Document nnpybY83gjEew9n0GY5V362a

3M 3M Specialtfyvlaterials 3M Center St Paul,MN 55144-1000 6517331100 May 15,2000 F8-07?1821117622 I Dr. CharlesAuer Director Chemical ControlDivision OfficeofPollutioPnreventionand Toxics United StatesEnvironmental Protection Agency 401 M Street,Southwest Room 403 East Tower (Mail Code 7405) Washington, D.C. 20460 F@dExTraclunNgumber forCustomer RE: Supplemental Information on Perfluorooctane Sulfonates Dear Charlie: 3M isenclosing additionalinformation on perfluorooctane sulfonatesto supplement our submittal dated May 4, 2000. The supplemental information consistsof the following- 1 . Four pages of executive summaries that were included in the May 4, 2000 submittal as introductionsto the environmental science areas. However, our cover letterto you of May 4 also indicatedthatwe would provide copies as partof the cover letter.We inadvertentlyfailedto include them as partof the attachments to the cover letter,and do so now. 2. A summary entitled"26-Week Capsule Toxicity Study with Perfluorooctanesulfonic Acid Potassium Salt (PFOS) in Cynomoigus Monkeys, Current Summary as of May 4, 2000." Itisour understanding thatthissummary was hand-delivered to you by Dr. Larry Zobel at a recent meeting between 3M and EPA, but we supply another copy to complete the filing. 3. The cover page to the resubmittalof confidentialinformation previously submitted on May 4. We inadvertentlyfailedto provide both a sanitizedand confidentialcopy, and Terry O'Brien asked thatwe resubmit thisinformation to the Document Processing Center. Please do not hesitateto contact me at 651-733-6374 should you have any questions. Very trulyyours, William A. Weppner, Ph.D Director of Environmental, Health, Safety & Regulatory Affairs SpecialtyMaterials Markets 3M Center, Bldg 2'36-IB-10 St.Paul, NIN 55144-1000