Pesticide Data Program

Annual Summary Calendar Year 1999

Appendix F

Distribution of Residues for Apple Single Serving Survey

(Page 82)

Note: A special survey to address acute dietary risk assessment needs was conducted in 1999. Composite and corresponding single serving apple samples were analyzed for identified organophosphates to provide data on the distribution of targeted residues within a sample. Composite samples consisting of 10 half apples were analyzed for azinphos methyl and chlorpyrifos. If composite sample results exceeded established trigger concentrations for azinphos methyl and/or chlorpyrifos, the corresponding single serving portions, or half apples, were analyzed for each sample. During the early phase of this survey, a single whole apple was also analyzed for each sample. During the latter phase of the survey, half of the tenth apple comprising the composite was analyzed as a single serving for each sample.

Composite and corresponding triggered single serving residue results were used by EPA and private contractors to develop and evaluate sample decompositing models. When validated, these models may be used to translate composite to single serving data for use in acute dietary risk assessments.

Appendix F shows the distribution of residues for all apple composite and single serving samples analyzed. This appendix also lists residue findings for azinphos methyl and chlorpyrifos for the 120 samples that triggered single serving analysis based upon composite results. For samples analyzed during the early phase of this survey, a value for the single, whole apple is also given.

Refer to the Appendix E cover page for a definition of Codex MRLs/EMRLs.

Distribution of Residues for Apple Composite & Single-Serving Samples

(Azinphos methyl & Chlorpyrifos only)

(page 83)

Residues Exceeding Established Tolerance

APPENDIX L. SAMPLES REPORTED TO FDA AS EXCEEDING THE TOLERANCE
OR WITHOUT ESTABLISHED TOLERANCE
(per Code of Federal Regulations, Title 40, Part 180)

(page 108)

Note: Appendix L shows residues reported to FDA as exceeding the tolerance or residues for which no established tolerance was listed under the Code of Federal Regulations (CFR), Title 40, Part 180. In 1999, 19 samples were found to have 19 residues at levels exceeding the established tolerance, with 5 each in cantaloupe and strawberries, 3 in spinach, 2 each in cucumbers and pears, and 1 in winter squash and sweet bell peppers. In addition, 301 residues were reported as without established tolerance as follows: 244 samples contained 1 residue without an established tolerance, 24 samples contained 2 residues without tolerances and 3 samples contained 3 residues without tolerances. Appendix L also noted if metabolites (or isomers) were detected as part of the same sample. In instances where both parent and metabolite (or isomer) were detected, PDP accounted for both as part of the same tolerance expression.

 

source: http://www.ams.usda.gov/science/pdp/ 22jan01