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EPA Children's Pesticide Exposure Measurement Program

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Abstract: The U.S. EPA's National Exposure Research Laboratory conducts research in support of the Food Quality Protection Act (FQPA) of 1996. FQPA requires that children's risks to pesticide exposures be considered during the tolerance-setting process. FQPA requires exposure assessments to be conducted for all potential sources, routes and pathways, not just dietary intake. It also requires that exposure assessments use high quality and high quantity exposure data or models based on exposure factors generated from existing, reliable data.

Currently, data on children's exposures and activities are very limited and insufficient to support quantitative assessments that do not rely heavily on major default assumptions as substitutes for missing information. Results derived from an initial assessment of critical exposure pathways and factors for assessing children's residential exposures to pesticides indicate that dermal exposure and nondietary ingestion may result in high exposures for children following residential applications. However, there are so few data associated with these pathways that exposure estimates may vary by orders of magnitude, depending upon the assumptions and exposure factors selected. Studies across all ages of children, but especially for very young children, are required to characterize activities that contribute to dermal exposure in important microenvironments. Studies are also needed to characterize contact and transfer factors for non-dietary ingestion.

The goal of our program is to develop and evaluate protocols for assessing children's aggregate exposure to pesticides, and to conduct fields studies to collect data required to reduce the reliance on default assumptions in development of quantitative exposure assessments. To address this goal, studies are being conducted in the following areas:

1. Microenvironment/macroactivity patterns for children;
2. Pesticide use patterns;
3. Distribution of pesticide residues in nonoccupational microenvironments;
4. Exposure measurements using the microactivity assessment approach;
5. Exposure assessments using the macroactivity assessment approach; and
6. Field studies to verify assessment methods.
A review and outputs of specific studies will be presented.

This work has been funded wholly or in part by the United States Environmental Protection Agency under contract nos. 68-D-99-011 to Battelle and 68-D-99-012 to Research Triangle Institute. It has been subjected to Agency review and approved for publication.
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Citation:Sheldon, L. S., E. A. Cohenhubal, N. S. Tulve, M. K. Morgan, D. M. Stout II, L. J. Melnyk, and R. C. Fortmann. EPA Children's Pesticide Exposure Measurement Program. Presented at 2002 International State of Science Symposium on Agricultural Exposures and Cancer, Oxford, United Kingdom, November 19-22, 2002.
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Exposure Measurements & Analysis Branch
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Product Type: Abstrct/Oral
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Presented: 11/19/2002
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Related Entries:
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Bullet Item Human Exposure Measurements Children's Focus
spacer Relationship Reason:   A Project of the Product
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Last Updated on Monday, October 22, 2007
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