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<fpp> A t ZZ&-I88S Distribution of Serum PFOA Levels By Current Work Assignment Work Assignment Teflon SerumPFOA (ppm) Number in Median Group 259 0.494 Min 0.0174 Max 9.55 Research/Technical 160 Never assigned to Teflon 342 0.176 0.114 0.0081 2.07 0.0046 0.963 Assigned to Teflon at some point 264 Total Participants 1025 0.195 0.0086 2.59

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AR226-2457 WWK FC-143 RESULTS DATESMPL SRCNAME ANALYTE RSLTMOD IRESULT PQL UNIT 22-Nov-91 LOWER POND 22-Nov-91 UPPER POND 27-Dec-91 LOWER POND 27-Dee-91 UPPER POND 15-Mar-94 LMW-2A 15-M ar-94.LMW-5B 15-Mar-94 LOWER POND 15-Mar-94 STREAM MN RD 15-Mar-94 UPPER POND 20Sep-94 LMW-2A 20-Sep-94 LMW-5B 20-Sep-94 LOWER POND 20-Sep"94 STREAM MN RD 2-Apr-96 001 POND OUTLET 2-Apr-96 002 POND OUTLET 2-Apr96 003 POND OUTLET 2-Apr-9e2-Apr-96 MWBG OUTFALL 004 2-Apr-96 OUTFALL 005 2~Apr-96 STREAM 1 2-Apr-96 STREAM 2 2-Apr-96 W IL L 331 2-Apr-96 WELL 336 9-Apr~96 DWNSTREAM 9-Apr-96 OUTLET 9-Apr-96 PROPBOUND 10-Apr-96 FBLK 10-Apr-96 MW-12 10-Apr96 MW-S 10*Apr-96 MW12A 10-Apr-96 MW13A 1Q-Apr-96 MW13A PC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 1 0J9 1.3 4.1 260 1200 730 0.5 4400 270 530 2200 0.9 61 72 20 < 0.1 13 39 7.2 14 0.52 0.48 25 86 9.9 < 0,1 < 0.1 0.97 < 0.1 11 8,2 MG/L MG/L MG/L MG/L ug/t ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l 4 UG/L 4 UG/L 2 UG/L 0.1 UG/L 1 UG/L 2.5 UG/L 0.5 UG/L 1 UG/L 0.1 UG/L 0,1 UG/L 3 UG/L 20 UG/L 0.5 UG/L 0,1 UG/L 0.1 UG/L 0.1 UG/L 0.1 UG/L 1 UG/L 1 UG/L DATESMPL SRONAME ANALYTE RSLTMOD RESULT PQL UNIT 10-Apr-96 MW14 10-Apr-96 MW6A 11-Apr-96 FBLK 11-Apr-96 MW-4 11-Apr-96 MW-6 11-Apr-96 MW-9 11-Apr-96 WEST WELL 17-Apr96 FBLK 17-Apr-96 LMW-1 17-Apr-96 LMW-2A 17-Apr-96 LMW-7 17-Apr-96 LMW-8 FC-143 FC-143 FC-143 FC-143 FC-143 , FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 FC-143 < 0.1 0.19 < 0.1 39 15 0.14 3,7 < 0.1 1700 460 15 2200 0.1 UG/L 0.1 UG/L 0.1 UG/L 5 UG/L 2 UG/L 0.1 UG/L 0.5 UG/L 0.1 UG/L 200 UG/L 50 UG/L 2.5 UG/L 200 UG/L 66& .00M D EXD072360 17-Apr-96 LOWER POND FC-143 17-Apr-96 RT 33 STREAM SAMP FC-143 17-Apr-96 UPPER POND FC-143 18-Apr-96 MW-AJP FC-143 18-Apr-96 MW-MGM FC-143 18-Apr-96 MW-TWW FC-143 29-May-97 LOCAL LANDFILL W.

AR226-2459 From: Rik A Brandenburg on 05/26/99 09:14 AM CED To: Roger J Zipfel/AE/DuPont@DuPont cc: Seiichi Tanaka/PO/DuPont@DuPont Subject: Re: C-8 in drinking water | | Roger, W e have no data for c-8 in drinking water and a lot of data on C-8 in ground water.

AR226-2545 WVD045875291 DUPONT WASHINGTON WORKS RESPONSE TO EPA RFI WORK PLAN NOTICE QF DEFICIENCY (KOD) COMMENTS An NOD letter dated 1/15/98 concerning the 9/24/97 DuPont Washington Works RFI Workplan, was received from Region III EPA on 1/20/98.

RECYCLED CO cn AR226-2646 05/09 '02 13:51 ID:DUPONT ENV AFFAIRS FAX:1-804-383-3735 PAGE 2 AR226-2646 REPORT N O . t STT-91-1 DATE ISSUED} 01/16/92 COPY NUMBER} RICHMOND, VIRGINIA FIBERS DEPARTMENT SPRUANCE "TEFLON" TECHNICAL E.