AR226-2134 C o CL QZ J m Xd) e> (T i\ o rsi o rH o' H rM 0vPs vCT* 0sps I O N KO CM t -H h Comparison of DuPont with C COL C3 clnn -sO sP 0s o'- o" rCNoI ii--nI nt--I os O'00 ^K0sDa ' VD (N vjD CD Zc/>> OLL X*CrD:3 CD -CMO CL E < LU X<Ju w X3 C mV(WD) X(U t3j U O PQ ro q , 4c-n1 Cr l- cu OJ - Dei Q CONFIDENTIAL This document is 1 subject to restriction by order o f the Circuit Court of Wood County, West Virginia, Case No. 0 1-C-608, and may not be copied or disseminated except by Order of the Court.

iK iid / <uJ4f~ZH, I Based on RAGS (Superfund) guidance, Exhibit 6-11 Intake (mg/kg-day) = CW x IR x EF x ED ^ BWxAT !

AR226-2408 INTEROFFICE MEMORANDUM Date; From: Dep t : Tel N o : 6-Apr-1390 01:06pm Peter .D.Spohn SPOHNPD PPD--SPD 863-4732 TOs William E.

AR226-2434 t.fc BRANDERA AT A1 AT EU0IS2 02/18/94 02:27 PM To- RIETBRG AT A1 AT EU0IS2 , HUISMAW AT A1 AT EU0IS2 , QUARLES AT A1 AT WWPS , NISHIKAY AT A1 AT WWPS , AREA AT A1 AT YOVXOO , SAWATAI AT A1 AT YOVX00 , PRIMUSCJ AT A1 AT WWPS , 2IPFEL AT A1 AT WWPS cc: YOKOYAK AT A 1 AT YOVXOO Subject: First draft C-8 sampling + analysis procedure Tor see distribution list FromsR.A.

^Precise Research. \ Proven Results AR226-2501 Analytical Report Fluorochemical Characterization of Water Samples DuPont Washington Works Exygen Resareh Laboratory Report No. 008-046B {Revision 1) Testing Laboratory .

AR226-2624 RECYCLED AR226-2624 JULY 2004 PFOA SAMPLING DUPONT CIRCLEVILLE WORKS CIRCLEVILLE, OHIO Date: August 2004 Project No.: 18984003.04005 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 July 2004 PFOA Sampling Introduction On July 8,2004, groundwater was sampled from two recovery wells and three production wells at the DuPont Circleville Plant.

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15:8 vW ^ EPA/Fluoropolymer Industry Meeting I Introductions I Meeting Purpose I Introduction to the Fluoropolymer (FP) Industry I Fluorinated Processing Aids (APFO/PFOA) in Fluoropolymers I Discussion & Feedback ^ o-r-j mo Meeting Purpose I Provide Overview of FP Industry I Who, What, How, Critical Uses I Open Communication Channels I Describe What Industry Is Doing I Determine EPA Expectations & Plans I Regulatory Actions I International Coordination I Discuss Next Steps Contain NO GBi / S o cie ty of the P la s tic s Industry (SPI) Fluoropolym er M anufacturers Group (FMG1............ ............. _ _ , I A Special Purpose Committee of the SPI I The mission of the FMG is to promote the continued safe manufacture & use of fluoropolymers made using fluorinated polymerization aides (FPA) while establishing & supporting responsible care in the use of fluoropolymer products & minimizing the impact on the environment FMG Objectives for Meeting I Illustrate Necessity of the Continuing Safe Use of APFO I Demonstrate Industry's Safety & Health Awareness I Identify EPA Concerns FMG Members I Asahi Glass Fluoropolymers I Atofina I Ausimont I Daikin I DuPont & DuPont/Dow Elastomers I Dyneon (a 3M Company) Fluoropolymers & PFO Chem istry I APFO Vs.

3 GLP10-01-02 Interim Report 25: Analysis of PFOS, PFHS and PFBS in Sediments Collected from the Jeffries Property Study Title 3M Environmental Laboratory Analytical Protocol GLP10-01-02: Analysis of Perfluorooctane Sulfonate (PFOS), Perfluorohexane Sulfonate (PFHS) and Perfluorobutane Sulfonate (PFBS) in Groundwater, Soil and Sediment for the 3M Decatur Phase 3 Site-Related Monitoring Program Data Requirement EPA TSCA Good Laboratory Practice Standards 40 CFR Part 792 Study Director Jaisimha Kesari P.E., DEE Weston Solutions, Inc. 1400 Weston Way W est Chester, PA 19380 Phone: 610-701-3761 Principal Analytical Investigator Cleston C.

