Wildlife International, Ltd. - 1- Project Number 454C-101-1 NON-GLP STUDY: DETERM INATION OF THE SOLUBILITY OF PFOS IN W ILDLIFE INTERNATIONAL, LTD.

Northwest Bioanalytical Study No.

Hollvhouse Inc PO Box 474 1771 Sandy Point Rd.

f'I<-- nt CfmlPt Mv s - o ^ i Extern and Route of Excretion and Tissue.

P M226-/93S Proven Results. i \ m Analytical Report itf 3M Company Analysis o f PFOA and PFOS in W ater Samples from O akdale M unicipality E05-0074 m Exygen Report No.

7 tlE V . 7->C < M S > cttuusMOitofc E.

AR226-2042 WASHINGTON WORKS C-8 INDUSTRIAL HYGIENE A.

WASHINGTON WORKS C-6 HAXIHiltt B-Hf) COflC.

AR226-2256 Chris E Shoop 02/18/2002 12:30 PM____________________________ _____ To: Debbie J Mulrooney/AE/DuPont@DuPont cc: Robert I Wevodau/SE/DuPont@DuPont, Robert F Pinchot/DEV/AE/DuPont@DuPont Subject: Re: Case 10 Questions O Debbie, The production rates in Case 10 were from forecasts for about 2007.

MScoodpeeliannad Cost of Air Dispersion Cathie Barton DuPont 03/10/03 AR226- Overview of the Scope Can hire contractor or use inhouse modeling resources GaDthaetraing Modeling InotefrRpreestualttison Ycoriutircianlphuetreis 03/10/03 Data Gathering Meteorological Data * Terrain elevation maps Stack Parameters - Location (coordinates) Minofdoegrlemeytrsaotttuyihopinsicfaolrly - Height - Temperature - Stack gas vertical velocity - Diameter - Emission rates for each compound Plot Plan - Exact locations of all sources - Property line - Building locations and heights EID 719401 03/10/03 Standard Model and Methodology EPA's preferred model: Industrial Source Complex Short Term 3 (ISCST3) Model Procedures detailed in EPA's Guideline on Air Quality Models (40 CFR 51 Appendix W) http://www.epa.gov/scram001/guidance/gui de/appw_01.pdf M H 03/ 10/03 Modeling Output Model will calculate hourly concentrations in ug/m3 across a study area (5 km x 5 km for example) Model will average those concentrations over a designated time period (24 hour, monthly, yearly) Concentration contours showed extent of different ug/m3 Also shows numerical values (top 10 in the study area and locations) 03/ 10/03 Technicolor Example of Output WcGnO EID 719404 r_ Interpretation of Results Compare maximum averaged concentration to appropriate "threshold" value - Maximum annual average would be compared to a chronic toxicity value - Maximum hourly average would be compared to an acute toxicity value P O Oo wcn 03/10/03 to EX D 719405 Cost and Timing Expect about 50 man-hours (_10 hours) Costs - Outside modeler charges approximately $150/hr - Meteorological data could be up to $1,000' - Estimate around $8,500 for an average job. o o owcn 03/10/03 o EID 719406

AR226-2405 INTEROFFICE MEMORANDUM Date: From: Dept: Tel No: 30--Nov--1983 01:36pm ANTHONY J.

AR226-2412 BACKGROUND M AT IS C-8?

AR226-2448 INTEROFFICE MEMORANDUM Date: From: Dept: Tel No: 16-Sep*1997 03:07pm Gregory A Chapman CHAPMAGA Fluoroproducts 304-863-2535 TO: See Below Subject: Action Items from 9/16 C-8 Sampling Meeting 1.

AR226-2476 i t .. *. 8-14-00 Jim: Per your request fo r assistance in wording a letter to your customers, here is a draft th at m ay be helpful.

Confidential Standard BLANK M100 M200 M300 M400 M500 M600 M700 -Standard!