82_FR_50292 82 FR 50084 - Hexythiazox; Pesticide Tolerances

82 FR 50084 - Hexythiazox; Pesticide Tolerances

ENVIRONMENTAL PROTECTION AGENCY

Federal Register Volume 82, Issue 208 (October 30, 2017)

Page Range50084-50089
FR Document2017-23439

This regulation amends an existing tolerance for residues of the ovicide/miticide hexythiazox in/on hop, dried cones, by increasing the current tolerance from 2.0 parts per million (ppm) to 20 ppm. Gowan Company requested modification of this tolerance under the Federal Food, Drug, and Cosmetic Act (FFDCA).

Federal Register, Volume 82 Issue 208 (Monday, October 30, 2017)
[Federal Register Volume 82, Number 208 (Monday, October 30, 2017)]
[Rules and Regulations]
[Pages 50084-50089]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2017-23439]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 180

[EPA-HQ-OPP-2017-0155; FRL-9968-12]


Hexythiazox; Pesticide Tolerances

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: This regulation amends an existing tolerance for residues of 
the ovicide/miticide hexythiazox in/on hop, dried cones, by increasing 
the current tolerance from 2.0 parts per million (ppm) to 20 ppm. Gowan 
Company requested modification of this tolerance under the Federal 
Food, Drug, and Cosmetic Act (FFDCA).

DATES: This regulation is effective October 30, 2017. Objections and 
requests for hearings must be received

[[Page 50085]]

on or before December 29, 2017, 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-2017-0155, 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: Michael L. Goodis, P.E., Director, 
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 
Printing 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-2017-0155 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 
December 29, 2017. 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-2017-0155, 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 June 8, 2017 (82 FR 26641) (FRL-9961-
14), EPA issued a document pursuant to the Federal Food, Drug, and 
Cosmetic Act (FFDCA) section 408(d)(3), 21 U.S.C. 346a(d)(3), 
announcing the filing of a pesticide petition (PP #6F8489) by Gowan 
Company, P.O. Box 5569, Yuma, AZ 85366-5569. This petition requested 
that 40 CFR 180.448 be amended by establishing a tolerance for residues 
of hexythiazox in or on hop, dried cones at 20 ppm. This document 
referenced a summary of the petition prepared by Gowan Company, the 
registrant, which is available in the docket, http://www.regulations.gov. No comments were received in response to the 
referenced notice of filing.

III. Aggregate Risk Assessment and Determination of Safety

    Section 408(b)(2)(A)(i) of FFDCA allows EPA to establish a 
tolerance (the legal limit for a pesticide chemical residue in or on a 
food) only if EPA determines that the tolerance is ``safe.'' Section 
408(b)(2)(A)(ii) of FFDCA defines ``safe'' to mean that ``there is a 
reasonable certainty that no harm will result from aggregate exposure 
to the pesticide chemical residue, including all anticipated dietary 
exposures and all other exposures for which there is reliable 
information.'' This includes exposure through drinking water and in 
residential settings, but does not include occupational exposure. 
Section 408(b)(2)(C) of FFDCA requires EPA to give special 
consideration to exposure of infants and children to the pesticide 
chemical residue in establishing a tolerance and to ``ensure that there 
is a reasonable certainty that no harm will result to infants and 
children from aggregate exposure to the pesticide chemical residue. . . 
.''
    Consistent with 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 hexythiazox including exposure 
resulting from the tolerances established by this action. EPA's 
assessment of exposures and risks associated with hexythiazox follows.

A. Toxicological Profile

    EPA has evaluated the available toxicity data and considered its 
validity, completeness, and reliability as well as the relationship of 
the results of the studies to human risk. EPA has also considered 
available information concerning the variability of the sensitivities 
of major identifiable subgroups of consumers, including infants and 
children.
    Hexythiazox has low acute toxicity by the oral, dermal, and 
inhalation routes of exposure. It produces mild eye irritation and is 
not a skin irritant or skin sensitizer. Hexythiazox is associated with 
toxicity of the liver and

[[Page 50086]]

adrenals following subchronic and chronic exposure to dogs, rats, and 
mice, with the dog being the most sensitive species. The prenatal 
developmental studies in rabbits and rats and the two-generation 
reproduction study in rats showed no indication of increased 
susceptibility to in utero or postnatal exposure to hexythiazox. 
Reproductive toxicity was not observed. There is no concern for 
immunotoxicity or neurotoxicity following exposure to hexythiazox. The 
toxicology database for hexythiazox does not show any evidence of 
treatment-related effects on the immune system.
    Hexythiazox is classified as ``Likely to be Carcinogenic to 
Humans'' based on a treatment-related increase in benign and malignant 
liver tumors in female mice and the presence of mammary gland tumors 
(fibroadenomas) in male rats; however, the evidence as a whole was not 
strong enough to warrant the use of a linear low dose extrapolation 
model applied to the animal data (Q1*) for a quantitative 
estimation of human risk because the common liver tumors (benign and 
malignant) were only observed in high-dose female mice, and benign 
mammary gland tumors were only observed in high-dose male rats. Since 
the effects seen in the study that serves as the basis for the chronic 
reference dose (cRfD) occurred at doses substantially below the lowest 
dose that induced tumors (and there is no mutagenic concern for 
hexythiazox), the cRfD is considered protective of all chronic effects, 
including potential carcinogenicity.
    Specific information on the studies received and the nature of the 
adverse effects caused by hexythiazox as well as the no-observed-
adverse-effect-level (NOAEL) and the lowest-observed-adverse-effect-
level (LOAEL) from the toxicity studies can be found at http://www.regulations.gov within the document entitled ``Hexythiazox. Human 
Health Risk Assessment for Amended Use on Hops,'' dated September 5, 
2017, which can be found in docket ID number EPA-HQ-OPP-2017-0155.

B. Toxicological Points of Departure/Levels of Concern

    Once a pesticide's toxicological profile is determined, EPA 
identifies toxicological points of departure (POD) and levels of 
concern to use in evaluating the risk posed by human exposure to the 
pesticide. For hazards that have a threshold below which there is no 
appreciable risk, the toxicological POD is used as the basis for 
derivation of reference values for risk assessment. PODs are developed 
based on a careful analysis of the doses in each toxicological study to 
determine the dose at which no adverse effects are observed (the NOAEL) 
and the lowest dose at which adverse effects of concern are identified 
(the LOAEL). Uncertainty/safety factors are used in conjunction with 
the POD to calculate a safe exposure level--generally referred to as a 
population-adjusted dose (PAD) or a reference dose (RfD)--and a safe 
margin of exposure (MOE). For non-threshold risks, the Agency assumes 
that any amount of exposure will lead to some degree of risk. Thus, the 
Agency estimates risk in terms of the probability of an occurrence of 
the adverse effect expected in a lifetime. For more information on the 
general principles EPA uses in risk characterization and a complete 
description of the risk assessment process, see http://www.epa.gov/pesticides/factsheets/riskassess.htm. A summary of the toxicological 
endpoints for hexythiazox used for human risk assessment is shown in 
the Table of this unit.

