80_FR_17760 80 FR 17697 - Difenoconazole; Pesticide Tolerances

80 FR 17697 - Difenoconazole; Pesticide Tolerances

ENVIRONMENTAL PROTECTION AGENCY

Federal Register Volume 80, Issue 63 (April 2, 2015)

Page Range17697-17703
FR Document2015-07354

This regulation establishes tolerances for residues of difenoconazole in or on multiple commodities which are identified and discussed later in this document. Syngenta Crop Protection requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).

Federal Register, Volume 80 Issue 63 (Thursday, April 2, 2015)
[Federal Register Volume 80, Number 63 (Thursday, April 2, 2015)]
[Rules and Regulations]
[Pages 17697-17703]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2015-07354]



[[Page 17697]]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 180

[EPA-HQ-OPP-2014-0149; FRL-9923-82]


Difenoconazole; Pesticide Tolerances

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: This regulation establishes tolerances for residues of 
difenoconazole in or on multiple commodities which are identified and 
discussed later in this document. Syngenta Crop Protection requested 
these tolerances under the Federal Food, Drug, and Cosmetic Act 
(FFDCA).

DATES: This regulation is effective April 2, 2015. Objections and 
requests for hearings must be received on or before June 1, 2015, and 
must be filed in accordance with the instructions provided in 40 CFR 
part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).

ADDRESSES: The docket for this action, identified by docket 
identification (ID) number EPA-HQ-OPP-2014-0149, is available at http://www.regulations.gov or at the Office of Pesticide Programs Regulatory 
Public Docket (OPP Docket) in the Environmental Protection Agency 
Docket Center (EPA/DC), West William Jefferson Clinton Bldg., Rm. 3334, 
1301 Constitution Ave. NW., Washington, DC 20460-0001. The Public 
Reading Room is open from 8:30 a.m. to 4:30 p.m., Monday through 
Friday, excluding legal holidays. The telephone number for the Public 
Reading Room is (202) 566-1744, and the telephone number for the OPP 
Docket is (703) 305-5805. Please review the visitor instructions and 
additional information about the docket available at http://www.epa.gov/dockets.

FOR FURTHER INFORMATION CONTACT: Susan Lewis, Registration Division 
(7505P), Office of Pesticide Programs, Environmental Protection Agency, 
1200 Pennsylvania Ave. NW., Washington, DC 20460-0001; main telephone 
number: (703) 305-7090; email address: [email protected].

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 
Publishing Office's e-CFR site at http://www.ecfr.gov/cgi-bin/text-idx?&c=ecfr&tpl=/ecfrbrowse/Title40/40tab_02.tpl.

C. How can I file an objection or hearing request?

    Under 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-2014-0149 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 1, 2015. Addresses for mail and hand delivery of objections and 
hearing requests are provided in 40 CFR 178.25(b).
    In addition to filing an objection or hearing request with the 
Hearing Clerk as described in 40 CFR part 178, please submit a copy of 
the filing (excluding any Confidential Business Information (CBI)) for 
inclusion in the public docket. Information not marked confidential 
pursuant to 40 CFR part 2 may be disclosed publicly by EPA without 
prior notice. Submit the non-CBI copy of your objection or hearing 
request, identified by docket ID number EPA-HQ-OPP-2014-0149, by one of 
the following methods:
     Federal eRulemaking Portal: http://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 http://www.epa.gov/dockets/contacts.html.
    Additional instructions on commenting or visiting the docket, along 
with more information about dockets generally, is available at http://www.epa.gov/dockets.

II. Summary of Petitioned-for Tolerance

    In the Federal Register of September 5, 2014 (79 FR 53009) (FRL-
9914-98), 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 
4F8231) by Syngenta Crop Protection, LLC., P.O. Box 18300, Greensboro, 
NC 27419-8300. The petition requested that 40 CFR part 180 be amended 
by establishing tolerances for residues of the fungicide, 
difenoconazole in or on pea, and bean, dried shelled, except soybean, 
subgroup 6C at 0.2 parts per million (ppm); pea, vine at 10 ppm; pea, 
hay at 40 ppm; and bushberry, subgroup 13-07B at 3.0 ppm. The petition 
also requested that the existing tolerance for chickpea be removed. 
That document referenced a summary of the petition prepared by 
Syngenta, the registrant, which is available in the docket identified 
by docket ID number EPA-HQ-OPP-2014-0373, http://www.regulations.gov. 
Comments were received on the notice of filing. EPA's response to these 
comments is discussed in Unit IV.C.
    In the Federal Register of February 11, 2015 (80 FR 7559) (FRL-
9921-94), 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 
3F8209) by Syngenta Crop Protection, LLC., P.O. Box 18300, Greensboro, 
NC 27419-8300. The petition requested that 40 CFR part 180 be amended 
by increasing existing tolerances for residues of the fungicide, 
difenoconazole in or on fruit, pome, group 11-10 from 1.0 to 3.0 ppm, 
and apple, wet pomace from 4.5 to 7.5 ppm. That document referenced a 
summary of the petition prepared by Syngenta Crop Protection, the 
registrant, which is available in the docket, http://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 some of the tolerances are being 
established. The reason for these changes are explained in Unit IV.D.

[[Page 17698]]

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 difenoconazole including 
exposure resulting from the tolerances established by this action. 
EPA's assessment of exposures and risks associated with difenoconazole 
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.
    Subchronic and chronic studies with difenoconazole in mice and rats 
showed decreased body weights, decreased body weight gains and effects 
on the liver.
    In an acute neurotoxicity study in rats, reduced fore-limb grip 
strength was observed on 1-day in males and clinical signs of 
neurotoxicity were observed in females at the limit dose of 2,000 
milligrams/kilograms (mg/kg). In a subchronic neurotoxicity study in 
rats, decreased hind limb strength was observed in males only at the 
mid- and high-doses. However, the effects observed in acute and 
subchronic neurotoxicity studies are transient, and the dose-response 
is well characterized with identified no-observed-adverse effects-
levels (NOAELs). No systemic toxicity was observed at the limit dose in 
the most recently submitted 28-day rat dermal toxicity study.
    There is no concern for increased qualitative and/or quantitative 
susceptibility after exposure to difenoconazole in developmental 
toxicity studies in rats and rabbits, and a reproduction study in rats 
as fetal/offspring effects occurred in the presence of maternal 
toxicity. Although there is some evidence that difenoconazole affects 
antibody levels at doses that cause systemic toxicity, there are no 
indications in the available studies that organs associated with immune 
function, such as the thymus and spleen, are affected by 
difenoconazole.
    EPA is using the non-linear (reference dose) approach to assess 
cancer risk. Difenoconazole is not mutagenic, and no evidence of 
carcinogenicity was seen in rats. Evidence for carcinogenicity was seen 
in mice (liver tumors), but statistically significant carcinomas tumors 
were only induced at excessively-high doses. Adenomas (benign tumors) 
and liver necrosis only were seen at 300 parts per million (ppm) (46 
and 58 mg/kg/day in males and females, respectively). Based on 
excessive toxicity observed at the two highest doses in the study, the 
presence of only benign tumors and necrosis at the mid-dose, the 
absence of tumors at the study's lower doses, and the absence of 
genotoxic effects, EPA has concluded that the chronic point of 
departure (POD) from the chronic mouse study will be protective of any 
cancer effects. The POD from this study is the NOAEL of 30 ppm (4.7 and 
5.6 mg/kg/day in males and females, respectively) which was chosen 
based upon only those biological endpoints which were relevant to tumor 
development (i.e., hepatocellular hypertrophy, liver necrosis, fatty 
changes in the liver and bile stasis).
    Specific information on the studies received and the nature of the 
adverse effects caused by difenoconazole 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 http://www.regulations.gov on page 44 of the document titled ``Difenoconazole: 
Human Health Risk Assessment for proposed new foliar uses on legume 
subgroup 6C and bushberry subgroup 13-07B; post-harvest uses on pome 
fruit group 11-10; and ornamental plants and vegetable transplants 
grown in both indoor and outdoor production facilities'' in docket ID 
number EPA-HQ-OPP-2014-0149.

B. Toxicological Points of Departure/Levels of Concern

    Once a pesticide's toxicological profile is determined, EPA 
identifies toxicological 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 http://www.epa.gov/pesticides/factsheets/riskassess.htm.
    A summary of the toxicological endpoints for difenoconazole used 
for human risk assessment is shown in Table 1 of this unit.

[[Page 17699]]



Table 1--Summary of Toxicological Doses and Endpoints for Difenoconazole for Use in Human Health Risk Assessment
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                                    Point of departure
        Exposure/scenario            and uncertainty/     RfD, PAD, LOC for     Study and toxicological effects
                                      safety factors       risk assessment
----------------------------------------------------------------------------------------------------------------
Acute dietary (All populations)..  NOAEL = 25 mg/kg/day  Acute RfD = 0.25 mg/ Acute neurotoxicity study in rats
                                   UFA = 10x...........   kg/day.             LOAEL= 200 mg/kg in males based on
                                   UFH = 10x...........  aPAD = 0.25 mg/kg/    reduced fore-limb grip strength
                                   FQPA SF = 1x........   day.                 in males on day 1.
Chronic dietary (All populations)  NOAEL= 0.96 mg/kg/    Chronic RfD = 0.01   Combined chronic toxicity/
                                    day.                  mg/kg/day.           carcinogenicity rat; dietary
                                   UFA = 10x...........  cPAD = 0.01 mg/kg/   LOAEL = 24.1/32.8 mg/kg/day (M/F)
                                   UFH = 10x...........   day.                 based on cumulative decreases in
                                   FQPA SF = 1x........                        body-weight gains.
Dermal Short-term (1-30 days)....  Oral NOAEL = 1.25 mg/ LOC for MOE = 100..  Reproduction and fertility Study
                                    kg/day dermal                              rat; dietary Parental/Offspring
                                    absorption rate =                         LOAEL = 12.5 mg/kg/day based on
                                    6%.                                        decreased pup weight in males on
                                   UFA = 10x...........                        day 21 and reduction in body-
                                   UFH = 10x...........                        weight gain of F0 females prior
                                   FQPA SF = 1x........                        to mating, gestation and
                                                                               lactation.
Inhalation short-term (1-30 days)  Oral NOAEL = 1.25 mg/ LOC for MOE = 100..  Reproduction and fertility Study
Inhalation and oral absorption      kg/day.                                    rat; dietary Parental/Offspring
 assumed equivalent.               UFA = 10x...........                       LOAEL = 12.5 mg/kg/day based on
                                   UFH = 10x...........                        decreased pup weight in males on
                                   FQPA SF = 1x........                        day 21 and reduction in body-
                                                                               weight gain of F0 females prior
                                                                               to mating, gestation and
                                                                               lactation.
Cancer (oral, dermal, inhalation)  The Agency is using a non-linear approach based on the chronic POD to assess
                                    the carcinogenic potential of difenoconazole.
----------------------------------------------------------------------------------------------------------------
FQPA SF = Food Quality Protection Act Safety Factor. LOAEL = lowest-observed-adverse-effect-level. LOC = level
  of concern. mg/kg/day = milligram/kilogram/day. MOE = margin of exposure. NOAEL = no-observed-adverse-effect-
  level. PAD = population adjusted dose (a = acute, c = chronic). RfD = reference dose. UF = uncertainty factor.
  UFA = extrapolation from animal to human (interspecies). UFH = potential variation in sensitivity among
  members of the human population (intraspecies).

