Document 0LgrpqGq017yL3Jz7nNRJm2ax

3M C orporate Toxicology a id Regulatory Services 3M Center, Building 0220-02-E-02 St. Paul, MN 55144-1000 651 733 1773 Fax 3M Certified Mail September 8,2003 Document Processing Center 6PA East - Room 642 8 Attn: Section 8(e) Office o f Pollution Prevention and Toxics USEPA 1200 Pennsylvania Avenue NW Washington DC 20460-0001 RE: TSCA 8(E) SUPPLEMENTAL SUBMISSION: Docket No. 8EHQ-0602-00373 Dear Docket Coordini.tors: On October 30,2002,3M provided EPA with preliminary results from a oral combined repeated dose toxicity test with reproductive/development toxicity screening test on perfluorohexane sulfonate potassium salt (PFHS). The final report for this study contains results that are consistent with the previously reported information. Enclosed please find the following final report on CD Rom: Oral (Gavage) Combined Repeated Dose Toxicity Study o f T-7706 with the Reproductive/^Developmental Toxicity Screening Test Please contact John B itenhoff (651-733-1962) if you have any questions or if we can provide additional information. Sincerely, Larry R. Johnson Director, Corporate Toxicology and Regulatory Services Enclosure I bcc: Chri Kedrowidd - CT&RS - 220-2E-02 John Butenhoif- CT&RS - 220-2E-02