AR226-2483 July 16, 2001 CERTIFIED MAILRETURN RECEIPT REQUESTED Ms.

AR226-2621 \ ^ CWK PROJECT CLF LEACHATE SAMPLING 6/04 CLF LEACHATE SAMPLING 6/04 EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING EFFLUENT/RIVER SAMPLING.

AR226-2783 FOR DU FONT USE ONLY Copies to: Haskell E.

FOR DU PONT USE ONLY AR226-2938 Du Pont HLR 55-89 Study Title Statib Acute 96-Hour 1050* of to Fathead!

AR226-3136 TRADE SECRET Study Title H-24256: Skin Irritation Test in Rabbits Laboratory Project ID: DuPont-3606 AUTHOR: Deborah A.

AR226-3154 TRADE SECRET Study Title H-23960: Bacterial Reverse Mutation Test in Salmonella typhimurium and Escherichia coli Laboratory Project ID: DuPont-3828 TEST GUIDELINES: U.S.

AR226-3161 TRADE SECRET Study Title H-24042: Biopersistence Screening 10-Dose Oral Gavage Study in Rats Laboratory Project ID: DuPont-2931 AUTHOR: Carol Finlay, B.A.

AR226-3185 DuPont-4739 TRADE SECRET Study Title H-24616: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations Volume 2 of 5 Laboratory Project ID: DuPont-4739 TEST GUIDELINES: U.S.

AR226-3335 Datamemo Date: September 21,2000 To: Barbara S.

@ AR226-3349 Development of analytical methodology for determination of Telomer B Alcohols, Telomer-derived anionic, nonionic fluorosurfactants and polymers.

AR226-3368 Bacterial Respiration Inhibition Studies of Fluorotelomer- Based Products W.R.

DeterminationoftheWater Solubilitoyf PFOS by the Shake FlaskMethod WATER SOLUBILITY TEST SUBSTANCE Identity:Perfluorooctanesulfonatmea;y alsobe referredtoas PFOS or FC-95. (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 testsubstance isa whitepowder.

10/29/98 T-6295.16;DT-31 Low LzvelPFOS 3M MEDICAL DEPARTMENT, CORPORATE TOXICOLOGY Protocol for Study No.

REPORT EVALUATION OF THE ABILITY OF T-5869 TO INDUCE CHROMOSOME ABERRATIONS IN CULTURED PERIPHERAL HUNAN LYMPHOCYTES (WITH INDEPENDENT REPEAT) NOTOX Project 115943 NOTOX Substance 38196 page 1 of 26 - 9 T-5869 STATEMENT OF GLP COMPLIANCE NOTOX Project 115943 NOTOX B.V., Is-Hertogenbosch, The Netherlands The study described in this report was conducted in compliance with the most recent edition of: The OECD Principles of Good Laboratory Practice which are essentially in conformity with: The United States Food and Drug Administration.

MICROBICS MICROTOX@ TOXICITY TEST TEST SUBSTANCE Identity:Perfluorooctanesulfonylamido(ethyl)acemtaytea;lso be referredtoas PFOSAA, FC-128 or as the major component of FC-127, FC-129, FC-109, or FC-109-X.