INTERIM REPORT # 17 - Analysis of Sediment and Water Samples SAmPenaralflllyuMsoiasromoomfcPtaaelnrLeflsiuvuoelfrrooanbnaudtteaSn(mePsFaulOllfSMoM)naaSiomntTnemWiUt(oPaDarlFtiYenSBrge,STrPS)uI,ormToPilLge,UrrESafslmeiundogirmoLehCne/txM,aFnSies/Mshu,SlCfoflnaomarttesh,e(VP3FeMgHeStDa)t,eicoaanntd,ur EPA TSCA GooDd ALaTbAorRatEorQyUPIraRcEtiMceESNtaTndSards 40 CFR 792 JaWWiSPseTih1emsoUts4nht0CDoea0nh:YKeW6SseD1toese0lIasru-Rtr,7otiiP0EnoP1ACn.W-Es3T,1.7a,9OI6ynD31Rc8E.0E INTERIM REPOJuRneT2C9,O2M00P7LETION DATE PERFSOtP3ahR0tEeo5Mxn8CyeIoR:gNlee8lGens1ge4ReaL-,re2AcPs7heBA2aD-Or1c1rR0hi6v38Ae90T1ORY 3MSBTuUi3lMDdiYnCgSo0Pm2Op3a6Nn-S0yO1-RB-10 PShto. nPea:u6l,5M1-7N335-56134744 ExyPgroetnocSotulPdNyRuNOmuJbmEerCb:eTPr:0P0001010311131 Total Pages: 127 Interim Report #17 - Analysis of Sediment and Water Samples Exygen Study No.: P0001131 GOOD LABORATORY PRACTICE COMPLIANCE STATEMENT UPECSSeetxosardiymnfnigldmgpueaaonernrnLdoSytsC,h,tu4e/iFMd0xsiyasbCSnhNe/Fe,MiusnRCumgSll7fabp9omeef2norrsafrbP,toye0rVtm0hE(eP0eexg1Fdye1Hg3ti3aeMnS1tni),co,RoenDanme,nsteipdSectlalmaiePratdcuaenhlrr"cl.fAelMMunwoaaorilmotnyhoismtcioEstarPailonnAfeLgPsiTuvePSlreffrCrolounAgaoanrrtaGdoembo(S,uoP"mtdFanaOcLleolSasnb)uMdoliufranoacmnttWoeamdrtyaeatleP(fPorrS,raFecSBrt3ouiScMim)le,, PErxiyngciepnaRl Iensveeasrctihgator JWSatiuesdsitmyoDnhaiSrKeocleutsotairorinPs,.EIn.

BIODEGRADATION A R22-0057 FT--3 TEST SUBSTANCE_______________________________________________ Identity: Periluorooctanesulfonate; 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) Rem arks field: The test substance is a white powder of uncharacterized purity.

3M Medical Department Study: T6316.5 Analytical Report: FACT TOX-013 LRN-U2095 Study Title Analytical Study 2(N-Ethylperfluorooctane sulfonamido)-ethanol in Two Generation Rat Reproduction Analytical Laboratory Report Title Determination of the Presence and Concentration of PFOS, M556, PFOSAA, and PFOSA in the Liver and PFOS, M556, PFOSAA, PFOSA, and EtFOSE-OH in the Sera of Crt:CD*BR VAF/Plus* Rats Exposed to EtFOSE-OH Data Requirement Not Applicable Author 3M Environmental Laboratory Study Completion Date At signing Performing Laboratories Sera Analyses Liver Analyses 3M Environmental Laboratory Building 2-3E-09, 935 Bush Avenue St.

3M Medical Department Study: T-6295.12 226-1030A004 BACK TO MAIN Analytical Report: FACT TOX-110 LRN-U2849 Study Title Oral (Gavage) Pharmacokinetic Study of PFOS in Rats Analytical Laboratory Report Title Determination of the Presence and Concentration of Perfluorooctanesulfonate (PFOS) in Serum, Liver, Urine, and Feces Samples Data Requirement Not Applicable A u th o r 3M Environmental Laboratory Study Completion Date at signing Performing Laboratories Urine Analyses Feces Analyses 3M Environmental Laboratory Building 2-3E-09, 935 Bush Avenue St.

BACK TO MAIN Centre Analytical Laboratories, Inc. 3048 Research Drive State College, PA 16801 www.centrelab.com ^P hone: (814) 231 -8032 Fax: (814) 231 -1253 or (814) 231 -1580 Analytical Report Fluorochemical Characterization of Surface Water Samples Columbus, GA (W2336) Centre Analytical Laboratory Report No. 023-014E (Revision 1) Revision Date 3/22/01 Testing Laboratory Centre Analytical Laboratory, Inc. 3048 Research Drive State College, PA 16301 3M Environmental Laboratory Contact Kent R.