AR226-2372 r S ftUu7~^Wsf j j l (L VAQzIbJ Qfl[ -^UAHA ^.pN anu. iW i^ K r C u p ^ UJUs, ce?

AR226-2458 J Stephen Opp 0 5 /1 7 /9 9 0 1 :4 0 PM To: Roger J Zipfel/AE/DuPont@DuPont, Robert L Ritchey/CL/DuPont@DuPont cc: Andrew S Hartten/AE/DuPont@DuPont Subject: 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.

AR226-2496 .Analysis Report LancasterLaboratories f Wh&Gquaiitykasckrm a n a ly tic a l r e su l t s Prqrwed foP CRO-RLDuPomde Nemours & Co Barley Mill Plaza, Bldg. 27 Lancaster race & Route 141 WUrmogtoilLB 19805 302-992^76?

AR226-2518 I OHIO RIVER WATER SAMPLING RESULTS DUPONT WASHINGTON WORKS FACILITY AND THE LETART LANDFILL Date: November 2002 Project No,: D6WW7423 18983635,14000 18983632,00021 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 ' SB019657 E ID 630089 DRAFT Ohio River Water Sampling Results Table of Contents TABLE OF CONTENTS 1.0 Introduction............ ................................................................................ 2.0 C-S Analyses and Analytical R eporting........................................... ..... 3.0 Ohio River Water C-8 Results Near The Washington Works Facility 4.0 Ohio River Water C-8 Results Near the Letart Landfill...................... 5.0 Ohio River Parameters.................................................................. ......... 6.0 References................................................................................................

AR226-2671 RECYCLED AR226-2671 SOIL COLUMN LEACHING STUDY FOR PFOA Date: August 2004 Project No.: 507423 18983990.04006 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 1.0 STUDY PURPOSE & PRINCIPLE A soil column leaching study for perfluorooctanoic acid (PFOA) was designed by DuPont to determine the vertical mobility or leaching o f air deposited ammonium perfluorooctanoate (APFO)/rainwater mobilized PFOA through clayey silt and silty clay soil.

NOVEMBER 15,2004 EPA PRODUCTION VOLUME 28 BIODEGRADATION /DEGRADATION VOLUME I of II 1 ~0021453.txt h TELOMER PRODUCTS - SURFACTANTS ABSTRACTS c Thermal Degradation D.

AR226-2682 RECYCLED AR226-2682 i C-8 BIODEGRADATION IN ---------- GROUND WATER------ Andrew Hartten Dave Ellis May 7, 1998 g N O W 0o) >J EID473110 \ GEOLOGICAL CROSS SECTION S d rfih RJZ036078 SAMPLING LOCATIONS SITE CONCEPTUAL MODEL Source Areas Former anaerobic digestion ponds (sludges removed) C-8 up to 614 mg/kg @ 8 - 1 0 foot depth Ground water at 30' q ESI O w 0o) 00 EID473113 SITE CONCEPTUAL MODEL - 2 Hydrogeology Sand and gravel 65-100 feet deep Yields up to 300 GPM Production wells influence GW flow paths Linear velocity 1 ft/day K= loo ft/day ta H o it #* RJZ036081 LUBECK WELL FIELD I Travel time from anaerobic ponds is about 5 years / **" -* 2 ppb discharge concentration M Ha RJZ036082 M w \ WHY STUDY C-8 DEGRADATION IN GROUND WATER?

% AR226-2750 Copies to: E.

AR226-2849 ACUTE INHALATION TOXICITY STUDIES ON FOUR MIXTURES Haskell Laboratory Report Ho. 115-76 Report by: gess logist Approved by: _ tbs rochisGwicz Chief Inhalation Toxicology Section B A B :dhg jjate Issuei February 17, 1976 Company Sanitized.

FOR DU PONT USE ONLY AR226-2897 Copies t E.

BIOSEARCH INCORPORATED P O- B O * B5* 8 ' PHILADELPHIA.

Study Sponsor: Issu e Date: Docum ent Reference No.: ATOCHEM 4-Jun-92 AR226-2972 n.

AR226-3004 DuPont HLR2S7-S4 HASKELL LABORATORY FOR TOXICOLOGY AND INDUSTRIAL MEDICINE STATIC.

< m AR226-3060 Study Title 100-Person Human Patch Test with H-21936 (Test Item) laboratory Project ID Haskell Laboratory Report No. 713-96 Study Completed On September 30, 1996 Contracting Laboratory ConTox Limited 3408-50 B Street Philadelphia, Pennsylvania 19134 Author - David Gabriel for E.

AR226-3188 DuPont-4739 TRADE SECRET Study Title H-24616: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations Volume 5 o f 5 Laboratory Project ID: DuPont-4739 Test Guidelines: U.S.