AR226-2981 DU PONT HLR 879-92 HASKELL LABORATORY FOR TOXICOLOGY AND INDUSTRIAL MEDICINE STATIC.

AR226-3123 DuPont-3101 HASKELALNLDAIBNODRUASTTORRIAYLFMOERDTIOCIXNIECOLOGY H-24108: STATIC, TAOCUDTaEph4n8ia-HmOaUgnRaSCREENING TEST PURPOSE: Ttheisst cisonacreanntgreaftiionndsinagnsdtuddaytadmeseiagsnuerdemtoepnrtsovaitdpereadneetesrtimmianteedoifnateqruvaatlisc. toxicity using fixed GENERAL INFORMATION WORK tHRiAEi sQSTMKUEELS.TL1.

P-1 "McCrea, Deborah" <mccrea@taftlaw.com> 0 3 /0 6 /2 0 0 9 02:34 PM To N C IC O P P T @ E P A cc "Bilott, R obert A." < bilott@ taftlaw .com > bcc S ubject Subm ission to E P A -H Q -O P P T -20 03-0 01 2 Taft / Deborah McCrea / Legal Assistant Taft Stettinius & Hollister LLP 425 Walnut Street, Suite 1800 Cincinnati, Ohio 45202-3957 Tel: 513.381.2838 Fax: 513.381.0205 www.taftlaw.com / mccrea@taftlaw.com A d -^ -Q - Internal Revenue Service Circular 230 Disclosure: As provided for in Treasury regulations, advice (if any) relating to federal taxes that is contained in this communication (including attachments) is not intended or written to be used, and cannot be used, for the purpose of (1) avoiding penalties under the Internal Revenue Code or (2) promoting, marketing or recommending to another party any transaction or matter addressed herein.

A R 1 U -0 1 5 I Laboratory Report Interim Report of Preliminary Data for 26 Week Capsule Toxicology Study with PFOS in Cynomolgus Monkeys Laboratory Report No.

BACK TO MAIN Centre Analytical Laboratories, Inc. 3048 Research Drive State College, PA 16801 www.centrelab.com ^P hone: (814) 231-8032 Fax: (814) 231-1253 or (814) 231-1580 Analytical Report Fluorochemical Characterization of POTW Effluent Mobile, Alabama (W2151) Centre Analytical Laboratory Report No. 023-014K (Revision 1) Revision Date 3/26/01 Testing Laboratory Centre Analytical Laboratory, Inc. 3048 Research Drive State College, PA 16801 3M Environmental Laboratory Contact Kent R.

Form 10620-5-PWO cc: LAB REQUEST BOOK - 42-5W PRODUCT ECOLOGICAL ASSESSMENT REQUEST FOR LABORATORY WORK Ref: EN VIR.

Pathology and Toxicology RNcer Liboratoriea, Inc.

M SIA 6- ntM-2 STUDY OF MYOCARDIAL INFARCTION AT WASHINGTON WORKS PLANT This study was conducted to evaluate the incidence of cases of myocardial infarction among male wage and salary roll employees at the Washington Works Plant from 1956 to 1973.

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.

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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.

AR226-2671 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.

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.