Flumioxazin; Pesticide Tolerances, 20461-20466 [2013-07980]
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Federal Register / Vol. 78, No. 66 / Friday, April 5, 2013 / Rules and Regulations
(ii) Enforcement date and time.
Friday, Saturday, and Sunday of the
third weekend in June; 10 a.m. to 7 p.m.
each day.
(70) Olde Ellison Bay Days Fireworks
Display, Ellison Bay, Wisconsin—(i)
Location. All waters of Lake Michigan,
in the vicinity of Ellison Bay Wisconsin,
within a 400 foot radius from the
fireworks launch site located on a barge
in position 45°15′36″ N, 087°05′03″ W
(NAD 83).
(ii) Enforcement date and time. The
fourth Saturday of June; 9 p.m. to 10
p.m.
(71) Town of Porter Fireworks Display,
Porter Indiana—(i) Location. All waters
of Lake Michigan within the arc of a
circle with a 1,000 foot radius from the
fireworks launch site located in position
41°39′56″ N, 087°03′57″ W (NAD 83).
(ii) Enforcement date and time. The
first Saturday of July; 8:45 p.m. to 9:30
p.m.
(72) City of Menasha 4th of July
Fireworks, Lake Winnebago, Menasha,
Wisconsin—(i) Location. All U.S.
navigable waters of Lake Michigan and
the Fox River within the arc of a circle
with an 800 foot radius from the
fireworks launch site at position
41°39′56″ N, 087°03′57″ W (NAD 83).
(ii) Enforcement date and time. July 4;
9 p.m. to 10:30 p.m.
(73) ISAF Nations Cup Grand Final
Fireworks Display, Sheboygan,
Wisconsin—(i) Location. All waters of
Lake Michigan and Sheboygan Harbor,
in the vicinity of the south pier in
Sheboygan Wisconsin, within a 500 foot
radius from the fireworks launch site
located on land in position 43°44′55″ N,
087°41′51″ W (NAD 83).
(ii) Enforcement date and time.
September 13; 7:45 p.m. to 8:45 p.m.
(74) Magnificent Mile Fireworks
Display, Chicago, Illinois—(i) Location.
All waters and adjacent shoreline of the
Chicago River bounded by the arc of the
circle with a 210 foot radius from the
fireworks launch site with its center in
approximate position of 41°53′21″ N,
087°37′24″ W (NAD 83).
(ii) Enforcement date and time. The
third weekend in November; sunset to
termination of display.
(75) Lubbers Cup Regatta; Spring
Lake, MI—(i) Location. All waters of
Spring Lake in Spring Lake, Michigan
within a rectangle that is approximately
6,300 by 300 feet. The rectangle will be
bounded by the points beginning at
43°04′55″ N, 086°12′32″ W; then east to
43°04′57″ N, 086°11′6″ W; then south to
43°04′54″ N, 086°11′5″ W; then west to
43°04′52″ N, 086°12′32″ W; then north
back to the point of origin [NAD 83].
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(ii) Enforcement date and time. April
12 from 3:00 p.m. until 7:00 p.m., and
April 13 from 8:00 a.m. until 3:00 p.m.
(76) Chicago Match Cup Race;
Chicago, IL—(i) Location. All waters of
Chicago Harbor in the vicinity of Navy
Pier and the Chicago Harbor break wall
bounded by coordinates beginning at
41°53′37″ N, 087°35′26″ W; then south
to 41°53′24″ N, 087°35′26″ W; then west
to 41°53′24″ N, 087°35′55″ W; then
north to 41°53′37″ N, 087°35′55″ W;
then back to point of origin [NAD 83].
(ii) Enforcement date and time. This
event has historically occurred during
the month of August. The Captain of the
Port, Sector Lake Michigan, will
establish enforcement dates that will be
announced with a Notice of
Enforcement and marine information
broadcasts.
(77) Chicago to Mackinac Race;
Chicago, IL—(i) Location. All waters of
Lake Michigan in the vicinity of the
Navy Pier at Chicago IL, within a
rectangle that is approximately 1500 by
900 yards. The rectangle is bounded by
the coordinates beginning at 41°53′15.1″
N, 087°35′25.8″ W; then south to
41°52′48.7″ N, 087°35′25.8″ W; then east
to 41°52′49.0″ N, 087°34′26.0″ W; then
north to 41°53′15″ N, 087°34′26″ W;
then west, back to point of origin [NAD
83].
(ii) Enforcement date and time. This
event has historically occurred in the
month of July. The Captain of the Port,
Sector Lake Michigan, will establish
enforcement dates that will be
announced with a Notice of
Enforcement and marine information
broadcasts.
(b) Definitions. The following
definitions apply to this section:
(1) Designated representative means
any Coast Guard commissioned,
warrant, or petty officer designated by
the Captain of the Port, Sector Lake
Michigan, to monitor a safety zone,
permit entry into a zone, give legally
enforceable orders to persons or vessels
within a safety zone, and take other
actions authorized by the Captain of the
Port, Sector Lake Michigan.
(2) Public vessel means a vessel that
is owned, chartered, or operated by the
United States, or by a State or political
subdivision thereof.
(c) Regulations. (1) The general
regulations in 33 CFR 165.23 apply.
(2) All persons and vessels must
comply with the instructions of the
Captain of the Port, Sector Lake
Michigan, or his or her designated
representative. Upon being hailed by the
U.S. Coast Guard by siren, radio,
flashing light or other means, the
operator of a vessel shall proceed as
directed.
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(3) All vessels must obtain permission
from the Captain of the Port, Sector Lake
Michigan, or his or her designated
representative to enter, move within or
exit a safety zone established in this
section when the safety zone is
enforced. Vessels and persons granted
permission to enter one of the safety
zones listed in this section shall obey all
lawful orders or directions of the
Captain of the Port, Sector Lake
Michigan, or his or her designated
representative. While within a safety
zone, all vessels shall operate at the
minimum speed necessary to maintain a
safe course.
(d) Suspension of enforcement. If the
Captain of the Port, Sector Lake
Michigan, suspends enforcement of any
of these zones earlier than listed in this
section, the Captain of the Port, Sector
Lake Michigan, or his or her designated
representative will notify the public by
suspending the respective Broadcast
Notice to Mariners.
(e) Exemption. Public vessels, as
defined in paragraph (b) of this section,
are exempt from the requirements in
this section.
(f) Waiver. For any vessel, the Captain
of the Port, Sector Lake Michigan, or his
or her designated representative may
waive any of the requirements of this
section, upon finding that operational
conditions or other circumstances are
such that application of this section is
unnecessary or impractical for the
purposes of safety or environmental
safety.
Dated: March 22, 2013.
M.W. Sibley,
Captain, U.S. Coast Guard, Captain of the
Port, Sector Lake Michigan.
[FR Doc. 2013–07911 Filed 4–4–13; 8:45 am]
BILLING CODE 9110–04–P
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 180
[EPA–HQ–OPP–2012–0139; FRL–9381–7]
Flumioxazin; Pesticide Tolerances
Environmental Protection
Agency (EPA).
ACTION: Final rule.
AGENCY:
This regulation establishes
tolerances for residues of flumioxazin in
or on multiple commodities which are
identified and discussed later in this
document. Interregional Research
Project Number 4 (IR–4) requested these
tolerances under the Federal Food,
Drug, and Cosmetic Act (FFDCA).
SUMMARY:
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Federal Register / Vol. 78, No. 66 / Friday, April 5, 2013 / Rules and Regulations
This regulation is effective April
5, 2013. Objections and requests for
hearings must be received on or before
June 4, 2013, and must be filed in
accordance with the instructions
provided in 40 CFR part 178 (see also
Unit I.C. of the SUPPLEMENTARY
INFORMATION).
