AR226-2285 Frank P '^^ 05/10/200S2 0m2:4i2thPM_______________): To: cc: Sub(ect: James F Riley/CL/DuPont@DuPont, Catherine A Barton/AE/DuPont@DuPont.

AR226-2309 ^y Mark C Hause 03/12/2003 04:25 PM To: cc: Subject: David M Rurak/AE/DuPont@DuPont Catherine A Barton/AE/DuPont@DuPont, Charles J Zarzecki/AE/DuPont@DuPont ISC Model Dave, Per our discussion, I have spoken with Cathie on the need to investigate the model and its validity for 1 and 8 hour periods.

AR226-2329 ""-.f / IreneALegiec___________04/TO/2003 09:58 AM To: cc: Subject: Mark D Richmond/AE/DuPorrt@DuPont, Carl E Camp/AE/DuPontQDuPont.

AR226-2347 Relevance of Soil Sampling in Screening Level Assessments PFOA October 22,2003 Discussion Topics Review soil sampling key learning^ Present site screening level assessmen conceptual model Messages For Today Soil sampling is not critical to site scre level assessments designed to evaluate overall human and environmental expo at a PFOA use facility.

AR226-2355 A F^y FCoM: ) (JlJPOIGDu)Pont Engineering j Andrew S.

AR226-2507 COMPILATION OF HISTORICAL C-8 DATA DUPONT WASHINGTON WORKS MAIN PLANT AND LANDFILLS Kate: Jattttiay 2002 Projtct Mo; D6WW7423 h ^ CORPORATC R6MEDIAT1CW GROUP ftnAlSancobetttwin DuPci^ and OfiS DimwntI Bailey Ml PteHi.

AR226-2599 ^ Andrew S Hartten 02/13/2003 02:32 PM To: ce: Subject: "Steve Williams" <steve.williams@epa.state.oh.us> @ DUPONT_MHUB "Michael Preston" <michael.preston@epa.state.oh.us>, "Sarah Wallace" <sarah.wallace@epa.state.oh.us>, M.

AR226-2600 1 A^wl-kL 6tppi-b U^A'1&:M^ &^4 , 5oftzMftfi lcfcp^f4 JMia^fiX.

AR226-2649 39 AR226-2649 ISC Modeling Methodology and Results Emission Source Information The ISC3 model was used to calculate ambient ground-level air concentrations and deposition rates for year 2000 actual C8 emissions from the Washington Works site.

AR226-2669 '1 01 \ CD AR226-2669 September 2002 Through August 2003 Air Dispersion Modeling Analysis of APFO Emissions (Revised) May 24,2004 Page 1 of 9 SEPTEMBER 2002 THROUGH AUGUST 2003 AIR DISPERSION MODELING ANALYSIS OF APFO EMISSIONS (Revised) DuPont Washington Works Facility Parkersburg, West Virginia Prepared for: West Virginia Department of Environmental Protection Division of Air Quality 7012 MacCorkle Ave, SE Charleston, WV 25304-2943 Prepared by: DuPont Engineering Technology (DuET) Environmental Section Wilmington, DE 19898 C:\c8\c8_0803_report_revised May 24,2004 ] a September 2002 Through August 2003 Air Dispersion Modeling Analysis ofAPFO Emissions (Revised) May 24,2004 Page 2 of 9 1.

AR226-2687 9 AR226-2687 DuPont EMSE Report No. 18-02 FINAL REPORT Study Title ACTIVATED SLUDGE RESPIRATION INHIBITION TEST OF TELOMER B 8-2 ALCOHOL|QECD 209) ;'., ./'...; Test Guideline OECD (1984) Guideline for Testing of Chemicals, Section 2, No. 209: "Activated Sludge, Respiration Inhibition Test", adopted April 4,1984 Author William R.

AR226-2834 Material Tested: Copies to: E, I, du Font de Nemours and Company Haskell Laboratory for Toxicology and Industrial!

#R246 - 3320 52 H24768:OneGeneration Reproduction Study in Rats ARA4G - 3320 DuPont 13784 --~ : TRADE SECRET : Study Title F-24768: One-Generation Reproduction Study in Rats Volume 10f2 Laboratory Project ID: DuPont-13784 -- . | Auras: Eve Mylchreest, Ph.D.

onciusions rrom rrevious Keview (15-bec-2003) AR226-3325 bOE Used to Screen Main Ef PFOA Levels I DuPont Confidential onpanystant.Doos 7!

AR226-3335 Datamemo Date: September 21,2000 To: Barbara S.