C. Exposure Assessment

    1. Dietary exposure from food and feed uses. In evaluating dietary 
exposure to difenoconazole, EPA considered exposure under the 
petitioned-for tolerances as well as all existing difenoconazole 
tolerances in 40 CFR 180.475. EPA assessed dietary exposures from 
difenoconazole 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 difenoconazole. In estimating 
acute dietary exposure, EPA used 2003-2008 food consumption information 
from the United States Department of Agriculture's (USDA) National 
Health and Nutrition Examination Survey, What We Eat in America, 
(NHANES/WWEIA). As to residue levels in food, EPA assumed tolerance 
level residues and 100 percent crop treated (PCT) information.
    ii. Chronic exposure. In conducting the chronic dietary exposure 
assessment EPA used the food consumption data from the USDA's NHANES/
WWEIA. As to residue levels in food, EPA used USDA Pesticide Data 
Program (PDP) monitoring data, average field trial residues for some 
commodities, tolerance level residues for the remaining commodities, 
and average percent crop treated for some commodities.
    iii. Cancer. Based on the data summarized in Unit III.A., EPA has 
concluded that a nonlinear RfD approach is appropriate for assessing 
cancer risk to difenoconazole. Therefore, a separate quantitative 
cancer exposure assessment is unnecessary since the chronic dietary 
risk estimate will be protective of potential cancer risk.
    iv. Anticipated residue and PCT information. Section 408(b)(2)(E) 
of FFDCA authorizes EPA to use available data and information on the 
anticipated residue levels of pesticide residues in food and the actual 
levels of pesticide residues that have been measured in food. If EPA 
relies on such information, EPA must require pursuant to FFDCA section 
408(f)(1) that data be provided 5 years after the tolerance is 
established, modified, or left in effect, demonstrating that the levels 
in food are not above the levels anticipated. For the present action, 
EPA will issue such data call-ins as are required by FFDCA section 
408(b)(2)(E) and authorized under FFDCA section 408(f)(1). Data will be 
required to be submitted no later than 5 years from the date of 
issuance of these tolerances.
    Section 408(b)(2)(F) of FFDCA states that the Agency may use data 
on the actual percent of food treated for assessing chronic dietary 
risk only if:
     Condition a: The data used are reliable and provide a 
valid basis to show what percentage of the food derived from such crop 
is likely to contain the pesticide residue.
     Condition b: The exposure estimate does not underestimate 
exposure for any significant subpopulation group.
     Condition c: Data are available on pesticide use and food 
consumption in a particular area, the exposure estimate does not 
understate exposure for the population in such area.
    In addition, the Agency must provide for periodic evaluation of any 
estimates used. To provide for the periodic evaluation of the estimate 
of PCT as required by FFDCA section 408(b)(2)(F), EPA may require 
registrants to submit data on PCT.
    For the chronic dietary exposure analysis, the Agency estimated the 
PCT for existing uses as follows:
    Almond 5%, cabbage 2.5%, cucumbers 5%, garlic 5%, grape 5%, 
grapefruit 2.5%, onions 5%, orange 2.5%, pecan 2.5%, peach 1%, peppers

[[Page 17700]]

2.5%, pistachio 2.5%, pumpkin 2.5%, squash 5%, strawberry 2.5%, sugar 
beets 15%, tangerine 2.5%, tomatoes 25%, walnut 2.5%, watermelon 5%, 
and wheat 10%.
    In most cases, EPA uses available data from USDA/National 
Agricultural Statistics Service (NASS), proprietary market surveys, and 
the National Pesticide Use Database for the chemical/crop combination 
for the most recent 6-7 years. EPA uses an average PCT for chronic 
dietary risk analysis. The average PCT figure for each existing use is 
derived by combining available public and private market survey data 
for that use, averaging across all observations, and rounding to the 
nearest 5%, except for those situations in which the average PCT is 
less than one. In those cases, 1% is used as the average PCT and 2.5% 
is used as the maximum PCT. EPA uses a maximum PCT for acute dietary 
risk analysis. The maximum PCT figure is the highest observed maximum 
value reported within the recent 6 years of available public and 
private market survey data for the existing use and rounded up to the 
nearest multiple of 5%.
    The Agency believes that the three conditions discussed in Unit 
III.C.1.iv. have been met. With respect to Condition a, PCT estimates 
are derived from Federal and private market survey data, which are 
reliable and have a valid basis. The Agency is reasonably certain that 
the percentage of the food treated is not likely to be an 
underestimation. As to Conditions b and c, regional consumption 
information and consumption information for significant subpopulations 
is taken into account through EPA's computer-based model for evaluating 
the exposure of significant subpopulations including several regional 
groups. Use of this consumption information in EPA's risk assessment 
process ensures that EPA's exposure estimate does not understate 
exposure for any significant subpopulation group and allows the Agency 
to be reasonably certain that no regional population is exposed to 
residue levels higher than those estimated by the Agency. Other than 
the data available through national food consumption surveys, EPA does 
not have available reliable information on the regional consumption of 
food to which difenoconazole may be applied in a particular area.
    2. Dietary exposure from drinking water. The Agency used screening 
level water exposure models in the dietary exposure analysis and risk 
assessment for difenoconazole in drinking water. These simulation 
models take into account data on the physical, chemical, and fate/
transport characteristics of difenoconazole. Further information 
regarding EPA drinking water models used in pesticide exposure 
assessment can be found at http://www.epa.gov/oppefed1/models/water/index.htm.
    The drinking water assessment was performed using a total toxic 
residue (TTR) method which considers both parent difenoconazole and its 
major metabolite, CGA-205375, in surface and groundwater.
    Based on the surface water concentration calculator (SWCC) and 
screening concentration in ground water (SCI-GROW) and pesticide root 
zone model ground water (PRZM GW) models, the estimated drinking water 
concentrations (EDWCs) of difenoconazole for acute exposures are 
estimated to be 20.0 parts per billion (ppb) for surface water and 1.77 
ppb for ground water and for chronic exposure assessments are estimated 
to be 13.6 ppb for surface water and not detected for ground water.
    Modeled estimates of drinking water concentrations were directly 
entered into the dietary exposure model. For acute dietary risk 
assessment, the water concentration value of 20.0 ppb was used to 
assess the contribution to drinking water. For chronic dietary risk 
assessment, the water concentration of value 13.6 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).
    Difenoconazole is currently registered for the following uses that 
could result in residential exposures: Treatment of ornamental plants 
in commercial and residential landscapes and interior plantscapes. EPA 
assessed residential exposure using the following assumptions: For 
residential handlers, adult short-term dermal and inhalation exposure 
is expected from use on ornamentals (garden/trees). For residential 
post-application, short-term dermal exposure is expected for both 
adults and children from post-application activities in treated 
gardens.
    The scenarios used in the aggregate assessment were those that 
resulted in the highest exposures. The highest exposures consist of the 
following:
     Short-term dermal exposure to adults from post-application 
activities in treated gardens, and
     Short-term dermal exposure to children (6-11 years old) 
from post-application activities in treated gardens.
    Further information regarding EPA standard assumptions and generic 
inputs for residential exposures may be found at http://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.''
    Difenoconazole is a member of the triazole-containing class of 
pesticides. Although conazoles act similarly in plants (fungi) by 
inhibiting ergosterol biosynthesis, there is not necessarily a 
relationship between their pesticidal activity and their mechanism of 
toxicity in mammals. Structural similarities do not constitute a common 
mechanism of toxicity. Evidence is needed to establish that the 
chemicals operate by the same, or essentially the same, sequence of 
major biochemical events (EPA, 2002). In conazoles, however, a variable 
pattern of toxicological responses is found; some are hepatotoxic and 
hepatocarcinogenic in mice. Some induce thyroid tumors in rats. Some 
induce developmental, reproductive, and neurological effects in 
rodents. Furthermore, the conazoles produce a diverse range of 
biochemical events including altered cholesterol levels, stress 
responses, and altered DNA methylation. It is not clearly understood 
whether these biochemical events are directly connected to their 
toxicological outcomes. Thus, there is currently no evidence to 
indicate that conazoles share common mechanisms of toxicity and EPA is 
not following a cumulative risk approach based on a common mechanism of 
toxicity for the conazoles. For information regarding EPA's procedures 
for cumulating effects from substances found to have a common mechanism 
of toxicity, see EPA's Web site at http://www.epa.gov/pesticides/cumulative.
    Difenoconazole is a triazole-derived pesticide. This class of 
compounds can form the common metabolite 1,2,4-triazole and two 
triazole conjugates (triazolylalanine and triazolylacetic acid). To 
support existing tolerances and to establish new tolerances for 
triazole-derivative pesticides, including propiconazole, EPA conducted 
a human health risk assessment for exposure to 1,2,4-triazole, 
triazolylalanine, and triazolylacetic acid resulting from the use of 
all current and pending uses of any triazole-derived fungicide. The 
risk

[[Page 17701]]

assessment is a highly conservative, screening-level evaluation in 
terms of hazards associated with common metabolites (e.g., use of a 
maximum combination of uncertainty factors) and potential dietary and 
non-dietary exposures (i.e., high end estimates of both dietary and 
non-dietary exposures). In addition, the Agency retained the additional 
10X FQPA safety factor for the protection of infants and children. The 
assessment includes evaluations of risks for various subgroups, 
including those comprised of infants and children. The Agency's 
complete risk assessment is found in the propiconazole reregistration 
docket at http://www.regulations.gov, docket identification (ID) number 
EPA-HQ-OPP-2005-0497.
    The most recent update for the triazoles was conducted on October 
24, 2013. The requested new uses of difenoconazole did not 
significantly change the dietary exposure estimates for free triazole 
or conjugated triazoles. Therefore, an updated dietary exposure 
analysis was not conducted. The October 24, 2013 update for triazoles 
may be found in docket ID number EPA-HQ-OPP-2014-0149.

