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Activity Number:
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73
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Type:
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Contributed
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Date/Time:
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Sunday, August 2, 2009 : 4:00 PM to 5:50 PM
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Sponsor:
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Section on Risk Analysis
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| Abstract - #305505 |
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Title:
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Decomposition Techniques in the Application of Pesticide Exposure
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Author(s):
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David Diez*+
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Companies:
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University of California, Los Angeles
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Address:
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11939 Mayfield Ave, Apt 5, Los Angeles, CA, 90049,
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Keywords:
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dietary exposure ; risk assessment ; pesticide ; decomposition technique
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Abstract:
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Permissible levels of pesticide residues in foods are regulated by the US Environmental Protection Agency (EPA). The EPA's risk assessments include dietary exposure estimates which incorporate residues measured in foods and food consumption data. Importantly, the residue data used by the EPA is collected on a composite basis (e.g. 5 lbs of produce) and data on individual items of produce are not generally available. As a result, high-end acute dietary exposures to certain foods may be underestimated. We summarize an investigation into a decomposition technique that makes use of maximum likelihood procedures to estimate a single serving residue distribution from composite residues in both simulated and empirical data. The degree of underestimation in dietary exposure will also be assessed for multiple food items using this decomposition technique.
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- The address information is for the authors that have a + after their name.
- Authors who are presenting talks have a * after their name.
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