Document NeDaa5145x40pkZgkJa7w7nRE

V January 9, 2009 Via Federal Express Document Processing Center (Mail Code 7407M) Room 6428 Attention: 8(e) Coordinator Office of Pollution Prevention and Toxics U.S. Environmental Protection Agency 1201 Constitution Ave., NW Washington, DC 20004 ZEHQ-Offi- AHZZL-3&7S DuPont Haskell Global Centers for Health and Environmental Sciences 1090 Elkton Road, P.O. Box 50 Newark, DE 19714-0050 Dear 8(e) Coordinator: Re: Perfluorooctanoate Anion (PFOA) --Updated Occupational Serum Sample Results Circleville, Ohio This letter is a supplement to our letter of March 25, 2008 which included serum sampling results from the Circleville, Ohio facility among other facilities. The updated serum sampling results for workers at the above referenced DuPont site are for 2008. The levels of PFOA reported with this submission are generally corroborative of previously reported levels in an occupational setting. This information is provided to the TSCA 8(e) office in view of the Agency's continued interest in perfluorinated substances and as precautionary measure. Sincerely, A. Michael Kaplan, Ph.D. Director - Regulatory Affairs AMK/BJD: clp (302) 366-5260 Attachment (1 page) ------ ___ 1 CONTAINS NO CBI DuPont Company Circleville Plant Circleville, Ohio Serum PFO A Blood Monitoring 2007 and 2008 Data Comparison Sam ple Num ber 1 2 3 4 5 6 7 8 Num ber of Sam ples Average M edian M inim um M axim um Std Dev 2007 2008 Results R esults (PPb) (PPb) 34 50 203 184 284 264 713 599 225 255 208 191 137 106 8 78 258 207 208 188 34 8 713 599 216 183 2007 results previously reported. These data represent replicate individual samples. Samples analyzed by Axys Analytical, Ltd, Sidney, British Columbia, Canada Results rounded to nearest whole number Barbara J. Dawson, CIH, C S P January 6, 2009