D. Safety Factor for Infants and Children

    1. In general. Section 408(b)(2)(C) of FFDCA provides that EPA 
shall apply an additional tenfold (10X) margin of safety for infants 
and children in the case of threshold effects to account for prenatal 
and postnatal toxicity and the completeness of the database on toxicity 
and exposure unless EPA determines based on reliable data that a 
different margin of safety will be safe for infants and children. This 
additional margin of safety is commonly referred to as the Food Quality 
Protection Act (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. The available Agency 
guideline studies indicated no increased qualitative or quantitative 
susceptibility of rats or rabbits to in utero and/or postnatal exposure 
to difenoconazole. In the prenatal developmental toxicity studies in 
rats and rabbits and the 2-generation reproduction study in rats, 
toxicity to the fetuses/offspring, when observed, occurred at 
equivalent or higher doses than in the maternal/parental animals.
    In a rat developmental toxicity study developmental effects were 
observed at doses higher than those which caused maternal toxicity. In 
the rabbit study, developmental effects (increases in post-implantation 
loss and resorptions and decreases in fetal body weight) were also seen 
at maternally toxic doses (decreased body weight gain and food 
consumption). In the 2-generation reproduction study in rats, toxicity 
to the fetuses/offspring, when observed, occurred at equivalent or 
higher doses than in the maternal/parental animals.
    3. Conclusion. EPA has determined that reliable data show the 
safety of infants and children would be adequately protected if the 
FQPA SF were reduced to 1X. That decision is based on the following 
findings:
    i. The toxicity database for difenoconazole is complete.
    ii. There are no clear signs of neurotoxicity following acute, 
subchronic or chronic dosing in multiple species in the difenoconazole 
database. The effects observed in acute and subchronic neurotoxicity 
studies are transient, and the dose-response is well characterized with 
identified NOAELs. Based on the toxicity profile, and lack of concern 
for neurotoxicity, there is no need for a developmental neurotoxicity 
study or additional UFs to account for neurotoxicity.
    iii. There is no evidence that difenoconazole results in increased 
susceptibility in in utero rats or rabbits in the prenatal 
developmental studies or in young rats in the 2-generation reproduction 
study.
    iv. There are no residual uncertainties identified in the exposure 
databases. The dietary risk assessment is conservative, using tolerance 
level residues and 100 PCT for the acute assessment while the chronic 
assessment used USDA PDP monitoring data, average field trial residues 
for some commodities, tolerance level residues for remaining 
commodities, and average PCT for some commodities. These assumptions 
will not underestimate dietary exposure to difenoconazole. EPA made 
conservative (protective) assumptions in the ground and surface water 
modeling used to assess exposure to difenoconazole in drinking water. 
EPA used similarly conservative assumptions to assess post-application 
exposure of children. These assessments will not underestimate the 
exposure and risks posed by difenoconazole.

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 difenoconazole will occupy 49% of the aPAD for all infants less than 
1 year old, the population group receiving the greatest exposure.
    2. Chronic risk. Using the exposure assumptions described in this 
unit for chronic exposure, EPA has concluded that chronic exposure to 
difenoconazole from food and water will utilize 88% of the cPAD for 
children 1-2 years old, the population group receiving the greatest 
exposure. Based on the explanation in Unit III.C.3., regarding 
residential use patterns, chronic residential exposure to residues of 
difenoconazole 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).
    Difenoconazole 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 difenoconazole.
    Using the exposure assumptions described in this unit for short-
term exposures, EPA has concluded the combined short-term food, water, 
and residential exposures result in aggregate MOEs of 170 for adults 
and 190 for children. Because EPA's level of concern for difenoconazole 
is a MOE of 100 or below, these MOEs are not of concern.
    4. Intermediate-term risk. Intermediate-term aggregate exposure 
takes into account intermediate-term residential exposure plus chronic 
exposure to food and water (considered to be a background exposure 
level).
    An intermediate-term adverse effect was identified; however, 
difenoconazole is not registered for any use patterns that would result 
in intermediate-term residential exposure. Intermediate-term risk is 
assessed based on intermediate-term residential exposure plus chronic 
dietary exposure. Because there is no intermediate-term residential 
exposure and chronic dietary exposure has already been assessed under 
the appropriately protective cPAD (which is

[[Page 17702]]

at least as protective as the POD used to assess intermediate-term 
risk), no further assessment of intermediate-term risk is necessary, 
and EPA relies on the chronic dietary risk assessment for evaluating 
intermediate-term risk for difenoconazole.
    5. Aggregate cancer risk for U.S. population. As discussed in Unit 
III.A, the chronic dietary risk assessment is protective of any 
potential cancer effects. Based on the results of that assessment, EPA 
concludes that difenoconazole 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 difenoconazole residues.

IV. Other Considerations

A. Analytical Enforcement Methodology

    An adequate enforcement method, GC/NPD method AG-575B, is available 
for the determination of residues of difenoconazole per se in/on plant 
commodities. An adequate enforcement method, liquid chromatography/mass 
spectrometry/mass spectrometry (LC/MS/MS) method REM 147.07b, is 
available for the determination of residues of difenoconazole and CGA-
205375 in livestock commodities. Adequate confirmatory methods are also 
available.
    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: 
[email protected].

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 an established MRL for the sum of difenoconazole and 
its metabolite, 1-[2-chloro-4-(4-chlorophenoxy)-phenyl]-2-(1,2,4-
triazol)-1-yl-ethano), expressed as difenoconazole in or on milk at 
0.02 ppm, which is the same as the recommended U.S. tolerance.
    The Codex has not established an MRL for difenoconazole in or on 
pea and bean, dried shelled, except soybean, subgroup 6C; bushberry 
subgroup 13-07B; pea, field, hay; pea, field, vines; or apple, wet 
pomace.
    The Codex has an established MRL for difenoconazole in or on pome 
fruit at 0.5 ppm for residues incurred from foliar uses of 
difenoconazole. This MRL differs from the recommended U.S. tolerance 
for difenoconazole in or on fruit, pome, group 11-10 at 5.0 ppm. The 
Codex MRL is not adequate to cover residues incurred from the proposed 
post-harvest uses in the United States; therefore, harmonization with 
Codex is not possible at this time.

C. Response to Comments

    Several comments were received in response to the notice of filing, 
however, all were concerned with effects to bees and related to other 
petitions and chemicals contained in the same notice of filing, not 
difenoconazole.

D. Revisions to Petitioned-for Tolerances

    The tolerance being established for the bushberry subgroup 13-07B 
is 4.0 ppm, not 3.0 ppm as proposed. This is due to the independent 
field trial determination which resulted in the exclusion of one of the 
trials from the Organization for Economic Cooperation and Development 
(OECD) tolerance calculation procedures. The tolerance being 
established for the pea and bean, dried shelled, except soybean, 
subgroup 6C tolerance is being set at 0.20 ppm, not 0.2 ppm, and is 
based on the current practice of setting tolerances to 2 significant 
figures. The established tolerance in milk is being increased from 0.01 
ppm to 0.02 ppm because of the new pea hay and vine feedstuffs which 
significantly increased the maximum reasonably balanced dietary 
estimate for dairy cattle. Furthermore, the Agency is establishing 
tolerances for the fruit, pome, group 11-10 and apple, wet pomace (5.0 
ppm and 25 ppm, respectively) at higher levels than requested (3.0 ppm 
and 7.5 ppm, respectively). The established tolerances for fruit, pome, 
group 11-10 take into account maximum tolerance estimates that may 
result from post-harvest application techniques for pome fruit. The 
established tolerances for apple, wet pomace was calculated based on 
the highest average field trial residues in or on apples and the 
average processing factor for wet pomace. Lastly, some commodity terms 
were modified to be consistent with Agency's preferred food and feed 
commodity vocabulary.

 V. Conclusion

    Therefore, tolerances are established for residues of 
difenoconazole, in or on bushberry subgroup 13-07B at 4.0 ppm; pea and 
bean, dried shelled, except soybean, subgroup 6C at 0.20 ppm; pea, 
field, hay at 40 ppm; and pea, field, vines at 10 ppm. Additionally, 
existing tolerances are modified as follows: Apple, wet pomace from 7.5 
ppm to 25 ppm; fruit, pome, group 11-10 from 3.0 to 5.0 ppm; and milk 
from 0.01 to 0.02 ppm. Lastly, the existing chickpea tolerance is 
removed as unnecessary since it is now covered by the pea and bean, 
dried shelled, except soybean, subgroup 6C tolerance.

VI. Statutory and Executive Order Reviews

    This action 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 action has been 
exempted from review under Executive Order 12866, this action is not 
subject to Executive Order 13211, entitled ``Actions Concerning 
Regulations That Significantly Affect Energy Supply, Distribution, or 
Use'' (66 FR 28355, May 22, 2001) or Executive Order 13045, entitled 
``Protection of Children from Environmental Health Risks and Safety 
Risks'' (62 FR 19885, April 23, 1997). This action does not contain any 
information collections subject to OMB approval under the Paperwork 
Reduction Act (PRA) (44 U.S.C. 3501 et seq.), nor does it require any 
special considerations under Executive Order 12898, entitled ``Federal 
Actions to Address Environmental Justice in Minority Populations and 
Low-Income Populations'' (59 FR 7629, February 16, 1994).
    Since tolerances and exemptions that are established 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

[[Page 17703]]

Flexibility Act (RFA) (5 U.S.C. 601 et seq.), do not apply.
    This action directly regulates growers, food processors, food 
handlers, and food retailers, not States or tribes, nor does this 
action alter the relationships or distribution of power and 
responsibilities established by Congress in the preemption provisions 
of FFDCA section 408(n)(4). As such, the Agency has determined that 
this action will not have a substantial direct effect on States or 
tribal governments, on the relationship between the national government 
and the States or tribal governments, or on the distribution of power 
and responsibilities among the various levels of government or between 
the Federal Government and Indian tribes. Thus, the Agency has 
determined that Executive Order 13132, entitled ``Federalism'' (64 FR 
43255, August 10, 1999) and Executive Order 13175, entitled 
``Consultation and Coordination with Indian Tribal Governments'' (65 FR 
67249, November 9, 2000) do not apply to this action. In addition, this 
action does not impose any enforceable duty or contain any unfunded 
mandate as described under Title II of the Unfunded Mandates Reform Act 
(UMRA) (2 U.S.C. 1501 et seq.).
    This action does not involve any technical standards that would 
require Agency consideration of voluntary consensus standards pursuant 
to section 12(d) of the National Technology Transfer and Advancement 
Act (NTTAA) (15 U.S.C. 272 note).

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 25, 2015.
Susan Lewis,
Director, Registration Division, Office of Pesticide Programs.

    Therefore, 40 CFR chapter I is amended as follows:

PART 180--[AMENDED]

0
1. The authority citation for part 180 continues to read as follows:

    Authority: 21 U.S.C. 321(q), 346a and 371.


0
2. In Sec.  180.475:
0
i. Remove ``Chickpea'' from the table in paragraph (a)(1).
    ii. Add alphabetically the entries for ``Bushberry subgroup 13-
07B'', ``Pea and bean, dried shelled, except soybean, subgroup 6C'', 
``Pea, field, hay'', and ``Pea, field, vines'' to the table in 
paragraph (a)(1).
0
iii. Revise the entries for ``Apple, wet pomace'' and ``Fruit, pome, 
group 11-10'' in the table in paragraph (a)(1).
0
iv. Revise the entry for ``Milk'' in the table in paragraph (a)(2).
    The amendments read as follows:


Sec.  180.475  Difenoconazole; tolerances for residues.

