Document 5kNBNvdVOYbL38708vr1RMRYN

3M Specialty Materials 3M Center St, Paul MN 55 144-1000 651 733 1i 10 February 20, 2008 Via Hand Delivery Document Control Office Docket AR-226 EPA East Building, Room 6428 1201 Constitution Ave., N.W. Washington, DC 20460 Phone: 202-564-8930 Attention: OPPT Docket No. AR-226 (Toni Krasnic - Room 4410L) Re: Information on Periluorooctane Sulfonate, Perfluorooctanoic Acid, and Related Compounds Dear Mr, Krasnic: This continues 3M's voluntary submissions of data on periluorooctane sulfonate (PFOS), perfluorooctanoic acid (PFOA), and related compounds. We are enclosing a CD which contains PDF copies of the following: B.M. Elcombe, "4-Week Study to Investigate Periluorooctane Sulfonate (PFOS)-Induced Hepatomegaly in Male Sprague Dawley Rats," CXR Biosciences, February 8, 2008. Stump, et. ah, "An Oral (Gavage) Developmental Neurotoxicity and Thyroid Function Study of MTDID 208 [PFOS] in Rats," WIL Research Laboratories, January 10, 2008. Krueger, et. ah, "PFOS: A Survival and Growth Sediment Toxicity Test with Chironomus tentans using Spiked Sediment, Final Report," Wildlife International Ltd., November 27, 2007, along with robust summary of the study. Lundin, Jessica and Bruce H. Alexander. "Mortality of Employees of an Ammonium Perfluorooctanoate Production Facility," Division of Environmental Health Sciences, University of Minnesota, August 22, 2007. February 20, 2008 Page 2 o f 2 In addition, 3M would like to note for the record that its May 23, 2000 submission incorrectly identified the test substance in the study at AR226-0379 as N-ethylperfluorooctane sulfonamidoethanol. The test substance is correctly identified as N-methylperfluorooctane sulfonamidoethanol in the submission of the same study at AR226-1030a 075. Please feel free to contact me with any questions. Very truly yours, \ 06 Michael A. Santoro Director of Environmental Health Safety and Regulatory Affairs 3M Center, Building 236-1B-10 St. Paul, MN 55144 651-733-6374 (phone) 651-733-1958 (fax) E-mail: masantoro@mmm.com Enclosures cc: Dr. Jennifer Seed (w/o attachments) Mr. Charles Auer (w/o attachments) Dr. Oscar Hernandez (w/o attachments)