[Federal Register Volume 76, Number 166 (Friday, August 26, 2011)]
[Page 53454]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-21954]



[EPA-HQ-OPP-2009-0879; FRL-8885-9]

Exposure Modeling Public Meeting; Notice of Public Meeting

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice.


SUMMARY: An Exposure Modeling Public Meeting (EMPM) will be held for 
one day on September 20, 2011. This notice announces the location and 
time for the meeting and sets forth the tentative agenda topics.

DATES: The meeting will be held on September 20, 2011 from 9 a.m. to 
4:30 p.m. Requests to participate in the meeting must be received on or 
before September 6, 2011. To request accommodation of a disability, 
please contact the person listed under FOR FURTHER INFORMATON CONTACT, 
preferably at least 10 days prior to the meeting, to give EPA as much 
time as possible to process your request.

ADDRESSES: The meeting will be held at the Environmental Protection 
Agency, Office of Pesticide Programs (OPP), One Potomac Yard (South 
Building), Fourth Floor Conference Center (S-4370-80), 2777 S. Crystal 
Drive, Arlington, VA 22202.

FOR FURTHER INFORMATION CONTACT: Andrew Shelby, Environmental Fate and 
Effects Division (7507P), Office of Pesticide Programs, Environmental 
Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-
0001; telephone number: (703) 347-0119; fax number: (703) 305-6309; e-
mail address: shelby.andrew@epa.gov.


I. General Information

A. Does this action apply to me?

    You may be potentially affected by this action if you are required 
to conduct testing of chemical substances under the Toxic Substances 
Control Act (TSCA), the Federal Food, Drug, and Cosmetic Act (FFDCA), 
or the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). 
Since other entities may also be interested, the Agency has not 
attempted to describe all the specific entities that may be affected by 
this action. If you have any questions regarding the applicability of 
this action to a particular entity, consult the person listed under FOR 

B. How can I get copies of this document and other related information?

    EPA has established a docket for this action under docket ID number 
EPA-HQ-OPP-2009-0879. Publicly available docket materials are available 
either in the electronic docket at http://www.regulations.gov, or, if 
only available in hard copy, at the Office of Pesticide Programs (OPP) 
Regulatory Public Docket in Rm. S-4400, One Potomac Yard (South Bldg.), 
2777 S. Crystal Dr., Arlington, VA. The hours of operation of this 
Docket Facility are from 8:30 a.m. to 4 p.m., Monday through Friday, 
excluding legal holidays. The Docket Facility telephone number is (703) 

II. Background

    On a biannual interval, an Exposure Modeling Public Meeting will be 
held for presentation and discussion of current issues related to 
modeling pesticide fate, transport, and exposure in risk assessment in 
a regulatory context. Meeting dates and abstract requests are announced 
through the ``empmlist'' forum on the LYRIS list server at https://lists.epa.gov/read/all_forums/.

III. How can I request to participate in this meeting?

    You may submit a request to participate in this meeting to the 
person listed under FOR FURTHER INFORMATION CONTACT. Do not submit any 
information in your request that is considered CBI. Requests to 
participate in the meeting, identified by docket ID number EPA-HQ-OPP-
2009-0879, must be received on or before September 6, 2011.

IV. Tentative Topics for the Meeting

    Tentative topics for the meeting will include presentations related 
to aquatic exposure modeling and monitoring. Specifically, 
presentations will include the following:
    1. Use-Exposure Relationships of Pesticides for Aquatic Risk 
    2. Refinements to the USEPA Tier II Drinking Water Risk Assessment 
Guidance: Addressing Atypical Use Patterns.
    3. Generalized Haber's Law for Exponential Concentration Decline 
with Application to Riparian-Aquatic Pesticide Ecotoxicity.
    4. Pesticide Aquatic Exposure Scenarios and Modeling for Juvenile 
Pacific Salmonid Flood Plain Habitat.
    5. Regional Analysis of the Environmental Risk with the GIS-Base 
Pesticide Risk Indicator SYNOPS.
    6. Herbicide Volatilization Trumps Runoff Losses: A Multiyear 
    7. Implementation of Drift Fractions Generated by Spray Drift 
Models for Exposure and Risk Assessments.
    8. Percent Crop Area (PCA) Project Update.
    9. Tier II Groundwater Model (PRZM-GW) Project Update.
    10. Spatial Aquatic Model (SAM) Project Update.
    11. Atrazine Scientific Advisory Panel (SAP) Meeting Summary.

List of Subjects

    Environmental protection, Modeling, Monitoring, Spray drift, Ground 
water, Aquatic risk assessment, Salmonid, Atrazine, Spatial aquatic 
model, Pesticides.

    Dated: August 22, 2011.
 Arthur-Jean Williams,
Acting Director, Environmental Fate and Effects Division, Office of 
Pesticide Programs.
[FR Doc. 2011-21954 Filed 8-25-11; 8:45 am]