    (a) * * * (1) * * *

------------------------------------------------------------------------
                                                               Parts per
                          Commodity                             million
------------------------------------------------------------------------
 
                                * * * * *
Apple, wet pomace...........................................       25
 
                                * * * * *
Bushberry subgroup 13-07B...................................        4.0
 
                                * * * * *
Fruit, pome, group 11-10....................................        5.0
 
                                * * * * *
Pea and bean, dried shelled, except soybean, subgroup 6C....        0.20
Pea, field, hay.............................................       40
Pea, field, vines...........................................       10
 
                                * * * * *
------------------------------------------------------------------------

    (2) * * *

------------------------------------------------------------------------
                                                               Parts per
                          Commodity                             million
------------------------------------------------------------------------
 
                                * * * * *
Milk........................................................        0.02
 
                                * * * * *
------------------------------------------------------------------------

* * * * *
[FR Doc. 2015-07354 Filed 4-1-15; 8:45 am]
 BILLING CODE 6560-50-P



                                                                Federal Register / Vol. 80, No. 63 / Thursday, April 2, 2015 / Rules and Regulations                                       17697

                                            ENVIRONMENTAL PROTECTION                                provides a guide to help readers                        • Hand Delivery: To make special
                                            AGENCY                                                  determine whether this document                       arrangements for hand delivery or
                                                                                                    applies to them. Potentially affected                 delivery of boxed information, please
                                            40 CFR Part 180                                         entities may include:                                 follow the instructions at http://
                                            [EPA–HQ–OPP–2014–0149; FRL–9923–82]
                                                                                                      • Crop production (NAICS code 111).                 www.epa.gov/dockets/contacts.html.
                                                                                                      • Animal production (NAICS code                       Additional instructions on
                                            Difenoconazole; Pesticide Tolerances                    112).                                                 commenting or visiting the docket,
                                                                                                      • Food manufacturing (NAICS code                    along with more information about
                                            AGENCY:  Environmental Protection                       311).                                                 dockets generally, is available at
                                            Agency (EPA).                                             • Pesticide manufacturing (NAICS                    http://www.epa.gov/dockets.
                                            ACTION: Final rule.                                     code 32532).
                                                                                                                                                          II. Summary of Petitioned-for Tolerance
                                            SUMMARY:   This regulation establishes                  B. How can I get electronic access to
                                            tolerances for residues of                              other related information?                               In the Federal Register of September
                                            difenoconazole in or on multiple                                                                              5, 2014 (79 FR 53009) (FRL–9914–98),
                                                                                                      You may access a frequently updated                 EPA issued a document pursuant to
                                            commodities which are identified and                    electronic version of EPA’s tolerance
                                            discussed later in this document.                                                                             FFDCA section 408(d)(3), 21 U.S.C.
                                                                                                    regulations at 40 CFR part 180 through                346a(d)(3), announcing the filing of a
                                            Syngenta Crop Protection requested                      the Government Publishing Office’s e-
                                            these tolerances under the Federal Food,                                                                      pesticide petition (PP 4F8231) by
                                                                                                    CFR site at http://www.ecfr.gov/cgi-bin/              Syngenta Crop Protection, LLC., P.O.
                                            Drug, and Cosmetic Act (FFDCA).                         text-idx?&c=ecfr&tpl=/ecfrbrowse/
                                            DATES: This regulation is effective April
                                                                                                                                                          Box 18300, Greensboro, NC 27419–
                                                                                                    Title40/40tab_02.tpl.                                 8300. The petition requested that 40
                                            2, 2015. Objections and requests for
                                            hearings must be received on or before                  C. How can I file an objection or hearing             CFR part 180 be amended by
                                            June 1, 2015, and must be filed in                      request?                                              establishing tolerances for residues of
                                            accordance with the instructions                                                                              the fungicide, difenoconazole in or on
                                                                                                      Under FFDCA section 408(g), 21
                                            provided in 40 CFR part 178 (see also                                                                         pea, and bean, dried shelled, except
                                                                                                    U.S.C. 346a, any person may file an
                                            Unit I.C. of the SUPPLEMENTARY                                                                                soybean, subgroup 6C at 0.2 parts per
                                                                                                    objection to any aspect of this regulation
                                            INFORMATION).
                                                                                                                                                          million (ppm); pea, vine at 10 ppm; pea,
                                                                                                    and may also request a hearing on those
                                                                                                                                                          hay at 40 ppm; and bushberry, subgroup
                                            ADDRESSES:    The docket for this action,               objections. You must file your objection
                                                                                                                                                          13–07B at 3.0 ppm. The petition also
                                            identified by docket identification (ID)                or request a hearing on this regulation
                                                                                                                                                          requested that the existing tolerance for
                                            number EPA–HQ–OPP–2014–0149, is                         in accordance with the instructions
                                                                                                                                                          chickpea be removed. That document
                                            available at http://www.regulations.gov                 provided in 40 CFR part 178. To ensure
                                                                                                                                                          referenced a summary of the petition
                                            or at the Office of Pesticide Programs                  proper receipt by EPA, you must
                                                                                                                                                          prepared by Syngenta, the registrant,
                                            Regulatory Public Docket (OPP Docket)                   identify docket ID number EPA–HQ–
                                                                                                                                                          which is available in the docket
                                            in the Environmental Protection Agency                  OPP–2014–0149 in the subject line on
                                                                                                                                                          identified by docket ID number EPA–
                                            Docket Center (EPA/DC), West William                    the first page of your submission. All
                                                                                                                                                          HQ–OPP–2014–0373, http://
                                            Jefferson Clinton Bldg., Rm. 3334, 1301                 objections and requests for a hearing
                                                                                                                                                          www.regulations.gov. Comments were
                                            Constitution Ave. NW., Washington, DC                   must be in writing, and must be
                                                                                                                                                          received on the notice of filing. EPA’s
                                            20460–0001. The Public Reading Room                     received by the Hearing Clerk on or
                                                                                                                                                          response to these comments is
                                            is open from 8:30 a.m. to 4:30 p.m.,                    before June 1, 2015. Addresses for mail
                                                                                                                                                          discussed in Unit IV.C.
                                            Monday through Friday, excluding legal                  and hand delivery of objections and
                                                                                                    hearing requests are provided in 40 CFR                  In the Federal Register of February
                                            holidays. The telephone number for the
                                                                                                    178.25(b).                                            11, 2015 (80 FR 7559) (FRL–9921–94),
                                            Public Reading Room is (202) 566–1744,
                                                                                                      In addition to filing an objection or               EPA issued a document pursuant to
                                            and the telephone number for the OPP
                                                                                                    hearing request with the Hearing Clerk                FFDCA section 408(d)(3), 21 U.S.C.
                                            Docket is (703) 305–5805. Please review
                                                                                                    as described in 40 CFR part 178, please               346a(d)(3), announcing the filing of a
                                            the visitor instructions and additional
                                                                                                    submit a copy of the filing (excluding                pesticide petition (PP 3F8209) by
                                            information about the docket available
                                                                                                    any Confidential Business Information                 Syngenta Crop Protection, LLC., P.O.
                                            at http://www.epa.gov/dockets.
                                                                                                    (CBI)) for inclusion in the public docket.            Box 18300, Greensboro, NC 27419–
                                            FOR FURTHER INFORMATION CONTACT:                                                                              8300. The petition requested that 40
                                                                                                    Information not marked confidential
                                            Susan Lewis, Registration Division                                                                            CFR part 180 be amended by increasing
                                                                                                    pursuant to 40 CFR part 2 may be
                                            (7505P), Office of Pesticide Programs,                                                                        existing tolerances for residues of the
                                                                                                    disclosed publicly by EPA without prior
                                            Environmental Protection Agency, 1200                                                                         fungicide, difenoconazole in or on fruit,
                                                                                                    notice. Submit the non-CBI copy of your
                                            Pennsylvania Ave. NW., Washington,                                                                            pome, group 11–10 from 1.0 to 3.0 ppm,
                                                                                                    objection or hearing request, identified
                                            DC 20460–0001; main telephone                                                                                 and apple, wet pomace from 4.5 to 7.5
                                                                                                    by docket ID number EPA–HQ–OPP–
                                            number: (703) 305–7090; email address:                                                                        ppm. That document referenced a
                                                                                                    2014–0149, by one of the following
                                            RDFRNotices@epa.gov.                                                                                          summary of the petition prepared by
                                                                                                    methods:
                                            SUPPLEMENTARY INFORMATION:                                • Federal eRulemaking Portal: http://               Syngenta Crop Protection, the registrant,
                                            I. General Information                                  www.regulations.gov. Follow the online                which is available in the docket,
                                                                                                    instructions for submitting comments.                 http://www.regulations.gov. There were
                                            A. Does this action apply to me?                        Do not submit electronically any                      no comments received in response to
                                               You may be potentially affected by                   information you consider to be CBI or                 the notice of filing.
tkelley on DSK3SPTVN1PROD with RULES




                                            this action if you are an agricultural                  other information whose disclosure is                    Based upon review of the data
                                            producer, food manufacturer, or                         restricted by statute.                                supporting the petition, EPA has
                                            pesticide manufacturer. The following                     • Mail: OPP Docket, Environmental                   modified the levels at which some of the
                                            list of North American Industrial                       Protection Agency Docket Center (EPA/                 tolerances are being established. The
                                            Classification System (NAICS) codes is                  DC), (28221T), 1200 Pennsylvania Ave.                 reason for these changes are explained
                                            not intended to be exhaustive, but rather               NW., Washington, DC 20460–0001.                       in Unit IV.D.


