BACK TO MAIN SOIL ADSORPTION (METHOD DEVELOPMENT) TEST SUBSTANCE Identity: Perfluorooctanoic acid, ammonium salt; may also be referred to as PFOA ammonium salt, Ammonium perfluorooctanoate, PFO, FC-116, FC-126, FC-169, or FC-143.

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3M Medical Department Study: T-6889.3 3M Medical Department Study: T-6889.3 Analytical Report: FACT-TOX-026 LRN-U2782 Analytical Report: FACT TOX-026 LRN-U2782 Study Title 26-Week Capsule Toxicity Study with Ammonium Perfluorooctanoate (APFO/POAA) in Cynomolgus Monkeys Amended Analytical Laboratory Report Title Determination of the Presence and Concentration of Perfluorooctanoate Fluorochemical in Liver, Serum, Urine and Feces Samples Data Requirement Not Applicable Author 3M Environmental Laboratory Analytical Phase Completion Date Juant seig1n1in, g2001 Performing Laboratories Liver, Serum and Urine Analyses Feces Analyses 3M Environmental Laboratory Building2-3E-09, 935 BushAvenue St.

AR226-1486 ENVIRONMENTAL AND HEALTH ASSESSMENT OF PERFLUOROOCTANE SULFONIC ACID AND ITS SALTS August 20, 2003 Prepared by 3M in consultation with Jack Moore, D.V.M., DABT, Hollyhouse, Inc.

SOIL ADSORPTION - REVISED TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1Octanesulfonicacid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassiumsalt, CAS # 2795-39-3) Remarks: The test substance is a white powder.

ENCLOSURE 4 Description of the 3M Decatur Inactive Landfill Containment Structure At the 3M Decatur site, a RCRA interim remedial measures (IRM)program is currently underway to construct a containment structure for an inactive landfill.

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- - - PFOS: A PILOT REPRODUCTION STUDY WITH THE NORTHERN BOBWHITE FINAL REPORT WILDLIFE INTERNATIONAL,LTD.

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AR226-2081 WASHINGTON WORKS INDUSTRIAL HYGIENE REPORT PROM l-Jan-1994 TO l-May-1995 3-May-1995 Page 1 AREA: FLUOROCARBONS - HOMOPOLYMERS CHBMICAIi SAMPLE LOCATION *:CONTROL C-8/FC-143 003 FINE POWDER PACKOUT ROOM DATE: 27-Jan-1994 NOTEBOOK; TTF01.P398 DURATION: 370 COMC: <.03 MPB SAMPLE TYPE: P PERCENTAGE: 5% EMPLOYEE #04500 PERS CODE: 08PJ C-8/FC-143 008 P/S - FINE POWDER PACKOUT DATB: 27->Tan-1994 NOTEBOOK; TTF01,P399 DURATION: 375 SAMPLE TYPE: A CONC: <.03 MPB PERCENTAGE: 5% EMPLOYEE #00000 PERS CODE; C-8/PC-143 008 P/S - FINE POWDER PACKOUT DATE: 25-Aug-1994 NOTEBOOK; TTF01,P428 DURATION: 390 CONC: <.03 MPB SAMPLE TYPE: P PERCENTAGE: 5% EMPLOYEE #04632 PERS CODE; 08PJ C-8/FC-143 008 P/S - PINE POWDER PACKOUT DATE: 8-Mar-1995 NOTEBOOK: TTF01.P454 DURATION: 405 COMC: 0.02 MPB SAMPLE TYPE; P PERCENTAGE: 4% EMPLOYEE #04632 PERS CODE: 08P C-8/FC-143 008 P/S - FINE POWDER PACKOUT DATE: 8-Mar-1995 NOTEBOOK: TTFOl,P454 DURATION: 405 CONC: 0.02 MPB SAMPLE TYPE: P PERCENTAGE; 4% EMPLOYEE #04632 PERS CODE: 08PJ C-8/FC-143 017 ROOF AREA-GENERAL DATE: 28-Jan-1994 NOTEBOOK: TTF01,P404 DURATION: 380 CONC: <.03 MPB SAMPLE TYPE: A PERCENTAGE; 5% EMPLOYEE #00000 PERS CODE; C-8/PC-143 031 INSIDE P.P.

AR226-2113 -r----.

AR226-2215 ' Date Is based on testing conducted at the Washington Works site in September, 1996. b Particulata scavenging coefficients for liquid precipitation are from Figure 1-111n the EPA ISO Users Guide (Volume li).

AR226-2313 y David M Rurak 03/16/2003 07:01 PM To: cc: Subject: Catherine A Barton/AE/DuPont@DuPont Martc C Hause/DuPontQDuPont.

AR226-2341 FL^oP^M^S.

AR226-2377 X-** HCT.