CTEPP: A Study to Monitor and Evaluate Pollutant Exposures for Young Children Marsha K. Morgan, U.S. EPA/NERL/HEASD/HEAB, MD-56, Research Triangle Park, NC 27711, phone 919-541- 2598, fax 919-541-0905, email email@example.com, URL http://epa.gov/heasd Linda S. Sheldon1, Jane C. Chuang2, Nancy K. Wilson3, and Christopher Lyu3. 1National Exposure Research Laboratory, Research Triangle Park, NC 27711; 2Battelle, 505 King Avenue, Columbus, OH 43201; 3Battelle, 100 Capitola Drive, Durham, NC 27713 Young children, particularly preschool ages 2-5, may have exposures to environmental chemicals that are much higher than older children, adolescents, or adults. These higher exposures may result from what children eat or drink, where they spend their time, and what they do there. In addition, preschool children may be affected more by these exposures because of their smaller body masses, immature body systems, and rapid physical development. The Children’s Total Exposure to Persistent Pesticides and Other Persistent Organic Pollutants (CTEPP) is a personal exposure measurement study involving about 260 preschool children in North Carolina and Ohio. It is the first large aggregate exposure study of young children. CTEPP is designed to investigate exposures that young children may have to common pollutants in their everyday environments, and to gain information on the various activities, environmental media, and pollutant characteristics that may influence children’s exposures. Aggregate exposures are determined for the preschool children through environmental sampling, time-activity diaries, food diaries and questionnaires. In addition, 10% of the preschool children (n=26) are videotaped for about 2 hours at homes in Ohio to supplement the activity diaries and observations. Potential doses are estimated by analysis of the urine samples. Environmental samples include duplicate diet, drinking water, urine, indoor and outdoor air, floor dust, play area soil, transferable residues, and wipes (hand, floor, and food preparation). Targeted pollutants of interest are organochlorine, organophosphorus, and pyrethroid pesticides, polychlorinated biphenyls, phenols, PAH, triazines, and phthalates. All of this information will be incorporated into a public-accessible database. Results of this study will be used by federal agencies, state and local agencies, nongovernmental organizations, academia, and the general public to improve the knowledge of the environmental pathways that are most important in young children’s exposures, improve approaches for estimating children’s exposures, and refine aggregate exposure assessments of children required under the Food Quality Protection Act (FQPA) of 1996.