Document 6GbyK1Nn862J4VkZDbvYgZDg

r Katherine E. Reed, Ph.D. Staff Vice President 3M Environmental, Health and Safety Operations p. 1 900 Bush Avenue, Building 42-2E-26 PO Box 33331 " St. Paul, MN 55133-3331 651 778 4331 '1 3M ipp- Certified Mail ^ (T 37f3 August 1, 2007 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 NO CBI Re: TSCA 8(e) Substantial Risk Notice: Supplemental to Docket No. 8EHQ-0598-373; Sulfonate-based and Carboxylic-based Fluorochemicals To whom it may concern: 3M is submitting this notice to supplement its previous submissions on sulfonate-based and carboxylic-based fluorochemicals. 3M has received data from the MN Pollution Control Agency (MPCA) showing detectable levels of perfluorooctanoic acid (PFOA) in a small sampling of residential wells (less than 20) located in a discrete location near the 3M Cottage Grove production facility in the city of Cottage Grove, MN. The report provided by the MPCA is, at this time, incomplete. Once a final report is available, it will be forward to the EPA. If you have any questions or need additional information, please contact Deanna Luebker at (651)737-1374. Sincerely, . '/ tsc fP fisP ) Katherine E. Reed Staff Vice President, Environmental, Health and Safety Operations 89070000441 e / '20(0246