Pesticide Tolerances:

Federal Register: March 23, 2011 (Volume 76, Number 56)

Rules and Regulations

Page 16308-16311

From the Federal Register Online via GPO Access [wais.access.gpo.gov]

DOCID:fr23mr11-20

Page 16308

ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 180

EPA-HQ-OPP-2005-0477; FRL-8866-2

Dichlormid; Pesticide Tolerances

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

SUMMARY: This regulation establishes tolerances for residues of dichlormid in or on field corn, pop corn, and sweet corn commodities.

Dow AgroSciences requested these tolerances under the Federal Food,

Drug, and Cosmetic Act (FFDCA).

DATES: This regulation is effective March 23, 2011. Objections and requests for hearings must be received on or before May 23, 2011, and must be filed in accordance with the instructions provided in 40 CFR part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).

ADDRESSES: EPA has established a docket for this action under docket identification (ID) number EPA-HQ-OPP-2005-0477. All documents in the docket are listed in the docket index available at http:// www.regulations.gov. Although listed in the index, some information is not publicly available, e.g., Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the

Internet and will be publicly available only in hard copy form.

Publicly available docket materials are available in the electronic docket at http://www.regulations.gov, or, if only available in hard copy, at the OPP Regulatory Public Docket in Rm. S-4400, One Potomac

Yard (South Bldg.), 2777 S. Crystal Dr., Arlington, VA. The Docket

Facility is open from 8:30 a.m. to 4 p.m., Monday through Friday, excluding legal holidays. The Docket Facility telephone number is (703) 305-5805.

FOR FURTHER INFORMATION CONTACT: Pv Shah, Registration Division

(7505P), Office of Pesticide Programs, Environmental Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; telephone number: (703) 308-1846; e-mail address: shah.pv@epa.gov.

SUPPLEMENTARY INFORMATION:

1. General Information

   1. Does this action apply to me?

      You may be potentially affected by this action if you are an agricultural producer, food manufacturer, or pesticide manufacturer.

      Potentially affected entities may include, but are not limited to those engaged in the following activities:

      Crop production (NAICS code 111).

      Animal production (NAICS code 112).

      Food manufacturing (NAICS code 311).

      Pesticide manufacturing (NAICS code 32532).

      This listing is not intended to be exhaustive, but rather to provide a guide for readers regarding entities likely to be affected by this action. Other types of entities not listed in this unit could also be affected. The North American Industrial Classification System

      (NAICS) codes have been provided to assist you and others in determining whether this action might apply to certain entities. If you have any questions regarding the applicability of this action to a particular entity, consult the person listed under FOR FURTHER

      INFORMATION CONTACT.

   2. 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.gpoaccess.gov/ecfr.

   3. 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-2005-0477 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

      May 23, 2011. 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 that does not contain any 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 a copy of your non-CBI objection or hearing request, identified by docket ID number EPA-HQ-OPP-2005-0477, by one of the following methods:

      Federal eRulemaking Portal: http://www.regulations.gov.

      Follow the on-line instructions for submitting comments.

      Mail: Office of Pesticide Programs (OPP) Regulatory Public

      Docket (7502P), Environmental Protection Agency, 1200 Pennsylvania

      Ave., NW., Washington, DC 20460-0001.

      Delivery: OPP Regulatory Public Docket (7502P),

      Environmental Protection Agency, Rm. S-4400, One Potomac Yard (South

      Bldg.), 2777 S. Crystal Dr., Arlington, VA. Deliveries are only accepted during the Docket Facility's normal hours of operation (8:30 a.m. to 4 p.m., Monday through Friday, excluding legal holidays).

      Special arrangements should be made for deliveries of boxed information. The Docket Facility telephone number is (703) 305-5805.

2. Summary of Petitioned-For Tolerance

   In the Federal Register of December 22, 2010 (75 FR 80489) (FRL- 8857-8), EPA issued a notice pursuant to section 408(d)(3) of FFDCA, 21

   U.S.C. 346a(d)(3), announcing the filing of a pesticide petition (PP 9E7517) by Dow AgroSciences, 9330 Zionsville Rd., Indianapolis, IN 46268. The petition requested that 40 CFR part 180 be amended by establishing permanent tolerances for residues of the herbicide safener dichlormid, N,N-diallyl-2,2-dichloroacetamide, in or on corn, field, forage; corn, field, grain; corn, field, stover; corn, pop, grain; corn, pop, stover; corn, sweet, forage; corn, sweet, kernel plus cob with husks removed; and corn, sweet, stover at 0.05 parts per million

   (ppm). That notice referenced a summary of the petition prepared by Dow

   AgroSciences, the registrant, which is available in the docket, http:// www.regulations.gov. Comments were received on the notice of filing.

