Document 44ZpxEX5B4nGvBGDYLBoKkqDR

Larry R. Johnson DVM, Ph.D., DABT % Director AR 31M Corporate Toxicology and Regulatory Services \ 354- 3M Center, Building 0220-02-E-02 St. Paul, MN 55144-1000 651 733 9218 Office 651 733 1773 Fax lrjohnson@mmm.com Certified Mail June 10, 2003 Document Processing Center EPA East - Room 6428 Attn: Section 8(e) Office of Pollution Prevention and Toxics US EPA 1200 Pennsylvania Avenue NW Washington DC 20460-0001 RE: TSCA 8(E) SUPPLEMENTAL SUBMISSION: Docket No. 8EHQ-0602-00373 0603 - 002*73 Co, No C/ Dear Docket Coordinators: On May 16, 2003, 3M provided EPA with preliminary results from three ecotoxicity studies conducted on triphenylbenzyl phosphonium cation/N-methyl perfluorooctanesulfonamide salt (TPBP C8 amide). The final reports for these studies contain results that are consistent with the previously reported information. Enclosed please find the following three final reports: 96-Hour Acute Toxicity Study in Zebra-fish Acute Toxicity Study in Daphnia Magna 96-Hour Fresh Water Algal Growth Inhibition Test Please contact Susan Beach (651-778-7452) if you have any questions or if we can provide additional information. Sincerely, rss as no 07 ~zsvz no 07 fl. Larry R. Johnson Director, Corporate Toxicology and Regulatory Services Asr EP A -O TB 000811858V oooaiiasav CD CO PI cn ' V r ~ i 33W RECEIVED / 000001