   Table--Summary of Toxicological Doses and Endpoints for Hexythiazox for Use in Human Health Risk Assessment
----------------------------------------------------------------------------------------------------------------
                                    Point of departure
        Exposure/scenario            and uncertainty/     RfD, PAD, LOC for     Study and toxicological effects
                                      safety factors       risk assessment
----------------------------------------------------------------------------------------------------------------
Acute Dietary (All populations)..  No risk is expected from this exposure scenario as no hazard was identified
                                    in any toxicity study for this duration of exposure.
----------------------------------------------------------------------------------------------------------------
Chronic Dietary (All populations)  NOAEL= 2.5 mg/kg/day  Chronic RfD = 0.025  One-Year Feeding Toxicity Study--
                                   UFA = 10x...........   mg/kg/day.           Dogs.
                                   UFH = 10x...........  cPAD = 0.025.......  LOAEL = 12.5 mg/kg/day based on
                                   FQPA SF = 1x........                        increased absolute and relative
                                                                               adrenal weights, and associated
                                                                               adrenal histopathology.
Incidental Oral Short-Term (1 to   NOAEL= 30 mg/kg/day.  Residential LOC for  2-Generation Reproduction Study--
 30 days) and Intermediate-Term    UFA = 10x...........   MOE = 100.           Rat.
 (1 to 6 months).                  UFH = 10x...........                       LOAEL = 180 mg/kg/day, based on
                                   FQPA SF = 1x........                        decreased pup body weight during
                                                                               lactation and delayed hair growth
                                                                               and/or eye opening, and decreased
                                                                               parental body-weight gain and
                                                                               increased absolute and relative
                                                                               liver, kidney, and adrenal
                                                                               weights.
----------------------------------------------------------------------------------------------------------------
Dermal Short- and Intermediate-    A quantitative dermal risk assessment is not necessary since no dermal hazard
 term.                              is anticipated. There is no evidence of increased quantitative or
                                    qualitative susceptibility of the young following in utero and pre-and post-
                                    natal exposure to hexythiazox.
----------------------------------------------------------------------------------------------------------------
Inhalation Short-Term (1 to 30     Oral NOAEL= 30 mg/kg/ Residential LOC for  2-Generation Reproduction Study--
 days) and Intermediate-Term (1     day.                  MOE = 100.           Rat.
 to 6 months).                     UFA = 10x...........                       LOAEL = 180 mg/kg/day, based on
                                   UFH = 10x...........                        decreased pup body weight during
                                   FQPA SF = 1x........                        lactation and delayed hair growth
                                                                               and/or eye opening, and decreased
                                                                               parental body-weight gain and
                                                                               increased absolute and relative
                                                                               liver, kidney, and adrenal
                                                                               weights.
----------------------------------------------------------------------------------------------------------------

[[Page 50087]]

 
Cancer (oral, dermal, and          Classification: ``Likely to be Carcinogenic to Humans.'' A quantification of
 inhalation).                       risk using a non-linear approach; i.e., RfD, for hexythiazox will adequately
                                    account for all chronic toxicity, including carcinogenicity, that could
                                    result from exposure to hexythiazox.
----------------------------------------------------------------------------------------------------------------
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 hexythiazox, EPA considered exposure under the petitioned-
for tolerances as well as all existing hexythiazox tolerances in 40 CFR 
180.448. EPA assessed dietary exposures from hexythiazox in food as 
follows:
    i. Acute exposure. Quantitative acute dietary exposure and risk 
assessments are performed for a food-use pesticide, if a toxicological 
study has indicated the possibility of an effect of concern occurring 
as a result of a 1-day or single exposure. No toxic effects 
attributable to a single dose of hexythiazox were observed in the 
toxicology database; therefore, a quantitative acute dietary exposure 
and risk assessment is unnecessary.
    ii. Chronic exposure. In conducting the chronic dietary (food and 
drinking water) exposure assessment, EPA used the Dietary Exposure 
Evaluation Model (DEEM-FCID), Version 3.16, which uses food consumption 
data from the U.S. Department of Agriculture's National Health and 
Nutrition Examination Survey, What We Eat in America (NHANES/WWEIA) 
from 2003-2008. As to residue levels in food, EPA used tolerance-level 
residues, assumed 100 percent crop treated (PCT), and incorporated DEEM 
7.81 default processing factors when processing data were not 
available.
    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 hexythiazox. Cancer risk was assessed using the same 
exposure estimates as discussed in Unit III.C.1.ii., Chronic exposure.
    iv. Anticipated residue and percent crop treated (PCT) information. 
EPA did not use anticipated residue and/or PCT information in the 
dietary assessment for hexythiazox. Tolerance-level residues and/or 100 
PCT were assumed for all food commodities.
    2. Dietary exposure from drinking water. The Agency used screening-
level water exposure models in the dietary exposure analysis and risk 
assessment for hexythiazox in drinking water. These simulation models 
take into account data on the physical, chemical, and fate/transport 
characteristics of hexythiazox. Further information regarding EPA 
drinking water models used in pesticide exposure assessment can be 
found at http://www.epa.gov/oppefed1/models/water/index.htm.
    Surface water and groundwater estimated drinking water 
concentrations (EDWCs) do not result in any change to the existing 
EDWCs determined from a recent drinking water assessment derived on 
hops. Specifically, since hops is already a registered use that was 
recently assessed during registration review, no new drinking water 
scenarios were identified with this proposed increase in application 
rates that would require a new drinking water assessment to be 
conducted. In fact, the highest EDWCs associated with all uses of 
hexythiazox continue to be from use on sorghum in the Western U.S., 
using the Pesticide Root Zone Model (PRZM) surface water modeling 
scenario. Furthermore, based on the Agency's previous assessment, the 
EDWCs of hexythiazox for chronic exposures are estimated to be 4.3 
parts per billion (ppb) for surface water and 2.4 ppb for ground water 
(DP 433290, 5/9/2016; DP 404023, 1/17/2012), and the higher of these 
values was used in the dietary exposure model to assess chronic dietary 
risk.
    3. From non-dietary exposure. The term ``residential exposure'' is 
used in this document to refer to non-occupational, non-dietary 
exposure (e.g., for lawn and garden pest control, indoor pest control, 
termiticides, and flea and tick control on pets). Hexythiazox is 
currently registered for the following residential uses, including 
ornamental landscape plantings, turf, and fruit and nut trees in 
residential sites.
    EPA assessed residential exposure using the following assumptions: 
Residential handler exposures are expected to be short-term (1 to 30 
days) via either the dermal or inhalation routes of exposures. Since a 
quantitative dermal risk assessment is not needed for hexythiazox, 
handler MOEs were calculated for the inhalation route of exposure only. 
EPA uses the term ``post-application'' to describe exposure to 
individuals that occur as a result of being in an environment that has 
been previously treated with a pesticide. There is potential for post-
application for individuals exposed as a result of being in an 
environment that has been previously treated with hexythiazox. Adult 
residential post-application dermal exposures were not assessed since 
no dermal hazard was identified for hexythiazox. The residential post-
application exposure assessment for children included incidental oral 
exposure resulting from transfer of residues from the hand-to-mouth, 
object to- mouth, and from incidental ingestion of soil.
    Further information regarding EPA standard assumptions and generic 
inputs for residential exposures may be found at http://www.epa.gov/pesticides/science/residential-exposure-sop.html.
    4. Cumulative effects from substances with a common mechanism of 
toxicity. Section 408(b)(2)(D)(v) of FFDCA requires that, when 
considering whether to establish, modify, or revoke a tolerance, the 
Agency consider ``available information'' concerning the cumulative 
effects of a particular pesticide's residues and ``other substances 
that have a common mechanism of toxicity.''
    EPA has not found hexythiazox to share a common mechanism of 
toxicity with any other substances, and hexythiazox does not appear to 
produce a toxic metabolite produced by other substances. For the 
purposes of this tolerance action; therefore, EPA has assumed that 
hexythiazox does not have a common mechanism of toxicity with other 
substances. For information

[[Page 50088]]

regarding EPA's efforts to determine which chemicals have a common 
mechanism of toxicity and to evaluate the cumulative effects of such 
chemicals, see EPA's Web site at http://www.epa.gov/pesticides/cumulative.

D. Safety Factor for Infants and Children

    1. In general. Section 408(b)(2)(C) of FFDCA provides that EPA 
shall apply an additional tenfold (10X) margin of safety for infants 
and children in the case of threshold effects to account for prenatal 
and postnatal toxicity and the completeness of the database on toxicity 
and exposure unless EPA determines based on reliable data that a 
different margin of safety will be safe for infants and children. This 
additional margin of safety is commonly referred to as the Food Quality 
Protection Act Safety Factor (FQPA SF). In applying this provision, EPA 
either retains the default value of 10X, or uses a different additional 
safety factor when reliable data available to EPA support the choice of 
a different factor.
    2. Prenatal and postnatal sensitivity. The prenatal and postnatal 
toxicology data base indicates no increased susceptibility of rats or 
rabbits to in utero and/or postnatal exposure to hexythiazox.
    3. Conclusion. EPA has determined that reliable data show the 
safety of infants and children would be adequately protected if the 
FQPA SF were reduced to 1x. That decision is based on the following 
findings:
    i. The toxicity database for hexythiazox is complete.
    ii. There is no indication that hexythiazox is a neurotoxic 
chemical and there is no need for a developmental neurotoxicity study 
or additional UFs to account for neurotoxicity.
    iii. There is no evidence that hexythiazox results in increased 
susceptibility in in utero rats or rabbits in the prenatal 
developmental studies or in young rats in the 2-generation reproduction 
study.
    iv. There are no residual uncertainties identified in the exposure 
databases. EPA made conservative (protective) assumptions in the ground 
and surface water modeling used to assess exposure to hexythiazox in 
drinking water. EPA used similarly conservative assumptions to assess 
post-application exposure of children as well as incidental oral 
exposure of toddlers. These assessments will not underestimate the 
exposure and risks posed by hexythiazox.