   EPA's response to these comments is discussed in Unit IV.C.

3. 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

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   all anticipated dietary exposures and all other exposures for which there is reliable information.'' This includes exposure through drinking water and in residential settings, but does not include occupational exposure. Section 408(b)(2)(C) of FFDCA requires EPA to give special consideration to exposure of infants and children to the pesticide chemical residue in establishing a tolerance and to ``ensure that there is a reasonable certainty that no harm will result to infants and children from aggregate exposure to the pesticide chemical residue.''

   Consistent with section 408(b)(2)(D) of FFDCA, and the factors specified in section 408(b)(2)(D) of FFDCA, EPA has reviewed the available scientific data and other relevant information in support of this action. EPA has sufficient data to assess the hazards of and to make a determination on aggregate exposure for dichlormid including exposure resulting from the tolerances established by this action.

   EPA's assessment of exposures and risks associated with dichlormid follows.

   In the Federal Register of March 27, 2000 (65 FR 16143) (FRL-6498- 7), EPA published a final rule establishing time-limited tolerances for residues of the herbicide safener dichlormid in or on field corn forage, grain and stover; and pop corn grain and stover at 0.05 ppm. In the Federal Register of September 30, 2004 (69 FR 58285) (FRL-7680-8),

   EPA published a final rule establishing time-limited tolerances for residues of dichlormid in or on sweet corn forage, kernel plus cob with husks removed, and stover at 0.05 ppm. EPA has extended the expiration date of the time-limited tolerances on several occasions, most recently in the Federal Register of July 29, 2009 (74 FR 37621) (FRL-8422-2).

   The tolerances expired on December 31, 2010.

   The corn tolerances were time-limited due to an incomplete database for dichlormid. Data gaps included several chemistry and toxicology studies, as identified in the March 27, 2000 and September 30, 2004 final rules. In addition, in December, 2007, EPA began requiring functional immunotoxicity testing of all food and non-food use pesticides (40 CFR part 158, subpart F), including safeners, such as dichlormid. The outstanding chemistry and toxicology data (including immunotoxicity testing) have all been submitted and reviewed, so that the database for dichlormid is now considered complete. No changes in tolerance levels or toxicological endpoints and doses used in the human health risk assessment for dichlormid are needed as a result of the new data. Copies of EPA's reviews of these data may be found in docket ID number EPA-HQ-OPP-2005-0477.

   The risk assessments that EPA relied on in establishing and extending the time-limited tolerances for dichlormid were highly conservative. Due to the nature and number of data gaps and qualitative evidence of increased susceptibility of in utero rabbits in a prenatal developmental toxicity study, the FQPA safety factor (SF) was retained at 10X for the acute dietary risk assessment and increased to 30X for the chronic dietary risk assessment. Since the data gaps have been filled, uncertainty factors associated with database deficiencies may be removed. In addition, EPA used tolerance level residues, 100 percent crop treated, and default processing factors in the dietary food exposure assessments and made conservative (protective) assumptions in the modeling used to assess exposure to dichlormid in drinking water.

   Using these highly conservative assumptions and SFs, acute dietary exposure to dichlormid in food was estimated to be less than or equal to 7.5% of the acute population adjusted dose (aPAD) for all population subgroups; chronic dietary exposure to dichlormid in food was estimated to be less than or equal to 15% of the chronic population adjusted dose

   (cPAD) for all populations subgroups.

   Because this prior risk assessment showed dichlormid risks to be acceptable and the effect of submission of the required data on the assessment of dichlormid risk will be to lower estimated risks (due to the removal of additional safety factors), EPA is relying on that prior risk assessment and the findings in the prior dichlormid FR notices, subject to one modification, to demonstrate the safety of the tolerances established in this action. The one modification of the prior risk assessment and FR notices is to update how exposure to dichlormid in drinking water is factored into the risk assessment.

   Previously, EPA assessed aggregate exposure (food and drinking water) to dichlormid using the DWLOC (drinking water level of comparison) approach. The DWLOC is the concentration of a chemical in drinking water that would be acceptable as an upper limit considering total aggregate exposure to that chemical from food, water, and residential sources. In this case, there are no residential uses of dichlormid. Acute and chronic aggregate risks from dichlormid exposure were assessed by comparing the calculated DWLOCs to the estimated environmental concentrations (EECs) of dichlormid in surface water and groundwater. Since the EECs (