i b o r a t o r i e s INowHoftni P O 'B a x m a s .

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.

MU- & o 412 DuPont-8868 TRADE SECRET Study Title H-25171: Bacterial Reverse Mutation Test with an Independent Repeat Assay Authors Valentine O.

450 $#2&& - $ & & & Haskell Laboratory for Toxicology and Industrial Medicine March 13,2003 TO: MR] L Study in Rats Repeated-Dose Oral Toxicity Gavage Range Finder cc: G.

ip M w - 32g ?

AR226-3325 Conclusions From Previous Review Company Sanitized.

Op-) SfrOOO 0 9 J 000488 DATA SUMMARY Chemical: Perfluorooctanoic Acid Site: Washington Works, Parkersburg, West Virginia Date of Monitoring; 1979 Matrix: PFOA in Whole Blood Operation: Teflon Job Title Number Sampled Entire Cohort Males Females Operators Males Females Mechanics Males Females Laboratorians Males Females Supervision Males Females 72 72 0 61 61 0 5 5 0 2 2 0 4 4 0 Minimum Concentration (ppm) 0.1 0.1 - 0.1 0.1 - 0.6 0.6 - 0.31 0.31 - 0.53 0.53 - Mean (ppm) 4.99 4.99 - 5.74 5.74 - 0.71 0.71 - 0.52 0.52 - 1.14 1.14 - Median (ppm) 2.8 2.8 . 3.9 3.9 - 0.65 0.65 - 0.52 0.52 - 0.72 0.72 .- Maximum Concentration (ppm) 28.4 28.4 - 28.4 28.4 - 0.9 0.9 - 0.72 0.72 - 2.6 2.6 - Standard j Deviation i 6.24 6.24 - 6.48 6.48 - 0.13 0.13 - 0.29 0.29 - 0.99 0.99 - Comments: Samples analyzed by National Medical Services Data extracted from WW site database by site industrial hygienist Tony Playtis Descriptive statistics calculated using Microsoft Excel Operation indicates work assignment of person at time of sample and does not reflect past work history Prepared by: Barbara J.

SEVERN TRENT STL STL Chicago 2 4 1 7 Bond Street University Park, IL 6 0 4 66 Tel: 70S 5 3 4 5 2 0 0 Fax; 7 0 8 534 5211 www.stl-inc.com SEVERN TRENT LABORATORIES ANALYTICAL .RE PORT JOB NUMBER: 2 3 2 0 8 b Prepared For: Weston Solutions, inc,, 1400 Weston Way Building 5-2 Wegt Chester, p a i938-i499 Pro jact : Conf idential Decatur - FC Investigation Attenti on : Jai Ko sari Date.: 1 2 / 3 / 2 0 4 Title: Project.

A d SiG - o G G O N-Et FOSE alcohol Teratology - 000375 HAZLETON LABORATORIES AMERICA.

/W .S i6-067S Centre Analytical Laboratories, Inc 3 04 8 Research Drive Phone: (814) 231-8032 State C ollege, PA 16801 Fax: (814) 231-1253 or (814) 231-1580 Analytical Report Fluorocheraicai Characterization of Surface Water Samples Port St.

1 AdobeAcrebat

I PAUL MERRELL & CAROL VAN STRUM 7493 East Five Rivers Road Tideuater, Oregon 97390 Telephone: (503) 528-7151 Telefax: (503) 528-7105 FAX TRANSMITTAL.

t y "COU-I l*T. 01 ACIUtUIlVlUi W J'A U T M i.X r OJ* NUTtiVlK'SMl.

GENERAL ELECTRICS ASSORTED BATES # s SEE SHEET IN S ID E FOR L IS T OF # s BATES # s 803510 - & 3& y a Jo T CL April 4, 1950 Mr.

BRADLEY & MERRELL c/ 0 JON ES, JONES, C LO SE & BROWN, CHARTERED Si iventh Floor -- Bank of America Plaza 300 South Fourth Street Las Vegas, Nevada 89101-6026 (702) 385-4202 i M ESSAGE FROM XERO X 7024: (702) 385-1655 I>ATE: 2 - _____ TO: Carol Van Strum FAX #: (503) 528-7105 PHONE #: (503) 528-7151 FROM: Paul E.