ADDRESSES: The docket for this action,
identified by docket identification (ID)
number EPA–HQ–OPP–2012–0139, is
available at https://www.regulations.gov
or at the Office of Pesticide Programs
Regulatory Public Docket (OPP Docket)
in the Environmental Protection Agency
Docket Center (EPA/DC), EPA West
Bldg., Rm. 3334, 1301 Constitution Ave.
NW., Washington, DC 20460–0001. The
Public Reading Room is open from 8:30
a.m. to 4:30 p.m., Monday through
Friday, excluding legal holidays. The
telephone number for the Public
Reading Room is (202) 566–1744, and
the telephone number for the OPP
Docket is (703) 305–5805. Please review
the visitor instructions and additional
information about the docket available
at https://www.epa.gov/dockets.
FOR FURTHER INFORMATION CONTACT:
Andrew Ertman, Registration Division
(7505P), Office of Pesticide Programs,
Environmental Protection Agency, 1200
Pennsylvania Ave. NW., Washington,
DC 20460–0001; telephone number:
(703) 308–9367; email address:
ertman.andrew@epa.gov.
SUPPLEMENTARY INFORMATION:
DATES:
I. General Information
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A. Does this action apply to me?
You may be potentially affected by
this action if you are an agricultural
producer, food manufacturer, or
pesticide manufacturer. The following
list of North American Industrial
Classification System (NAICS) codes is
not intended to be exhaustive, but rather
provides a guide to help readers
determine whether this document
applies to them. Potentially affected
entities may include:
• Crop production (NAICS code 111).
• Animal production (NAICS code
112).
• Food manufacturing (NAICS code
311).
• Pesticide manufacturing (NAICS
code 32532).
B. How can I get electronic access to
other related information?
You may access a frequently updated
electronic version of EPA’s tolerance
regulations at 40 CFR part 180 through
the Government Printing Office’s e-CFR
site at https://ecfr.gpoaccess.gov/cgi/t/
text/text-idx?&c=ecfr&tpl=/ecfrbrowse/
Title40/40tab_02.tpl.
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C. How can I file an objection or hearing
request?
Under FFDCA section 408(g), 21
U.S.C. 346a, any person may file an
objection to any aspect of this regulation
and may also request a hearing on those
objections. You must file your objection
or request a hearing on this regulation
in accordance with the instructions
provided in 40 CFR part 178. To ensure
proper receipt by EPA, you must
identify docket ID number EPA–HQ–
OPP–2012–0139 in the subject line on
the first page of your submission. All
objections and requests for a hearing
must be in writing, and must be
received by the Hearing Clerk on or
before June 4, 2013. Addresses for mail
and hand delivery of objections and
hearing requests are provided in 40 CFR
178.25(b).
In addition to filing an objection or
hearing request with the Hearing Clerk
as described in 40 CFR part 178, please
submit a copy of the filing (excluding
any Confidential Business Information
(CBI)) for inclusion in the public docket.
Information not marked confidential
pursuant to 40 CFR part 2 may be
disclosed publicly by EPA without prior
notice. Submit the non-CBI copy of your
objection or hearing request, identified
by docket ID number EPA–HQ–OPP–
2012–0139, by one of the following
methods:
• Federal eRulemaking Portal: https://
www.regulations.gov. Follow the online
instructions for submitting comments.
Do not submit electronically any
information you consider to be CBI or
other information whose disclosure is
restricted by statute.
• Mail: OPP Docket, Environmental
Protection Agency Docket Center (EPA/
DC), (28221T), 1200 Pennsylvania Ave.
NW., Washington, DC 20460–0001.
• Hand Delivery: To make special
arrangements for hand delivery or
delivery of boxed information, please
follow the instructions at https://
www.epa.gov/dockets/contacts.htm.
Additional instructions on
commenting or visiting the docket,
along with more information about
dockets generally, is available at https://
www.epa.gov/dockets.
II. Summary of Petitioned-For
Tolerance
In the Federal Register of May 2, 2012
(77 FR 25954) (FRL–9346–1), EPA
issued a document pursuant to FFDCA
section 408(d)(3), 21 U.S.C. 346a(d)(3),
announcing the filing of a pesticide
petition (PP 2E7982) by IR–4, 500
College Road East, Suite 201 W,
Princeton, NJ 08540. The petition
requested that 40 CFR 180.568 be
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amended by establishing tolerances for
residues of the herbicide flumioxazin, 2[7-fluoro-3,4-dihydro-3-oxo-4-(2propynyl)-2H-1,4-benzoxazin-6-yl]4,5,6,7-tetrahydro-1H-isoindole-1,3(2H)dione, in or on artichoke at 0.02 parts
per million (ppm); cabbage and Chinese
cabbage (tight-headed varieties only) at
0.02 ppm; olives, and olive oil at 0.02
ppm; pomegranate at 0.02 ppm; cactus
fruit at 0.1 ppm, and cactus pads at 0.05
ppm. That document referenced a
summary of the petition prepared by
Valent U.S.A. Corporation, the
registrant, which is available in the
docket, https://www.regulations.gov.
There were no comments received in
response to the notice of filing.
Based upon review of the data
supporting the petition, EPA has
modified the levels at which tolerances
are being established for some
commodities. The reason for these
changes is explained in Unit IV.C.
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 FFDCA section
408(b)(2)(D), and the factors specified in
FFDCA section 408(b)(2)(D), EPA has
reviewed the available scientific data
and other relevant information in
support of this action. EPA has
sufficient data to assess the hazards of
and to make a determination on
aggregate exposure for flumioxazin
including exposure resulting from the
tolerances established by this action.
EPA’s assessment of exposures and risks
associated with flumioxazin follows.
A. Toxicological Profile
EPA has evaluated the available
toxicity data and considered its validity,
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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.
In general, flumioxazin has mild or
low acute toxicity. Also, the subchronic
and chronic toxicity studies
demonstrated that toxic effects
associated with flumioxazin include
anemia as well as effects on the liver
and the cardiovascular system.
Developmental effects were observed in
developmental rat studies but not in
developmental rabbit studies.
Hematologic (hematopoietic) effects of
anemia were noted in rats, consisting of
alterations in hemoglobin parameters.
Increased renal toxicity in male rats was
also reported following chronic
exposure. There is no evidence of
neurotoxicity or immunotoxicity in the
recently submitted guideline studies.
Increased quantitative susceptibility
was seen in the rat developmental
toxicity studies. Fetal effects were
observed in the absence of maternal
toxicity. In addition, both increased
qualitative and quantitative
susceptibility were observed in the rat
reproduction study. Severe fetal effects
were observed at lower doses than
milder parental effects. In most of the
available mutagenicity studies,
flumioxazin was negative for
mutagenicity; however, aberrations were
seen in a chromosomal aberration assay
(CHO cells). Based on the lack of
evidence of carcinogenicity in mice and
rats, flumioxazin is classified as ‘‘not
likely to be carcinogenic to humans.’’
Specific information on the studies
received and the nature of the adverse
effects caused by flumioxazin 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 docket ID
number EPA–HQ–OPP–2012–0139 on
pages 43–48 of the document titled
‘‘Flumioxazin. Human Health Risk
Assessment for the Proposed Uses on
Artichoke, Cabbage, Olive, Pomegranate,
and Prickly Pear Cactus’’.
B. Toxicological Points of Departure/
Levels of Concern
Once a pesticide’s toxicological
profile is determined, EPA identifies
toxicological points of departure (POD)
and levels of concern to use in
evaluating the risk posed by human
exposure to the pesticide. For hazards
that have a threshold below which there
is no appreciable risk, the toxicological
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POD is used as the basis for derivation
of reference values for risk assessment.