E. Aggregate Risks and Determination of Safety

    EPA determines whether acute and chronic dietary pesticide 
exposures are safe by comparing aggregate exposure estimates to the 
acute PAD (aPAD) and chronic PAD (cPAD). For linear cancer risks, EPA 
calculates the lifetime probability of acquiring cancer given the 
estimated aggregate exposure. Short-, 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. An acute aggregate risk assessment takes into 
account acute exposure estimates from dietary consumption of food and 
drinking water. No toxic effects attributable to a single dose of 
hexythiazox were observed in the toxicology database; therefore, a 
quantitative acute aggregate risk assessment for hexythiazox is not 
required.
    2. Chronic risk. Using the exposure assumptions described in this 
unit for chronic exposure, EPA has concluded that chronic exposure to 
hexythiazox from food and water will utilize 93% of the cPAD for 
children 1-2 years of age, the population group receiving the greatest 
exposure. Based on the explanation in Unit III.C.3., regarding 
residential use patterns, chronic residential exposure to residues of 
hexythiazox is not expected.
    3. Short-term risk. Short-term aggregate exposure takes into 
account short-term residential exposure plus chronic exposure to food 
and water (considered to be a background exposure level).
    Hexythiazox 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 hexythiazox. Using the 
exposure assumptions described in this unit for short-term exposures, 
EPA has concluded the combined short-term food, drinking water, and 
residential inhalation exposures result in an aggregate MOE for adults 
(7,500) that greatly exceeds the LOC of 100, and is 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).
    Hexythiazox is currently registered for uses that could result in 
intermediate-term residential exposure, and the Agency has determined 
that it is appropriate to aggregate chronic exposure through food and 
water with intermediate-term residential exposures to hexythiazox. 
Using the exposure assumptions described in this unit for intermediate-
term exposures, EPA has concluded the combined intermediate-term food, 
drinking water, and residential oral exposures result in an aggregate 
MOE for children (1,150) that greatly exceeds the LOC of 100, and is 
not of concern.
    5. Aggregate cancer risk for U.S. population. As discussed in Unit 
III. C.1.iii., EPA concluded that regulation based on the cRfD will be 
protective for both chronic and carcinogenic risks. As noted in this 
unit, there are no chronic risks of concern; therefore, the Agency 
concludes that aggregate exposure to hexythiazox will not pose a cancer 
risk.
    6. Determination of safety. Based on these risk assessments, EPA 
concludes that there is a reasonable certainty that no harm will result 
to the U.S. general population, or to infants and children from 
aggregate exposure to hexythiazox residues.

IV. Other Considerations

A. Analytical Enforcement Methodology

    An adequate High performance liquid chromatography using ultra-
violet detection (HPLC/UV) analytical method is available for the 
enforcement of tolerances for residues of hexythiazox and its 
metabolites containing the PT-1-3 moiety in crop and livestock 
commodities. This method is listed in the U.S. EPA Index of Residue 
Analytical Methods under hexythiazox as method AMR-985-87. The limit of 
quantification (LOQ) for hexythiazox residues is 0.02 ppm.

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 Federal 
Food, Drug and Cosmetic Act (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,

[[Page 50089]]

FFDCA section 408(b)(4) requires that EPA explain the reasons for 
departing from the Codex level.
    Codex has established an MRL for residues of hexythiazox on hops at 
3 ppm. The U.S. tolerance for residues of hexythiazox on hops cannot be 
harmonized based on approved label instructions. Based on available 
residue data, compliance with label instructions would result in 
exceedances of a tolerance harmonized with the Codex MRL.

V. Conclusion

    Therefore, the existing tolerance for residues of the ovicide/
miticide hexythiazox and its metabolites containing the (4-
chlorophenyl)-4-methyl-2-oxo-3-thiazolidine moiety in/on hop, dried 
cones is increased from 2.0 ppm to 20 ppm.

VI. Statutory and Executive Order Reviews

    This action amends an existing tolerance 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 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: October 6, 2017.
Daniel J. Rosenblatt,
Acting 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. Section 180.448 is amended by revising the entry ``Hop, dried 
cones'' in the table in paragraph (a) to read as follows:


Sec.  180.448   Hexythiazox; tolerances for residues.

    (a) * * *

------------------------------------------------------------------------
                                                               Parts per
                          Commodity                             million
------------------------------------------------------------------------
 
                                * * * * *
Hop, dried cones............................................          20
 
                                * * * * *
------------------------------------------------------------------------

