Document 6wEN9Qk0wvozwKoQYoZB8D2GR

~-- - _- P .1 DuPont Haskell Laboratory for Health and Environmental Sciences Elkton Road, P .O . Box 5 0 N ewark, DE 19714-005 0 ~ February 8, 200 7 - Via Federal Express 3 ((~, ' Document Processing Center ( Mail Code 7407M ) Room 642 8 Attention : 8(e) Coordinator Office of Pollution Prevention and Toxics U .S . Environmental Protection Agenc y 1201 Constitution Ave ., Washington, DC 20460 NW 1z' Dear 8(e) Coordinator : 8EHQ-03 81-039 4 Ammonium Perfluorooctanoate ( APFO Linear ) This le tt er is to follow-up on our correspondence with the Agency of June 19, 2006 conce rn ing a 28-day immunotoxicity study in male rats and mice with the above referenced substance . Enclosed please find copies of the fi nal reports . Sincerely, C I 't? A . Michael Kaplan, Ph .D . Director - Regulatory Affairs and Occupational Health AMK : cl p (302) 366-526 0 Enclosure (2) : Ammonium Perfluorooctanoate : 28-Day Immunotoxicity Study in Male Rats ; DuPont-1831 7 Ammonium Perfluorooctanoate : 28-Day Immunotoxicity Study in Male Mice ; DuPont-18318 CONTAINS No Ce,