 0.05 ppm. During the course
of the review the Agency also
determined that the available data
supported a reduction in the proposed
tolerance for sunflower, seed and that
the commodities for barley and wheat
needed to be defined based on current
terminology. The petition was also
amended propose that 40 CFR
180.441(a)(3) be amended by proposing
that tolerances be established for the
combined residues of the herbicide
quizalofop-p ethyl ester (ethyl (R)-2-(4((6-chloroquinoxalin-2yl)oxy)phenoxy)propanonate) and its
acid metabolite quizalofop-p [R-(2-(4((6-quinoxalin-2-yl)phenoxy)propanoic
acid] and the S enantiomers of both the
ester and the acid, all expressed as
quizalofop-p-ethyl ester, in or on the
raw agricultural commodities barley,
grain at 0.05 ppm; barley, hay at 0.05
ppm; barley, straw at 0.05 ppm; flax,
seed at 0.05 ppm; sunflower, seed at 1.9
ppm; wheat, forage at 0.05 ppm; wheat,
grain at 0.05 ppm; wheat, hay at 0.05
ppm; and wheat, straw at 0.05 ppm.
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
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aggregate exposure to the pesticide
chemical residue....’’
EPA performs a number of analyses to
determine the risks from aggregate
exposure to pesticide residues. For
further discussion of the regulatory
requirements of section 408 of the
FFDCA and a complete description of
the risk assessment process, see https://
www.epa.gov/fedrgstr/EPA-PEST/1997/
November/Day-26/p30948.htm.
III. Aggregate Risk Assessment and
Determination of Safety
Consistent with 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,
consistent with section 408(b)(2) of
FFDCA, for a tolerance for combined
residues of quizalofop, quizalofop-ethyl,
and quizalofop-methyl, all expressed as
quizalofop ethyl on milk, fat at 0.25
ppm, and for the combined residues of
quizalofop-p ethyl ester, quizalop-p, and
the S-enantiomers of both the ester and
the acid , all expressed as quizalofop
ethyl in or barley, grain at 0.05 ppm;
barley, hay at 0.05 ppm; barley, straw at
0.05 ppm; flax, seed at 0.05 ppm;
sunflower, seed at 1.9 ppm; wheat,
forage at 0.05 ppm; wheat, grain at 0.05
ppm; wheat, hay at 0.05 ppm; and
wheat, straw at 0.05 ppm. EPA’s
assessment of exposures and risks
associated with establishing the
tolerance 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. Specific
information on the studies received and
the nature of the toxic effects caused by
quizalofop ethyl as well as the noobserved-adverse-effect-level (NOAEL)
and the lowest-observed-adverse-effectlevel (LOAEL) from the toxicity studies
can be found in the Federal Register of
June 16, 1998 https://www.epa.gov/
fedrgstr/EPA-PEST/1998/June/Day-16/
p15746.htm.
B. Toxicological Endpoints
For hazards that have a threshold
below which there is no appreciable
risk, the dose at which no adverse
effects are observed (the NOAEL) from
the toxicology study identified as
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appropriate for use in risk assessment is
used to estimate the toxicological level
of concern(LOC). However, the lowest
dose at which adverse effects of concern
are identified (the LOAEL) is sometimes
used for risk assessment if no NOAEL
was achieved in the toxicology study
selected. An uncertainty factor (UF) is
applied to reflect 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.
The linear default risk methodology
(Q*) is the primary method currently
used by the Agency to quantify nonthreshold hazards such as cancer. The
Q* approach assumes that any amount
of exposure will lead to some degree of
cancer risk, estimates risk in terms of
the probability of occurrence of
additional cancer cases. More
information can be found on the general
principles EPA uses in risk
characterization at https://www.epa.gov/
pesticides/health/human/htm.
A summary of the toxicological
endpoints for quizalofop ethyl used for
human risk assessment is discussed in
Unit III.B. of the final rule published in
the Federal Register of June 16, 1998
https://www.epa.gov/fedrgstr/EPA-PEST/
1998/June/Day-16/p15746.htm.
C. Exposure Assessment
1. Dietary exposure from food and
feed uses. Tolerances have been
established (40 CFR 180.441) for the
combined residues of quizalofop,
quizalofop-p ethyl and associated
metabolites, all expressed as quizalofop
ethyl , in or on a variety of raw
agricultural commodities. Tolerances
have been established under 40 CFR
180.441(a)(2) for quizalofop, quizalofopethyl, and quizalofop-methyl, all
expressed as quizalofop ethyl in meat,
fat, and meat byproducts of cattle, goat,
hog, horse poultry, and sheep; milk and
milk, fat and egg. Risk assessments were
conducted by EPA to assess dietary
exposures from quizalofop ethyl 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 one-day or
single exposure.