PODs are developed based on a careful
analysis of the doses in each
toxicological study to determine the
dose at which no adverse effects are
observed (the NOAEL) and the lowest
dose at which adverse effects of concern
are identified (the LOAEL). Uncertainty/
safety factors are used in conjunction
with the POD to calculate a safe
exposure level—generally referred to as
a population-adjusted dose (PAD) or a
reference dose (RfD)—and a safe margin
of exposure (MOE). For non-threshold
risks, the Agency assumes that any
amount of exposure will lead to some
degree of risk. Thus, the Agency
estimates risk in terms of the probability
of an occurrence of the adverse effect
expected in a lifetime. For more
information on the general principles
EPA uses in risk characterization and a
complete description of the risk
assessment process, see https://
www.epa.gov/pesticides/factsheets/
riskassess.htm.
A summary of the toxicological
endpoints for flumioxazin used for
human risk assessment is discussed in
Unit III.B. of the final rule published in
the Federal Register of September 21,
2012 (77 FR 58493) (FRL–9358–3).
C. Exposure Assessment
1. Dietary exposure from food and
feed uses. In evaluating dietary
exposure to flumioxazin, EPA
considered exposure under the
petitioned-for tolerances as well as all
existing flumioxazin tolerances in 40
CFR 180.568. EPA assessed dietary
exposures from flumioxazin 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.
Such effects were identified for
flumioxazin. In estimating acute dietary
exposure, EPA used food consumption
information from the U.S. Department of
Agriculture’s National Health and
Nutrition Examination Survey, What We
Eat in America, (NHANES/WWEIA)
from 2003–2008. As to residue levels in
food, EPA assumed tolerance level
residues and 100 percent crop treated
(PCT) for all proposed and registered
commodities. In addition, EPA used
default concentration factors to estimate
residues of flumioxazin in processed
commodities.
ii. Chronic exposure. In conducting
the chronic dietary exposure assessment
EPA used the food consumption data
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from the USDA NHANES/WWEIA from
2003–2008. As to residue levels in food,
EPA assumed tolerance level residues
and 100 PCT for all proposed and
registered commodities. In addition,
EPA used default concentration factors
to estimate residues of flumioxazin in
processed commodities.
iii. Cancer. Based on the data
summarized in Unit III.A., EPA has
concluded that flumioxazin does not
pose a cancer risk to humans. Therefore,
a dietary exposure assessment for the
purpose of assessing cancer risk is
unnecessary.
iv. Anticipated residue and PCT
information. EPA did not use
anticipated residue and/or PCT
information in the dietary assessment
for flumioxazin. Tolerance level
residues and 100 PCT were assumed for
all food commodities.
2. Dietary exposure from drinking
water. In the environment flumioxazin
photodegrades very rapidly in water and
on soil. Concentrations of flumioxazin
and its major degradates (482–HA, APF,
and THPA) are expected to be found in
water; however, flumioxazin and the
metabolites 482–HA and APF have been
identified as the residues of concern in
drinking water.
To estimate concentrations of
flumioxazin including its major
degradates of concern (482–HA and
APF) in ground water, the Agency used
a screening level water exposure model
in the dietary exposure analysis and risk
assessment. This simulation model took
into account data on the physical,
chemical, and fate/transport
characteristics of flumioxazin. Since
this chemical is currently registered for
direct applications to water, surface
water estimates are based on the use of
flumioxazin as an aquatic herbicide
where a maximum 400 parts per billion
(ppb) concentration is maintained.
Hydrolysis is considered the major route
of dissipation for flumioxazin in the
environment and the levels of
degradates (482–HA and APF) increase
continuously with time.
Based on the Screening Concentration
in Ground Water (SCI–GROW) model
the estimated drinking water
concentrations (EDWCs) for both acute
and chronic exposures of 482–HA and
APF are estimated to be 45.27 ppb and
2.66 ppb, respectively, in ground water.
EDWCs of parent flumioxazin are
estimated to be negligible in ground
water for both acute and chronic
exposures. For surface water, the
EDWCs for flumioxazin are estimated to
be 400 ppb for acute exposures and no
482–HA and APF is expected to be
present. For chronic exposures, EDWCs
of flumioxazin and its major degradates
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(482–HA and APF) are estimated to be
9.4, 21.6, and 110.1 ppb, respectively,
for surface water resulting in an EDWC
of 142 ppb (total).
Modeled estimates of drinking water
concentrations were directly entered
into the dietary exposure model. For
acute dietary risk assessment, the water
concentration value of 400 ppb was
used to assess the contribution to
drinking water of flumioxazin. For
chronic dietary risk assessment, the
water concentration of value 142 ppb
(the total EDWC for flumioxazin, 482–
HA and APF in surface water) was used
to assess the contribution to drinking
water of flumioxazin and its major
degradates (482–HA and APF).
Further information regarding EPA
drinking water models used in pesticide
exposure assessment can be found at
https://www.epa.gov/oppefed1/models/
water/index.htm.
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).
Flumioxazin is currently registered
for uses that could result in residential
exposures, including aquatic areas,
ornamental gardens, ornamental trees,
turf, and golf courses. EPA assessed
residential exposure with the
assumption that homeowner handlers
wear shorts, short-sleeved shirts, socks,
and shoes, and that they complete all
tasks associated with the use of a
pesticide product including mixing/
loading, if needed, as well as the
application. Residential handler
exposure scenarios for both dermal and
inhalation are considered to be shortterm only, due to the infrequent use
patterns associated with homeowner
products.
EPA uses the term ‘‘postapplication’’
to describe exposure to individuals that
occur as a result of being in an
environment that has been previously
treated with a pesticide. Flumioxazin is
registered for use in many areas that can
be frequented by the general population
including residential areas, golf courses,
lakes, and ponds. As a result,
individuals can be exposed by entering
these areas if they have been previously
treated. Therefore, short-term and
intermediate dermal postapplication
exposures and risks were assessed for
adults and children. In addition, oral
post-application exposures and risks
were assessed for children to be
protective of possible hand-to-mouth,
object-to-mouth, and soil ingestion
activities that may occur on treated turf
areas. Further information regarding
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EPA standard assumptions and generic
inputs for residential exposures may be
found at https://www.epa.gov/pesticides/
trac/science/trac6a05.pdf.
4. Cumulative effects from substances
with a common mechanism of toxicity.
Section 408(b)(2)(D)(v) of FFDCA
requires that, when considering whether
to establish, modify, or revoke a
tolerance, the Agency consider
‘‘available information’’ concerning the
cumulative effects of a particular
pesticide’s residues and ‘‘other
substances that have a common
mechanism of toxicity.’’
EPA has not found flumioxazin to
share a common mechanism of toxicity
with any other substances, and
flumioxazin does not appear to produce
a toxic metabolite produced by other
substances. For the purposes of this
tolerance action, therefore, EPA has
assumed that flumioxazin does not have
a common mechanism of toxicity with
other substances. For information
regarding EPA’s efforts to determine
which chemicals have a common
mechanism of toxicity and to evaluate
the cumulative effects of such
chemicals, see EPA’s Web site at https://
www.epa.gov/pesticides/cumulative.
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 Safety Factor (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.
Evidence of increased susceptibility to
fetuses was observed in the oral and
dermal developmental rat studies i.e.
cardiovascular anomalies (ventricular
septal defect) that occurred in the
absence of maternal toxicity.
Additionally, the rat reproduction study
demonstrated evidence of qualitative
and quantitative post-natal
susceptibility because reproductive
effects in offspring were observed at
doses lower than those that caused
parental/systemic toxicity, and because
the reproductive effects in offspring
were considered to be more severe than
the parental/systemic effects.
