7^5?

^ -t l(* ~ /) FROM: . / PAUL THISTLETON Polymer Products Dept.

-422r 1*7 Wildlife International, Ltd.

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.

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.

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

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

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

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

RECYCLED cn AR226-2617 2003-DuET-??

RECYCLED r\D AR226-2636 AR226-2636 MARCH 2003 2ND ROUND C-8 SAMPLING DUPONT FAYETTEVILLE WORKS FAYETTEVILLE, NORTH CAROLINA Date: June 2003 Project No.: 18983753.00037 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 March 2003 2nd Round C-8 Sampling Introduction On March 27th2003, groundwater was sampled from four monitoring wells at the DuPont Fayetteville Works.

r 3 SfM Ammonium Perfluorooctanoate: Cross-Sectional Surveillance in a Community Sample of Clinical Measures of General Health Status Related to a Serum Biomarker of Exposure A Study Protocol Preparedfo r DuPont Haskell Laboratory Newark, Delaware Prepared by The Sapphire Group, Inc.

I I I I I I I I I I I I I I I I AR226-2745 EFFECT OF FLUOROCARBON DISPERSING AGENTS ON THE LIVERS OF RATS AND DOGS Medical Research Project Nos Report No. 123-65 m* * powerful surfactants.

Study Sponsor: Issue Date: Document Reference No.: ELFATOCHEM 04-Jul-95 95/SAEK/0489/AMP " AR226-3021 Bacterial Growth Inhibition Author(s): H.