No such effects were identified in the
toxicological studies for quizalofop
ethyl; therefore, a quantitative acute
dietary exposure assessment is
unnecessary
ii. Chronic exposure. In conducting
the chronic dietary exposure assessment
EPA used the Dietary Exposure
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Evaluation Model software with the
Food Commodity Intake Database
(DEEM-FCIDTM), which incorporates
food consumption data as reported by
respondents in the USDA 1994–1996
and 1998 Nationwide Continuing
Surveys of Food Intake by Individuals
(CSFII), and accumulated exposure to
the chemical for each commodity. The
following assumptions were made for
the chronic exposure assessments:
tolerance level residues for all
commodities and 100 percent crop
treated. The assessment included
existing food uses as well as the newly
proposed tolerances for uses on barley,
wheat, sunflower, and flax. PCT and/or
anticipated residues were not used.
iii. Cancer. EPA concluded that
quizalofop ethyl should be classified as
a Category D carcinogen (not classifiable
as to human carcinogenicity), based on
results of rat and mouse cancer studies
along with other relevant short-term
toxicity, mutagenicity studies, and
structure-activity relationships. The
Group D classification is based on an
approximate doubling in the incidence
of mice liver tumors between controls
and the high-dose. This finding was not
considered strong enough to warrant the
classification of a Category C (possible
human carcinogen); the increase was of
marginal statistical significance,
occurred at high dose which exceeded
the MTD, and occurred in a study in
which the concurrent control for liver
tumors was somewhat low as compared
to the historical controls, while the
high-dose control group was at the
upper end of the previous historical
control groups. Based on the results of
the above adequate studies, the Agency
believes that quizalofop-p ethyl does not
pose a significant cancer risk to humans
and a quantitative cancer exposure
assessment is unnecessary.
2. Dietary exposure from drinking
water. The Agency lacks sufficient
monitoring exposure data to complete a
comprehensive dietary exposure
analysis and risk assessment for
quizalofop ethyl in drinking water.
Because the Agency does not have
comprehensive monitoring data,
drinking water concentration estimates
are made by reliance on simulation or
modeling taking into account data on
the physical characteristics of
quizalofop ethyl. Further information
regarding EPA drinking water models
used in pesticide exposure assessment
can be found at https://www.epa.go/
oppefed/models/water/index.htm.
Based on the PRZM/EXAMS and SCIGROW models, the estimated
environmental concentrations (EECs) of
quizalofop ethyl for chronic exposures
are 1.99 parts per billion (ppb) for
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surface water and 0.15 ppb for ground
water.
Modeled estimates of drinking water
concentrations were directly entered
into the dietary exposure model (DEEMFCID). For chronic dietary risk
assessment, the annual average
concentration in surface water of 1.99
ppb was used to assess the contribution
to 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).
Quizalofop ethyl is not registered for
use on any sites that would result in
residential exposure.
4. Cumulative effects from substances
with a common mechanism of toxicity.
Section 408(b)(2)(D)(v) of the 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.’’
Unlike other pesticides for which EPA
has followed a cumulative risk approach
based on a common mechanism of
toxicity, EPA has not made a common
mechanism of toxicity finding as to
quizlalofop ethyl and any other
substances and quizalofop ethyl does
not appear to produce a toxic metabolite
produced by other substances. For the
purposes of this tolerance action,
therefore, EPA has not assumed that
quizalofop ethyl has 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 the policy statements released by
EPA’s Office of Pesticide Programs
concerning common mechanism
determinations and procedures for
cumulating effects from substances
found to have a common mechanism on
EPA’s website at https://www.epa.gov/
pesticides/cumulative.
D. Safety Factor for Infants and
Children
1. In general. Section 408 of FFDCA
provides that EPA shall apply an
additional tenfold 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 data base on
toxicity and exposure unless EPA
determines based on reliable data that a
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different margin of safety will be safe for
infants and children. Margins of safety
are incorporated into EPA risk
assessments either directly through use
of a MOE analysis or through using
uncertainty (safety) factors in
calculating a dose level that poses no
appreciable risk to humans. In applying
this provision, EPA either retains the
default value of 10X when reliable data
do not support the choice of a different
factor, or, if reliable data are available,
EPA uses a different additional safety
factor value based on the use of
traditional uncertainty factors and/or
special FQPA safety factors, as
appropriate.
2. Prenatal and postnatal sensitivity.
There are no concerns and no residual
uncertainties for increased qualitative or
quantitative susceptibility following in
utero or prenatal/postnatal exposure or
for prenatal and postnatal toxicity. See
the Federal Register of June 16, 1998
https://www.epa.gov/fedrgstr/EPA-PEST/
1998/June/Day-16/p15746.htm.
A developmental neurotoxicity study
is not required for quizalofop ethyl
based on the following:
i. Quizalofop ethyl does not appear to
be a neurotoxic chemical.
ii. No-treatment -related effects on
brain weight or histopathology of the
nervous system were observed in
studies that measured these endpoints.
iii. No evidence of developmental
anamalies of the fetal nervous system
were observed in either rats or rabbits,
at maternally toxic doses up to 300 and
600 mg/kg/day, respectively.
iv. No evidence of an effect on
functional development was observed in
a postnatal segment of the
developmental toxicity study in rats.
3. Conclusion. There is a complete
toxicity data base for quizalofop ethyl
and exposure data are complete or are
estimated based on data that reasonably
accounts for potential exposures. EPA
determined that the 10X SF to protect
infants and children should be removed.
The FQPA factor is removed because the
toxicology data base is complete; a
developmental neurotoxicity study is
not required; developmental toxicity
studies showed no increased sensitivity
in fetuses as compared to maternal
animals following in utero exposures in
rats and rabbits; a 2-generatioin
reproduction study showed no
increased sensitivity in pups as
compared to adults; and exposure data
are complete or are estimated based on
data that reasonably accounts for
potential exposures.
