ARa%-olHl 3M MEDICAL DEPARTMANT CORPORATE TOXICOLOGY To: John Butenhoff Andrew Seacat From: Marvin Case Date: 5 April 2000 Subject: Liver Slide Review I have completed my microscopic review of the liver sections of the 14-week sacrifice rats on the PFOS chronic study.

A R 1 2 C - 0 1 ^Attachments to Letter to C.

C O R N IN G Hazleton MUTAGENICITY TEST ON T6358 MEASURING CHROMOSOMAL ABERRATIONS IN CHINESE HAMSTER OVARY (CHO) CELLS FINAL REPORT AUTHOR Hemalatha Murli, Ph.D.

O Primedica Argus Division j 905 Sheehy Drive, Bldg.

AR226-1030A032 BACK TO MAIN Fluorochemical Decomposition Processes - April 4,2001 David A.

Internal Correspondence BACK TO MAIN Commercial Chemicals Analytical Report #245 To: M.

ENVIRONMENTAL PHYSICAL/CHEMICAL, FATE, EFFECTS AND MONITORING STUDIES Potassium Decafluoro(pentafluoroethyl)cyclohexanesulfonate back to compounds STUDY TITLE Environmental FateandTransport Ready biodegradation of FC-98 (BO D /C O D ) Ready biodegradation of FC-98 (BO D /C O D ) Ecotoxicity Elements 96-H our acute static toxicity to fathead m innow - FC-98 96-H our acute static toxicity to fathead m innow - FC-98 Toxicity to activated sludge - FC-98 LABORATORY OR DATE AUTHOR COMPLETED TYPE 3M Environm ental Lab 3M Environm ental Lab 9/4/72 7/14/77 Robust summary, copy of laboratory data sum m ary Robust summary, copy of laboratory data sum m ary 3M Environm ental Lab 3M Environm ental Lab 3M Environm ental Lab 1/17/75 8/26/77 3/11/80 Robust sum m ary, copies of raw data sheets Robust sum m ary, copies of raw data sheets Robust sum m ary, copies of raw data sheets

BACK TO MAIN DESIGN AND STRUCTURE OF MULTI-CITY STUDY submitted to 3M Environmental Laboratory 935 Bush Avenue St.

Internal Correspondence B A C K TO M AIN t, Commercial Chemicals Analytical Report #247 To: M.

BACK TO MAIN ACUTE TOXICITY TO AQUATIC INVERTEBRATES (DAPHNIA MAGNA) TEST SUBSTANCE_____________________________________ Identity: Perfluorooctanoic acid, tetrabutylammonium salt; may also be referred to as PFOA tetrabutylammonium salt, tetrabutylammonium perfluorooctanoate, N2803-2 or as a major component of L-13492.

3M General Offices 3M Center St.

STUDY CODE : K01-1802 A R 1 2 S -O I3 C Receipt No.

RECEIVED OPPTNCIC 20084U6 -3 PH 2' 38 AR Z-Zb - 061S' f U\81uI,J\ *\<!

ARAZ6 _ 07& 3 ACUTE TOXICITY TO FISH (MUMMICHOG) TEST SUBSTANCE____________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-206 or L3243. (1-Octanesulfonic acid) (CAS # 2795-39-3).

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