* * * * *
[FR Doc. 2017-23439 Filed 10-27-17; 8:45 am]
BILLING CODE 6560-50-P



                                             50084            Federal Register / Vol. 82, No. 208 / Monday, October 30, 2017 / Rules and Regulations

                                             B. Impact on Small Entities                             between the national government and                   coordinate protest activities so that your
                                                The Regulatory Flexibility Act of 1980               the States, or on the distribution of                 message can be received without
                                             (RFA), 5 U.S.C. 601–612, as amended,                    power and responsibilities among the                  jeopardizing the safety or security of
                                             requires federal agencies to consider the               various levels of government. We have                 people, places or vessels.
                                             potential impact of regulations on small                analyzed this rule under that Order and
                                                                                                     have determined that it is consistent                 List of Subjects in 33 CFR Part 117
                                             entities during rulemaking. The term
                                                                                                     with the fundamental federalism                         Bridges.
                                             ‘‘small entities’’ comprises small
                                                                                                     principles and preemption requirements                  For the reasons discussed in the
                                             businesses, not-for-profit organizations
                                                                                                     described in Executive Order 13132.                   preamble, the Coast Guard amends 33
                                             that are independently owned and                           Also, this rule does not have tribal
                                             operated and are not dominant in their                                                                        CFR part 117 as follows:
                                                                                                     implications under Executive Order
                                             fields, and governmental jurisdictions                  13175, Consultation and Coordination                  PART 117—DRAWBRIDGE
                                             with populations of less than 50,000.                   with Indian Tribal Governments,                       OPERATION REGULATIONS
                                             The Coast Guard received zero                           because it does not have a substantial
                                             comments from the Small Business                        direct effect on one or more Indian                   ■ 1. The authority citation for part 117
                                             Administration on this rule. The Coast                  tribes, on the relationship between the               continues to read as follows:
                                             Guard certifies under 5 U.S.C. 605(b)                   Federal Government and Indian tribes,                   Authority: 33 U.S.C. 499; 33 CFR 1.05–1;
                                             that this rule will not have a significant              or on the distribution of power and                   Department of Homeland Security Delegation
                                             economic impact on a substantial                        responsibilities between the Federal                  No. 0170.1.
                                             number of small entities. While some                    Government and Indian tribes. We
                                             owners or operators of vessels intending                                                                      ■ 2. Revise § 117.243(b) to read as
                                                                                                     received zero comments on this rule.                  follows:
                                             to transit the bridge may be small
                                             entities, for the reasons stated in section             E. Unfunded Mandates Reform Act                       § 117.243   Nanticoke River.
                                             V.A above, this rule will not have a                      The Unfunded Mandates Reform Act                    *      *     *     *    *
                                             significant economic impact on any                      of 1995 (2 U.S.C. 1531–1538) requires                    (b) The draw of the SR 13 Bridge, mile
                                             vessel owner or operator.                               Federal agencies to assess the effects of             39.6, in Seaford shall:
                                                Under section 213(a) of the Small                    their discretionary regulatory actions. In               (1) Open on signal, except from 6 p.m.
                                             Business Regulatory Enforcement                         particular, the Act addresses actions                 to 8 a.m., from April 1 through October
                                             Fairness Act of 1996 (Pub. L. 104–121),                 that may result in the expenditure by a               31; from November 1 through March 31,
                                             we want to assist small entities in                     State, local, or tribal government, in the            Monday to Friday and on Saturday and
                                             understanding this rule. If the rule                    aggregate, or by the private sector of                Sunday from 3:30 p.m. to 7:30 a.m., if
                                             would affect your small business,                       $100,000,000 (adjusted for inflation) or              at least four hours notice is given.
                                             organization, or governmental                           more in any one year. Though this                        (2) Open on signal, on Saturday and
                                             jurisdiction and you have questions                     proposed rule will not result in such an              Sunday, from 7:31 a.m. through 3:29
                                             concerning its provisions or options for                expenditure, we do discuss the effects of             p.m., from November 1 through March
                                             compliance, please contact the person                   this proposed rule elsewhere in this                  31, if at least 24 hours notice is given.
                                             listed in the FOR FURTHER INFORMATION                   preamble. We received zero comments
                                             CONTACT, above.                                                                                                 Dated: October 10, 2017.
                                                                                                     on this rule.
                                                Small businesses may send comments                                                                         M.L. Austin,
                                             on the actions of Federal employees                     F. Environment                                        Rear Admiral, U.S. Coast Guard, Commander,
                                             who enforce, or otherwise determine                        We have analyzed this rule under                   Fifth Coast Guard District.
                                             compliance with, Federal regulations to                 Department of Homeland Security                       [FR Doc. 2017–23559 Filed 10–27–17; 8:45 am]
                                             the Small Business and Agriculture                      Management Directive 023–01 and                       BILLING CODE 9110–04–P
                                             Regulatory Enforcement Ombudsman                        Commandant Instruction M16475.lD,
                                             and the Regional Small Business                         which guides the Coast Guard in
                                             Regulatory Fairness Boards. The                         complying with the National                           ENVIRONMENTAL PROTECTION
                                             Ombudsman evaluates these actions                       Environmental Policy Act of 1969                      AGENCY
                                             annually and rates each agency’s                        (NEPA) (42 U.S.C. 4321–4370f), and
                                             responsiveness to small business. If you                have made a determination that this                   40 CFR Part 180
                                             wish to comment on actions by                           action is one of a category of actions                [EPA–HQ–OPP–2017–0155; FRL–9968–12]
                                             employees of the Coast Guard, call 1–                   which do not individually or
                                             888–REG–FAIR (1–888–734–3247). The                      cumulatively have a significant effect on             Hexythiazox; Pesticide Tolerances
                                             Coast Guard will not retaliate against                  the human environment. This rule
                                             small entities that question or complain                simply promulgates the operating                      AGENCY:  Environmental Protection
                                             about this rule or any policy or action                 regulations or procedures for                         Agency (EPA).
                                             of the Coast Guard.                                     drawbridges. This action is categorically             ACTION: Final rule.
                                                                                                     excluded from further review, under
                                             C. Collection of Information                                                                                  SUMMARY:   This regulation amends an
                                                                                                     figure 2–1, paragraph (32)(e), of the
                                               This rule calls for no new collection                 Instruction. A preliminary Record of                  existing tolerance for residues of the
                                             of information under the Paperwork                      Environmental Consideration and a                     ovicide/miticide hexythiazox in/on hop,
                                             Reduction Act of 1995 (44 U.S.C. 3501–                  Memorandum for the Record are not                     dried cones, by increasing the current
                                             3520).                                                  required for this rule.                               tolerance from 2.0 parts per million
                                                                                                                                                           (ppm) to 20 ppm. Gowan Company
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                                             D. Federalism and Indian Tribal                         G. Protest Activities                                 requested modification of this tolerance
                                             Government                                                The Coast Guard respects the First                  under the Federal Food, Drug, and
                                                A rule has implications for federalism               Amendment rights of protesters.                       Cosmetic Act (FFDCA).
                                             under Executive Order 13132,                            Protesters are asked to contact the                   DATES: This regulation is effective
                                             Federalism, if it has a substantial direct              person listed in the FOR FURTHER                      October 30, 2017. Objections and
                                             effect on the States, on the relationship               INFORMATION CONTACT section to                        requests for hearings must be received


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                                                              Federal Register / Vol. 82, No. 208 / Monday, October 30, 2017 / Rules and Regulations                                         50085