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E. Aggregate Risks and Determination of
Safety
1. Acute risk. Quizalofop-ethyl is not
expected to pose an acute risk because
no toxicological endpoints attributable
to a single exposure (dose) were
identified in the toxicology data base.
2. Chronic risk. Using the exposure
assumptions described in this unit for
chronic exposure, EPA has concluded
that exposure to quizalofop-ethyl from
food will utilize 11% of the cPAD for
the U.S. population, 27% of the cPAD
for infants <1 year old, and 29% of the
cPAD for children 1 to 2 years old..
There are no current or requested
residential uses for quizalofop-ethyl that
result in chronic residential exposure to
quizalofop-ethyl. Therefore, EPA does
not expect the aggregate exposures,
which are equivalent to chronic dietary
exposures, to exceed 100% of the cPAD.
3. Short-term risk. Short-term
aggregate exposure takes into account
residential exposure plus chronic
exposure to food and water (considered
to be a background exposure level).
Quizalofop ethyl is not registered for
use on any sites that would result in
residential exposure. Therefore, the
aggregate risk is the sum of the risk from
food and water, which do not exceed
the Agency’s level of concern.
4. Intermediate-term risk.
Intermediate-term aggregate exposure
takes into account residential exposure
plus chronic exposure to food and water
(considered to be a background
exposure level).
Quizalofop ethyl is not registered for
use on any sites that would result in
residential exposure. Therefore, the
aggregate risk is the sum of the risk from
food and water, which do not exceed
the Agency’s level of concern.
5. Aggregate cancer risk for U.S.
population. For the reasons stated in
this unit, quizalofop ethyl is not
expected to pose a greater than
negligible 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 and to infants and children
from aggregate exposure to quizalofop
ethyl residues.
IV. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology
(High Performance Liquid
Chromatography (HPLC) Methods,
SARS–98–06 (for flax and sunflower)
and Morse Method Meth-147 (for wheat
and barley)) are available to enforce the
tolerance expression. The method may
be requested from: Chief, Analytical
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56377
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
There is a Canadian maximum
residue limit (MRL) in/on flax at 0.05
mg/kg, which is in agreement with the
proposed tolerance on flax, seed. There
are no Mexican or Codex MRLs
established for quizalofop ethyl,
therefore compatibility is not a problem
at this time.
V. Conclusion
Therefore, the tolerance is established
under 40 CFR 180.441(a)(2) for the
combined residues of the herbicide
quizalofop (2-[4-(6-chloroquinoxalin-2yloxy)phenoxy]propanoic acid),
quizalop-ethyl (ethyl-2-[4-(6chloroquinoxalin-2yloxy)phenoxy]propanoate), and
quizalofop-methyl (methyl 2-[4-(6chloroquinoxalin-2yloxy)phenoxy]propanoate), all
expressed as quizalofop ethyl in or on
milk, fat at 0.25 ppm. This tolerance
will replace the current milk, fat
tolerance listing of 0.05 ppm.
Tolerances are also established under 40
CFR 180.441(a)(3) for the combined
residues of the herbicide quizalofop-p
ethyl ester (ethyl (R)-2-(4-((6chloroquinoxalin-2yl)oxy)phenoxypropanonate] and its
acid metabolite quizalofop-p [R-(2-(4((6-quinoxalin-2-yl)phenoxy)propanoic
acid] and the S enantiomers of both the
ester and the acid, all expressed as
quizalofop-p-ethyl ester, in or on the
raw agricultural commodities barley,
grain at 0.05 ppm; barley, hay at 0.05
ppm; barley, straw at 0.05 ppm; flax,
seed at 0.05 ppm; sunflower, seed at 1.9
ppm; wheat, forage at 0.05 ppm; wheat,
grain at 0.05 ppm; wheat, hay at 0.05
ppm; and wheat, straw at 0.05 ppm.
VI. Statutory and Executive Order
Reviews
This final rule establishes a tolerance
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 rule has
been exempted from review under
Executive Order 12866 due to its lack of
significance, this rule is not subject to
Executive Order 13211, Actions
Concerning Regulations That
Significantly Affect Energy Supply,
Distribution, or Use (66 FR 28355, May
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sroberts on PROD1PC70 with RULES
56378
Federal Register / Vol. 71, No. 187 / Wednesday, September 27, 2006 / Rules and Regulations
22, 2001). 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., or 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). 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); or OMB review or any Agency
action under Executive Order 13045,
entitled Protection of Children from
Environmental Health Risks and Safety
Risks (62 FR 19885, April 23, 1997).