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3. Conclusion. EPA has determined
that reliable data show the safety of
infants and children would be
adequately protected if the FQPA SF
were reduced to 1X for oral and dermal
exposures, but be retained at 10X for
inhalation exposures. That decision is
based on the following findings:
i. The toxicity database for
flumioxazin is largely complete with the
exception of an inhalation
developmental study, which was
recently determined necessary, in order
to better assess route-specific inhalation
risks. In the absence of this study, a 10X
FQPA safety factor to account for
database uncertainty is needed to
protect the safety of infants and children
to assess risks for all inhalation
exposure scenarios. The toxicity profile
can be characterized for all effects,
including potential developmental and
reproductive toxicity, immunotoxicity
and neurotoxicity with the current
database.
ii. There is no indication that
flumioxazin is a neurotoxic chemical
and there is no need for a
developmental neurotoxicity study or
additional UFs to account for
neurotoxicity.
iii. Although increased susceptibility
was seen in the rat developmental and
reproductive studies, EPA’s concern for
these effects is low, and there are no
residual uncertainties for pre- and/or
postnatal toxicity because:
a. The developmental toxicity
NOAELs/LOAELs are well characterized
after oral and dermal exposure;
b. The offspring toxicity NOAEL and
LOAEL are well characterized in the
reproduction study and
c. The points of departure for
assessing risk to developing fetuses,
infants, and children have been selected
either from the developmental and
reproductive toxicity studies from the
chronic study which established a lower
point of departure for chronic effects
than the studies in pre- and postnatal
animals. Thus, the regulatory endpoints
for flumioxazin are protective of the
increased susceptibility seen in the
developmental and reproduction
studies, and there are no residual
concerns for these effects.
iv. There are no residual uncertainties
identified in the exposure databases.
The acute and chronic dietary analyses
were based on tolerance-level residues
and 100 PCT assumptions for all
commodities. The dietary drinking
water assessment utilized water
concentration values generated by
model and associated modeling
parameters which are designed to
provide conservative, health protective,
high-end estimates of water
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concentrations. The residential
exposure assessment incorporates
similarly conservative assumptions in
the assessment of post-application
exposure to children and in the
incidental oral exposure assessment for
children.
E. Aggregate Risks and Determination of
Safety
EPA determines whether acute and
chronic dietary pesticide exposures are
safe by comparing aggregate exposure
estimates to the acute PAD (aPAD) and
chronic PAD (cPAD). For linear cancer
risks, EPA calculates the lifetime
probability of acquiring cancer given the
estimated aggregate exposure. Short-,
intermediate-, and chronic-term risks
are evaluated by comparing the
estimated aggregate food, water, and
residential exposure to the appropriate
PODs to ensure that an adequate MOE
exists.
1. Acute risk. Using the exposure
assumptions discussed in this unit for
acute exposure, the acute dietary
exposure from food and water to
flumioxazin will occupy 75% of the
aPAD for females 13–49 years old, the
only population group of concern for
acute risk.
2. Chronic risk. Using the exposure
assumptions described in this unit for
chronic exposure, EPA has concluded
that chronic exposure to flumioxazin
from food and water will utilize 44% of
the cPAD for all infants less than 1 year
old, the population subgroup receiving
the greatest exposure. Based on the
explanation in Unit III.C.3., regarding
residential use patterns, chronic
residential exposure to residues of
flumioxazin is not expected.
3. Short-term risk. Short-term
aggregate exposure takes into account
short-term residential exposure plus
chronic exposure to food and water
(considered to be a background
exposure level). Flumioxazin is
currently registered for uses that could
result in short-term residential
exposure, and the Agency has
determined that it is appropriate to
aggregate chronic exposure through food
and water with short-term residential
exposures to flumioxazin.
Different methodologies were used for
the presentation of short-term aggregate
risk for adults and children. An
aggregate risk estimate (ARI) approach
was required to estimate short-term
adult aggregate risk because there are
different levels of concern (LOCs) for
adult dermal and inhalation exposures,
100 and 1,000, respectively. For shortterm child aggregate risk, the combined
MOE approach was used because the
endpoint of concern (decreased pup
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weight) and the LOC are the same.
Using the exposure assumptions
described in this unit for short-term
exposures, EPA has concluded the
combined short-term food, water, and
residential exposures result in aggregate
ARI of 1.12 for adults and aggregate
MOE of 182 for children. Because EPA’s
level of concern for flumioxazin is an
ARI of 1 or below and a MOE of 100 or
below, these aggregate risk estimates are
not of concern.
4. Intermediate-term risk.
Intermediate-term aggregate exposure
takes into account intermediate-term
residential exposure plus chronic
exposure to food and water (considered
to be a background exposure level).
Since the short- and intermediate-term
toxicological endpoints for flumioxazin
are the same for each route of exposure,
only short-term exposures were
assessed.
5. Aggregate cancer risk for U.S.
population. Based on the lack of
evidence of carcinogenicity in two
adequate rodent carcinogenicity studies,
flumioxazin is not expected to pose a
cancer risk to humans.
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 flumioxazin
residues.
IV. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology
(gas chromatography/nitrogenphosphorus detection (GC/NPD)
method, Valent Method RM30–A–1) is
available to enforce the tolerance
expression. The method may be
requested from: Chief, Analytical
Chemistry Branch, Environmental
Science Center, 701 Mapes Rd., Ft.
Meade, MD 20755–5350; telephone
number: (410) 305–2905; email address:
residuemethods@epa.gov.
B. International Residue Limits
In making its tolerance decisions, EPA
seeks to harmonize U.S. tolerances with
international standards whenever
possible, consistent with U.S. food
safety standards and agricultural
practices. EPA considers the
international maximum residue limits
(MRLs) established by the Codex
Alimentarius Commission (Codex), as
required by FFDCA section 408(b)(4).
The Codex Alimentarius is a joint
United Nations Food and Agriculture
Organization/World Health
Organization food standards program,
and it is recognized as an international
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20465
food safety standards-setting
organization in trade agreements to
which the United States is a party. EPA
may establish a tolerance that is
different from a Codex MRL; however,
FFDCA section 408(b)(4) requires that
EPA explain the reasons for departing
from the Codex level.
The Codex has not established MRLs
for flumioxazin for any of the
commodities covered by this document.
C. Revisions to Petitioned-For
Tolerances
The Agency has revised the levels for
prickly pear cactus fruit and pads from
0.1 and 0.05 to 0.07 and 0.06,
respectively. The modifications were
due to the Agency’s use of the
Organization for Economic Co-operation
and Development (OECD) calculation
procedures to determine the appropriate
tolerance levels.
Additionally, the petition proposed a
tolerance for olive oil at 0.02 ppm. The
Agency reviewed an olive oil processing
study and found that the residue levels
found in olive oil were the same as
those found in olives. As such, the
Agency has determined that a tolerance
for olive is appropriate, and a separate
tolerance on olive oil is not necessary.
V. Conclusion
Therefore, tolerances are established
for residues of flumioxazin, 2-[7-fluoro3,4-dihydro-3-oxo-4-(2-propynyl)-2H1,4-benzoxazin-6-yl]-4,5,6,7-tetrahydro1H-isoindole-1,3(2H)-dione, in or on
artichoke, globe at 0.02 ppm; cabbage at
0.02 ppm; cabbage, Chinese, napa at
0.02 ppm; olive at 0.02 ppm;
pomegranate at 0.02 ppm; prickly pear,
fruit at 0.07 ppm; and prickly pear, pads
at 0.06 ppm.
