AR226-2293 ,/"'"' Pebble J Mulrooney 11/04/2002 12:16 PM To: cc: Subject Catherine A Barton/ABDuPont DuPont FYI (C8 Modeling) - Penntt Detennlnation - Discussion wllh DAQ -- Forwarded by Debbie J Mulrooney/AE/DuPont on 11/04/200Z 12:15 PM - k Robert L HItchey r 11/04/2002 10:30 AM To: cc: Subject: Kart G Kronberg/AE/DuPont DuPont, Michael T Evans/AE/DuPont@DuPont, John E Crum/SE/DuPontDuPon( David F Altman/SE/DuPont @ DuPont, Andrea V Malinowskf/AE/DuPont DuPont, M.

/y Charles J Zarzecki 02/24/2003 02:43 PM To: cc: Subject: Catherine A Barton/AE/DuPont Slides Cathie, Here they are.

AR226-2310 y Charles J Zarzeckl 03/13/2003 11:02 AM To: cc: Subject: Catherine A Barton/AE/DuPont Re: Our stance on actual sampling Q Cathie, Actual sampling wilt show lower numbers.

AR226-2326 ^ JohnWMilroyJH 04/04/2003 11:09 AM To: cc: Subject Catherine A Barton/AE/DuPont@DuPont Stephen R Hastings/DDE/DuPont@DuPont, Ann K IVIasse/HO/DuPont@DuPont, Charles J Zarzecki/AE/DuPont@DuPont Re: Data for air dispersion modeling Q Stack height is 25 feet.

AR226-2402 INTEROFFICE MEMORANDUM Dates From?

AR226-2422 LETART LANDFILL GROimDMATER MONITQRINS - SUMMARY OF FC-143* ANALYTICAL REMITS Date Sampled 03/12/92 10/07/92 Scampie Location Southwest Spring F1ow North Spring Flow Well j?

AR226-2434 ^v-;-^ BRANDERA AT A1 AT EUOIS2 I'"-" w""" 02/18/94 02:27 PM s.

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AR226-2554 Robert F To: cc: Subject: PInohot 04/24/2000QgjJPM. _ __,,.______,,._-_ Gary w Kennedy/AE/DuPontQDuPont, Susan S Miletl/DuPont@DuPort, Michael E McCord/AE/DuPontQDuPont, Robert C Buek/DuPontQDuPont, Oiane R Shomper/Ae/DuPont@DuPont.

AR226-2654 44 AR226-2654 ISC Modeling Methodology and Results Introduction This report summarizes dispersion modeling that was completed for the DuPont Washington Works facility to demonstrate that the emission limits included in Permit Application 2365D for the PFA(Cl-P) operation complies with the C-8 assessment oftoxicity (CAT) recommended airborne screening level of 1.0 ug/m3 at the property line fence.

AR226-2709 31 American Chemical Society (ACS) Summary of DuPont Presentations AR226-2709 Annual Meeting, August 2004 Extraction of Perfluorooctanoie Acid from Polytetrafluoroethylene Polymers and Determination by LC/MS/MS Barbara S.

AR226-2727 LOW LEVEL DETERMIHaTION OF FC-143 IN WATER 'October 1991 CH2M HILL, INC.

AR226-2735 TRADE SRfttFT Study Title EVALUATION OF THE BIODEGRADABILITY OF C-8 USING THE MODIFIED STURM TEST (OECD 301 B) Author John T.

AR226-2814 TRADE SECRET Study Title H-24750: Static, Acute, 48-Hour Toxicity Screening Test with Daphnia magna AUTHORS: Barbra D.

AR226-3029 CCR PROJECT 509800 GENE MUTATION ASSAY IN CHINESE HAMSTER V79 CELLS IN VITRO (V79/HPRT) WITH REPORT Study Completion Date: October 06,1995 RCC Company Sanitized.