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). 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. In addition, the
Agency has determined that this action
will not have a substantial direct effect
on States, on the relationship between
the national government and the States,
or on the distribution of power and
responsibilities among the various
levels of government, as specified in
Executive Order 13132, entitled
Federalism (64 FR 43255, August 10,
1999). Executive Order 13132 requires
EPA to develop an accountable process
to ensure ‘‘meaningful and timely input
by State and local officials in the
development of regulatory policies that
have federalism implications.’’ ‘‘Policies
that have federalism implications’’ is
defined in the Executive order to
include regulations that have
‘‘substantial direct effects on the States,
on the relationship between the national
government and the States, or on the
distribution of power and
responsibilities among the various
levels of government.’’ This final rule
directly regulates growers, food
processors, food handlers and food
retailers, not States. This action does not
alter the relationships or distribution of
power and responsibilities established
by Congress in the preemption
provisions of section 408(n)(4) of
FFDCA. For these same reasons, the
VerDate Aug<31>2005
16:20 Sep 26, 2006
Jkt 208001
Agency has determined that this rule
does not have any ‘‘tribal implications’’
as described in Executive Order 13175,
entitled Consultation and Coordination
with Indian Tribal Governments (65 FR
67249, November 6, 2000). Executive
Order 13175, requires EPA to develop
an accountable process to ensure
‘‘meaningful and timely input by tribal
officials in the development of
regulatory policies that have tribal
implications.’’ ‘‘Policies that have tribal
implications’’ is defined in the
Executive order to include regulations
that have ‘‘substantial direct effects on
one or more Indian tribes, on the
relationship between the Federal
Government and the Indian tribes, or on
the distribution of power and
responsibilities between the Federal
Government and Indian tribes.’’ This
rule will not have substantial direct
effects on tribal governments, on the
relationship between the Federal
Government and Indian tribes, or on the
distribution of power and
responsibilities between the Federal
Government and Indian tribes, as
specified in Executive Order 13175.
Thus, Executive Order 13175 does not
apply to this rule.
VII. Congressional Review Act
The Congressional Review Act, 5
U.S.C. 801 et seq., as added by the Small
Business Regulatory Enforcement
Fairness Act of 1996, generally provides
that before a rule may take effect, the
agency promulgating the rule must
submit a rule report, which includes a
copy of the rule, 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: September 19, 2006.
Lois Rossi,
Director, Registration Division, Office of
Pesticide Programs.
Therefore, 40 CFR chapter I is
amended as follows:
I
PART 180—[AMENDED]
1. The authority citation for part 180
continues to read as follows:
I
PO 00000
Frm 00044
Fmt 4700
Sfmt 4700
Authority: 21 U.S.C. 321(q), 346a and 371.
2. Section 180.441 is amended by
revising the listing for milk, fat in the
table to paragraph (a)(2) and by
amending the table in paragraph (a)(3)
by alphabetically adding commodities
to read as follows:
I
§ 180.441
residues.
Quizalofop ethyl; tolerances for
(a) * * *
(2) * * *
Commodity
Parts per million
*
*
*
Milk, fat ...........................
*
*
*
(3) *
*
*
*
0.25
Parts per million
Barley, grain ...................
Barley, hay ......................
Barley, straw ...................
*
*
*
Flax, seed .......................
Sunflower, seed ..............
*
*
*
Wheat, forage .................
Wheat, grain ...................
Wheat, hay .....................
Wheat, straw ...................
*
*
*
Commodity
*
*
*
*
0.05
0.05
0.05
*
*
0.05
1.9
*
*
0.05
0.05
0.05
0.05
*
[FR Doc. 06–8253 Filed 9–26–06; 8:45 am]
BILLING CODE 6560–50–S
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 180
[EPA–HQ–OPP–2006–0056; FRL–8093–5]
Bentazon, Carboxin, Dipropyl
Isocinchomeronate, Oil of Lemongrass
(Oil of Lemon) and Oil of Orange;
Tolerance Actions
Environmental Protection
Agency (EPA).
ACTION: Final rule.
AGENCY:
SUMMARY: EPA is revoking certain
tolerances for the fungicide carboxin,
the insecticide dipropyl
isocinchomeronate, and the fungicide/
animal repellent oil of lemon (oil of
lemongrass) and oil of orange. Also,
EPA is modifying certain tolerances for
the herbicide bentazon and the
fungicide carboxin. In addition, EPA is
establishing new tolerances for the
herbicide bentazon.
DATES: This regulation is effective
September 27, 2006. Objections and
requests for hearings must be received
on or before November 27, 2006, and
must be filed in accordance with the
E:\FR\FM\27SER1.SGM
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Agencies
[Federal Register Volume 71, Number 187 (Wednesday, September 27, 2006)]
[Rules and Regulations]
[Pages 56374-56378]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 06-8253]
-----------------------------------------------------------------------
ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 180
[EPA-HQ-OPP-2006-0204; FRL-8094-5]
Quizalofop ethyl; Pesticide Tolerance
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: This regulation establishes a tolerance for combined residues
of quizalofop ethyl in or on the raw agricultural commodities barley,
grain; barley, hay; barley, straw; flax, seed; milk, fat; sunflower,
seed; wheat, forage; wheat, grain; wheat, hay; and wheat, straw. Nissan
Chemical Industries, Ltd requested this tolerance under the Federal
Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality
Protection Act of 1996 (FQPA).
DATES: This regulation is effective September 27, 2006. Objections and
requests for hearings must be received on or before November 27, 2006,
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-2006-0204. All documents in the
docket are listed in the index for the docket. 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 Building), 2777 S. Crystal Drive,
Arlington, VA. The Docket Facility is open from 8:30 a.m. to 4 p.m.,
Monday through Friday, excluding legal holidays. The Docket telephone
number is (703) 305-5805.
