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AR 3 6 - 0 6 6 g ACUTE TOXICITY TO AQUATIC INVERTEBRATES (DAPHNIA MAGNA) TEST SUBSTANCE___________________________________________ Identity: A mixture containing perfiuorooctanesulfonate, which may also be referred to as PFOS, FC-95 or as a component of FC-201AF. (1Octanesulfonic acid) (CAS # 2795-39-3).

0750 ACUTE TO XIC ITY TO FISH TEST SUBSTANCE________________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-203CE. (1Octanesulfonic acid) (CAS # 2795-39-3).

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-206C and 81-2/8. (1-Octanesulfonicadd, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks: The 3M production lot number was not noted.

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M S ia -G - * 1 9 BIODEGRADATION (BOD/COD) TEST SUBSTANCE_______________________________________ __ Identity: A mixture containing perfluorooctanesulfonate; may also be referred to as PFOS, FC-95, or as a component of FC-206CF or FC-206CF-X. (1-Octanesulfonic acid) (CAS # 2795-39-3).

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NOTE TO FILE - AR 226 DATE: March 28, 2001 FROM: Karen Lannon SUBJECT: 3/26/01 Perfluoroalkanoic acids VC0^0 /o o ?

JJ16 - 1 1 ^ r-r.r i BIODEGRADATION STUDY REPORT R evision 1 Wednesday, November 06, 2002 Biodegradation Screen Study for Telomer-Type Alcohols Project Number 3M Projects ID: E01-0684 Pace Contract Analytical Projects ID: CA085 Study Director Cleston C.

AR226-1394 CS-357S KCV I E.

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19 of 30 A R S - \So3 C-8 DATA SUMMARY REPORT CONSENT ORDER GWR-2001-019 DuPont Washington Works Facility and Local, Letart And Dry Run Landfills February 2003 Project No. 7423 18983635 Prepared by t j ON NIVlNQQ CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 000008 OEPA 4053 DuPont Engineerifig Barley M ill Plaza i Bldg, 27 Lancaster Pika & Rte. 141 Wilmington, DE 19805 DuPont Engineering February 5,2003 David P.

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