AR226-2043 To: Roger J Zipfel/AE/DuPont@DuPorrtI Partick J Cavanagh/CL/DuPont@DuPont cc: Jack L Offenberger/AE/DuPont@DuPont, Anthony J Playtis/CL/DuPont@DuPont Subject: Special C-8 Results, 6/8/99 Results o f the nonroutine C-8 testing you requested: Recovery Building Roof 0 .54 mpb Smoking Area pump failure - no result Inside Recovery Building 1.15 mpb Roof Outside Monomer CR 0.31 mpb Recovery Building CR field blank 0.07 mpb < 0 ,0 5 mpb Samples were taken 1:25 to 5:40 PM, 6/8/99.

oSS"*" "i jsmn Q-t i FCPfimtjiiJ falsSr TVotecti /SaPtiu ' .- I k j s 3 .

AR226-2204 F.

DuPont 2004 Multi-Media Sampling Plan WV and OH January 15, 2004 AR226-2354 EXP000190 Jammy 15,2004 DuPon, "Phase 2" Media to be Sampled bv DuPont in 2004 in WV and OH Air Private Water Sources Public Water Sources Soil Biota EXP000191 [above listing excludes sampling required by permit] January 1 5 ,2 0 0 4 DuPont DuPont Washington Works Area Air Modeling/Samnling Completed - Air dispersion modeling completed and updated for ambient air concentrations (Time periods: year 2002 and 9/02 - 8/03, AR226 and ECA docket) In-progress - Fence line sampling in progress to compare results from ambient air sampling and air dispersion modeling to understand how modeling predictions relate to measured ambient air concentrations EXP000192 January 1 5,2004 DuPont 3 Air Objective: Compare results from ambient air sampling to air dispersion modeling.

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.