Pathology Associates International A Company of Science Applications International Corporation A nB npk9tC m m dO otiitm nr Sponsor: 3M St.

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HA ZUEtO IM LABORATORIES AM ERICA, INC.

/H U 7 t03M3> BIOACCUMULATION TEST SUBSTANCE Identity: N-Ethylperfluorooctanesulfonamide; may also be referred to as U1464, EtFOSA, EtPOSA, F-6309, or FX-12. (1Octanesulfonamide, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-N-ethyl-, CAS # 4151-50-2) Remarks: Material is a white solid of uncharacterized purity.

ARX& - 03U BIODEGRADATION TEST SUBSTANCE Identity: Perfluorodecanesulfonate, ammonium salt; may also be referred to as PFDS, FC-120, or 3M Sample J2905-1. (1-Decanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10heneicosafluoro-, ammonium salt, CAS # 67906-42-7) Remarks: Test sample is a mixture of the test substance in water and butyl cellosolve (approximately 25% test substance, 37.5% butyl cellosolve and 37.5% water).

ft R W 6 - O M H 5 SrtduAfoud BIO-TEST laJymJjwM,, She. 1810 F R O N T A G E R O A D N O R TH B R O O K .

0710 BIODEGRADATION (BOD/COD) TEST SUBSTANCE Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-203. (1Octanesulfonic acid) (CAS # 2795-39-3).

M 9.SL6 - O73& TOXICITY TO AQUATIC PLANTS TEST SUBSTANCE____________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-203. (1Octanesulfonic acid) (CAS # 2795-39-3).

M~ A C U TE TO X IC ITY TO A Q U A TIC IN VER TEB R A TES (DAPHNIA MAGNA) T E S T SU B STA N CE______________________ _ _ ____________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFO S, FC-95, or as a component of FC-203CE. (1Octanesulfonic acid) (C A S # 2795-39-3).

A R .& & 6 _ O S O H - A C U T E T O X IC IT Y TO F IS H (M U M M IC H O G ) T E S T S U B S T A N C E ____________________________________________________ Id en tity: A mixture containing perfluorooctanesulfonate; m ay also be referred to as P F O S , FC-95, or as a com ponent of FC-206C and 81-2/8. (1-O ctanesulfonicadd, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassium salt, C A S # 2795-39-3) R em arks: The 3M production lot number w as not noted.

M AL6 - O Z ^ O ACTIVATED SLUDGE RESPIRATION INHIBITION TEST TEST SUBSTANCE________________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FX-601. (1Octanesulfonic acid) (CAS # 2795-39-3).

AfLza.G _ 0274 ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE_________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-780B. (1Octanesulfonic acid) (CAS # 2795-39-3).

&x6 ACUTE TO XICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE_______________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FX-3103. (1Octanesulfonic acid) (CAS # 2795-39-3).

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AAA6 - ll<W TWO-MILE RADIUS SURVEY AND C-8 SAMPLING REPORT DUPONT WASHINGTON WORKS FACILITY/LOCAL LANDFILL, WEST VIRGINIA (MARCH - MAY 2002) T 'O o cn ~Ui0*-77 Date: August 2002 Project No.: D6WW7423 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 CONTAJN NC 000365 Two-mile Radius Survey and C-8 Sampling Report Table of Contents TABLE OF CONTENTS 1.0 Introduction...................................................................................................................1 2.0 C-8 Analyses and Analytical Reporting...................................................................... 3 3.0 Washington Works Facility/Local Landfill Two-mile Radius Survey Summary of Results......................................................................................................5 4.0 Re-sampling of Selected Residences Located Within the One-Mile Radius..............6 5.0 Results for Additional Sampling Locations................................................................. 7 6.0 Path Forward................................................................................................................ 8 7.0 References.................................................................................................................... 9 Table 1 Table 2 Table 3 Table 4 TABLES Summary of Off-site Sampling Program (C-8 Sampling) Summary of C-8 Analytical Results in Groundwater and Surface Water (Off-site Wells, Springs, and Cisterns) Local Landfill Two-mile Radius Summary of C-8 Analytical Results in Drinking Water (Off-site Wells, Springs, and Cisterns)--One-mile Radius Re-sampling at Washington Works Facility/Local, Letart, and Dry Run Landfills Summary of Additional C-8 Analytical Results in Groundwater and Surface Water Figure 1 FIGURES Washington Works Facility and Local Landfill Two-mile Radius Map Appendix A Appendix B APPENDIX Two-mile Radius Well Survey Results--Washington Works Facility and Local Landfill DuPont Washington Works West Virginia Miscellaneous Groundwater Samples WV-2 report.doc Jul. 31, 02 Wilmington, DE 000366 i Two-mile Radius Survey and C-8 Sampling Report Introduction 1.0 INTRODUCTION A multi-media consent order (Order No.