                                       VerDate Sep<11>2014   22:43 Apr 01, 2015   Jkt 235001   PO 00000   Frm 00015   Fmt 4700   Sfmt 4700   E:\FR\FM\02APR1.SGM   02APR1


                                            17698               Federal Register / Vol. 80, No. 63 / Thursday, April 2, 2015 / Rules and Regulations

                                            III. Aggregate Risk Assessment and                      females at the limit dose of 2,000                       Specific information on the studies
                                            Determination of Safety                                 milligrams/kilograms (mg/kg). In a                    received and the nature of the adverse
                                               Section 408(b)(2)(A)(i) of FFDCA                     subchronic neurotoxicity study in rats,               effects caused by difenoconazole as well
                                            allows EPA to establish a tolerance (the                decreased hind limb strength was                      as the no-observed-adverse-effect-level
                                            legal limit for a pesticide chemical                    observed in males only at the mid- and                (NOAEL) and the lowest-observed-
                                            residue in or on a food) only if EPA                    high-doses. However, the effects                      adverse-effect-level (LOAEL) from the
                                                                                                    observed in acute and subchronic                      toxicity studies can be found at http://
                                            determines that the tolerance is ‘‘safe.’’
                                                                                                    neurotoxicity studies are transient, and              www.regulations.gov on page 44 of the
                                            Section 408(b)(2)(A)(ii) of FFDCA
                                                                                                    the dose-response is well characterized               document titled ‘‘Difenoconazole:
                                            defines ‘‘safe’’ to mean that ‘‘there is a
                                                                                                    with identified no-observed-adverse                   Human Health Risk Assessment for
                                            reasonable certainty that no harm will
                                                                                                    effects-levels (NOAELs). No systemic                  proposed new foliar uses on legume
                                            result from aggregate exposure to the
                                                                                                    toxicity was observed at the limit dose               subgroup 6C and bushberry subgroup
                                            pesticide chemical residue, including
                                                                                                    in the most recently submitted 28-day                 13–07B; post-harvest uses on pome fruit
                                            all anticipated dietary exposures and all
                                                                                                    rat dermal toxicity study.                            group 11–10; and ornamental plants
                                            other exposures for which there is                         There is no concern for increased
                                            reliable information.’’ This includes                                                                         and vegetable transplants grown in both
                                                                                                    qualitative and/or quantitative
                                            exposure through drinking water and in                                                                        indoor and outdoor production
                                                                                                    susceptibility after exposure to
                                            residential settings, but does not include                                                                    facilities’’ in docket ID number EPA–
                                                                                                    difenoconazole in developmental
                                            occupational exposure. Section                                                                                HQ–OPP–2014–0149.
                                                                                                    toxicity studies in rats and rabbits, and
                                            408(b)(2)(C) of FFDCA requires EPA to                   a reproduction study in rats as fetal/                B. Toxicological Points of Departure/
                                            give special consideration to exposure                  offspring effects occurred in the                     Levels of Concern
                                            of infants and children to the pesticide                presence of maternal toxicity. Although
                                            chemical residue in establishing a                      there is some evidence that                              Once a pesticide’s toxicological
                                            tolerance and to ‘‘ensure that there is a               difenoconazole affects antibody levels at             profile is determined, EPA identifies
                                            reasonable certainty that no harm will                  doses that cause systemic toxicity, there             toxicological POD and levels of concern
                                            result to infants and children from                     are no indications in the available                   to use in evaluating the risk posed by
                                            aggregate exposure to the pesticide                     studies that organs associated with                   human exposure to the pesticide. For
                                            chemical residue. . . .’’                               immune function, such as the thymus                   hazards that have a threshold below
                                               Consistent with FFDCA section                        and spleen, are affected by                           which there is no appreciable risk, the
                                            408(b)(2)(D), and the factors specified in              difenoconazole.                                       toxicological POD is used as the basis
                                            FFDCA section 408(b)(2)(D), EPA has                        EPA is using the non-linear (reference             for derivation of reference values for
                                            reviewed the available scientific data                  dose) approach to assess cancer risk.                 risk assessment. PODs are developed
                                            and other relevant information in                       Difenoconazole is not mutagenic, and                  based on a careful analysis of the doses
                                            support of this action. EPA has                         no evidence of carcinogenicity was seen               in each toxicological study to determine
                                            sufficient data to assess the hazards of                in rats. Evidence for carcinogenicity was             the dose at which no adverse effects are
                                            and to make a determination on                          seen in mice (liver tumors), but                      observed (the NOAEL) and the lowest
                                            aggregate exposure for difenoconazole                   statistically significant carcinomas                  dose at which adverse effects of concern
                                            including exposure resulting from the                   tumors were only induced at                           are identified (the LOAEL). Uncertainty/
                                            tolerances established by this action.                  excessively-high doses. Adenomas                      safety factors are used in conjunction
                                            EPA’s assessment of exposures and risks                 (benign tumors) and liver necrosis only               with the POD to calculate a safe
                                            associated with difenoconazole follows.                 were seen at 300 parts per million (ppm)              exposure level—generally referred to as
                                            A. Toxicological Profile                                (46 and 58 mg/kg/day in males and                     a population-adjusted dose (PAD) or a
                                                                                                    females, respectively). Based on                      reference dose (RfD)—and a safe margin
                                              EPA has evaluated the available                       excessive toxicity observed at the two                of exposure (MOE). For non-threshold
                                            toxicity data and considered its validity,              highest doses in the study, the presence              risks, the Agency assumes that any
                                            completeness, and reliability as well as                of only benign tumors and necrosis at                 amount of exposure will lead to some
                                            the relationship of the results of the                  the mid-dose, the absence of tumors at                degree of risk. Thus, the Agency
                                            studies to human risk. EPA has also                     the study’s lower doses, and the absence
                                            considered available information                                                                              estimates risk in terms of the probability
                                                                                                    of genotoxic effects, EPA has concluded
                                            concerning the variability of the                                                                             of an occurrence of the adverse effect
                                                                                                    that the chronic point of departure
                                            sensitivities of major identifiable                                                                           expected in a lifetime. For more
                                                                                                    (POD) from the chronic mouse study
                                            subgroups of consumers, including                                                                             information on the general principles
                                                                                                    will be protective of any cancer effects.
                                            infants and children.                                                                                         EPA uses in risk characterization and a
                                                                                                    The POD from this study is the NOAEL
                                              Subchronic and chronic studies with                                                                         complete description of the risk
                                                                                                    of 30 ppm (4.7 and 5.6 mg/kg/day in
                                            difenoconazole in mice and rats showed                  males and females, respectively) which                assessment process, see http://
                                            decreased body weights, decreased body                  was chosen based upon only those                      www.epa.gov/pesticides/factsheets/
                                            weight gains and effects on the liver.                  biological endpoints which were                       riskassess.htm.
                                              In an acute neurotoxicity study in                    relevant to tumor development (i.e.,                     A summary of the toxicological
                                            rats, reduced fore-limb grip strength was               hepatocellular hypertrophy, liver                     endpoints for difenoconazole used for
                                            observed on 1-day in males and clinical                 necrosis, fatty changes in the liver and              human risk assessment is shown in
                                            signs of neurotoxicity were observed in                 bile stasis).                                         Table 1 of this unit.
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                                                TABLE 1—SUMMARY OF TOXICOLOGICAL DOSES AND ENDPOINTS FOR DIFENOCONAZOLE FOR USE IN HUMAN HEALTH
                                                                                       RISK ASSESSMENT
                                                                                     Point of departure          RfD, PAD, LOC for
                                                   Exposure/scenario                  and uncertainty/                                                    Study and toxicological effects
                                                                                                                  risk assessment
                                                                                       safety factors

                                            Acute dietary (All populations) ..     NOAEL = 25 mg/kg/            Acute RfD = 0.25         Acute neurotoxicity study in rats
                                                                                      day.                        mg/kg/day.             LOAEL= 200 mg/kg in males based on reduced fore-limb grip
                                                                                   UFA = 10x ................   aPAD = 0.25 mg/kg/         strength in males on day 1.
                                                                                   UFH = 10x ................     day.
                                                                                   FQPA SF = 1x .........
                                            Chronic dietary (All populations)      NOAEL= 0.96 mg/              Chronic RfD = 0.01       Combined chronic toxicity/carcinogenicity rat; dietary
                                                                                      kg/day.                     mg/kg/day.             LOAEL = 24.1/32.8 mg/kg/day (M/F) based on cumulative de-
                                                                                   UFA = 10x ................   cPAD = 0.01 mg/kg/         creases in body-weight gains.
                                                                                   UFH = 10x ................     day.
                                                                                   FQPA SF = 1x .........
                                            Dermal Short-term (1–30 days)          Oral NOAEL = 1.25            LOC for MOE = 100        Reproduction and fertility Study rat; dietary Parental/Offspring
                                                                                      mg/kg/day dermal                                   LOAEL = 12.5 mg/kg/day based on decreased pup weight in
                                                                                      absorption rate =                                    males on day 21 and reduction in body-weight gain of F0 fe-
                                                                                      6%.                                                  males prior to mating, gestation and lactation.
                                                                                   UFA = 10x ................
                                                                                   UFH = 10x ................
                                                                                   FQPA SF = 1x .........
                                            Inhalation short-term (1–30            Oral NOAEL = 1.25            LOC for MOE = 100        Reproduction and fertility Study rat; dietary Parental/Offspring
                                              days).                                  mg/kg/day.                                         LOAEL = 12.5 mg/kg/day based on decreased pup weight in
                                            Inhalation and oral absorption         UFA = 10x ................                              males on day 21 and reduction in body-weight gain of F0 fe-
                                              assumed equivalent.                  UFH = 10x ................                              males prior to mating, gestation and lactation.
                                                                                   FQPA SF = 1x .........
                                            Cancer (oral, dermal, inhala-          The Agency is using a        non-linear approach based on the chronic POD to assess the carcinogenic potential of
                                              tion).                               difenoconazole.
                                              FQPA SF = Food Quality Protection Act Safety Factor. LOAEL = lowest-observed-adverse-effect-level. LOC = level of concern. mg/kg/day =
                                            milligram/kilogram/day. MOE = margin of exposure. NOAEL = no-observed-adverse-effect-level. PAD = population adjusted dose (a = acute, c =
                                            chronic). RfD = reference dose. UF = uncertainty factor. UFA = extrapolation from animal to human (interspecies). UFH = potential variation in
                                            sensitivity among members of the human population (intraspecies).