VI. Statutory and Executive Order
Reviews
This final rule establishes tolerances
under FFDCA section 408(d) 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
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Federal Register / Vol. 78, No. 66 / Friday, April 5, 2013 / Rules and Regulations
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 FFDCA section 408(d), 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 FFDCA section 408(n)(4). As such,
the Agency has determined that this
action will not have a substantial direct
effect on States or tribal governments,
on the relationship between the national
government and the States or tribal
governments, or on the distribution of
power and responsibilities among the
various levels of government or between
the Federal Government and Indian
tribes. Thus, the Agency has determined
that Executive Order 13132, entitled
‘‘Federalism’’ (64 FR 43255, August 10,
1999) and Executive Order 13175,
entitled ‘‘Consultation and Coordination
with Indian Tribal Governments’’ (65 FR
67249, November 9, 2000) do not apply
to this final rule. In addition, this final
rule does not impose any enforceable
duty or contain any unfunded mandate
as described under Title II of the
Unfunded Mandates Reform Act of 1995
(UMRA) (2 U.S.C. 1501 et seq.).
This action does not involve any
technical standards that would require
Agency consideration of voluntary
consensus standards pursuant to section
12(d) of the National Technology
Transfer and Advancement Act of 1995
(NTTAA) (15 U.S.C. 272 note).
List of Subjects in 40 CFR Part 180
Environmental protection,
Administrative practice and procedure,
Agricultural commodities, Pesticides
and pests, Reporting and recordkeeping
requirements.
Dated: March 28, 2013.
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. In § 180.568, add alphabetically the
following commodities to the table in
paragraph (a) to read as follows:
■
§ 180.568 Flumioxazin; tolerances for
residues.
(a) * * *
Parts per
million
Commodity
*
*
*
*
Artichoke, globe ........................
*
0.02
*
*
*
*
Cabbage ...................................
Cabbage, Chinese, napa ..........
*
0.02
0.02
*
*
*
*
Olive ..........................................
*
0.02
*
*
*
*
Pomegranate ............................
Prickly pear, fruit .......................
Prickly pear, pads .....................
*
0.02
0.07
0.06
*
*
*
*
*
*
*
*
*
*
[FR Doc. 2013–07980 Filed 4–4–13; 8:45 am]
BILLING CODE 6560–50–P
DEPARTMENT OF HEALTH AND
HUMAN SERVICES
42 CFR Part 68
[Docket No. NIH–2008–0003]
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VII. Congressional Review Act
RIN 0905–AA43
Pursuant to the Congressional Review
Act (5 U.S.C. 801 et seq.), EPA will
submit a report containing this rule and
other required information to the U.S.
Senate, the U.S. House of
Representatives, and the Comptroller
General of the United States prior to
publication of the rule in the Federal
Register. This action is not a ‘‘major
rule’’ as defined by 5 U.S.C. 804(2).
National Institutes of Health Loan
Repayment Programs
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AGENCY:
National Institutes of Health,
HHS.
ACTION:
Final rule.
As a part of the Department
of Health and Human Services (HHS)’s
ongoing retrospective review initiative,
SUMMARY:
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the National Institutes of Health (NIH) is
rescinding the existing regulations for
two of its eight loan repayment
programs and issuing in their place a
new consolidated set of regulations
governing all of the NIH Loan
Repayment Programs (LRPs). There are
currently eight programs, including
three for researchers employed by the
NIH (Intramural LRPs) and five for nonNIH scientists (Extramural LRPs). The
Intramural LRPs include the Loan
Repayment Program for Research with
Respect to Acquired Immune Deficiency
Syndrome (or AIDS Research LRP);
Loan Repayment Program for General
Research (or General Research LRP),
which includes a program for the
Accreditation Council for Graduate
Medical Education (ACGME) Fellows;
and Loan Repayment Program for
Clinical Researchers from
Disadvantaged Backgrounds (or Clinical
Research LRP for Individuals from
Disadvantaged Backgrounds). The
Extramural LRPs include the Loan
Repayment Program for Contraception
and Infertility Research (or
Contraception and Infertility Research
LRP); Loan Repayment Program for
Clinical Researchers from
Disadvantaged Backgrounds (or Clinical
Research LRP for Individuals from
Disadvantaged Backgrounds); Loan
Repayment Program for Clinical
Research (or Clinical Research LRP);
Loan Repayment Program for Pediatric
Research (or Pediatric Research LRP);
and Loan Repayment Program for
Health Disparities Research (or Health
Disparities Research LRP).
DATES: This final rule is effective May 6,
2013.
FOR FURTHER INFORMATION CONTACT: Jerry
Moore, NIH Regulations Officer, Office
of Management Assessment, NIH, 6011
Executive Boulevard, Room 601, MSC
7669, Rockville, MD 20892; by email at
MooreJ@mail.nih.gov; by fax on 301–
402–0169 (not a toll-free number); or by
telephone 301–496–4607 (not a toll-free
number) for information about the
rulemaking process. For program
information, contact: NIH Division of
Loan Repayment by email lrp@nih.gov
or telephone 866–849–4047. For
information regarding the requirements,
the application deadline dates, and an
online application for the NIH Loan
Repayment Programs, refer to the NIH
Loan Repayment Program Web site,
www.lrp.nih.gov.
SUPPLEMENTARY INFORMATION: On
November 4, 1988, Congress enacted the
Health Omnibus Programs Extension of
1988, (Pub. L. 100–607). Title VI of this
law amended the Public Health Service
(PHS) Act by adding section 487A (42
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Agencies
[Federal Register Volume 78, Number 66 (Friday, April 5, 2013)]
[Rules and Regulations]
[Pages 20461-20466]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-07980]
=======================================================================
-----------------------------------------------------------------------
ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 180
[EPA-HQ-OPP-2012-0139; FRL-9381-7]
Flumioxazin; Pesticide Tolerances
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: This regulation establishes tolerances for residues of
flumioxazin in or on multiple commodities which are identified and
discussed later in this document. Interregional Research Project Number
4 (IR-4) requested these tolerances under the Federal Food, Drug, and
Cosmetic Act (FFDCA).
[[Page 20462]]
DATES: This regulation is effective April 5, 2013. Objections and
requests for hearings must be received on or before June 4, 2013, and
must be filed in accordance with the instructions provided in 40 CFR
part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).
ADDRESSES: The docket for this action, identified by docket
identification (ID) number EPA-HQ-OPP-2012-0139, is available at https://www.regulations.gov or at the Office of Pesticide Programs Regulatory
Public Docket (OPP Docket) in the Environmental Protection Agency
Docket Center (EPA/DC), EPA West Bldg., Rm. 3334, 1301 Constitution
Ave. NW., Washington, DC 20460-0001. The Public Reading Room is open
from 8:30 a.m. to 4:30 p.m., Monday through Friday, excluding legal
holidays. The telephone number for the Public Reading Room is (202)
566-1744, and the telephone number for the OPP Docket is (703) 305-
5805. Please review the visitor instructions and additional information
about the docket available at https://www.epa.gov/dockets.
FOR FURTHER INFORMATION CONTACT: Andrew Ertman, Registration Division
(7505P), Office of Pesticide Programs, Environmental Protection Agency,
1200 Pennsylvania Ave. NW., Washington, DC 20460-0001; telephone
number: (703) 308-9367; email address: ertman.andrew@epa.gov.
SUPPLEMENTARY INFORMATION:
I. General Information
A. Does this action apply to me?
You may be potentially affected by this action if you are an
agricultural producer, food manufacturer, or pesticide manufacturer.
The following list of North American Industrial Classification System
(NAICS) codes is not intended to be exhaustive, but rather provides a
guide to help readers determine whether this document applies to them.
Potentially affected entities may include:
Crop production (NAICS code 111).
Animal production (NAICS code 112).
Food manufacturing (NAICS code 311).
Pesticide manufacturing (NAICS code 32532).
