AR226-2185 EXPOSURE EVALUATION FOR NEW PROCESS AT FAYETTEVILLE SITE Prepared by DuPont Engineering Technology Debbie Mulrooney Cathie Barton August 20,2001 EID293489 TABLE OF CONTENTS Executive Summary 1.

AR226-2271 CITTr--"" ' ^ DebbiBJMulrooney 04/04Q00201:17PM To: cc: Subject Robert F Pinchot/DEV/AE/DuPont@DuPont Bernard J Reilly/ABDuPont@DuPont Deposition Results and Modeling Report @l Rob, Here are the deposition results for the 2003 emissions for Little Hocking and Lake Washington: Watershed Deposition Results - 2003 Emissio Also, here is the final modeling report: Final Modeling Report.di RP026414 EID582607

AR226-2305 Bl/i4^Z303 ' ffi-'te'-SBEQ 16:46 la'as W DBP LBBRL SER-IICES 93403681 Amp-k?

AR226-2512 cnrr Hidetaka Hiromatsu 04/02/2002 09:04 AM To: cc: Subject: Andrew S Hartten/AE/DiiPont@DuPont David M Rurak/AE/DuPont@DuPont.

AR226-2514 From: Dick J C Meijer on 04/03/2002 07:38 AM CET To: cc: Subject: Ta-Wei Fu/SE/DuPorrt@DuPont Ton Rbelen^UR/DuPont@DuPont, Stephen R Peck/SE/DuPont<s>DuPont, Yoshihiro Hayatsu/PO/DuPont@DuPont, Hidetaka Hiromatsu/PO/DuPont@DuPont, Paul K Mathur/CL/DuPont@DuPbnt, Akito Aba/AE/DuPont@DuPont.

AR226-2549 April 16, 2001 Mr, William Wentworth U.S.

AR 226 _27/8 + Cabot Cra copron fiL926 S54Regulatory Services Sa < 0 RECEIVED SANITIZEOD5JU4 10 AMID: 17 % Ei Ci. ba Eo.

TRADE SECRET AR226-3179 DuPont-6818 Study Title H-24616: Static, Acute, 96-Hour Screening Test to Pimephales promelas Laboratory Project ID: DuPont-6818 AUTHOR: Daniel J.

p. 1 ACUTE TOXICITY TO THE MIDGE (CHIRONOMUS TENTANS) TEST SUBSTANC E Identity : Perfluorooctanoic acid, ammonium salt ; may also be referred to as PFOA, PFOA ammonium salt, Ammonium perfluorooctanoate, FC-116, FC-126, FC-169, or FC-143 .

laft/ A 425Walnut Set, Sue 1800/ Ciniat, OH 45202-3957 Tl 513.381.2638 ox: 513.381.0S2t05eirnsa& tltoro9m - Ciocinnat Clestand Columbus.Danndanapols/Nerthern Kentucky Phoeic Ben maanmeon atin con I THEE I ERA E o2 .

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SEVERN TRENT STL STL Chicago 2417 Bond Slreel University Park, IL 50465 Tel: 70S 534 5200 Fax: 708 534 5211 www.stl-inc.com SEVERN TRENT LABORATORIES ANALYTICAL REPORT JOB NUMBER; 232883 Prepared For: Weston Solutions/ Inc: 1400 W e s t o n Way .

\& 2> March 31, 2003 To: Mary F.

NORTHERN KENTUCKY OFFICE SUITE 340 1717 DIXIE HIGHWAY COVINGTON, KENTUCKY 41011-4704 606-331-2838 513-381-2838 FAX: 513-381-6613 DAYTON, OHIO OFFICE SUITE 900 110 NORTH MAIN STREET DAYTON, OHIO 45402-1786 937-228-2838 FAX: 937-228-2816 Roberta.