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39 ff UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, D.C. 20460 1133 OFFICE OF PREVENTION, PESTICIDES AND TOXIC SUBSTANCES 21 October 2002 MEMORANDUM: SUBJECT: Focussed statistical analyses of APFO data on >and preweaning loss g?

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3 FLUOROCHEMICAL SUBMISSION 2000 Click a Month BACK TO YEAR MENU TOXICOLOGY, EPIDEMIOLOGY AND MEDICAL SURVEILLANCE February May August

f l& 2 6 -1 6 f t FFOS: A PILOT REPRODUCTION STUDY WITH THE NORTHERN BOBWHITE FINAL REPORT WILDLIFE INTERNATIONAL, LTD.

PFOS: A PILOT REPRODUCTION STUDY WITH THE MALLARD FINAL REPORT WILDLIFE INTERNATIONAL, LTD.

At&t> STUDY TITLE Extraction of Potassium Perfluorooctanesulfonate from Egg Membrane, Albumen, and Yolk for Analysis Using HPLC-Electrospray/Mass Spectrometry DATA REQUIREMENTS Analytical Method Requirements STUDY DIRECTOR Sean Gallagher STUDY COMPLETED ON September 06, 2001 PERFORMING LABORATORY / TESTING FACILITY Centre Analytical Laboratories, Inc.

AR226-2182 Robert F Pinchot 08/22/2001 12:50 PM To: cc: Subject: Chris E Shoop/AE/DuPont@DuPont, Ta-Wei Fu/SE/DuPont@DuPont, Roger J Zipfel/AE/DuPont@DuPont Debbie J Mulrooney/AE/DuPont@DuPont, Stephen J Gissy/AE/DuPont@DuPont, David M Rurak/AE/DuPont@DuPont APFO Air modeling: Meeting Monday August 27th Chris, Ta-W ei, Roger, Debbie tells me she will have all the information that she needs to run a "final" current state air dispersion model by late this week.

AR226-2184 EXPOSURE EVALUATION FOR NEW PROCESS AT FAYETTEVILLE SITE Prepared by DuPont Engineering Technology Debbie M ulrooney C athie Barton August 20,2001 CABO00X88 EID547037 TABLE OF CONTENTS Executive Sum m ary 1 .

AR226-2251 Catherine A Barton ^ 01/30/2002 05:12 PWI To- Mark H Russell/AE/DuPont@DuPont cc: Robert F Pinchot/DEV/AE/DuPont@DuPont, Andrew S Hartten/AE/DuPont@DuPont, Theodore H Carski/AE/DuPont@DuPont Subject: Re: Draft modeling report D Mark, Thanks so much for your great work.

SITE SCREENING LEVEL ASSESSMENTS FOR PFOA AND THE RELEVANCE OF SOIL SAMPLING Date: O ctober20,2003 Project No.: 18983753.00034 CO RPO RATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 EXP001453 Site Screening Level Assessm ents for P FO A and the R elevance of Soil Sampling Table of Contents TABLE OF CONTENTS Executive Summary............................................................................................ 1.0 Introduction.................................................................................................................. 1 OO U* U ^ 2.0 Data Presentation..................... 2.1 Development o f a Generalized PFOA Screening Level Site Conceptual M odel........................................................................................................ 2.2 Laboratory Studies o f PFOA and Field Sample Verification................. 2.2.1 TTie Behavior o f PFOA in W ater.... ........................................... 2.2.2 Adsorption/Desorption o f Ammonium Perfluorooctanoate to Soil............................................................................................... 2.2.3 Little Hocking Water Association Investigation Results........... 2.2.4 Washington Works RFI Soil Sampling Results.......................... 3 3.0 Summary............................................................ ...................................................... io 4.0 References................................................................................................................. 11 Table 1 Table 2 Table 3 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 TABLES Washington Works RFI Soil PFOA Results Washington Works RFI Surface Soil PFOA Results Washington Works RFI ADP SWMU Soil PFOA Results FIGURES PFOA Screening Level Assessment Model Comparison o f K ^'s for PFOA and Other Chemicals Little Hocking Water Association Well Field Soil PFOA Results Washington Works RFI Soil PFOA Results Washington Works RFI Surface Soil PFOA Results Washington Works RFI ADP SWMU Soil PFOA Results soil position paper4.doc Oct. 20, 03 Wilmington, DE EXP001454 I Site Screening Level A ssessm ents for PFO A and the Relevance of Soil Sampling Executive Summary EXECUTIVE SUMMARY DuPont's extensive implementation o f both media specific assessment modeling tools and comprehensive on-site and off-site soil, surface-water, and groundwater monitoring for perfluorooctanoate1at the Washington Works site in West Virginia allowed for compilation o f a generalized screening level assessment model.

AR226-2516 i--1^ 11 ..

AR226-2597 GIST meeting notes August 12,2002 I Minutes from the GIST meeting November 13, 2002 The meeting began at approximately 9:00 am. in the Division of Water Resources' conference room at 1201 Greenbrier St., Charleston, WV, Attending were Dave Watkins, George Dasher, Chad Board, and Don Criss o f the Division of Water Resources (DWR), Bill Toomey for the Bureau for Public Health, Steve Williams and Sara Wallace of the Ohio EPA, and Andrew Hartten representing DuPont.