B. How can I get electronic access to other related information?
You may access a frequently updated electronic version of EPA's
tolerance regulations at 40 CFR part 180 through the Government
Printing Office's e-CFR site at https://ecfr.gpoaccess.gov/cgi/t/text/text-idx?&c=ecfr&tpl=/ecfrbrowse/Title40/40tab_02.tpl.
C. How can I file an objection or hearing request?
Under FFDCA section 408(g), 21 U.S.C. 346a, any person may file an
objection to any aspect of this regulation and may also request a
hearing on those objections. You must file your objection or request a
hearing on this regulation in accordance with the instructions provided
in 40 CFR part 178. To ensure proper receipt by EPA, you must identify
docket ID number EPA-HQ-OPP-2012-0139 in the subject line on the first
page of your submission. All objections and requests for a hearing must
be in writing, and must be received by the Hearing Clerk on or before
June 4, 2013. Addresses for mail and hand delivery of objections and
hearing requests are provided in 40 CFR 178.25(b).
In addition to filing an objection or hearing request with the
Hearing Clerk as described in 40 CFR part 178, please submit a copy of
the filing (excluding any Confidential Business Information (CBI)) for
inclusion in the public docket. Information not marked confidential
pursuant to 40 CFR part 2 may be disclosed publicly by EPA without
prior notice. Submit the non-CBI copy of your objection or hearing
request, identified by docket ID number EPA-HQ-OPP-2012-0139, by one of
the following methods:
Federal eRulemaking Portal: https://www.regulations.gov.
Follow the online instructions for submitting comments. Do not submit
electronically any information you consider to be CBI or other
information whose disclosure is restricted by statute.
Mail: OPP Docket, Environmental Protection Agency Docket
Center (EPA/DC), (28221T), 1200 Pennsylvania Ave. NW., Washington, DC
20460-0001.
Hand Delivery: To make special arrangements for hand
delivery or delivery of boxed information, please follow the
instructions at https://www.epa.gov/dockets/contacts.htm.
Additional instructions on commenting or visiting the docket, along
with more information about dockets generally, is available at https://www.epa.gov/dockets.
II. Summary of Petitioned-For Tolerance
In the Federal Register of May 2, 2012 (77 FR 25954) (FRL-9346-1),
EPA issued a document pursuant to FFDCA section 408(d)(3), 21 U.S.C.
346a(d)(3), announcing the filing of a pesticide petition (PP 2E7982)
by IR-4, 500 College Road East, Suite 201 W, Princeton, NJ 08540. The
petition requested that 40 CFR 180.568 be amended by establishing
tolerances for residues of the herbicide flumioxazin, 2-[7-fluoro-3,4-
dihydro-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazin-6-yl]-4,5,6,7-
tetrahydro-1H-isoindole-1,3(2H)-dione, in or on artichoke at 0.02 parts
per million (ppm); cabbage and Chinese cabbage (tight-headed varieties
only) at 0.02 ppm; olives, and olive oil at 0.02 ppm; pomegranate at
0.02 ppm; cactus fruit at 0.1 ppm, and cactus pads at 0.05 ppm. That
document referenced a summary of the petition prepared by Valent U.S.A.
Corporation, the registrant, which is available in the docket, https://www.regulations.gov. There were no comments received in response to the
notice of filing.
Based upon review of the data supporting the petition, EPA has
modified the levels at which tolerances are being established for some
commodities. The reason for these changes is explained in Unit IV.C.
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 FFDCA section 408(b)(2)(D), and the factors
specified in FFDCA section 408(b)(2)(D), EPA has reviewed the available
scientific data and other relevant information in support of this
action. EPA has sufficient data to assess the hazards of and to make a
determination on aggregate exposure for flumioxazin including exposure
resulting from the tolerances established by this action. EPA's
assessment of exposures and risks associated with flumioxazin follows.
A. Toxicological Profile
EPA has evaluated the available toxicity data and considered its
validity,
[[Page 20463]]
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.
In general, flumioxazin has mild or low acute toxicity. Also, the
subchronic and chronic toxicity studies demonstrated that toxic effects
associated with flumioxazin include anemia as well as effects on the
liver and the cardiovascular system. Developmental effects were
observed in developmental rat studies but not in developmental rabbit
studies. Hematologic (hematopoietic) effects of anemia were noted in
rats, consisting of alterations in hemoglobin parameters. Increased
renal toxicity in male rats was also reported following chronic
exposure. There is no evidence of neurotoxicity or immunotoxicity in
the recently submitted guideline studies. Increased quantitative
susceptibility was seen in the rat developmental toxicity studies.
Fetal effects were observed in the absence of maternal toxicity. In
addition, both increased qualitative and quantitative susceptibility
were observed in the rat reproduction study. Severe fetal effects were
observed at lower doses than milder parental effects. In most of the
available mutagenicity studies, flumioxazin was negative for
mutagenicity; however, aberrations were seen in a chromosomal
aberration assay (CHO cells). Based on the lack of evidence of
carcinogenicity in mice and rats, flumioxazin is classified as ``not
likely to be carcinogenic to humans.''
Specific information on the studies received and the nature of the
adverse effects caused by flumioxazin 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 docket ID number EPA-HQ-OPP-2012-0139 on pages
43-48 of the document titled ``Flumioxazin. Human Health Risk
Assessment for the Proposed Uses on Artichoke, Cabbage, Olive,
Pomegranate, and Prickly Pear Cactus''.
B. Toxicological Points of Departure/Levels of Concern
Once a pesticide's toxicological profile is determined, EPA
identifies toxicological points of departure (POD) and levels of
concern to use in evaluating the risk posed by human exposure to the
pesticide. For hazards that have a threshold below which there is no
appreciable risk, the toxicological POD is used as the basis for
derivation of reference values for risk assessment. PODs are developed
based on a careful analysis of the doses in each toxicological study to
determine the dose at which no adverse effects are observed (the NOAEL)
and the lowest dose at which adverse effects of concern are identified
(the LOAEL). Uncertainty/safety factors are used in conjunction with
the POD to calculate a safe exposure level--generally referred to as a
population-adjusted dose (PAD) or a reference dose (RfD)--and a safe
margin of exposure (MOE). For non-threshold risks, the Agency assumes
that any amount of exposure will lead to some degree of risk. Thus, the
Agency estimates risk in terms of the probability of an occurrence of
the adverse effect expected in a lifetime. For more information on the
general principles EPA uses in risk characterization and a complete
description of the risk assessment process, see https://www.epa.gov/pesticides/factsheets/riskassess.htm.
A summary of the toxicological endpoints for flumioxazin used for
human risk assessment is discussed in Unit III.B. of the final rule
published in the Federal Register of September 21, 2012 (77 FR 58493)
(FRL-9358-3).
C. Exposure Assessment
1. Dietary exposure from food and feed uses. In evaluating dietary
exposure to flumioxazin, EPA considered exposure under the petitioned-
for tolerances as well as all existing flumioxazin tolerances in 40 CFR
180.568. EPA assessed dietary exposures from flumioxazin 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.
Such effects were identified for flumioxazin. In estimating acute
dietary exposure, EPA used food consumption information from the U.S.
Department of Agriculture's National Health and Nutrition Examination
Survey, What We Eat in America, (NHANES/WWEIA) from 2003-2008. As to
residue levels in food, EPA assumed tolerance level residues and 100
percent crop treated (PCT) for all proposed and registered commodities.
In addition, EPA used default concentration factors to estimate
residues of flumioxazin in processed commodities.
ii. Chronic exposure. In conducting the chronic dietary exposure
assessment EPA used the food consumption data from the USDA NHANES/
WWEIA from 2003-2008. As to residue levels in food, EPA assumed
tolerance level residues and 100 PCT for all proposed and registered
commodities. In addition, EPA used default concentration factors to
estimate residues of flumioxazin in processed commodities.
iii. Cancer. Based on the data summarized in Unit III.A., EPA has
concluded that flumioxazin does not pose a cancer risk to humans.
