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ATTACHMENT TO LETTER OF 2/9/05 3M FLUOROCHEMICAL SUBMISSION BACK TO MAIN 3M FLUOROCHEMICAL SUBMISSION TOXICOLOGY, EPIDEMIOLOGY AND MEDICAL SURVEILLANCE PFOA Perfluorooctanoic Acid 1.

AR226-2065 WASHINGTON WORKS INDUSTRIAL HYGIENE REPORT FROM 1-Jan-I988 TO 3i-0ct-199i 31-0cfc-199i Page 1 AREA; FLUOROCARBONS - HOMOPOLYMERS CHEMICAL SAMPLE LOCATION *;CONTROL C-S/FC-143 104 P/S-FINE POWDER AUTOCLAVE OPER *: DATE!

M &SL& - 0 7 lf-lh TO XIC ITY TO AQUATIC PLANTS TEST SUBSTANCE_______________________________________________ Identity: A mixture containing perfluorooctanesulfonate; may also be referred to as PFOS, FC-95, or as a component of FC-203C and L-5440. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassium salt, CAS # 2795-39-3) Rem arks: The 3M production lot number was not noted.

TO XIC ITY TO AQUATIC PLANTS TEST SUBSTANCE Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FX-3103. (1Octanesulfonic acid) (CAS # 2795-39-3).

AR226-03MI TOXICITY TO AQUATIC INVERTABRATES (E.G., DAPHNIDS) TEST SUBSTANCE______________________________ Identity: N-Ethylperfluorooctanesulfonamide; may also be referred to as U1464, EtFOSA, EtPOSA, F-6309, or FX-12. (1Octanesulfonamlde, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8 ,8heptadecafluoro-N-ethyl-, CAS # 4151-50-2) Remarks: Material is a white solid, Lot 505 (cc842-3, F6309, L-1089).

BACK TO MAIN TOXICITY TO AQUATIC INVERTABRATES (Artemia sp) TEST SUBSTANCE________________________ Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks: The test substance is a white powder of uncharacterized purity.

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ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE Identity: Perfluorooctanesulfonylamido(ethyl)acetate; may also be referred to as PFOSAA, FC-128 or as the major component of FC-127, FC-129, FC-109, or FC-109-X.

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MICROBICS MICROTOX TO XIC ITY TEST TEST SUBSTANCE_______________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-206CE. (1Octanesulfonic acid) (CAS # 2795-39-3).

A R SlA 6 _ 0 8 7 / BIODEGRADATION (OECD 301D) I ES31SUB5TAMCE____________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-780B. (1Octanesulfonic acid) (CAS # 2795-39-3).