ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may also be referredtoas PFOS, FC-95, or as a component of FC-600. (1-Octanesulfonicacid,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-p,otassium salt,CAS # 2795-39-3) Remarks: The 3M productionlotnumber was 2367.

ACTIVATED SLUDGE RESPIRATION INHIBITION TEST TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may alsobe referredtoas PFOS, FC-95, oras a component ofFC-3017. (1Octanesulfoniaccid)(CAS # 2795-39-3).

ANALYTICALREPORT Cc=ntrc=Analytical @*Nk ailL6a.boratoriFs, Inc. 3048ResearchDrive,StateCollegePA 16801- 814-231-8032 FAX 814-231-1253 AnalyticRaelsultWs2336 Columbus,GA 3M Sample Identification Sample Description PFOS (ng[L) MC-501 H MC-503H MC-506H NA MC-507H NA MC-508H MC-584H NA Site1 P/N SurfaceWater 63.8 SiteI P/N SurfaceWater Duplicate 59.9 Site2 P/N SurfaceWater 76.6 Site2 PIN SurfaceWater Duplicate 83.3 Site3 P/N SurfaceWater 55.4 Site3 P/N SurfaceWater Duplicate 55.4 FieldBlank-P/N Empty < 25 QuietSurfaceWater < 25 Quiet SurfaceWater Duplicate < 25 i - Compound ispresent,but below thereportinglimiotf 25 ng/L.

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35) Discussion of the hydrolysis of PFBS SANITIZED ..+ DEC 0 9 2003 Discussion of the Rate of Hydrolysis Perfluorobutane Sulfonate 1 'j3M Environmental Laboratory, St Paul, MN, 7/22/02 Based on hydrolysis studies of perfluorooctanesulfonate (PFOS) and the mechanism of hydrolytic decomposition of sulfonates, it is a reasonable proposition that/-k'FBqis as resistant to hydrolysis as PFOS.

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Fraunhofer ITEM Fi nal R ep ort 0 1 G 0 0 0 0 2 [Appendices A-D ] 28 Day Repeated Dermal Contact Study of 3M Test Articles in Sprague-Daw ley Rats P ag e 1 of 5 6 _____________________________________________________________________________________________________________ Appendix A: T es t S a m pl e R e-a na l y s is [p e r f o r m e d b y 3 M ] Fraunhofer ITEM Fi nal R ep ort 0 1 G 0 0 0 0 2 [Appendices A-D ] 28 Day Repeated Dermal Contact Study of 3M Test Articles in Sprague-Daw ley Rats P ag e 2 of 5 6 _____________________________________________________________________________________________________________ Appendix A1: 1st T e s t S a m p l e R e -a n a l y s i s In te rn a l C o rre s p o n d e n c e 3M TO : J o h n B u te n h o ff N ovem ber 14,2000 FRO M : Fred L.

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