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LATHAM & WATKINS sein Ce een STR FYI-of 0o~ 1378 May 12,2000 Sp es, neREE, wn RE FY1-00-001378 ron II Aena BY HAND DELIVERY DiDrr.ecCthoarrles Auer Chemical Control Division OUfnfiitceed OSftaPtoellsutEinovnirPornemveennttaiolnPArontdecTtoixoincAsgency 401 M Street, Southwest WRaosohimn4g0t3o,n,EaDs.tCT. ow2e0r46(0Mail Code 7405) a =o fo Me ~3kc1 Re: 3M Company ~ Additional Information ~~ Conlin HC TBI On Perfluorinated Materials Dear Charlie: Pursuant to our earlier discussion, | am enclosing an analytical report from 3prMo'vsiednevditrhoenmsetnutdaylpmloannistaonridngotphreorgirnafomrmwahtiicohn hraesgaorndliyngjutshtisbepcroogmreamavauinldabelre.cov3eMr of ~~ =& the May 4, 2000 letter to you from Bill Weppner.

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1p. 31 October 2003 To: Mary F.

BACK TO MAIN 3M Environmental Laboratory Report No.

BACK TO MAIN STABILITY IN WATER (HYDROLYSIS) TEST SUBSTANCE Identity: Remarks: N-methylperfluorooctane sulfonamidoethanol; may also be referred to as 2(N-Methylperfluoroctanesulfonamido)-ethyl alcohol, N-MeFOSE Alcohol, FC-790, or FM-3925. (1-Octanesulfonamide, N-methyl1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-N-(2-hydroxyethyl)-, CAS # 24448-09-7). 3M production lot number was not noted.

BACK BIODEGRADATION TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or C8F17SO3-K+. (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) Remarks: PFOS was a white powder.

BACK BIODEGRADATION TEST SUBSTANCE Identity: Remarks: N-Ethylperfluorooctanesulfonamide; may also be referred to as NPFOSA, EtPOSA, F-6309, or FX-12. (1-Octanesulfonamide, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-N-ethyl-, CAS # 415150-2) N-EtFOSA was a white solid.

BACK TO MAIN BIODEGRADATION STUDY REPORT The Aerobic Biodegradation of N-EtFOSE Alcohol by the Microbial Activity Present in Municipal Wastewater Treatment Sludge Thursday, November 02, 2000 PROJECT NUMBER 3M Project ID: LIMS E00-2252 Pace Contract Analytical Project ID: CA058 Pace Proposal ID: 000511.1 PRINCIPAL ANALYTICAL INVESTIGATOR Cleston C.

3 M Company Psge 1 of 121 FINAL REPORT Epidemiology, 220-3W-05 Medical Department 3M Company St.