                                             on or before December 29, 2017, and                     C. How can I file an objection or hearing             that 40 CFR 180.448 be amended by
                                             must be filed in accordance with the                    request?                                              establishing a tolerance for residues of
                                             instructions provided in 40 CFR part                      Under FFDCA section 408(g), 21                      hexythiazox in or on hop, dried cones
                                             178 (see also Unit I.C. of the                          U.S.C. 346a, any person may file an                   at 20 ppm. This document referenced a
                                             SUPPLEMENTARY INFORMATION).
                                                                                                     objection to any aspect of this regulation            summary of the petition prepared by
                                             ADDRESSES: The docket for this action,                  and may also request a hearing on those               Gowan Company, the registrant, which
                                             identified by docket identification (ID)                objections. You must file your objection              is available in the docket, http://
                                             number EPA–HQ–OPP–2017–0155, is                                                                               www.regulations.gov. No comments
                                                                                                     or request a hearing on this regulation
                                             available at http://www.regulations.gov                                                                       were received in response to the
                                                                                                     in accordance with the instructions
                                             or at the Office of Pesticide Programs                                                                        referenced notice of filing.
                                                                                                     provided in 40 CFR part 178. To ensure
                                             Regulatory Public Docket (OPP Docket)                   proper receipt by EPA, you must                       III. Aggregate Risk Assessment and
                                             in the Environmental Protection Agency                  identify docket ID number EPA–HQ–                     Determination of Safety
                                             Docket Center (EPA/DC), West William                    OPP–2017–0155 in the subject line on                     Section 408(b)(2)(A)(i) of FFDCA
                                             Jefferson Clinton Bldg., Rm. 3334, 1301                 the first page of your submission. All                allows EPA to establish a tolerance (the
                                             Constitution Ave. NW., Washington, DC                   objections and requests for a hearing                 legal limit for a pesticide chemical
                                             20460–0001.The Public Reading Room                      must be in writing, and must be                       residue in or on a food) only if EPA
                                             is open from 8:30 a.m. to 4:30 p.m.,                    received by the Hearing Clerk on or                   determines that the tolerance is ‘‘safe.’’
                                             Monday through Friday, excluding legal                  before December 29, 2017. Addresses for               Section 408(b)(2)(A)(ii) of FFDCA
                                             holidays. The telephone number for the                  mail and hand delivery of objections                  defines ‘‘safe’’ to mean that ‘‘there is a
                                             Public Reading Room is (202) 566–1744,                  and hearing requests are provided in 40               reasonable certainty that no harm will
                                             and the telephone number for the OPP                    CFR 178.25(b).                                        result from aggregate exposure to the
                                             Docket is (703) 305–5805. Please review                   In addition to filing an objection or               pesticide chemical residue, including
                                             the visitor instructions and additional                 hearing request with the Hearing Clerk                all anticipated dietary exposures and all
                                             information about the docket available                  as described in 40 CFR part 178, please               other exposures for which there is
                                             at http://www.epa.gov/dockets.                          submit a copy of the filing (excluding                reliable information.’’ This includes
                                             FOR FURTHER INFORMATION CONTACT:
                                                                                                     any Confidential Business Information                 exposure through drinking water and in
                                             Michael L. Goodis, P.E., Director,                      (CBI)) for inclusion in the public docket.            residential settings, but does not include
                                             Registration Division (7505P), Office of                Information not marked confidential                   occupational exposure. Section
                                             Pesticide Programs, Environmental                       pursuant to 40 CFR part 2 may be                      408(b)(2)(C) of FFDCA requires EPA to
                                             Protection Agency, 1200 Pennsylvania                    disclosed publicly by EPA without prior               give special consideration to exposure
                                             Ave. NW., Washington, DC 20460–0001;                    notice. Submit the non-CBI copy of your               of infants and children to the pesticide
                                             main telephone number: (703) 305–                       objection or hearing request, identified              chemical residue in establishing a
                                             7090; email address: RDFRNotices@                       by docket ID number EPA–HQ–OPP–                       tolerance and to ‘‘ensure that there is a
                                             epa.gov.                                                2017–0155, by one of the following                    reasonable certainty that no harm will
                                                                                                     methods:                                              result to infants and children from
                                             SUPPLEMENTARY INFORMATION:                                • Federal eRulemaking Portal: http://               aggregate exposure to the pesticide
                                                                                                     www.regulations.gov. Follow the online                chemical residue. . . .’’
                                             I. General Information
                                                                                                     instructions for submitting comments.                    Consistent with FFDCA section
                                             A. Does this action apply to me?                        Do not submit electronically any                      408(b)(2)(D), and the factors specified in
                                                                                                     information you consider to be CBI or                 FFDCA section 408(b)(2)(D), EPA has
                                                You may be potentially affected by
                                                                                                     other information whose disclosure is                 reviewed the available scientific data
                                             this action if you are an agricultural
                                                                                                     restricted by statute.                                and other relevant information in
                                             producer, food manufacturer, or
                                                                                                       • Mail: OPP Docket, Environmental                   support of this action. EPA has
                                             pesticide manufacturer. The following
                                                                                                     Protection Agency Docket Center (EPA/                 sufficient data to assess the hazards of
                                             list of North American Industrial
                                                                                                     DC), (28221T), 1200 Pennsylvania Ave.                 and to make a determination on
                                             Classification System (NAICS) codes is
                                                                                                     NW., Washington, DC 20460–0001.                       aggregate exposure for hexythiazox
                                             not intended to be exhaustive, but rather
                                                                                                       • Hand Delivery: To make special                    including exposure resulting from the
                                             provides a guide to help readers
                                                                                                     arrangements for hand delivery or                     tolerances established by this action.
                                             determine whether this document
                                                                                                     delivery of boxed information, please                 EPA’s assessment of exposures and risks
                                             applies to them. Potentially affected
                                                                                                     follow the instructions at http://                    associated with hexythiazox follows.
                                             entities may include:
                                                                                                     www.epa.gov/dockets/contacts.html.
                                                • Crop production (NAICS code 111).                    Additional instructions on                          A. Toxicological Profile
                                                • Animal production (NAICS code                      commenting or visiting the docket,                       EPA has evaluated the available
                                             112).                                                   along with more information about                     toxicity data and considered its validity,
                                                • Food manufacturing (NAICS code                     dockets generally, is available at http://            completeness, and reliability as well as
                                             311).                                                   www.epa.gov/dockets.                                  the relationship of the results of the
                                                • Pesticide manufacturing (NAICS                                                                           studies to human risk. EPA has also
                                             code 32532).                                            II. Summary of Petitioned-For
                                                                                                                                                           considered available information
                                                                                                     Tolerance
                                             B. How can I get electronic access to                                                                         concerning the variability of the
                                                                                                        In the Federal Register of June 8, 2017            sensitivities of major identifiable
                                             other related information?
                                                                                                     (82 FR 26641) (FRL–9961–14), EPA                      subgroups of consumers, including
                                                You may access a frequently updated                  issued a document pursuant to the
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                                                                                                                                                           infants and children.
                                             electronic version of EPA’s tolerance                   Federal Food, Drug, and Cosmetic Act                     Hexythiazox has low acute toxicity by
                                             regulations at 40 CFR part 180 through                  (FFDCA) section 408(d)(3), 21 U.S.C.                  the oral, dermal, and inhalation routes
                                             the Government Printing Office’s e-CFR                  346a(d)(3), announcing the filing of a                of exposure. It produces mild eye
                                             site at http://www.ecfr.gov/cgi-bin/text-               pesticide petition (PP #6F8489) by                    irritation and is not a skin irritant or
                                             idx?&c=ecfr&tpl=/ecfrbrowse/Title40/                    Gowan Company, P.O. Box 5569, Yuma,                   skin sensitizer. Hexythiazox is
                                             40tab_02.tpl.                                           AZ 85366–5569. This petition requested                associated with toxicity of the liver and


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                                             50086            Federal Register / Vol. 82, No. 208 / Monday, October 30, 2017 / Rules and Regulations

                                             adrenals following subchronic and                       only observed in high-dose male rats.                 that have a threshold below which there
                                             chronic exposure to dogs, rats, and                     Since the effects seen in the study that              is no appreciable risk, the toxicological
                                             mice, with the dog being the most                       serves as the basis for the chronic                   POD is used as the basis for derivation
                                             sensitive species. The prenatal                         reference dose (cRfD) occurred at doses               of reference values for risk assessment.
                                             developmental studies in rabbits and                    substantially below the lowest dose that              PODs are developed based on a careful
                                             rats and the two-generation                             induced tumors (and there is no                       analysis of the doses in each
                                             reproduction study in rats showed no                    mutagenic concern for hexythiazox), the               toxicological study to determine the
                                             indication of increased susceptibility to               cRfD is considered protective of all                  dose at which no adverse effects are
                                             in utero or postnatal exposure to                       chronic effects, including potential                  observed (the NOAEL) and the lowest
                                             hexythiazox. Reproductive toxicity was                  carcinogenicity.                                      dose at which adverse effects of concern
                                             not observed. There is no concern for                      Specific information on the studies                are identified (the LOAEL). Uncertainty/
                                             immunotoxicity or neurotoxicity                         received and the nature of the adverse                safety factors are used in conjunction
                                             following exposure to hexythiazox. The                  effects caused by hexythiazox as well as              with the POD to calculate a safe
                                             toxicology database for hexythiazox                     the no-observed-adverse-effect-level
                                                                                                                                                           exposure level—generally referred to as
                                             does not show any evidence of                           (NOAEL) and the lowest-observed-
                                                                                                                                                           a population-adjusted dose (PAD) or a
                                             treatment-related effects on the immune                 adverse-effect-level (LOAEL) from the
                                                                                                                                                           reference dose (RfD)—and a safe margin
                                             system.                                                 toxicity studies can be found at http://
                                                                                                     www.regulations.gov within the                        of exposure (MOE). For non-threshold
                                                Hexythiazox is classified as ‘‘Likely to             document entitled ‘‘Hexythiazox.                      risks, the Agency assumes that any
                                             be Carcinogenic to Humans’’ based on a                  Human Health Risk Assessment for                      amount of exposure will lead to some
                                             treatment-related increase in benign and                Amended Use on Hops,’’ dated                          degree of risk. Thus, the Agency
                                             malignant liver tumors in female mice                   September 5, 2017, which can be found                 estimates risk in terms of the probability
                                             and the presence of mammary gland                       in docket ID number EPA–HQ–OPP–                       of an occurrence of the adverse effect
                                             tumors (fibroadenomas) in male rats;                    2017–0155.                                            expected in a lifetime. For more
                                             however, the evidence as a whole was                                                                          information on the general principles
                                             not strong enough to warrant the use of                 B. Toxicological Points of Departure/                 EPA uses in risk characterization and a
                                             a linear low dose extrapolation model                   Levels of Concern                                     complete description of the risk
                                             applied to the animal data (Q1*) for a                    Once a pesticide’s toxicological                    assessment process, see http://
                                             quantitative estimation of human risk                   profile is determined, EPA identifies                 www.epa.gov/pesticides/factsheets/
                                             because the common liver tumors                         toxicological points of departure (POD)               riskassess.htm. A summary of the
                                             (benign and malignant) were only                        and levels of concern to use in                       toxicological endpoints for hexythiazox
                                             observed in high-dose female mice, and                  evaluating the risk posed by human                    used for human risk assessment is
                                             benign mammary gland tumors were                        exposure to the pesticide. For hazards                shown in the Table of this unit.

                                                 TABLE—SUMMARY OF TOXICOLOGICAL DOSES AND ENDPOINTS FOR HEXYTHIAZOX 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)        No risk is expected from this exposure scenario as no hazard was identified in any toxicity study for this dura-
                                                                                    tion of exposure.