Therefore, a dietary exposure assessment for the purpose of assessing
cancer risk is unnecessary.
iv. Anticipated residue and PCT information. EPA did not use
anticipated residue and/or PCT information in the dietary assessment
for flumioxazin. Tolerance level residues and 100 PCT were assumed for
all food commodities.
2. Dietary exposure from drinking water. In the environment
flumioxazin photodegrades very rapidly in water and on soil.
Concentrations of flumioxazin and its major degradates (482-HA, APF,
and THPA) are expected to be found in water; however, flumioxazin and
the metabolites 482-HA and APF have been identified as the residues of
concern in drinking water.
To estimate concentrations of flumioxazin including its major
degradates of concern (482-HA and APF) in ground water, the Agency used
a screening level water exposure model in the dietary exposure analysis
and risk assessment. This simulation model took into account data on
the physical, chemical, and fate/transport characteristics of
flumioxazin. Since this chemical is currently registered for direct
applications to water, surface water estimates are based on the use of
flumioxazin as an aquatic herbicide where a maximum 400 parts per
billion (ppb) concentration is maintained. Hydrolysis is considered the
major route of dissipation for flumioxazin in the environment and the
levels of degradates (482-HA and APF) increase continuously with time.
Based on the Screening Concentration in Ground Water (SCI-GROW)
model the estimated drinking water concentrations (EDWCs) for both
acute and chronic exposures of 482-HA and APF are estimated to be 45.27
ppb and 2.66 ppb, respectively, in ground water. EDWCs of parent
flumioxazin are estimated to be negligible in ground water for both
acute and chronic exposures. For surface water, the EDWCs for
flumioxazin are estimated to be 400 ppb for acute exposures and no 482-
HA and APF is expected to be present. For chronic exposures, EDWCs of
flumioxazin and its major degradates
[[Page 20464]]
(482-HA and APF) are estimated to be 9.4, 21.6, and 110.1 ppb,
respectively, for surface water resulting in an EDWC of 142 ppb
(total).
Modeled estimates of drinking water concentrations were directly
entered into the dietary exposure model. For acute dietary risk
assessment, the water concentration value of 400 ppb was used to assess
the contribution to drinking water of flumioxazin. For chronic dietary
risk assessment, the water concentration of value 142 ppb (the total
EDWC for flumioxazin, 482-HA and APF in surface water) was used to
assess the contribution to drinking water of flumioxazin and its major
degradates (482-HA and APF).
Further information regarding EPA drinking water models used in
pesticide exposure assessment can be found at https://www.epa.gov/oppefed1/models/water/index.htm.
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).
Flumioxazin is currently registered for uses that could result in
residential exposures, including aquatic areas, ornamental gardens,
ornamental trees, turf, and golf courses. EPA assessed residential
exposure with the assumption that homeowner handlers wear shorts,
short-sleeved shirts, socks, and shoes, and that they complete all
tasks associated with the use of a pesticide product including mixing/
loading, if needed, as well as the application. Residential handler
exposure scenarios for both dermal and inhalation are considered to be
short-term only, due to the infrequent use patterns associated with
homeowner products.
EPA uses the term ``postapplication'' to describe exposure to
individuals that occur as a result of being in an environment that has
been previously treated with a pesticide. Flumioxazin is registered for
use in many areas that can be frequented by the general population
including residential areas, golf courses, lakes, and ponds. As a
result, individuals can be exposed by entering these areas if they have
been previously treated. Therefore, short-term and intermediate dermal
postapplication exposures and risks were assessed for adults and
children. In addition, oral post-application exposures and risks were
assessed for children to be protective of possible hand-to-mouth,
object-to-mouth, and soil ingestion activities that may occur on
treated turf areas. Further information regarding EPA standard
assumptions and generic inputs for residential exposures may be found
at https://www.epa.gov/pesticides/trac/science/trac6a05.pdf.
4. Cumulative effects from substances with a common mechanism of
toxicity. Section 408(b)(2)(D)(v) of FFDCA requires that, when
considering whether to establish, modify, or revoke a tolerance, the
Agency consider ``available information'' concerning the cumulative
effects of a particular pesticide's residues and ``other substances
that have a common mechanism of toxicity.''
EPA has not found flumioxazin to share a common mechanism of
toxicity with any other substances, and flumioxazin does not appear to
produce a toxic metabolite produced by other substances. For the
purposes of this tolerance action, therefore, EPA has assumed that
flumioxazin does not have a common mechanism of toxicity with other
substances. For information regarding EPA's efforts to determine which
chemicals have a common mechanism of toxicity and to evaluate the
cumulative effects of such chemicals, see EPA's Web site at https://www.epa.gov/pesticides/cumulative.
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 Safety
Factor (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. Evidence of increased
susceptibility to fetuses was observed in the oral and dermal
developmental rat studies i.e. cardiovascular anomalies (ventricular
septal defect) that occurred in the absence of maternal toxicity.
Additionally, the rat reproduction study demonstrated evidence of
qualitative and quantitative post-natal susceptibility because
reproductive effects in offspring were observed at doses lower than
those that caused parental/systemic toxicity, and because the
reproductive effects in offspring were considered to be more severe
than the parental/systemic effects.
3. Conclusion. EPA has determined that reliable data show the
safety of infants and children would be adequately protected if the
FQPA SF were reduced to 1X for oral and dermal exposures, but be
retained at 10X for inhalation exposures. That decision is based on the
following findings:
i. The toxicity database for flumioxazin is largely complete with
the exception of an inhalation developmental study, which was recently
determined necessary, in order to better assess route-specific
inhalation risks. In the absence of this study, a 10X FQPA safety
factor to account for database uncertainty is needed to protect the
safety of infants and children to assess risks for all inhalation
exposure scenarios. The toxicity profile can be characterized for all
effects, including potential developmental and reproductive toxicity,
immunotoxicity and neurotoxicity with the current database.
ii. There is no indication that flumioxazin is a neurotoxic
chemical and there is no need for a developmental neurotoxicity study
or additional UFs to account for neurotoxicity.
iii. Although increased susceptibility was seen in the rat
developmental and reproductive studies, EPA's concern for these effects
is low, and there are no residual uncertainties for pre- and/or
postnatal toxicity because:
a. The developmental toxicity NOAELs/LOAELs are well characterized
after oral and dermal exposure;
b. The offspring toxicity NOAEL and LOAEL are well characterized in
the reproduction study and
c. The points of departure for assessing risk to developing
fetuses, infants, and children have been selected either from the
developmental and reproductive toxicity studies from the chronic study
which established a lower point of departure for chronic effects than
the studies in pre- and postnatal animals. Thus, the regulatory
endpoints for flumioxazin are protective of the increased
susceptibility seen in the developmental and reproduction studies, and
there are no residual concerns for these effects.
iv. There are no residual uncertainties identified in the exposure
databases. The acute and chronic dietary analyses were based on
tolerance-level residues and 100 PCT assumptions for all commodities.
The dietary drinking water assessment utilized water concentration
values generated by model and associated modeling parameters which are
designed to provide conservative, health protective, high-end estimates
of water
[[Page 20465]]
concentrations. The residential exposure assessment incorporates
similarly conservative assumptions in the assessment of post-
application exposure to children and in the incidental oral exposure
assessment for children.
