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Exposure Modeling Public Meeting; Notice of Public Meeting

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Environmental Protection Agency (EPA).




An Exposure Modeling Public Meeting will be held for 1 day on March 24, 2014. This notice announces the location and time for the meeting and sets forth the tentative agenda topics.


The meeting will be held on March 24, 2014, from 9 a.m. to 4:30 p.m. Requests to participate in the meeting must be received on or before March 7, 2014.

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.


The meeting will be held at the Environmental Protection Agency, Office of Pesticide Programs (OPP), One Potomac Yard (South Building), First Floor Conference Center (S-1204/06), 2777 S. Crystal Drive, Arlington, VA 22202.

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Melanie Biscoe, Environmental Fate and Effects Division, Office of Pesticide Programs, Environmental Protection Agency, 1200 Pennsylvania Ave. NW., Washington, DC 20460-0001; telephone number: (703) 305-7106; fax number: (703) 347-8011; email address:

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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. 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:

  • Agriculture, forestry, fishing and hunting (NAICS code 11).
  • Utilities (NAICS code 22).
  • Professional, scientific and technical (NAICS code 54).

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

The docket for this action, identified by docket identification (ID) number EPA-HQ-OPP-2009-0879, is available at or at the Office of Pesticide Programs Regulatory Public Docket (OPP Docket) in the Environmental Protection Agency Docket Center (EPA/DC), EPA West 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​dockets.

II. Background

On a biannual interval, an Exposure Modeling Public Meeting (EMPM) is held for presentation and discussion of current issues related to modeling pesticide fate, transport, and exposure for risk assessment in a regulatory context. Meeting dates and abstract requests are announced through the “empmlist” forum on the LYRIS list server at​read/​all_​forums/​. The EMPM scheduled for October 2013 was canceled due to the government shutdown. As a consequence, EPA will use the October 2013 agenda at the March 24, 2014 meeting with the addition of a presentation on PRZM-GW model implementation and evaluation due to extensive stakeholder interest.

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 March 7, 2014.Start Printed Page 10519

IV. Tentative Topics for the Meeting

1. Estimating the magnitude of pesticide effects on avian reproductive success: Markov chain nest productivity model (MCnest).

2. The Surface Water Concentration Calculator.

3. Development of a conceptual model for estimating aquatic exposure from the use of pesticides on rice using the Pesticide Flooded Application Model.

4. Evaluation of NAFTA kinetics guidance.

5. Comparison of multiple spray drift deposition data sets.

6. Guidance on modeling offsite deposition of pesticides via spray drift.

7. Use of the OECD ENASGIPS tool in U.S. settings.

8. A better sorption model for predicting pesticide behavior.

9. The significance of time-dependent sorption on leaching potential: A comparison of measured field results and modeled estimates.

10. Evaluation of PRZM-GW using long-term ground water monitoring data.

11. Comparing ground water models—why are there differences?

12. Modeling pesticide fate and transport through flowing water bodies for endangered species assessment in the California Central Valley.

13. Spatial Aquatic Model (SAM) pilot project update.

14. EPA PRZM-GW Evaluation.

List of Subjects

Environmental protection, Endangered species assessment, Exposure modeling, Groundwater, Leaching, Pesticide exposure assessment, Pesticide monitoring, Spray drift.

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Dated: February 3, 2014.

Donald J. Brady,

Director, Environmental Fate and Effects Division, Office of Pesticide Programs.

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[FR Doc. 2014-04103 Filed 2-24-14; 8:45 am]