3M Medical Department Corporate Toxicology 3M Center, Building 220-2E-02 St.

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Eiviraimeitaif News AR226-1529 Potential explanation for fluorinated compounds' persistence The first assessment of the atmos pheric lifetime of an important class of fluorinated chemicals, ducers.

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RECEIVED PFOS Ecotoxicological Testing Results OPlfyffQpprison of Effect Concentrations Calculated Using Different Sample Purity M H M rr^an {n fasured concentrations, except where * (nominal).

LABORATORY-SCALE THERMAL DEGRADATION OF PERFLUOROOCTANYL SULFONATE AND RELATED SUBSTANCES 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).

TOXIKON FINAL REPORT: 01-7019-G1 CHO/HGPRT FORWARD MUTATION ASSAY - ISO (T-6889.7) Author Devaki Sadhu, Ph.D.

Larry K.

ildlife International, Ltd ECOTOXICOLOGY & ANALYTICAL TESTING SERVICES November 27,2000 Ms.

Andrew Seacat 04/28/04 01:44 PM To: Melinda M.

Katherine E .

3M General Offices Certified Mail 3M Center St.

Hollvhouse Inc PO Box 474 1771 Sandy Point Rd.

H18636: Slide Review of pancreas lesions from DuPont APFO Study Date of Review: 28thNovember 2001-11-29 Reviewing Pathologists: Dr E E McConnell and Dr J R Foster Study No: HN-18636 Study Title: Combined Chronic Toxitity/Oncogenicity Study with Linuron, C8 and W yl4,643.

A R t t r O 3f l0 ACTIVATED SLUDGE RESPIRATION INHIBITION TEST TEST SUBSTANCE Identity: Perfluorodecanesulfonate, ammonium salt; may also be referred to as PFDS, FC-121-X, or 3M Sample E2112 and E2566-1. (1Decanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heneicosafluoro-, ammonium salt, CAS # 67906-42-7) Remarks: Test sample is a mixture of the test substance in water and 2propanol, 1-(1,1-dimethylethoxy).