                                             Chronic Dietary (All popu-             NOAEL= 2.5 mg/kg/          Chronic RfD = 0.025        One-Year Feeding Toxicity Study—Dogs.
                                               lations).                             day.                        mg/kg/day.               LOAEL = 12.5 mg/kg/day based on increased absolute and rel-
                                                                                    UFA = 10x                  cPAD = 0.025                 ative    adrenal weights,    and    associated   adrenal
                                                                                    UFH = 10x                                               histopathology.
                                                                                    FQPA SF = 1x
                                             Incidental Oral Short-Term (1 to       NOAEL= 30 mg/kg/           Residential LOC for        2-Generation Reproduction Study—Rat.
                                               30 days) and Intermediate-            day.                        MOE = 100.               LOAEL = 180 mg/kg/day, based on decreased pup body
                                               Term (1 to 6 months).                UFA = 10x                                               weight during lactation and delayed hair growth and/or eye
                                                                                    UFH = 10x                                               opening, and decreased parental body-weight gain and in-
                                                                                    FQPA SF = 1x                                            creased absolute and relative liver, kidney, and adrenal
                                                                                                                                            weights.

                                             Dermal Short- and Inter-               A quantitative dermal risk assessment is not necessary since no dermal hazard is anticipated. There is no evi-
                                               mediate-term.                        dence of increased quantitative or qualitative susceptibility of the young following in utero and pre-and post-
                                                                                    natal exposure to hexythiazox.

                                             Inhalation Short-Term (1 to 30         Oral NOAEL= 30             Residential LOC for        2-Generation Reproduction Study—Rat.
                                               days) and Intermediate-Term            mg/kg/day.                 MOE = 100.               LOAEL = 180 mg/kg/day, based on decreased pup body
                                               (1 to 6 months).                     UFA = 10x                                               weight during lactation and delayed hair growth and/or eye
                                                                                    UFH = 10x                                               opening, and decreased parental body-weight gain and in-
                                                                                    FQPA SF = 1x                                            creased absolute and relative liver, kidney, and adrenal
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                                                                                                                                            weights.




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                                                              Federal Register / Vol. 82, No. 208 / Monday, October 30, 2017 / Rules and Regulations                                           50087

                                                 TABLE—SUMMARY OF TOXICOLOGICAL DOSES AND ENDPOINTS FOR HEXYTHIAZOX FOR USE IN HUMAN HEALTH RISK
                                                                                    ASSESSMENT—Continued
                                                                                      Point of departure        RfD, PAD, LOC for
                                                    Exposure/scenario                  and uncertainty/                                                    Study and toxicological effects
                                                                                                                 risk assessment
                                                                                        safety factors

                                             Cancer (oral, dermal, and inha-        Classification: ‘‘Likely to be Carcinogenic to Humans.’’ A quantification of risk using a non-linear approach; i.e.,
                                               lation).                             RfD, for hexythiazox will adequately account for all chronic toxicity, including carcinogenicity, that could result
                                                                                    from exposure to hexythiazox.
                                               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                                     2. Dietary exposure from drinking                     EPA assessed residential exposure
                                                1. Dietary exposure from food and                    water. The Agency used screening-level                using the following assumptions:
                                             feed uses. In evaluating dietary                        water exposure models in the dietary                  Residential handler exposures are
                                             exposure to hexythiazox, EPA                            exposure analysis and risk assessment                 expected to be short-term (1 to 30 days)
                                             considered exposure under the                           for hexythiazox in drinking water.                    via either the dermal or inhalation
                                                                                                     These simulation models take into                     routes of exposures. Since a quantitative
                                             petitioned-for tolerances as well as all
                                                                                                     account data on the physical, chemical,               dermal risk assessment is not needed for
                                             existing hexythiazox tolerances in 40
                                                                                                     and fate/transport characteristics of                 hexythiazox, handler MOEs were
                                             CFR 180.448. EPA assessed dietary
                                                                                                     hexythiazox. Further information                      calculated for the inhalation route of
                                             exposures from hexythiazox in food as
                                                                                                     regarding EPA drinking water models                   exposure only. EPA uses the term ‘‘post-
                                             follows:
                                                                                                     used in pesticide exposure assessment                 application’’ to describe exposure to
                                                i. Acute exposure. Quantitative acute
                                                                                                     can be found at http://www.epa.gov/                   individuals that occur as a result of
                                             dietary exposure and risk assessments
                                                                                                     oppefed1/models/water/index.htm.                      being in an environment that has been
                                             are performed for a food-use pesticide,
                                                                                                        Surface water and groundwater                      previously treated with a pesticide.
                                             if a toxicological study has indicated the
                                                                                                     estimated drinking water concentrations               There is potential for post-application
                                             possibility of an effect of concern
                                                                                                     (EDWCs) do not result in any change to                for individuals exposed as a result of
                                             occurring as a result of a 1-day or single
                                                                                                     the existing EDWCs determined from a                  being in an environment that has been
                                             exposure. No toxic effects attributable to                                                                    previously treated with hexythiazox.
                                             a single dose of hexythiazox were                       recent drinking water assessment
                                                                                                     derived on hops. Specifically, since                  Adult residential post-application
                                             observed in the toxicology database;                                                                          dermal exposures were not assessed
                                             therefore, a quantitative acute dietary                 hops is already a registered use that was
                                                                                                     recently assessed during registration                 since no dermal hazard was identified
                                             exposure and risk assessment is                                                                               for hexythiazox. The residential post-
                                             unnecessary.                                            review, no new drinking water scenarios
                                                                                                     were identified with this proposed                    application exposure assessment for
                                                ii. Chronic exposure. In conducting                                                                        children included incidental oral
                                             the chronic dietary (food and drinking                  increase in application rates that would
                                                                                                     require a new drinking water                          exposure resulting from transfer of
                                             water) exposure assessment, EPA used                                                                          residues from the hand-to-mouth, object
                                             the Dietary Exposure Evaluation Model                   assessment to be conducted. In fact, the
                                                                                                     highest EDWCs associated with all uses                to- mouth, and from incidental ingestion
                                             (DEEM–FCID), Version 3.16, which uses                                                                         of soil.
                                             food consumption data from the U.S.                     of hexythiazox continue to be from use
                                                                                                                                                              Further information regarding EPA
                                             Department of Agriculture’s National                    on sorghum in the Western U.S., using
                                                                                                                                                           standard assumptions and generic
                                             Health and Nutrition Examination                        the Pesticide Root Zone Model (PRZM)                  inputs for residential exposures may be
                                             Survey, What We Eat in America                          surface water modeling scenario.                      found at http://www.epa.gov/pesticides/
                                             (NHANES/WWEIA) from 2003–2008. As                       Furthermore, based on the Agency’s                    science/residential-exposure-sop.html.
                                             to residue levels in food, EPA used                     previous assessment, the EDWCs of                        4. Cumulative effects from substances
                                             tolerance-level residues, assumed 100                   hexythiazox for chronic exposures are                 with a common mechanism of toxicity.
                                             percent crop treated (PCT), and                         estimated to be 4.3 parts per billion                 Section 408(b)(2)(D)(v) of FFDCA
                                             incorporated DEEM 7.81 default                          (ppb) for surface water and 2.4 ppb for               requires that, when considering whether
                                             processing factors when processing data                 ground water (DP 433290, 5/9/2016; DP                 to establish, modify, or revoke a
                                             were not available.                                     404023, 1/17/2012), and the higher of                 tolerance, the Agency consider
                                                iii. Cancer. Based on the data                       these values was used in the dietary                  ‘‘available information’’ concerning the
                                             summarized in Unit III.A., EPA has                      exposure model to assess chronic                      cumulative effects of a particular
                                             concluded that a nonlinear RfD                          dietary risk.                                         pesticide’s residues and ‘‘other
                                             approach is appropriate for assessing                      3. From non-dietary exposure. The                  substances that have a common
                                             cancer risk to hexythiazox. Cancer risk                 term ‘‘residential exposure’’ is used in              mechanism of toxicity.’’
                                             was assessed using the same exposure                    this document to refer to non-                           EPA has not found hexythiazox to
                                             estimates as discussed in Unit III.C.1.ii.,             occupational, non-dietary exposure                    share a common mechanism of toxicity
                                             Chronic exposure.                                       (e.g., for lawn and garden pest control,              with any other substances, and
                                                iv. Anticipated residue and percent                  indoor pest control, termiticides, and                hexythiazox does not appear to produce
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                                             crop treated (PCT) information. EPA did                 flea and tick control on pets).                       a toxic metabolite produced by other
                                             not use anticipated residue and/or PCT                  Hexythiazox is currently registered for               substances. For the purposes of this
                                             information in the dietary assessment                   the following residential uses, including             tolerance action; therefore, EPA has
                                             for hexythiazox. Tolerance-level                        ornamental landscape plantings, turf,                 assumed that hexythiazox does not have
                                             residues and/or 100 PCT were assumed                    and fruit and nut trees in residential                a common mechanism of toxicity with
                                             for all food commodities.                               sites.                                                other substances. For information