FOR FURTHER INFORMATION CONTACT: James A. Tompkins, Registration
Division (7505P), Office of Pesticide Programs, Environmental
Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-
0001; telephone number: 703-305-5697; e-mail address:
Tompkins.jim@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:
Crop production (NAICS 111), e.g., agricultural workers;
greenhouse, nursery, and floriculture workers; farmers.
Animal production (NAICS 112), e.g., cattle ranchers and
farmers, dairy cattle farmers, livestock farmers.
Food manufacturing (NAICS 311), e.g., agricultural
workers; farmers; greenhouse, nursery, and floriculture workers;
ranchers; pesticide applicators.
Pesticide manufacturing (NAICS 32532), e.g., agricultural
workers; commercial applicators; farmers; greenhouse, nursery, and
floriculture workers; residential users.
This listing is not intended to be exhaustive, but rather provides
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 an electronic copy of this Federal
Register document through the electronic docket at https://
www.regulations.gov, you may access this Federal Register document
electronically through the EPA Internet under the ``Federal Register''
listings at https://www.epa.gov/fedrgstr. You may also access a
frequently updated electronic version of 40 CFR part 180 through the
Government Printing Office's pilot e-CFR site at https://
www.gpoaccess.gov/ecfr.
C. Can I File an Objection or Hearing Request?
Under section 408(g) of the FFDCA, as amended by the FQPA, any
person may file an objection to any aspect of this regulation and may
also request a hearing on those objections. The EPA procedural
regulations which govern the submission of objections and requests for
hearings appear in 40 CFR part 178. You must file your objection or
request a hearing on this regulation in
[[Page 56375]]
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-
2006-0204 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 on or before November 27, 2006.
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 your copies, identified by docket ID
number EPA-HQ-OPP-2006-0204, 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
Building), 2777 S. Crystal Drive, Arlington, VA. Deliveries are only
accepted during the Docket'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 telephone number is (703) 305-5805.
II. Background and Statutory Findings
In the Federal Register of August 2, 2006 (71 FR 43762) (FRL-8057-
2), 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
0F6076) by Nissan Chemical Industries, Ltd (Nissan), 7-1,3-Chome,
Kanda-Nishiki-Cho Chiyoda-Ku, Tokyo, 101-0054, Japan. The petition
requested that 40 CFR 180. 441 be amended by establishing a tolerance
for residues of the herbicide quizalofop-p-ethyl on barley, flax (seed)
and wheat at 0.05 part per million (ppm) and sunflower (seed) at 2.0
part per million. That notice included a summary of the petition
prepared by Nissan Chemical Industries, Ltd, the registrant. There were
no comments received in response to the notice of filing.
During the course of the review, the Agency determined that based
on the calculated maximum dietary burdens (MTDBs) for quizalofop-p
ethyl the current tolerance for milk, fat should be increased.
Therefore, the petition was subsequently amended to propose that 40 CFR
180.441(a)(2) be amended by proposing a tolerance be established for
the combined residues of the herbicide quizalofop, (2-[4-(6-
chloroquinoxalin-2-yloxy)phenoxy]propanoic acid), quizalop-ethyl
(ethyl-2-[4-(6-chloroquinoxalin-2-yloxy)phenoxy]propanoate), and
quizalofop-methyl (methyl 2-[4-(6-chloroquinoxalin-2-
yloxy)phenoxy]propanoate), all expressed as quizalofop ethyl on milk,
fat at 0.25 ppm. This tolerance will replace the current milk, fat
tolerance listing of 0.05 ppm. During the course of the review the
Agency also determined that the available data supported a reduction in
the proposed tolerance for sunflower, seed and that the commodities for
barley and wheat needed to be defined based on current terminology. The
petition was also amended propose that 40 CFR 180.441(a)(3) be amended
by proposing that tolerances be established for the combined residues
of the herbicide quizalofop-p ethyl ester (ethyl (R)-2-(4-((6-
chloroquinoxalin-2-yl)oxy)phenoxy)propanonate) and its acid metabolite
quizalofop-p [R-(2-(4-((6-quinoxalin-2-yl)phenoxy)propanoic acid] and
the S enantiomers of both the ester and the acid, all expressed as
quizalofop-p-ethyl ester, in or on the raw agricultural commodities
barley, grain at 0.05 ppm; barley, hay at 0.05 ppm; barley, straw at
0.05 ppm; flax, seed at 0.05 ppm; sunflower, seed at 1.9 ppm; wheat,
forage at 0.05 ppm; wheat, grain at 0.05 ppm; wheat, hay at 0.05 ppm;
and wheat, straw at 0.05 ppm.
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....''
EPA performs a number of analyses to determine the risks from
aggregate exposure to pesticide residues. For further discussion of the
regulatory requirements of section 408 of the FFDCA and a complete
description of the risk assessment process, see https://www.epa.gov/
fedrgstr/EPA-PEST/1997/November/Day-26/p30948.htm.
