Document x1jQzgr7JqRD71EVz8eKX4Dkm

r P-1 HK' - O cZo 7 - 7 //- M Jjb' 377y DuPont Haskell Laboratory for Health and Environmental Sciences Elkton Road, P.O. Box 50 Newark, DE 19714-0050 February 8, 2007 mH# 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 20460 Dear 8(e) Coordinator: 8EHQ-03 81-0394 Ammonium Perfluorooctanoate (APFO Linear) This letter is to follow-up on our correspondence with the Agency of June 19, 2006 concerning a 28-day immunotoxicity study in male rats and mice with the above referenced substance. Enclosed please find copies of the final reports. Sincerely, Cl ciU-Ui; X o /C A. Michael Kaplan, Ph.D. Director - Regulatory Affairs and Occupational Health '' AMK: clp (302) 366-5260 . Enclosure (2): Ammonium Perfluorooctanoate: 28-Day Immunotoxicity Study in Male Rats; DuPont-18317 Ammonium Perfluorooctanoate: 28-Day Immunotoxicity Study in Male Mice; DuPont-18318 contains NO CBI nO I