United States      Prevention, Pesticides     EPA712-C-95-187
          Environmental Protection   and Toxic Substances     August 1995
          Agency        (7101)
&EPA    Residue Chemistry
          Test Guidelines
          OPPTS 860.1560
          Reasonable Grounds in
          Support of the Petition
               "Public Draft'

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                           INTRODUCTION
     This guideline is one of a series of test guidelines that have been
developed by the Office of Prevention, Pesticides and Toxic Substances,
United States Environmental Protection Agency for use in the testing of
pesticides and toxic substances, and the development of test data that must
be submitted to the Agency for review under Federal regulations.

     The Office of Prevention,  Pesticides and Toxic Substances (OPPTS)
has  developed this guideline through a  process of harmonization that
blended the testing  guidance and requirements that existed in the  Office
of Pollution Prevention and Toxics  (OPPT) and appeared in Title 40,
Chapter I,  Subchapter R of the Code of Federal Regulations  (CFR), the
Office of Pesticide Programs (OPP) which appeared in publications of the
National Technical  Information Service (NTIS) and the guidelines pub-
lished by the Organization for Economic Cooperation and Development
(OECD).

     The purpose of harmonizing these guidelines into a single  set of
OPPTS  guidelines is to minimize variations among the testing procedures
that must be performed to meet the data requirements of the U. S. Environ-
mental Protection Agency under the Toxic  Substances Control Act (15
U.S.C. 2601) and the Federal Insecticide,  Fungicide and Rodenticide Act
(7U.S.C. I36,etseq.).

     Public Draft Access Information: This draft guideline is part of a
series of related harmonized guidelines that  need to  be considered as a
unit. For copies: These guidelines are available electronically from the
EPA Public Access Gopher (gopher.epa.gov) under the heading "Environ-
mental Test Methods and Guidelines" or in paper by contacting the OPP
Public    Docket    at    (703)    305-5805    or    by    e-mail:
guidelines@epamail.epa.gov.

     To Submit Comments: Interested persons are invited to submit com-
ments. By mail: Public Docket and Freedom of Information Section, Office
of Pesticide Programs, Field  Operations Division (7506C), Environmental
Protection Agency,  401  M  St.  SW.,  Washington, DC 20460. In  person:
bring to: Rm. 1132, Crystal Mall #2, 1921 Jefferson Davis Highway, Ar-
lington, VA. Comments may also be submitted  electronically by sending
electronic mail (e-mail) to: guidelines@epamail.epa.gov.

     Final  Guideline Release:  This document is available  from the U.S.
Government Printing Office,  Washington, DC 20402 on The Federal Bul-
letin Board. By modem dial 202-512-1387, telnet:  federal.bbs.gpo.gov
3001, or call 202-512-1530 for disks or  paper  copies.  This guideline is
available in ASCII and PDF (portable document format).

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OPPTS 860.1560 Reasonable grounds in support of the petition.
     (a) Scope.

     (1) Applicability. This guideline is intended to meet testing require-
ments  of both the  Federal Insecticide, Fungicide, and Rodenticide Act
(FIFRA) (7 U.S.C. 136, et seq.) and the Federal Food, Drug, and Cosmetic
Act (FFDCA) (21 U.S.C. 301, et seq.)

     (2) Background. The  source material  used in developing  this har-
monized OPPTS test  guideline  is OPP guideline 171-7 (see  reference in
paragraph (c)(l)). This OPPTS guideline should be used in conjunction
with OPPTS  guideline 860.1000, Background, which provides general in-
formation and overall guidance for the 860  series on Residue Chemistry.

     (b) Reasonable grounds in  support of the petition (Section G of
a petition).

The petitioner should present the rationale of how the residue  data support
the proposed tolerance. The presentation should include brief discussions
on the adequacy of the analytical  method with respect to sensitivity and
determination of the total  toxic residue; an explanation of any aberrant
residue values reported; an explanation for the omission or substitution
of requirements set forth in these guidelines; and any other residue consid-
erations pertinent to the proposed  use. Where appropriate, a discussion
should be furnished on the status of other components of the formulations.

In those instances where the dietary risk from use of the pesticide is likely
to be unacceptable, assuming tolerance level residues on the entire crop,
the petitioner should  provide information or data that could be used to
estimate  a more realistic dietary exposure.  In the case  of  concerns with
chronic risk,  determination of the  average residue obtained in crop field
trials would  be useful. Also, information on  actual or projected market
shares for existing or  proposed uses, respectively, can be submitted for
review by OPP's Biological and Economic Analysis Division.

     (c) Reference. The source material for this guideline  was taken di-
rectly from the following document.

     (1)  U.S. Environmental Protection Agency,  Pesticide  Assessment
Guidelines, Subdivision O,  Residue Chemistry. EPA  Report No. 540/9-
82-023,  October, 1982, (Available from National Technical Information
Service, Springfield, VA)

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