III. Aggregate Risk Assessment and Determination of Safety
Consistent with 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, consistent with section
408(b)(2) of FFDCA, for a tolerance for combined residues of
quizalofop, quizalofop-ethyl, and quizalofop-methyl, all expressed as
quizalofop ethyl on milk, fat at 0.25 ppm, and for the combined
residues of quizalofop-p ethyl ester, quizalop-p, and the S-enantiomers
of both the ester and the acid , all expressed as quizalofop ethyl in
or barley, grain at 0.05 ppm; barley, hay at 0.05 ppm; barley, straw at
0.05 ppm; flax, seed at 0.05 ppm; sunflower, seed at 1.9 ppm; wheat,
forage at 0.05 ppm; wheat, grain at 0.05 ppm; wheat, hay at 0.05 ppm;
and wheat, straw at 0.05 ppm. EPA's assessment of exposures and risks
associated with establishing the tolerance 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. Specific information on the studies received and the nature
of the toxic effects caused by quizalofop ethyl 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
Federal Register of June 16, 1998 https://www.epa.gov/fedrgstr/EPA-PEST/
1998/June/Day-16/p15746.htm.
B. Toxicological Endpoints
For hazards that have a threshold below which there is no
appreciable risk, the dose at which no adverse effects are observed
(the NOAEL) from the toxicology study identified as
[[Page 56376]]
appropriate for use in risk assessment is used to estimate the
toxicological level of concern(LOC). However, the lowest dose at which
adverse effects of concern are identified (the LOAEL) is sometimes used
for risk assessment if no NOAEL was achieved in the toxicology study
selected. An uncertainty factor (UF) is applied to reflect
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.
The linear default risk methodology (Q*) is the primary method
currently used by the Agency to quantify non-threshold hazards such as
cancer. The Q* approach assumes that any amount of exposure will lead
to some degree of cancer risk, estimates risk in terms of the
probability of occurrence of additional cancer cases. More information
can be found on the general principles EPA uses in risk
characterization at https://www.epa.gov/pesticides/health/human/htm.
A summary of the toxicological endpoints for quizalofop ethyl used
for human risk assessment is discussed in Unit III.B. of the final rule
published in the Federal Register of June 16, 1998 https://www.epa.gov/
fedrgstr/EPA-PEST/1998/June/Day-16/p15746.htm.
C. Exposure Assessment
1. Dietary exposure from food and feed uses. Tolerances have been
established (40 CFR 180.441) for the combined residues of quizalofop,
quizalofop-p ethyl and associated metabolites, all expressed as
quizalofop ethyl , in or on a variety of raw agricultural commodities.
Tolerances have been established under 40 CFR 180.441(a)(2) for
quizalofop, quizalofop-ethyl, and quizalofop-methyl, all expressed as
quizalofop ethyl in meat, fat, and meat byproducts of cattle, goat,
hog, horse poultry, and sheep; milk and milk, fat and egg. Risk
assessments were conducted by EPA to assess dietary exposures from
quizalofop ethyl 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 one-day or single exposure.
No such effects were identified in the toxicological studies for
quizalofop ethyl; therefore, a quantitative acute dietary exposure
assessment is unnecessary
ii. Chronic exposure. In conducting the chronic dietary exposure
assessment EPA used the Dietary Exposure Evaluation Model software with
the Food Commodity Intake Database (DEEM-FCIDTM), which incorporates
food consumption data as reported by respondents in the USDA 1994-1996
and 1998 Nationwide Continuing Surveys of Food Intake by Individuals
(CSFII), and accumulated exposure to the chemical for each commodity.
The following assumptions were made for the chronic exposure
assessments: tolerance level residues for all commodities and 100
percent crop treated. The assessment included existing food uses as
well as the newly proposed tolerances for uses on barley, wheat,
sunflower, and flax. PCT and/or anticipated residues were not used.
iii. Cancer. EPA concluded that quizalofop ethyl should be
classified as a Category D carcinogen (not classifiable as to human
carcinogenicity), based on results of rat and mouse cancer studies
along with other relevant short-term toxicity, mutagenicity studies,
and structure-activity relationships. The Group D classification is
based on an approximate doubling in the incidence of mice liver tumors
between controls and the high-dose. This finding was not considered
strong enough to warrant the classification of a Category C (possible
human carcinogen); the increase was of marginal statistical
significance, occurred at high dose which exceeded the MTD, and
occurred in a study in which the concurrent control for liver tumors
was somewhat low as compared to the historical controls, while the
high-dose control group was at the upper end of the previous historical
control groups. Based on the results of the above adequate studies, the
Agency believes that quizalofop-p ethyl does not pose a significant
cancer risk to humans and a quantitative cancer exposure assessment is
unnecessary.
2. Dietary exposure from drinking water. The Agency lacks
sufficient monitoring exposure data to complete a comprehensive dietary
exposure analysis and risk assessment for quizalofop ethyl in drinking
water. Because the Agency does not have comprehensive monitoring data,
drinking water concentration estimates are made by reliance on
simulation or modeling taking into account data on the physical
characteristics of quizalofop ethyl. Further information regarding EPA
drinking water models used in pesticide exposure assessment can be
found at https://www.epa.go/oppefed/models/water/index.htm.
Based on the PRZM/EXAMS and SCI-GROW models, the estimated
environmental concentrations (EECs) of quizalofop ethyl for chronic
exposures are 1.99 parts per billion (ppb) for surface water and 0.15
ppb for ground water.
Modeled estimates of drinking water concentrations were directly
entered into the dietary exposure model (DEEM-FCID). For chronic
dietary risk assessment, the annual average concentration in surface
water of 1.99 ppb was used to assess the contribution to 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).
