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LEVELS OF ORGANOCHLORINE, ORGANOPHOSPHATE, AND PYRETHROID PESTICIDES IN CTEPP NORTH CAROLINA MULTIMEDIA SAMPLES
Citation:
Morgan, M K., N K. Wilson, J. C. Chuang, N. Junod, M. C. Brinkman, AND C. Lyu. LEVELS OF ORGANOCHLORINE, ORGANOPHOSPHATE, AND PYRETHROID PESTICIDES IN CTEPP NORTH CAROLINA MULTIMEDIA SAMPLES. Presented at International Society of Exposure Analysis 2002 Conference, Vancouver, Canada, August 11-15, 2002.
Impact/Purpose:
The overall objectives of CTEPP were to measure the aggregate exposures of approximately 260 preschool children and their adult caregivers to low levels of a suite of pesticides and organic pollutants that the children may encounter in their everyday environments, and to apportion the routes of exposure and estimate the relative contributions of each route.
Description:
CTEPP (Children's Total Exposure to Persistent Pesticides and Other Persistent Organic Pollutants) is a pilot study of the possible exposures of 257 preschool children and their primary adult caregivers to pollutants commonly found in their everyday environments. Sampling was performed over 48-hr periods at the children's daycare centers and individual homes in 12 counties in North Carolina and Ohio. Collected media included duplicate diet, drinking water, urine, indoor and outdoor air, floor dust, play area soil, transferable residues, and wipes (hand, floor, and food preparation). The samples from North Carolina have been extracted and analyzed chemically by GC/MS for many pesticides including organochlorines (OCs), organophosphates (OPs), and pyrethroids. Most of the OC pesticides are no longer used in the United States. The OP pesticides are still used, especially for nonresidential applications. However, in homes and child daycare centers, they are increasingly replaced by pyrethroids. We measured the OCs aldrin, -chlordane, -chlordane, dieldrin, p,p'-DDE, p,p'-DDT, endrin, lindane, and heptachlor, the OPs diazinon and chlorpyrifos, and the pyrethrins cis-permethrin, trans-permethrin, and cyfluthrin. Here we report the preliminary results for levels of the OC, OP, and pyrethroid pesticides found in multiple environmental media collected in the child daycare centers and homes of 130 North Carolina preschool children. Of all the measured pesticides, cis-permethrin and trans-permethrin were the most abundant in indoor floor dust (54.8 and 48.4 ug/g), dermal wipes (32.5 and 32.7 ug/sample), food preparation wipes (201.8 and 208.9 ug/m2), and transferable residues (34.0 and 36.3 ug/m2), respectively. The mean concentrations of cis- and trans-permethrin were 3.4 and 3.3 ug/g (indoor floor dust), 0.3 and 0.3 ug/sample (dermal wipes), 16.6 and 17.4 ug/m2 (food preparation wipes), and 5.9 and 6.4 ug/m2 (transferable residues), respectively. Trans-permethrin was also the most abundant pesticide in floor wipes (10.1 ug/m2). Diazinon was the most abundant pesticide in soil (8.2 ug/g), indoor air (1.9 ug/m3), and outdoor air (0.2 ug/m3).
This work has been funded wholly or in part by the United States Environmental Protection Agency under contract #68-D-99-011 to Battelle. It has been subjected to Agency review and approved for publication.