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AR226-2097 Test R,, esul,ts Sample Date Range Concentration Range Action Level Industrial.Hygiene 1/1/97 12(31/97 100% Sample Dt Sample* Duration Type Emptoyee Name BTO; 07 TECHNICAL HOC: 252 BLDQ.3-QEN6RAL 6/25/97 6890 390 A Pers Chemical OWC-143 BTO; 08 TEFLON lOC; MS BLDG. 162 ROOF- GENERAL 7007 7137 362 A 7/EKI7 7138 362 A 7/2107 7139 7C1/97 7219 370 A 371 A 7/21/87 72 368 A 7/2207 7140 370 A 7/22B7 7220 374 A 7/22/97 72% 375 A 7/22S7 7232 384 A 7/2387 7141 7/23B7 7221 386 A <100 A 703(97 7227 374 A 7/23897 7233 331 A 7/24(97 7142 362 A 7/24(97 7222 381 A 7/2497 7228 338 A 7/247 7234 7C5S7 7223 7<2S(97 7229 366 A 354 A 351 A 7/25(97 7235 351 A 7C9S7 7230 8(507 7224 378 .A 378 A ?

AR226-2276 Privileged and C Draft Attorney Wo Figure 2 Privileged and C Draft Attorney Wo 4348500-1 4348000-4 4347500-^ 11l 11 1111 11 ++++++++++ + + + + + 4-4-4-4-4-4-4-4-4-+ + + + + + + + + + + + + 4-4-4-4-4-.+4-4-4-4- + + + + + + + + + +4-4- + ++ +++ + 1 + + + + 4- ++++++++++ + + + + +++-++++ + + + 4- + ++++++++++ + + + + +++-++++ + + + + 4-4-44-4-4- ++++++++++ ++++++++++ + + + + + + + + +++-++++ + + + + + 4-4-4- ++++++++++ + + + + + + + + + 4-4-4- ++++++++++ + + + + + + + 4347000-4 4346500H .

AR226-2458 t > i FT"-^ r'" i j Stephen Opp 05/17/99 01-.40 PM To: cc: Subject: Roger J 2ipfel/AE/DuPont@DuPont, Robert L Ritchey/CL/DuPont@DuPont Andrew S Hartten/AE/DuPont@DuPont Washington Works Groundwater Results Summary Tables Roger and Bob; Attached you will find a spreadsheet that summarizes the 2 groundwater sampling events at Washington Works.

AR226-2648 38 ^ ff ^ H- AR226-2648 TECHNICAL REPORT IN-SITU TREATMENT OF SURFACTANT-CONTAMINATED AQUIFER BY ELECTROCHEMICAL PROCESSES submited to Du Pont Company and Delaware State Research Partnership March, 1994 by 0 C.

AR226-2686 CO AR226-2686 Perfluorinated Surfactants 'Dupont / UvA / RIKZ Meeting, 07-05-200; "Perfluorinatecr" surfactants A desk study on the use and environmental effects of perfluorinated surfactants in the Netherlands Floris Hekster & Pirn de Voogt A desk study commissioned by the Dutch Ministry of Transport, Public Works ____ ____ ___and Water Management ____ EID676803 Perfluorinated Surfactants 'Dupont / UvA / RIKZ Meeting, 07-05-2002 Outline of the presentation -y Goals ne ble of contents report / Methodology Available knowledge Remaining questions/ uncertainties A desk study commissioned by the Dutch Ministry ot Transport, Public Wolks ____ __ and Water Management ______ ___ EID676804 Perfluorinated Surfactants ' Dupont / UvA / RIKZ Meeting, 07-05-20 The study has three major goals 1.

AR226-3004 .

PHOTODEGRADATION TEST SUBSTANCE Identity:Perfluorooctanesulfonatmea;y alsobe referredto as 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: Testingisinprogress.

BODICOD resultstorFC-94-X (U sWt ofPFOS) I BIODEGRADATION TEST SUBSTANCE Identity:PerfluorooctanesulfonatLei,thiumsalt;may alsobe referredto as PFOS Lisalt,FC-94, or FC-94-X. (1-Octanesulfonicacid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecaflliutohriou-ms,alt, CAS # 29457-72-5) Remarks: The testsample isa mixtureofthe testsubstance inwater (approximately24.5% testsubstance and 75.5% water).No calculations were made to adjustforthe actualconcentrationofthe testsubstance in the testsample.

I I 96-Hour Acute T DEA saltof PFO ACUTE TOXICITY TO FISH TEST SUBSTANCE Identity:PerfluorooctanesulfonatDeE,A saltm;ay alsobe referredtoas PFOS DEA salt,FC-99, or3M Sample No. 2. (1-Octanesulfonic acid,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafcloumoprdo.-, with,2,2'-iminobis[etha(n1o:l1]),CAS # 70225-14-8) Remarks: Test sample isa mixtureofthetestsubstanceinwater (approximately25% testsubstance and 75% water).Allvaluesreported relatetothismixture.No calculationwsere made toadjustforthe actual concentration,otfhe testsubstance inthetestsample.

25/JUN2.5.1999012:41PPMCFIIIEDI2C2A0L@E 0)<EN,WOLITER-q E?

AR226_ 343 38 00037 ~ .

mL Hi -~ ~ t ARARE _ DUE 52 000428 d ARRRE_ IY WW C-8 BLOOD ANALYSES (NON-FLUOROCARBON EXPOSURE) | TIME ON PLANT NOT | IN FLUOROCARBON | NUMBER OF AREAS BEFORE | PEOPLE BLOOD ANALYSES 14 9@ 3 8 MONTHS 2 YEARS 1 4 YEARS 1 7-1/2 YEARS AVERAGE C8 IN BLOOD (PPM) 0.027 0.020 0.034 0.022 ] BD [rr -- || 000429

esnencd L N) we'd #0 \ # Anca. meron PFOAPFOSAnalysis Lot#: D8A170279 ' NWTe iololmiamtnhGn reennbniiellrne Tomer Den oia led etn 208 Neuen rst AnhCONOR TOS BAI rms oee2sows.oomna Table Of Contents Standard Deliverables Report Contents (TShtoaRnedpaorrtdCoDveelrpiavgeoraibclonessidaredannogral artofthis `lStlapnadgaersdiDnedlivceartaedbilnophacskTaagbel. oTfhCs roeponrtastroceonmcnupceettd)niss + Table of Contefts Case Narrative Executive Summary - Detection Highlights + Methods Summary * Method/Analyst Summary LotSample Summary Analytical Results QC Data Association Summary + aC Results + Chain-of-Custody Sample Receiving Checklist Total Number of Pages Testamerica 1 DEP2.SDWB-000075 CasDeeANIa7r0r2a1t9ive "QTunealriesMualnsuianlc.luAdeldeisnutlhtiss hreapvoertbheaevefboeunedn1roevmieeewtedalforrecqoumirpelmieanntcseowfilNh EthLeALaabonrdaatonryy `exceptions are noted below. o"Trhisspornespoorrt.shDalilonont bfaeciroerpsroadnudceodineoxtceepsthianvuel,bewietnhopurtovtihdeewd ioneneaacphpdroavtaalshoefetth folaasbsoirsattoinry he merpretaion ofth resuls.