Quizalofop ethyl is not registered for use on any sites that would
result in residential exposure.
4. Cumulative effects from substances with a common mechanism of
toxicity. Section 408(b)(2)(D)(v) of the 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.''
Unlike other pesticides for which EPA has followed a cumulative
risk approach based on a common mechanism of toxicity, EPA has not made
a common mechanism of toxicity finding as to quizlalofop ethyl and any
other substances and quizalofop ethyl does not appear to produce a
toxic metabolite produced by other substances. For the purposes of this
tolerance action, therefore, EPA has not assumed that quizalofop ethyl
has 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 the policy statements released by EPA's Office of
Pesticide Programs concerning common mechanism determinations and
procedures for cumulating effects from substances found to have a
common mechanism on EPA's website at https://www.epa.gov/pesticides/
cumulative.
D. Safety Factor for Infants and Children
1. In general. Section 408 of FFDCA provides that EPA shall apply
an additional tenfold 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 data base on toxicity and exposure
unless EPA determines based on reliable data that a
[[Page 56377]]
different margin of safety will be safe for infants and children.
Margins of safety are incorporated into EPA risk assessments either
directly through use of a MOE analysis or through using uncertainty
(safety) factors in calculating a dose level that poses no appreciable
risk to humans. In applying this provision, EPA either retains the
default value of 10X when reliable data do not support the choice of a
different factor, or, if reliable data are available, EPA uses a
different additional safety factor value based on the use of
traditional uncertainty factors and/or special FQPA safety factors, as
appropriate.
2. Prenatal and postnatal sensitivity. There are no concerns and no
residual uncertainties for increased qualitative or quantitative
susceptibility following in utero or prenatal/postnatal exposure or for
prenatal and postnatal toxicity. See the Federal Register of June 16,
1998 https://www.epa.gov/fedrgstr/EPA-PEST/1998/June/Day-16/p15746.htm.
A developmental neurotoxicity study is not required for quizalofop
ethyl based on the following:
i. Quizalofop ethyl does not appear to be a neurotoxic chemical.
ii. No-treatment -related effects on brain weight or histopathology
of the nervous system were observed in studies that measured these
endpoints.
iii. No evidence of developmental anamalies of the fetal nervous
system were observed in either rats or rabbits, at maternally toxic
doses up to 300 and 600 mg/kg/day, respectively.
iv. No evidence of an effect on functional development was observed
in a postnatal segment of the developmental toxicity study in rats.
3. Conclusion. There is a complete toxicity data base for
quizalofop ethyl and exposure data are complete or are estimated based
on data that reasonably accounts for potential exposures. EPA
determined that the 10X SF to protect infants and children should be
removed. The FQPA factor is removed because the toxicology data base is
complete; a developmental neurotoxicity study is not required;
developmental toxicity studies showed no increased sensitivity in
fetuses as compared to maternal animals following in utero exposures in
rats and rabbits; a 2-generatioin reproduction study showed no
increased sensitivity in pups as compared to adults; and exposure data
are complete or are estimated based on data that reasonably accounts
for potential exposures.
E. Aggregate Risks and Determination of Safety
1. Acute risk. Quizalofop-ethyl is not expected to pose an acute
risk because no toxicological endpoints attributable to a single
exposure (dose) were identified in the toxicology data base.
2. Chronic risk. Using the exposure assumptions described in this
unit for chronic exposure, EPA has concluded that exposure to
quizalofop-ethyl from food will utilize 11% of the cPAD for the U.S.
population, 27% of the cPAD for infants <1 year old, and 29% of the
cPAD for children 1 to 2 years old.. There are no current or requested
residential uses for quizalofop-ethyl that result in chronic
residential exposure to quizalofop-ethyl. Therefore, EPA does not
expect the aggregate exposures, which are equivalent to chronic dietary
exposures, to exceed 100% of the cPAD.
3. Short-term risk. Short-term aggregate exposure takes into
account residential exposure plus chronic exposure to food and water
(considered to be a background exposure level).
Quizalofop ethyl is not registered for use on any sites that would
result in residential exposure. Therefore, the aggregate risk is the
sum of the risk from food and water, which do not exceed the Agency's
level of concern.
4. Intermediate-term risk. Intermediate-term aggregate exposure
takes into account residential exposure plus chronic exposure to food
and water (considered to be a background exposure level).
Quizalofop ethyl is not registered for use on any sites that would
result in residential exposure. Therefore, the aggregate risk is the
sum of the risk from food and water, which do not exceed the Agency's
level of concern.
5. Aggregate cancer risk for U.S. population. For the reasons
stated in this unit, quizalofop ethyl is not expected to pose a greater
than negligible 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 and to infants and children from aggregate
exposure to quizalofop ethyl residues.
IV. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology (High Performance Liquid
Chromatography (HPLC) Methods, SARS-98-06 (for flax and sunflower) and
Morse Method Meth-147 (for wheat and barley)) are 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
There is a Canadian maximum residue limit (MRL) in/on flax at 0.05
mg/kg, which is in agreement with the proposed tolerance on flax, seed.
There are no Mexican or Codex MRLs established for quizalofop ethyl,
therefore compatibility is not a problem at this time.