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                                             50088            Federal Register / Vol. 82, No. 208 / Monday, October 30, 2017 / Rules and Regulations

                                             regarding EPA’s efforts to determine                    E. Aggregate Risks and Determination of               Agency has determined that it is
                                             which chemicals have a common                           Safety                                                appropriate to aggregate chronic
                                             mechanism of toxicity and to evaluate                      EPA determines whether acute and                   exposure through food and water with
                                             the cumulative effects of such                          chronic dietary pesticide exposures are               intermediate-term residential exposures
                                             chemicals, see EPA’s Web site at http://                safe by comparing aggregate exposure                  to hexythiazox. Using the exposure
                                             www.epa.gov/pesticides/cumulative.                      estimates to the acute PAD (aPAD) and                 assumptions described in this unit for
                                                                                                     chronic PAD (cPAD). For linear cancer                 intermediate-term exposures, EPA has
                                             D. Safety Factor for Infants and                                                                              concluded the combined intermediate-
                                             Children                                                risks, EPA calculates the lifetime
                                                                                                     probability of acquiring cancer given the             term food, drinking water, and
                                                1. In general. Section 408(b)(2)(C) of               estimated aggregate exposure. Short-,                 residential oral exposures result in an
                                             FFDCA provides that EPA shall apply                     intermediate-, and chronic-term risks                 aggregate MOE for children (1,150) that
                                             an additional tenfold (10X) margin of                   are evaluated by comparing the                        greatly exceeds the LOC of 100, and is
                                             safety for infants and children in the                  estimated aggregate food, water, and                  not of concern.
                                             case of threshold effects to account for                residential exposure to the appropriate                  5. Aggregate cancer risk for U.S.
                                             prenatal and postnatal toxicity and the                 PODs to ensure that an adequate MOE                   population. As discussed in Unit III.
                                             completeness of the database on toxicity                exists.                                               C.1.iii., EPA concluded that regulation
                                             and exposure unless EPA determines                         1. Acute risk. An acute aggregate risk             based on the cRfD will be protective for
                                             based on reliable data that a different                 assessment takes into account acute                   both chronic and carcinogenic risks. As
                                             margin of safety will be safe for infants               exposure estimates from dietary                       noted in this unit, there are no chronic
                                             and children. This additional margin of                 consumption of food and drinking                      risks of concern; therefore, the Agency
                                             safety is commonly referred to as the                   water. No toxic effects attributable to a             concludes that aggregate exposure to
                                             Food Quality Protection Act Safety                      single dose of hexythiazox were                       hexythiazox will not pose a cancer risk.
                                             Factor (FQPA SF). In applying this                      observed in the toxicology database;                     6. Determination of safety. Based on
                                             provision, EPA either retains the default               therefore, a quantitative acute aggregate             these risk assessments, EPA concludes
                                             value of 10X, or uses a different                       risk assessment for hexythiazox is not                that there is a reasonable certainty that
                                             additional safety factor when reliable                  required.                                             no harm will result to the U.S. general
                                             data available to EPA support the choice                   2. Chronic risk. Using the exposure                population, or to infants and children
                                             of a different factor.                                  assumptions described in this unit for                from aggregate exposure to hexythiazox
                                                                                                     chronic exposure, EPA has concluded                   residues.
                                                2. Prenatal and postnatal sensitivity.
                                             The prenatal and postnatal toxicology                   that chronic exposure to hexythiazox                  IV. Other Considerations
                                             data base indicates no increased                        from food and water will utilize 93% of
                                                                                                     the cPAD for children 1–2 years of age,               A. Analytical Enforcement Methodology
                                             susceptibility of rats or rabbits to in
                                             utero and/or postnatal exposure to                      the population group receiving the                       An adequate High performance liquid
                                             hexythiazox.                                            greatest exposure. Based on the                       chromatography using ultra-violet
                                                                                                     explanation in Unit III.C.3., regarding               detection (HPLC/UV) analytical method
                                                3. Conclusion. EPA has determined                    residential use patterns, chronic                     is available for the enforcement of
                                             that reliable data show the safety of                   residential exposure to residues of                   tolerances for residues of hexythiazox
                                             infants and children would be                           hexythiazox is not expected.                          and its metabolites containing the PT–
                                             adequately protected if the FQPA SF                        3. Short-term risk. Short-term                     1–3 moiety in crop and livestock
                                             were reduced to 1x. That decision is                    aggregate exposure takes into account                 commodities. This method is listed in
                                             based on the following findings:                        short-term residential exposure plus                  the U.S. EPA Index of Residue
                                                i. The toxicity database for                         chronic exposure to food and water                    Analytical Methods under hexythiazox
                                             hexythiazox is complete.                                (considered to be a background                        as method AMR–985–87. The limit of
                                                ii. There is no indication that                      exposure level).                                      quantification (LOQ) for hexythiazox
                                             hexythiazox is a neurotoxic chemical                       Hexythiazox is currently registered for            residues is 0.02 ppm.
                                             and there is no need for a                              uses that could result in short-term
                                                                                                     residential exposure, and the Agency                  B. International Residue Limits
                                             developmental neurotoxicity study or
                                             additional UFs to account for                           has determined that it is appropriate to                In making its tolerance decisions, EPA
                                             neurotoxicity.                                          aggregate chronic exposure through food               seeks to harmonize U.S. tolerances with
                                                                                                     and water with short-term residential                 international standards whenever
                                                iii. There is no evidence that                       exposures to hexythiazox. Using the                   possible, consistent with U.S. food
                                             hexythiazox results in increased                        exposure assumptions described in this                safety standards and agricultural
                                             susceptibility in in utero rats or rabbits              unit for short-term exposures, EPA has                practices. EPA considers the
                                             in the prenatal developmental studies or                concluded the combined short-term                     international maximum residue limits
                                             in young rats in the 2-generation                       food, drinking water, and residential                 (MRLs) established by the Codex
                                             reproduction study.                                     inhalation exposures result in an                     Alimentarius Commission (Codex), as
                                                iv. There are no residual uncertainties              aggregate MOE for adults (7,500) that                 required by Federal Food, Drug and
                                             identified in the exposure databases.                   greatly exceeds the LOC of 100, and is                Cosmetic Act (FFDCA) section 408(b)(4).
                                             EPA made conservative (protective)                      not of concern.                                       The Codex Alimentarius is a joint
                                             assumptions in the ground and surface                      4. Intermediate-term risk.                         United Nations Food and Agriculture
                                             water modeling used to assess exposure                  Intermediate-term aggregate exposure                  Organization/World Health
                                             to hexythiazox in drinking water. EPA                                                                         Organization food standards program,
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                                                                                                     takes into account intermediate-term
                                             used similarly conservative assumptions                 residential exposure plus chronic                     and it is recognized as an international
                                             to assess post-application exposure of                  exposure to food and water (considered                food safety standards-setting
                                             children as well as incidental oral                     to be a background exposure level).                   organization in trade agreements to
                                             exposure of toddlers. These assessments                    Hexythiazox is currently registered for            which the United States is a party. EPA
                                             will not underestimate the exposure and                 uses that could result in intermediate-               may establish a tolerance that is
                                             risks posed by hexythiazox.                             term residential exposure, and the                    different from a Codex MRL; however,


