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AR226-2417 SAMPLE r-R SAMPLE SUMMARY: 11/90 TO PRESENT -------- p t 9/i37fir DATE SAMPLED RESULT PPB C-8 STATUS 1.

AR226-2778 FOR DU PONT USE ONLY E.

AR226-2828 Copies to: Han.

AR226-3062 DuPont HLR 902-96 naaver.T.

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M U - 3 30*1 /V/U ai- 230J D u p on t-13542 FINAL REPORT Study Title H-24768: In Vitro Mammalian Chromosome Aberration Study in Human Peripheral Blood Lymphocytes Authors Ramadevi Gudi, Ph.D.

Northwest Bioanalytical A H & 8 l6 - >A I J L Study No.

Arrrg~ iH-sy Jah, 2 99 02: 02p DuPont-Chasbers Werks 609-540-4654 p .2 CC: B.

.Wildlife International Ltd. -1 - Project Number 454A-1Q2 PFOS: A 96-HOUR STATIC ACUTE TOXICITY TEST WITH THE FATHEAD MINNOW (Pimephales promelas) ADDENDUM WILDLIFE INTERNATIONAL, LTD.

AR226-2083 C-8 SAHPLIH6 PROJECT PA6E 1 OF 41 SUHHARY OF SPECIAL C-8 SAMPUN6 PROJECT Jennifer Nichols Environmental Lab LSE 9-16-97 EID093252 KID137016 RJZ021182 '.I C-8 SAMPLING PROJECT PAGE I OF 41 TABLE OF CONTENTS - PASE TITLE PAGE........... .................... ......... 1 TABLE OF CONTENTS.................................. 2 INTRODUCTION ....................................... 3 SUMMARY OF AIR MONITORING........................... 4 SUMMARY OF WIPE SAMPLING............................ 5 ATTACHMENT 1: AIR SAMPLING RESULTS ............ ..... . 6 SUMMARY OF AIR SAMPLING PATHSFORWARD.................. 24 ATTACHMENT 2: INVESTIGATION OF HVAC UNITS............. 26 ATTACHMENT 3: SURFACE WIPE SAMPLING RESULTS ........... 30 WIPE SAMPLING CONCLUSIONS/PATHSFORWARD............... 36 FIGURE 1: ROOF HVAC SAMPLING LOCATIONS (AIR) ........... 37 FIGURE 2: ROOF SAMPLING LOCATIONS (WIPE) ........... 38 FIGURE 3: PERCENT RECOVERY OF WIPE SAMPLES........... 39 FIGURE 4: AVERAGE VALUES AT ROOF LOCATIONS........... 40 REFERENCES ......................................... 41 RJ202J183 EID093253 EID137017 C-8 SAMPLING PROJECT PAGE 3 OP 41 In response to the Summary of 1995 C-8 Blood Testing (Playtls, 1995) results, and subsequent 1996 Industrial Hygiene Follow-up Report (Playtls, 1996), an extensive sampling campaign for C-8 in air and on surfaces (wipe testing) was conducted in Teflon* areas.

AR226-2706 28 AR226-2706 Society of Environmental Toxicology & Chemistry Summary of DuPont Presentations North American World Congress November 13-18, 2004 Portland, OR Biotransformation of ,4C-labeled Fluorotelomer substances by microorganisms from activated sludge or soil.

% AR226-2873 Copies to E.

AR226-3146 DuPont-4003 HASKELL LABORATORY FOR TOXICOLOGY and industrial m ed icin e H-243T9O0:FSATTAHTEIACD, AMCIUNTNEO9W6-SH, OPiUmRepShCaRleEs pErNoImNeGlasTEST PURPOSE: Ttheisst cisoancreanntgreaftiinodnisnagnsdtuddaytadmeseiagsnuerdemtoepntrsovaitdpereadneetesrtimmianteedoifntaeqruvaatlisc. toxicity using fixed GENERAL INFORMATION MPSUDRSITNYo:: nEoletcptrroovniidceMd SoDySspDonUs0or07357, 10097 PP Company Sanitized.