V. Conclusion
Therefore, the tolerance is established under 40 CFR 180.441(a)(2)
for the combined residues of the herbicide quizalofop (2-[4-(6-
chloroquinoxalin-2-yloxy)phenoxy]propanoic acid), quizalop-ethyl
(ethyl-2-[4-(6-chloroquinoxalin-2-yloxy)phenoxy]propanoate), and
quizalofop-methyl (methyl 2-[4-(6-chloroquinoxalin-2-
yloxy)phenoxy]propanoate), all expressed as quizalofop ethyl in or on
milk, fat at 0.25 ppm. This tolerance will replace the current milk,
fat tolerance listing of 0.05 ppm. Tolerances are also established
under 40 CFR 180.441(a)(3) for the combined residues of the herbicide
quizalofop-p ethyl ester (ethyl (R)-2-(4-((6-chloroquinoxalin-2-
yl)oxy)phenoxypropanonate] and its acid metabolite quizalofop-p [R-(2-
(4-((6-quinoxalin-2-yl)phenoxy)propanoic acid] and the S enantiomers of
both the ester and the acid, all expressed as quizalofop-p-ethyl ester,
in or on the raw agricultural commodities barley, grain at 0.05 ppm;
barley, hay at 0.05 ppm; barley, straw at 0.05 ppm; flax, seed at 0.05
ppm; sunflower, seed at 1.9 ppm; wheat, forage at 0.05 ppm; wheat,
grain at 0.05 ppm; wheat, hay at 0.05 ppm; and wheat, straw at 0.05
ppm.
VI. Statutory and Executive Order Reviews
This final rule establishes a tolerance 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 rule has been
exempted from review under Executive Order 12866 due to its lack of
significance, this rule is not subject to Executive Order 13211,
Actions Concerning Regulations That Significantly Affect Energy Supply,
Distribution, or Use (66 FR 28355, May
[[Page 56378]]
22, 2001). 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., or 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). 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); or OMB review
or any Agency action under Executive Order 13045, entitled Protection
of Children from Environmental Health Risks and Safety Risks (62 FR
19885, April 23, 1997). 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). 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.
In addition, the Agency has determined that this action will not have a
substantial direct effect on States, on the relationship between the
national government and the States, or on the distribution of power and
responsibilities among the various levels of government, as specified
in Executive Order 13132, entitled Federalism (64 FR 43255, August 10,
1999). Executive Order 13132 requires EPA to develop an accountable
process to ensure ``meaningful and timely input by State and local
officials in the development of regulatory policies that have
federalism implications.'' ``Policies that have federalism
implications'' is defined in the Executive order to include regulations
that have ``substantial direct effects on the States, on the
relationship between the national government and the States, or on the
distribution of power and responsibilities among the various levels of
government.'' This final rule directly regulates growers, food
processors, food handlers and food retailers, not States. This action
does not alter the relationships or distribution of power and
responsibilities established by Congress in the preemption provisions
of section 408(n)(4) of FFDCA. For these same reasons, the Agency has
determined that this rule does not have any ``tribal implications'' as
described in Executive Order 13175, entitled Consultation and
Coordination with Indian Tribal Governments (65 FR 67249, November 6,
2000). Executive Order 13175, requires EPA to develop an accountable
process to ensure ``meaningful and timely input by tribal officials in
the development of regulatory policies that have tribal implications.''
``Policies that have tribal implications'' is defined in the Executive
order to include regulations that have ``substantial direct effects on
one or more Indian tribes, on the relationship between the Federal
Government and the Indian tribes, or on the distribution of power and
responsibilities between the Federal Government and Indian tribes.''
This rule will not have substantial direct effects on tribal
governments, on the relationship between the Federal Government and
Indian tribes, or on the distribution of power and responsibilities
between the Federal Government and Indian tribes, as specified in
Executive Order 13175. Thus, Executive Order 13175 does not apply to
this rule.
VII. Congressional Review Act
The Congressional Review Act, 5 U.S.C. 801 et seq., as added by the
Small Business Regulatory Enforcement Fairness Act of 1996, generally
provides that before a rule may take effect, the agency promulgating
the rule must submit a rule report, which includes a copy of the rule,
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: September 19, 2006.
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 180.441 is amended by revising the listing for milk, fat in
the table to paragraph (a)(2) and by amending the table in paragraph
(a)(3) by alphabetically adding commodities to read as follows:
Sec. 180.441 Quizalofop ethyl; tolerances for residues.
(a) * * *
(2) * * *
------------------------------------------------------------------------
Commodity Parts per million
------------------------------------------------------------------------
* * * * *
Milk, fat............................................ 0.25
* * * * *
------------------------------------------------------------------------
(3) * * *
------------------------------------------------------------------------
Commodity Parts per million
------------------------------------------------------------------------
Barley, grain........................................ 0.05
Barley, hay.......................................... 0.05
Barley, straw........................................ 0.05
* * * * *
Flax, seed........................................... 0.05
Sunflower, seed...................................... 1.9
* * * * *
Wheat, forage........................................ 0.05
Wheat, grain......................................... 0.05
Wheat, hay........................................... 0.05
Wheat, straw......................................... 0.05
------------------------------------------------------------------------
* * * * *
[FR Doc. 06-8253 Filed 9-26-06; 8:45 am]
BILLING CODE 6560-50-S