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                                                              Federal Register / Vol. 82, No. 208 / Monday, October 30, 2017 / Rules and Regulations                                                    50089

                                             FFDCA section 408(b)(4) requires that                   responsibilities established by Congress              § 180.448 Hexythiazox; tolerances for
                                             EPA explain the reasons for departing                   in the preemption provisions of FFDCA                 residues.
                                             from the Codex level.                                   section 408(n)(4). As such, the Agency                    (a) * * *
                                                Codex has established an MRL for                     has determined that this action will not
                                             residues of hexythiazox on hops at 3                    have a substantial direct effect on States                         Commodity                      Parts per
                                             ppm. The U.S. tolerance for residues of                 or tribal governments, on the                                                                      million
                                             hexythiazox on hops cannot be                           relationship between the national
                                             harmonized based on approved label                      government and the States or tribal                     *          *          *               *        *
                                             instructions. Based on available residue                governments, or on the distribution of                Hop, dried cones ........................            20
                                             data, compliance with label instructions                power and responsibilities among the
                                             would result in exceedances of a                        various levels of government or between                   *           *          *           *         *
                                             tolerance harmonized with the Codex                     the Federal Government and Indian
                                             MRL.                                                    tribes. Thus, the Agency has determined               *        *     *       *       *
                                                                                                     that Executive Order 13132, entitled                  [FR Doc. 2017–23439 Filed 10–27–17; 8:45 am]
                                             V. Conclusion
                                                                                                     ‘‘Federalism’’ (64 FR 43255, August 10,               BILLING CODE 6560–50–P
                                               Therefore, the existing tolerance for                 1999) and Executive Order 13175,
                                             residues of the ovicide/miticide                        entitled ‘‘Consultation and Coordination
                                             hexythiazox and its metabolites                         with Indian Tribal Governments’’ (65 FR               DEPARTMENT OF TRANSPORTATION
                                             containing the (4-chlorophenyl)-4-                      67249, November 9, 2000) do not apply
                                             methyl-2-oxo-3-thiazolidine moiety in/                  to this action. In addition, this action              National Highway Traffic Safety
                                             on hop, dried cones is increased from                   does not impose any enforceable duty or               Administration
                                             2.0 ppm to 20 ppm.                                      contain any unfunded mandate as
                                             VI. Statutory and Executive Order                       described under Title II of the Unfunded              49 CFR Part 571
                                             Reviews                                                 Mandates Reform Act (UMRA) (2 U.S.C.                  [Docket No. NHTSA–2015–0056]
                                                This action amends an existing                       1501 et seq.).
                                                                                                                                                           RIN 2127–AL78
                                             tolerance under FFDCA section 408(d)                       This action does not involve any
                                             in response to a petition submitted to                  technical standards that would require                Motor Vehicle Safety Standards;
                                             the Agency. The Office of Management                    Agency consideration of voluntary                     Electronic Stability Control Systems
                                             and Budget (OMB) has exempted these                     consensus standards pursuant to section               for Heavy Vehicles
                                             types of actions from review under                      12(d) of the National Technology
                                             Executive Order 12866, entitled                         Transfer and Advancement Act                          AGENCY:  National Highway Traffic
                                             ‘‘Regulatory Planning and Review’’ (58                  (NTTAA) (15 U.S.C. 272 note).                         Safety Administration (NHTSA),
                                             FR 51735, October 4, 1993). Because                                                                           Department of Transportation.
                                                                                                     VII. Congressional Review Act
                                             this action has been exempted from                                                                            ACTION: Final rule; response to petition
                                             review under Executive Order 12866,                       Pursuant to the Congressional Review                for reconsideration.
                                             this action is not subject to Executive                 Act (5 U.S.C. 801 et seq.), EPA will
                                                                                                     submit a report containing this rule and              SUMMARY:    This final rule addresses a
                                             Order 13211, entitled ‘‘Actions                                                                               petition for reconsideration of the final
                                             Concerning Regulations That                             other required information to the U.S.
                                                                                                     Senate, the U.S. House of                             rule for FMVSS No. 136, Electronic
                                             Significantly Affect Energy Supply,                                                                           stability control systems for heavy
                                             Distribution, or Use’’ (66 FR 28355, May                Representatives, and the Comptroller
                                                                                                     General of the United States prior to                 vehicles. The petitioner, Truck and
                                             22, 2001) or Executive Order 13045,                                                                           Engine Manufacturers Association
                                             entitled ‘‘Protection of Children from                  publication of the rule in the Federal
                                                                                                     Register. This action is not a ‘‘major                (EMA), requested that NHTSA amend
                                             Environmental Health Risks and Safety                                                                         the test conditions for the agency’s
                                             Risks’’ (62 FR 19885, April 23, 1997).                  rule’’ as defined by 5 U.S.C. 804(2).
                                                                                                                                                           performance test by allowing a larger
                                             This action does not contain any                        List of Subjects in 40 CFR Part 180                   lane width for long wheelbase truck
                                             information collections subject to OMB                                                                        tractors. After a careful technical review
                                             approval under the Paperwork                              Environmental protection,
                                                                                                     Administrative practice and procedure,                of the petition and the issues raised by
                                             Reduction Act (PRA) (44 U.S.C. 3501 et                                                                        the petitioner, the agency has decided to
                                             seq.), nor does it require any special                  Agricultural commodities, Pesticides
                                                                                                     and pests, Reporting and recordkeeping                grant the petition because there is
                                             considerations under Executive Order                                                                          sufficient evidence to indicate that a
                                             12898, entitled ‘‘Federal Actions to                    requirements.
                                                                                                                                                           larger lane width is needed for testing
                                             Address Environmental Justice in                           Dated: October 6, 2017.                            of long wheelbase truck tractors.
                                             Minority Populations and Low-Income                     Daniel J. Rosenblatt,
                                                                                                                                                           DATES: The effective date of this final
                                             Populations’’ (59 FR 7629, February 16,                 Acting Director, Registration Division, Office
                                             1994).                                                                                                        rule is November 29, 2017.
                                                                                                     of Pesticide Programs.                                   Petitions for reconsideration: Petitions
                                                Since tolerances and exemptions that                   Therefore, 40 CFR chapter I is
                                             are established on the basis of a petition                                                                    for reconsideration of this final rule
                                                                                                     amended as follows:                                   must be received not later than
                                             under FFDCA section 408(d), such as
                                             the tolerance in this final rule, do not                                                                      December 14, 2017.
                                                                                                     PART 180—[AMENDED]
                                             require the issuance of a proposed rule,                                                                      ADDRESSES: Petitions for reconsideration
                                             the requirements of the Regulatory                      ■ 1. The authority citation for part 180              of this final rule must refer to the docket
                                                                                                                                                           and notice number set forth above and
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                                             Flexibility Act (RFA) (5 U.S.C. 601 et                  continues to read as follows:
                                             seq.), do not apply.                                                                                          be submitted to the Administrator,
                                                                                                         Authority: 21 U.S.C. 321(q), 346a and 371.        National Highway Traffic Safety
                                                This action directly regulates growers,
                                             food processors, food handlers, and food                ■ 2. Section 180.448 is amended by                    Administration, 1200 New Jersey
                                             retailers, not States or tribes, nor does               revising the entry ‘‘Hop, dried cones’’ in            Avenue SE., Washington, DC 20590.
                                             this action alter the relationships or                  the table in paragraph (a) to read as                 FOR FURTHER INFORMATION CONTACT: For
                                             distribution of power and                               follows:                                              technical issues, you may contact


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Document Created: 2017-10-28 00:29:15
Document Modified: 2017-10-28 00:29:15
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 October 30, 2017. Objections and requests for hearings must be received on or before December 29, 2017, and must be filed in accordance with the instructions provided in 40 CFR part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).
ContactMichael L. Goodis, P.E., Director, 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
FR Citation82 FR 50084 
CFR AssociatedEnvironmental Protection; Administrative Practice and Procedure; Agricultural Commodities; Pesticides and Pests and Reporting and Recordkeeping Requirements

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