                                            C. Exposure Assessment                                  USDA Pesticide Data Program (PDP)                     FFDCA section 408(f)(1). Data will be
                                               1. Dietary exposure from food and                    monitoring data, average field trial                  required to be submitted no later than
                                            feed uses. In evaluating dietary                        residues for some commodities,                        5 years from the date of issuance of
                                            exposure to difenoconazole, EPA                         tolerance level residues for the                      these tolerances.
                                                                                                    remaining commodities, and average                      Section 408(b)(2)(F) of FFDCA states
                                            considered exposure under the
                                                                                                    percent crop treated for some                         that the Agency may use data on the
                                            petitioned-for tolerances as well as all
                                                                                                    commodities.                                          actual percent of food treated for
                                            existing difenoconazole tolerances in 40
                                                                                                       iii. Cancer. Based on the data                     assessing chronic dietary risk only if:
                                            CFR 180.475. EPA assessed dietary                                                                               • Condition a: The data used are
                                            exposures from difenoconazole in food                   summarized in Unit III.A., EPA has
                                                                                                    concluded that a nonlinear RfD                        reliable and provide a valid basis to
                                            as follows:                                                                                                   show what percentage of the food
                                               i. Acute exposure. Quantitative acute                approach is appropriate for assessing
                                                                                                    cancer risk to difenoconazole.                        derived from such crop is likely to
                                            dietary exposure and risk assessments                                                                         contain the pesticide residue.
                                            are performed for a food-use pesticide,                 Therefore, a separate quantitative cancer
                                                                                                                                                            • Condition b: The exposure estimate
                                            if a toxicological study has indicated the              exposure assessment is unnecessary
                                                                                                                                                          does not underestimate exposure for any
                                            possibility of an effect of concern                     since the chronic dietary risk estimate
                                                                                                                                                          significant subpopulation group.
                                            occurring as a result of a 1-day or single              will be protective of potential cancer                  • Condition c: Data are available on
                                            exposure.                                               risk.                                                 pesticide use and food consumption in
                                               Such effects were identified for                        iv. Anticipated residue and PCT                    a particular area, the exposure estimate
                                            difenoconazole. In estimating acute                     information. Section 408(b)(2)(E) of                  does not understate exposure for the
                                            dietary exposure, EPA used 2003–2008                    FFDCA authorizes EPA to use available                 population in such area.
                                            food consumption information from the                   data and information on the anticipated                 In addition, the Agency must provide
                                            United States Department of                             residue levels of pesticide residues in               for periodic evaluation of any estimates
                                            Agriculture’s (USDA) National Health                    food and the actual levels of pesticide               used. To provide for the periodic
                                            and Nutrition Examination Survey,                       residues that have been measured in                   evaluation of the estimate of PCT as
                                            What We Eat in America, (NHANES/                        food. If EPA relies on such information,              required by FFDCA section 408(b)(2)(F),
                                            WWEIA). As to residue levels in food,                   EPA must require pursuant to FFDCA                    EPA may require registrants to submit
                                            EPA assumed tolerance level residues                    section 408(f)(1) that data be provided 5             data on PCT.
                                            and 100 percent crop treated (PCT)                      years after the tolerance is established,               For the chronic dietary exposure
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                                            information.                                            modified, or left in effect, demonstrating            analysis, the Agency estimated the PCT
                                               ii. Chronic exposure. In conducting                  that the levels in food are not above the             for existing uses as follows:
                                            the chronic dietary exposure assessment                 levels anticipated. For the present                     Almond 5%, cabbage 2.5%,
                                            EPA used the food consumption data                      action, EPA will issue such data call-ins             cucumbers 5%, garlic 5%, grape 5%,
                                            from the USDA’s NHANES/WWEIA. As                        as are required by FFDCA section                      grapefruit 2.5%, onions 5%, orange
                                            to residue levels in food, EPA used                     408(b)(2)(E) and authorized under                     2.5%, pecan 2.5%, peach 1%, peppers


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                                            17700               Federal Register / Vol. 80, No. 63 / Thursday, April 2, 2015 / Rules and Regulations

                                            2.5%, pistachio 2.5%, pumpkin 2.5%,                     and fate/transport characteristics of                    Further information regarding EPA
                                            squash 5%, strawberry 2.5%, sugar                       difenoconazole. Further information                   standard assumptions and generic
                                            beets 15%, tangerine 2.5%, tomatoes                     regarding EPA drinking water models                   inputs for residential exposures may be
                                            25%, walnut 2.5%, watermelon 5%, and                    used in pesticide exposure assessment                 found at http://www.epa.gov/pesticides/
                                            wheat 10%.                                              can be found at http://www.epa.gov/                   trac/science/trac6a05.pdf.
                                               In most cases, EPA uses available data               oppefed1/models/water/index.htm.                         4. Cumulative effects from substances
                                            from USDA/National Agricultural                            The drinking water assessment was                  with a common mechanism of toxicity.
                                            Statistics Service (NASS), proprietary                  performed using a total toxic residue                 Section 408(b)(2)(D)(v) of FFDCA
                                            market surveys, and the National                        (TTR) method which considers both                     requires that, when considering whether
                                            Pesticide Use Database for the chemical/                parent difenoconazole and its major                   to establish, modify, or revoke a
                                            crop combination for the most recent 6–                 metabolite, CGA–205375, in surface and                tolerance, the Agency consider
                                            7 years. EPA uses an average PCT for                    groundwater.                                          ‘‘available information’’ concerning the
                                            chronic dietary risk analysis. The                         Based on the surface water                         cumulative effects of a particular
                                            average PCT figure for each existing use                concentration calculator (SWCC) and                   pesticide’s residues and ‘‘other
                                            is derived by combining available                       screening concentration in ground water               substances that have a common
                                            public and private market survey data                   (SCI–GROW) and pesticide root zone                    mechanism of toxicity.’’
                                            for that use, averaging across all                      model ground water (PRZM GW)                             Difenoconazole is a member of the
                                            observations, and rounding to the                       models, the estimated drinking water                  triazole-containing class of pesticides.
                                            nearest 5%, except for those situations                 concentrations (EDWCs) of                             Although conazoles act similarly in
                                            in which the average PCT is less than                   difenoconazole for acute exposures are                plants (fungi) by inhibiting ergosterol
                                            one. In those cases, 1% is used as the                  estimated to be 20.0 parts per billion                biosynthesis, there is not necessarily a
                                            average PCT and 2.5% is used as the                     (ppb) for surface water and 1.77 ppb for              relationship between their pesticidal
                                            maximum PCT. EPA uses a maximum                         ground water and for chronic exposure                 activity and their mechanism of toxicity
                                            PCT for acute dietary risk analysis. The                assessments are estimated to be 13.6                  in mammals. Structural similarities do
                                            maximum PCT figure is the highest                       ppb for surface water and not detected                not constitute a common mechanism of
                                            observed maximum value reported                                                                               toxicity. Evidence is needed to establish
                                                                                                    for ground water.
                                            within the recent 6 years of available                                                                        that the chemicals operate by the same,
                                                                                                       Modeled estimates of drinking water
                                            public and private market survey data                                                                         or essentially the same, sequence of
                                                                                                    concentrations were directly entered
                                            for the existing use and rounded up to                                                                        major biochemical events (EPA, 2002).
                                                                                                    into the dietary exposure model. For
                                            the nearest multiple of 5%.                                                                                   In conazoles, however, a variable
                                                                                                    acute dietary risk assessment, the water
                                               The Agency believes that the three                                                                         pattern of toxicological responses is
                                                                                                    concentration value of 20.0 ppb was
                                            conditions discussed in Unit III.C.1.iv.                                                                      found; some are hepatotoxic and
                                                                                                    used to assess the contribution to                    hepatocarcinogenic in mice. Some
                                            have been met. With respect to
                                            Condition a, PCT estimates are derived                  drinking water. For chronic dietary risk              induce thyroid tumors in rats. Some
                                            from Federal and private market survey                  assessment, the water concentration of                induce developmental, reproductive,
                                            data, which are reliable and have a valid               value 13.6 ppb was used to assess the                 and neurological effects in rodents.
                                            basis. The Agency is reasonably certain                 contribution to drinking water.                       Furthermore, the conazoles produce a
                                            that the percentage of the food treated                    3. From non-dietary exposure. The                  diverse range of biochemical events
                                            is not likely to be an underestimation.                 term ‘‘residential exposure’’ is used in              including altered cholesterol levels,
                                            As to Conditions b and c, regional                      this document to refer to non-                        stress responses, and altered DNA
                                            consumption information and                             occupational, non-dietary exposure                    methylation. It is not clearly understood
                                            consumption information for significant                 (e.g., for lawn and garden pest control,              whether these biochemical events are
                                            subpopulations is taken into account                    indoor pest control, termiticides, and                directly connected to their toxicological
                                            through EPA’s computer-based model                      flea and tick control on pets).                       outcomes. Thus, there is currently no
                                            for evaluating the exposure of                             Difenoconazole is currently registered             evidence to indicate that conazoles
                                            significant subpopulations including                    for the following uses that could result              share common mechanisms of toxicity
                                            several regional groups. Use of this                    in residential exposures: Treatment of                and EPA is not following a cumulative
                                            consumption information in EPA’s risk                   ornamental plants in commercial and                   risk approach based on a common
                                            assessment process ensures that EPA’s                   residential landscapes and interior                   mechanism of toxicity for the conazoles.
                                            exposure estimate does not understate                   plantscapes. EPA assessed residential                 For information regarding EPA’s
                                            exposure for any significant                            exposure using the following                          procedures for cumulating effects from
                                            subpopulation group and allows the                      assumptions: For residential handlers,                substances found to have a common
                                            Agency to be reasonably certain that no                 adult short-term dermal and inhalation                mechanism of toxicity, see EPA’s Web
                                            regional population is exposed to                       exposure is expected from use on                      site at http://www.epa.gov/pesticides/
                                            residue levels higher than those                        ornamentals (garden/trees). For                       cumulative.
                                            estimated by the Agency. Other than the                 residential post-application, short-term                 Difenoconazole is a triazole-derived
                                            data available through national food                    dermal exposure is expected for both                  pesticide. This class of compounds can
                                            consumption surveys, EPA does not                       adults and children from post-                        form the common metabolite 1,2,4-
                                            have available reliable information on                  application activities in treated gardens.            triazole and two triazole conjugates
                                            the regional consumption of food to                        The scenarios used in the aggregate                (triazolylalanine and triazolylacetic
                                            which difenoconazole may be applied                     assessment were those that resulted in                acid). To support existing tolerances
                                            in a particular area.                                   the highest exposures. The highest                    and to establish new tolerances for
                                               2. Dietary exposure from drinking                    exposures consist of the following:                   triazole-derivative pesticides, including
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                                            water. The Agency used screening level                     • Short-term dermal exposure to                    propiconazole, EPA conducted a human
                                            water exposure models in the dietary                    adults from post-application activities               health risk assessment for exposure to
                                            exposure analysis and risk assessment                   in treated gardens, and                               1,2,4-triazole, triazolylalanine, and
                                            for difenoconazole in drinking water.                      • Short-term dermal exposure to                    triazolylacetic acid resulting from the
                                            These simulation models take into                       children (6–11 years old) from post-                  use of all current and pending uses of
                                            account data on the physical, chemical,                 application activities in treated gardens.            any triazole-derived fungicide. The risk


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                                                                Federal Register / Vol. 80, No. 63 / Thursday, April 2, 2015 / Rules and Regulations                                        17701