E. Aggregate Risks and Determination of Safety
EPA determines whether acute and chronic dietary pesticide
exposures are safe by comparing aggregate exposure estimates to the
acute PAD (aPAD) and chronic PAD (cPAD). For linear cancer risks, EPA
calculates the lifetime probability of acquiring cancer given the
estimated aggregate exposure. Short-, intermediate-, and chronic-term
risks are evaluated by comparing the estimated aggregate food, water,
and residential exposure to the appropriate PODs to ensure that an
adequate MOE exists.
1. Acute risk. Using the exposure assumptions discussed in this
unit for acute exposure, the acute dietary exposure from food and water
to flumioxazin will occupy 75% of the aPAD for females 13-49 years old,
the only population group of concern for acute risk.
2. Chronic risk. Using the exposure assumptions described in this
unit for chronic exposure, EPA has concluded that chronic exposure to
flumioxazin from food and water will utilize 44% of the cPAD for all
infants less than 1 year old, the population subgroup receiving the
greatest exposure. Based on the explanation in Unit III.C.3., regarding
residential use patterns, chronic residential exposure to residues of
flumioxazin is not expected.
3. Short-term risk. Short-term aggregate exposure takes into
account short-term residential exposure plus chronic exposure to food
and water (considered to be a background exposure level). Flumioxazin
is currently registered for uses that could result in short-term
residential exposure, and the Agency has determined that it is
appropriate to aggregate chronic exposure through food and water with
short-term residential exposures to flumioxazin.
Different methodologies were used for the presentation of short-
term aggregate risk for adults and children. An aggregate risk estimate
(ARI) approach was required to estimate short-term adult aggregate risk
because there are different levels of concern (LOCs) for adult dermal
and inhalation exposures, 100 and 1,000, respectively. For short-term
child aggregate risk, the combined MOE approach was used because the
endpoint of concern (decreased pup weight) and the LOC are the same.
Using the exposure assumptions described in this unit for short-term
exposures, EPA has concluded the combined short-term food, water, and
residential exposures result in aggregate ARI of 1.12 for adults and
aggregate MOE of 182 for children. Because EPA's level of concern for
flumioxazin is an ARI of 1 or below and a MOE of 100 or below, these
aggregate risk estimates are not of concern.
4. Intermediate-term risk. Intermediate-term aggregate exposure
takes into account intermediate-term residential exposure plus chronic
exposure to food and water (considered to be a background exposure
level). Since the short- and intermediate-term toxicological endpoints
for flumioxazin are the same for each route of exposure, only short-
term exposures were assessed.
5. Aggregate cancer risk for U.S. population. Based on the lack of
evidence of carcinogenicity in two adequate rodent carcinogenicity
studies, flumioxazin is not expected to pose a cancer risk to humans.
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 flumioxazin residues.
IV. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology (gas chromatography/nitrogen-
phosphorus detection (GC/NPD) method, Valent Method RM30-A-1) is
available to enforce the tolerance expression. The method may be
requested from: Chief, Analytical Chemistry Branch, Environmental
Science Center, 701 Mapes Rd., Ft. Meade, MD 20755-5350; telephone
number: (410) 305-2905; email address: residuemethods@epa.gov.
B. International Residue Limits
In making its tolerance decisions, EPA seeks to harmonize U.S.
tolerances with international standards whenever possible, consistent
with U.S. food safety standards and agricultural practices. EPA
considers the international maximum residue limits (MRLs) established
by the Codex Alimentarius Commission (Codex), as required by FFDCA
section 408(b)(4). The Codex Alimentarius is a joint United Nations
Food and Agriculture Organization/World Health Organization food
standards program, and it is recognized as an international food safety
standards-setting organization in trade agreements to which the United
States is a party. EPA may establish a tolerance that is different from
a Codex MRL; however, FFDCA section 408(b)(4) requires that EPA explain
the reasons for departing from the Codex level.
The Codex has not established MRLs for flumioxazin for any of the
commodities covered by this document.
C. Revisions to Petitioned-For Tolerances
The Agency has revised the levels for prickly pear cactus fruit and
pads from 0.1 and 0.05 to 0.07 and 0.06, respectively. The
modifications were due to the Agency's use of the Organization for
Economic Co-operation and Development (OECD) calculation procedures to
determine the appropriate tolerance levels.
Additionally, the petition proposed a tolerance for olive oil at
0.02 ppm. The Agency reviewed an olive oil processing study and found
that the residue levels found in olive oil were the same as those found
in olives. As such, the Agency has determined that a tolerance for
olive is appropriate, and a separate tolerance on olive oil is not
necessary.
V. Conclusion
Therefore, tolerances are established for residues of flumioxazin,
2-[7-fluoro-3,4-dihydro-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazin-6-yl]-
4,5,6,7-tetrahydro-1H-isoindole-1,3(2H)-dione, in or on artichoke,
globe at 0.02 ppm; cabbage at 0.02 ppm; cabbage, Chinese, napa at 0.02
ppm; olive at 0.02 ppm; pomegranate at 0.02 ppm; prickly pear, fruit at
0.07 ppm; and prickly pear, pads at 0.06 ppm.
VI. Statutory and Executive Order Reviews
This final rule establishes tolerances under FFDCA section 408(d)
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
[[Page 20466]]
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 FFDCA section 408(d), 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 FFDCA section 408(n)(4). As such, the Agency has determined that
this action will not have a substantial direct effect on States or
tribal governments, on the relationship between the national government
and the States or tribal governments, or on the distribution of power
and responsibilities among the various levels of government or between
the Federal Government and Indian tribes. Thus, the Agency has
determined that Executive Order 13132, entitled ``Federalism'' (64 FR
43255, August 10, 1999) and Executive Order 13175, entitled
``Consultation and Coordination with Indian Tribal Governments'' (65 FR
67249, November 9, 2000) do not apply to this final rule. In addition,
this final rule does not impose any enforceable duty or contain any
unfunded mandate as described under Title II of the Unfunded Mandates
Reform Act of 1995 (UMRA) (2 U.S.C. 1501 et seq.).
This action does not involve any technical standards that would
require Agency consideration of voluntary consensus standards pursuant
to section 12(d) of the National Technology Transfer and Advancement
Act of 1995 (NTTAA) (15 U.S.C. 272 note).
VII. Congressional Review Act
Pursuant to the Congressional Review Act (5 U.S.C. 801 et seq.),
EPA will submit a report containing this rule and other required
information to the U.S. Senate, the U.S. House of Representatives, and
the Comptroller General of the United States prior to publication of
the rule in the Federal Register. This action is not a ``major rule''
as defined by 5 U.S.C. 804(2).
List of Subjects in 40 CFR Part 180
Environmental protection, Administrative practice and procedure,
Agricultural commodities, Pesticides and pests, Reporting and
recordkeeping requirements.
Dated: March 28, 2013.
Lois Rossi,
Director, Registration Division, Office of Pesticide Programs.
Therefore, 40 CFR chapter I is amended as follows:
PART 180--[AMENDED]
0
1. The authority citation for part 180 continues to read as follows:
Authority: 21 U.S.C. 321(q), 346a and 371.
0
2. In Sec. 180.568, add alphabetically the following commodities to
the table in paragraph (a) to read as follows:
Sec. 180.568 Flumioxazin; tolerances for residues.
(a) * * *
------------------------------------------------------------------------
Parts per
Commodity million
------------------------------------------------------------------------
* * * * *
Artichoke, globe........................................... 0.02
* * * * *
Cabbage.................................................... 0.02
Cabbage, Chinese, napa..................................... 0.02
* * * * *
Olive...................................................... 0.02
* * * * *
Pomegranate................................................ 0.02
Prickly pear, fruit........................................ 0.07
Prickly pear, pads......................................... 0.06
* * * * *
------------------------------------------------------------------------
* * * * *
[FR Doc. 2013-07980 Filed 4-4-13; 8:45 am]
BILLING CODE 6560-50-P