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Report No.

CrPe0ostwwonetuonPnRsPOlDsUCTS Wimagon Delswwe 9850071) May 31, 1991 AMrr.ionRobert Wilson 1Be1a0r0,GoDvEern1o97r01Lea Road Dear Bob: you eaErnlcileors.ed Tyhoeusewildlocufminedntscopgiievse aofstuhmemadroycuomfentthse Iexhfaauxsetd tgoas choamtposDuitiPoonntanodpevroalteudmetirnicFaierxfhiaeulsdt, raCTt.es Tfhreomteampceoraattiunrgestowtehrat Ftheinovzeonnezo1,nes530werdeegroepeesratFinign aztondeur2,ingantdhe730tesdtegvreeerse 1F80indezgorneees 3.

DuPont Legal 136, Anis. snot RECEIVE HEY23 jit gi se Ar2z2-177 May 25, 2004 Mary Dominiak U.S.

BACK TO MAIN BIODEGRADATION (Aerobic Soil and Sediment Cultures) 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 3M production lot number was 217 (TN-A-2130).

BACK TO MAIN Study Title Microbial Metabolism (Biodegradation) Studies of PerfluorooctaneSulfonate (PFOS) IV.

BACK TO MAIN CEntre Analytical Laboratories, Inc. 3048 Research Drive State C a ?

BACK BIODEGRADATION TEST SUBSTANCE Identity: Remarks: Perfluorooctanesulfonamide; may also be referred to as FOSA or F-10105 (1-Octanesulfonamide, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro, CAS # not available) FOSA was a light yellow waxy solid.

3M Specialty Materials 3M Center St.

1 RESEARCH Precise Research.

bSrRiPshT-6295.8, T-6316.4, T6868.2, T-7071.1, 7132.1 AR26-1. 8// 3M MEDICAL DEPARTMENT, CORPORATE TOXICOLOGY Title: Comparative Molecular Biology of Perfluorooctanesulfonate (PFOS, `T-6295), N-ethyl perfluorooctanesulfonamido ethanol (N-E(FOSE, T-6316), N-Ethyl perfluorooctanesulfonamide (N-EtFOSA, T-6868), Perfluorooctanesulfonamido acetate (FOSAA, T-7071), and/or Perfluorooctanesulfonamide (FOSA, T-7132)of in Rats and Guinea Pigs following Oral dosing.

Test Substance: Toxicological Summary Pros Dietary Acute Northern Bobwhite Study Perfluorooctanesulfonate (PFOS) Structure: Remarks: p1o-tOacstsaineusmuslaflot,niCcASa#cid2,7951,.13,92..32.3,3,4,4,5,5,6,6,7,7.8,8,8-heptadecafluoro-, The test substance is stored under ambient caonwdhiittieonpsoawndderpuGriMty wloats#o21r7g)i.nallTyhedestaemrpmlienewdatso bteechn9i0q.ue4s9.% determined Ibny 10 a LsCu/bMsSeq,uen'tH-aHnaMlRy,sis "oFf-tNhMeRestandsubcslteamnecnet,alpuraintaylwysaess be 86.9%.

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CLIENT ID: sakmp* Drn"*: Blank Data FS.name: Cd.