                                            assessment is a highly conservative,                    developmental effects (increases in post-             probability of acquiring cancer given the
                                            screening-level evaluation in terms of                  implantation loss and resorptions and                 estimated aggregate exposure. Short-,
                                            hazards associated with common                          decreases in fetal body weight) were                  intermediate-, and chronic-term risks
                                            metabolites (e.g., use of a maximum                     also seen at maternally toxic doses                   are evaluated by comparing the
                                            combination of uncertainty factors) and                 (decreased body weight gain and food                  estimated aggregate food, water, and
                                            potential dietary and non-dietary                       consumption). In the 2-generation                     residential exposure to the appropriate
                                            exposures (i.e., high end estimates of                  reproduction study in rats, toxicity to               PODs to ensure that an adequate MOE
                                            both dietary and non-dietary exposures).                the fetuses/offspring, when observed,                 exists.
                                            In addition, the Agency retained the                    occurred at equivalent or higher doses                   1. Acute risk. Using the exposure
                                            additional 10X FQPA safety factor for                   than in the maternal/parental animals.                assumptions discussed in this unit for
                                            the protection of infants and children.                   3. Conclusion. EPA has determined                   acute exposure, the acute dietary
                                            The assessment includes evaluations of                  that reliable data show the safety of                 exposure from food and water to
                                            risks for various subgroups, including                  infants and children would be                         difenoconazole will occupy 49% of the
                                            those comprised of infants and children.                adequately protected if the FQPA SF                   aPAD for all infants less than 1 year old,
                                            The Agency’s complete risk assessment                   were reduced to 1X. That decision is                  the population group receiving the
                                            is found in the propiconazole                           based on the following findings:                      greatest exposure.
                                            reregistration docket at http://                          i. The toxicity database for                           2. Chronic risk. Using the exposure
                                            www.regulations.gov, docket                             difenoconazole is complete.                           assumptions described in this unit for
                                            identification (ID) number EPA–HQ–                        ii. There are no clear signs of                     chronic exposure, EPA has concluded
                                            OPP–2005–0497.                                          neurotoxicity following acute,                        that chronic exposure to difenoconazole
                                               The most recent update for the                       subchronic or chronic dosing in                       from food and water will utilize 88% of
                                            triazoles was conducted on October 24,                  multiple species in the difenoconazole                the cPAD for children 1–2 years old, the
                                            2013. The requested new uses of                         database. The effects observed in acute               population group receiving the greatest
                                            difenoconazole did not significantly                    and subchronic neurotoxicity studies                  exposure. Based on the explanation in
                                            change the dietary exposure estimates                   are transient, and the dose-response is               Unit III.C.3., regarding residential use
                                            for free triazole or conjugated triazoles.              well characterized with identified                    patterns, chronic residential exposure to
                                            Therefore, an updated dietary exposure                  NOAELs. Based on the toxicity profile,                residues of difenoconazole is not
                                            analysis was not conducted. The                         and lack of concern for neurotoxicity,                expected.
                                            October 24, 2013 update for triazoles                   there is no need for a developmental                     3. Short-term risk. Short-term
                                            may be found in docket ID number                        neurotoxicity study or additional UFs to              aggregate exposure takes into account
                                            EPA–HQ–OPP–2014–0149.                                   account for neurotoxicity.                            short-term residential exposure plus
                                                                                                      iii. There is no evidence that                      chronic exposure to food and water
                                            D. Safety Factor for Infants and                        difenoconazole results in increased                   (considered to be a background
                                            Children                                                susceptibility in in utero rats or rabbits            exposure level).
                                              1. In general. Section 408(b)(2)(C) of                in the prenatal developmental studies or                 Difenoconazole is currently registered
                                            FFDCA provides that EPA shall apply                     in young rats in the 2-generation                     for uses that could result in short-term
                                            an additional tenfold (10X) margin of                   reproduction study.                                   residential exposure, and the Agency
                                            safety for infants and children in the                    iv. There are no residual uncertainties             has determined that it is appropriate to
                                            case of threshold effects to account for                identified in the exposure databases.                 aggregate chronic exposure through food
                                            prenatal and postnatal toxicity and the                 The dietary risk assessment is                        and water with short-term residential
                                            completeness of the database on toxicity                conservative, using tolerance level                   exposures to difenoconazole.
                                            and exposure unless EPA determines                      residues and 100 PCT for the acute                       Using the exposure assumptions
                                            based on reliable data that a different                 assessment while the chronic                          described in this unit for short-term
                                            margin of safety will be safe for infants               assessment used USDA PDP monitoring                   exposures, EPA has concluded the
                                            and children. This additional margin of                 data, average field trial residues for                combined short-term food, water, and
                                            safety is commonly referred to as the                   some commodities, tolerance level                     residential exposures result in aggregate
                                            Food Quality Protection Act (FQPA)                      residues for remaining commodities,                   MOEs of 170 for adults and 190 for
                                            Safety Factor (SF). In applying this                    and average PCT for some commodities.                 children. Because EPA’s level of
                                            provision, EPA either retains the default               These assumptions will not                            concern for difenoconazole is a MOE of
                                            value of 10X, or uses a different                       underestimate dietary exposure to                     100 or below, these MOEs are not of
                                            additional safety factor when reliable                  difenoconazole. EPA made conservative                 concern.
                                            data available to EPA support the choice                (protective) assumptions in the ground                   4. Intermediate-term risk.
                                            of a different factor.                                  and surface water modeling used to                    Intermediate-term aggregate exposure
                                              2. Prenatal and postnatal sensitivity.                assess exposure to difenoconazole in                  takes into account intermediate-term
                                            The available Agency guideline studies                  drinking water. EPA used similarly                    residential exposure plus chronic
                                            indicated no increased qualitative or                   conservative assumptions to assess post-              exposure to food and water (considered
                                            quantitative susceptibility of rats or                  application exposure of children. These               to be a background exposure level).
                                            rabbits to in utero and/or postnatal                    assessments will not underestimate the                   An intermediate-term adverse effect
                                            exposure to difenoconazole. In the                      exposure and risks posed by                           was identified; however, difenoconazole
                                            prenatal developmental toxicity studies                 difenoconazole.                                       is not registered for any use patterns
                                            in rats and rabbits and the 2-generation                                                                      that would result in intermediate-term
                                            reproduction study in rats, toxicity to                 E. Aggregate Risks and Determination of               residential exposure. Intermediate-term
                                            the fetuses/offspring, when observed,                   Safety                                                risk is assessed based on intermediate-
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                                            occurred at equivalent or higher doses                     EPA determines whether acute and                   term residential exposure plus chronic
                                            than in the maternal/parental animals.                  chronic dietary pesticide exposures are               dietary exposure. Because there is no
                                              In a rat developmental toxicity study                 safe by comparing aggregate exposure                  intermediate-term residential exposure
                                            developmental effects were observed at                  estimates to the acute PAD (aPAD) and                 and chronic dietary exposure has
                                            doses higher than those which caused                    chronic PAD (cPAD). For linear cancer                 already been assessed under the
                                            maternal toxicity. In the rabbit study,                 risks, EPA calculates the lifetime                    appropriately protective cPAD (which is


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                                            17702               Federal Register / Vol. 80, No. 63 / Thursday, April 2, 2015 / Rules and Regulations

                                            at least as protective as the POD used to               EPA explain the reasons for departing                 that may result from post-harvest
                                            assess intermediate-term risk), no                      from the Codex level.                                 application techniques for pome fruit.
                                            further assessment of intermediate-term                    The Codex has an established MRL for               The established tolerances for apple,
                                            risk is necessary, and EPA relies on the                the sum of difenoconazole and its                     wet pomace was calculated based on the
                                            chronic dietary risk assessment for                     metabolite, 1-[2-chloro-4-(4-                         highest average field trial residues in or
                                            evaluating intermediate-term risk for                   chlorophenoxy)-phenyl]-2-(1,2,4-                      on apples and the average processing
                                            difenoconazole.                                         triazol)-1-yl-ethano), expressed as                   factor for wet pomace. Lastly, some
                                               5. Aggregate cancer risk for U.S.                    difenoconazole in or on milk at 0.02                  commodity terms were modified to be
                                            population. As discussed in Unit III.A,                 ppm, which is the same as the                         consistent with Agency’s preferred food
                                            the chronic dietary risk assessment is                  recommended U.S. tolerance.                           and feed commodity vocabulary.
                                            protective of any potential cancer                         The Codex has not established an
                                                                                                    MRL for difenoconazole in or on pea                   V. Conclusion
                                            effects. Based on the results of that
                                            assessment, EPA concludes that                          and bean, dried shelled, except soybean,                 Therefore, tolerances are established
                                            difenoconazole is not expected to pose                  subgroup 6C; bushberry subgroup 13–                   for residues of difenoconazole, in or on
                                            a cancer risk to humans.                                07B; pea, field, hay; pea, field, vines; or           bushberry subgroup 13–07B at 4.0 ppm;
                                               6. Determination of safety. Based on                 apple, wet pomace.                                    pea and bean, dried shelled, except
                                            these risk assessments, EPA concludes                      The Codex has an established MRL for               soybean, subgroup 6C at 0.20 ppm; pea,
                                            that there is a reasonable certainty that               difenoconazole in or on pome fruit at                 field, hay at 40 ppm; and pea, field,
                                            no harm will result to the general                      0.5 ppm for residues incurred from                    vines at 10 ppm. Additionally, existing
                                            population, or to infants and children                  foliar uses of difenoconazole. This MRL               tolerances are modified as follows:
                                            from aggregate exposure to                              differs from the recommended U.S.                     Apple, wet pomace from 7.5 ppm to 25
                                            difenoconazole residues.                                tolerance for difenoconazole in or on                 ppm; fruit, pome, group 11–10 from 3.0
                                                                                                    fruit, pome, group 11–10 at 5.0 ppm.                  to 5.0 ppm; and milk from 0.01 to 0.02
                                            IV. Other Considerations                                The Codex MRL is not adequate to cover                ppm. Lastly, the existing chickpea
                                            A. Analytical Enforcement Methodology                   residues incurred from the proposed                   tolerance is removed as unnecessary
                                                                                                    post-harvest uses in the United States;               since it is now covered by the pea and
                                               An adequate enforcement method,                      therefore, harmonization with Codex is
                                            GC/NPD method AG–575B, is available                                                                           bean, dried shelled, except soybean,
                                                                                                    not possible at this time.                            subgroup 6C tolerance.
                                            for the determination of residues of
                                            difenoconazole per se in/on plant                       C. Response to Comments
                                                                                                                                                          VI. Statutory and Executive Order
                                            commodities. An adequate enforcement                       Several comments were received in                  Reviews
                                            method, liquid chromatography/mass                      response to the notice of filing,
                                            spectrometry/mass spectrometry (LC/                     however, all were concerned with                         This action establishes tolerances
                                            MS/MS) method REM 147.07b, is                           effects to bees and related to other                  under FFDCA section 408(d) in
                                            available for the determination of                      petitions and chemicals contained in                  response to a petition submitted to the
                                            residues of difenoconazole and CGA–                     the same notice of filing, not                        Agency. The Office of Management and
                                            205375 in livestock commodities.                        difenoconazole.                                       Budget (OMB) has exempted these types
                                            Adequate confirmatory methods are also                                                                        of actions from review under Executive
                                                                                                    D. Revisions to Petitioned-for                        Order 12866, entitled ‘‘Regulatory
                                            available.
                                               The method may be requested from:                    Tolerances                                            Planning and Review’’ (58 FR 51735,
                                            Chief, Analytical Chemistry Branch,                       The tolerance being established for                 October 4, 1993). Because this action
                                            Environmental Science Center, 701                       the bushberry subgroup 13–07B is 4.0                  has been exempted from review under
                                            Mapes Rd., Ft. Meade, MD 20755–5350;                    ppm, not 3.0 ppm as proposed. This is                 Executive Order 12866, this action is
                                            telephone number: (410) 305–2905;                       due to the independent field trial                    not subject to Executive Order 13211,
                                            email address: residuemethods@                          determination which resulted in the                   entitled ‘‘Actions Concerning
                                            epa.gov.                                                exclusion of one of the trials from the               Regulations That Significantly Affect
                                                                                                    Organization for Economic Cooperation                 Energy Supply, Distribution, or Use’’ (66
                                            B. International Residue Limits                         and Development (OECD) tolerance                      FR 28355, May 22, 2001) or Executive
                                              In making its tolerance decisions, EPA                calculation procedures. The tolerance                 Order 13045, entitled ‘‘Protection of
                                            seeks to harmonize U.S. tolerances with                 being established for the pea and bean,               Children from Environmental Health
                                            international standards whenever                        dried shelled, except soybean, subgroup               Risks and Safety Risks’’ (62 FR 19885,
                                            possible, consistent with U.S. food                     6C tolerance is being set at 0.20 ppm,                April 23, 1997). This action does not
                                            safety standards and agricultural                       not 0.2 ppm, and is based on the current              contain any information collections
                                            practices. EPA considers the                            practice of setting tolerances to 2                   subject to OMB approval under the
                                            international maximum residue limits                    significant figures. The established                  Paperwork Reduction Act (PRA) (44
                                            (MRLs) established by the Codex                         tolerance in milk is being increased                  U.S.C. 3501 et seq.), nor does it require
                                            Alimentarius Commission (Codex), as                     from 0.01 ppm to 0.02 ppm because of                  any special considerations under
                                            required by FFDCA section 408(b)(4).                    the new pea hay and vine feedstuffs                   Executive Order 12898, entitled
                                            The Codex Alimentarius is a joint                       which significantly increased the                     ‘‘Federal Actions to Address
                                            United Nations Food and Agriculture                     maximum reasonably balanced dietary                   Environmental Justice in Minority
                                            Organization/World Health                               estimate for dairy cattle. Furthermore,               Populations and Low-Income
                                            Organization food standards program,                    the Agency is establishing tolerances for             Populations’’ (59 FR 7629, February 16,
                                            and it is recognized as an international                the fruit, pome, group 11–10 and apple,               1994).
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                                            food safety standards-setting                           wet pomace (5.0 ppm and 25 ppm,                          Since tolerances and exemptions that
                                            organization in trade agreements to                     respectively) at higher levels than                   are established on the basis of a petition
                                            which the United States is a party. EPA                 requested (3.0 ppm and 7.5 ppm,                       under FFDCA section 408(d), such as
                                            may establish a tolerance that is                       respectively). The established tolerances             the tolerance in this final rule, do not
                                            different from a Codex MRL; however,                    for fruit, pome, group 11–10 take into                require the issuance of a proposed rule,
                                            FFDCA section 408(b)(4) requires that                   account maximum tolerance estimates                   the requirements of the Regulatory


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                                                                Federal Register / Vol. 80, No. 63 / Thursday, April 2, 2015 / Rules and Regulations                                             17703

                                            Flexibility Act (RFA) (5 U.S.C. 601 et                      Authority: 21 U.S.C. 321(q), 346a and 371.         ENVIRONMENTAL PROTECTION
                                            seq.), do not apply.                                                                                           AGENCY
                                               This action directly regulates growers,              ■  2. In § 180.475:
                                            food processors, food handlers, and food                ■ i. Remove ‘‘Chickpea’’ from the table                40 CFR Part 300
                                            retailers, not States or tribes, nor does               in paragraph (a)(1).
                                            this action alter the relationships or                                                                         [EPA–HQ–SFUND–2014–0620; FRL–9924–
                                                                                                       ii. Add alphabetically the entries for              66–OSWER]
                                            distribution of power and
                                                                                                    ‘‘Bushberry subgroup 13–07B’’, ‘‘Pea
                                            responsibilities established by Congress                                                                       RIN 2050–AG76
                                                                                                    and bean, dried shelled, except soybean,
                                            in the preemption provisions of FFDCA
                                            section 408(n)(4). As such, the Agency                  subgroup 6C’’, ‘‘Pea, field, hay’’, and
                                                                                                                                                           National Oil and Hazardous
                                            has determined that this action will not                ‘‘Pea, field, vines’’ to the table in                  Substances Pollution Contingency
                                            have a substantial direct effect on States              paragraph (a)(1).                                      Plan (NCP); Amending the NCP for
                                            or tribal governments, on the                           ■ iii. Revise the entries for ‘‘Apple, wet             Public Notices for Specific Superfund
                                            relationship between the national                       pomace’’ and ‘‘Fruit, pome, group 11–                  Activities
                                            government and the States or tribal                     10’’ in the table in paragraph (a)(1).
                                            governments, or on the distribution of                                                                         AGENCY:  Environmental Protection
                                                                                                    ■ iv. Revise the entry for ‘‘Milk’’ in the             Agency (EPA).
                                            power and responsibilities among the
                                                                                                    table in paragraph (a)(2).                             ACTION: Final rule.
                                            various levels of government or between
                                            the Federal Government and Indian                          The amendments read as follows:
                                            tribes. Thus, the Agency has determined                                                                        SUMMARY:    The Environmental Protection
                                                                                                    § 180.475 Difenoconazole; tolerances for               Agency (EPA or the Agency) is adding
                                            that Executive Order 13132, entitled
                                                                                                    residues.                                              language to the National Oil and
                                            ‘‘Federalism’’ (64 FR 43255, August 10,
                                            1999) and Executive Order 13175,                              (a) * * * (1) * * *                              Hazardous Substances Pollution
                                            entitled ‘‘Consultation and Coordination                                                                       Contingency Plan (NCP) to broaden the
                                            with Indian Tribal Governments’’ (65 FR                                                            Parts per   methods by which the EPA can notify
                                                                                                                 Commodity                                 the public about certain Superfund
                                            67249, November 9, 2000) do not apply                                                               million
                                            to this action. In addition, this action                                                                       activities.
                                            does not impose any enforceable duty or                                                                        DATES:         This final rule is effective on
                                            contain any unfunded mandate as                           *         *         *               *          *
                                                                                                                                                                  May 4, 2015.
                                            described under Title II of the Unfunded                Apple, wet pomace .....................         25
                                                                                                                                                                  ADDRESSES: EPA has established a
                                            Mandates Reform Act (UMRA) (2 U.S.C.                                                                                  docket for this action under Docket ID
                                            1501 et seq.).                                              *             *              *               *        *
                                                                                                    Bushberry subgroup 13–07B ......                         4.0  No. EPA–HQ–SFUND–2014–0620. All
                                               This action does not involve any
                                                                                                                                                                  documents in the docket are listed in
                                            technical standards that would require
                                                                                                        *             *              *               *        *   the www.regulations.gov index.
                                            Agency consideration of voluntary
                                                                                                    Fruit, pome, group 11–10 ...........                     5.0  Although listed in the index, some
                                            consensus standards pursuant to section
                                                                                                                                                                  information is not publicly available,
                                            12(d) of the National Technology
                                                                                                        *             *              *               *        *   e.g., Confidential Business Information
                                            Transfer and Advancement Act
                                                                                                    Pea and bean, dried shelled, ex-                              (CBI) or other information whose
                                            (NTTAA) (15 U.S.C. 272 note).
                                                                                                       cept soybean, subgroup 6C ....                        0.20 disclosure is restricted by statute.
                                            VII. Congressional Review Act                           Pea, field, hay .............................           40    Certain other material, such as
                                              Pursuant to the Congressional Review                  Pea, field, vines ..........................            10    copyrighted material, will be publicly
                                            Act (5 U.S.C. 801 et seq.), EPA will                                                                                  available only in hard copy. Publicly
                                            submit a report containing this rule and                    *             *              *               *        *   available docket materials are available
                                            other required information to the U.S.                                                                                either electronically in
                                            Senate, the U.S. House of                                  (2) * * *                                                  www.regulations.gov or in hard copy at
                                            Representatives, and the Comptroller                                                                                  the Superfund Docket (Docket ID No.
                                            General of the United States prior to                                                                      Parts  per EPA–HQ–SFUND–2014–0620). This
                                                                                                                  Commodity
                                            publication of the rule in the Federal                                                                      million   Docket Facility is open from 8:30 a.m.
                                            Register. This action is not a ‘‘major                                                                                to 4:30 p.m., Monday through Friday,
                                            rule’’ as defined by 5 U.S.C. 804(2).                                                                                 excluding legal holidays. The telephone
                                                                                                        *             *              *               *        *   number for the Reading Room is (202)
                                            List of Subjects in 40 CFR Part 180                     Milk .............................................       0.02 566–1744 and the telephone number for
                                              Environmental protection,                                                                                           the Superfund Docket is (202) 566–
                                            Administrative practice and procedure,                      *             *              *               *        *   0276. The EPA Docket Center (EPA/DC)
                                            Agricultural commodities, Pesticides                                                                                  is located at WJC West Building, Room
                                            and pests, Reporting and recordkeeping                  *      *         *         *         *                        3334, 1301 Constitution Ave. NW.,
                                                                                                    [FR Doc. 2015–07354 Filed 4–1–15; 8:45 am]
                                            requirements.                                                                                                         Washington, DC.
                                                                                                    BILLING CODE 6560–50–P
                                              Dated: March 25, 2015.                                                                                              FOR FURTHER INFORMATION CONTACT:
                                            Susan Lewis,                                                                                                             General Information: Superfund,
                                            Director, Registration Division, Office of                                                                            Toxics Release Inventory (TRI),
                                            Pesticide Programs.                                                                                                   Emergency Planning and Community
                                                                                                                                                                  Right-to-Know Act (EPCRA), Risk
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                                              Therefore, 40 CFR chapter I is
                                                                                                                                                                  Management Program (RMP) and Oil
                                            amended as follows:
                                                                                                                                                                  Information Center at (800) 424–9346 or
                                            PART 180—[AMENDED]                                                                                                    TDD (800) 553–7672 (hearing impaired).
                                                                                                                                                                  In the Washington, DC metropolitan
                                            ■ 1. The authority citation for part 180                                                                              area, call (703) 412–9810 or TDD (703)
                                            continues to read as follows:                                                                                         412–3323.


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Document Created: 2018-02-21 10:03:30
Document Modified: 2018-02-21 10:03:30
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionRules and Regulations
ActionFinal rule.
DatesThis regulation is effective April 2, 2015. Objections and requests for hearings must be received on or before June 1, 2015, and must be filed in accordance with the instructions provided in 40 CFR part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).
ContactSusan Lewis, Registration Division (7505P), Office of Pesticide Programs, Environmental Protection Agency, 1200 Pennsylvania Ave. NW., Washington, DC 20460-0001; main telephone
FR Citation80 FR 17697 
CFR AssociatedEnvironmental Protection; Administrative Practice and Procedure; Agricultural Commodities; Pesticides and Pests and Reporting and Recordkeeping Requirements

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