AR226-2272 xcr""" ^f :-- 9' Dabbie J Mulrooney 04/10/2002 10:22 AM To: cc: Subject: Catherine A Barton/AE/DuPont@DuPont Wash Works C8 Max Concentration Cathie, You asked me the other day for the maximum concentration value for the Washington Works C8 modeling.

DuPont Fluoroproducts AR226-2342 DuPont Fluoroproducts Chestnut Run Plaza P.O.

Exyeen ^J ^_^RREESSEEAAFRCH^Lpr.e_d_s-"eRReseseeaarrcchh.. .\, Proven Results.

AR226-2559 FILE No. 864 08/01 '01 13:01 ir>;DUDUPONTWILD. -8085-2 ' ^(SY * 123 * A 302 774 6474 07/30/01 (WE 2 16:03 0:02/08 N0;962 I.t^lwtf,1 VIW/ N^rt^ UNmro <TAT1(I ENVWROMNMIWNlMirTPARtO.

H^LancasterLaboratories ygr 2425 New Holland Pike Lancaster, PA 17601 AR226-2726 Analysis #0813FC - Revision 01 Supersedes Date: None "^ .

AR226-2910 FOR DP PONT USE ONLY Copies to Haskell E.

AR226-2925 FOR DU FONT USE ONLY REVISED REPORT Copies to E.

AR226-2940 FOR DU PONT USE ONLY Du Pont HLR 391-89 Study Title Approximate Lethal Dose (ALD) of ^n Rats Author John M.

FOR DU PONT USE ONLY AR226-2945 Du Pont HLR 107-90 Study Title Approximate lethal Dose (ALO) of In Rats Author .

AR226-2971 Study Completed On February 24, 1992 Performing Laboratory B .

AR226-3050 Study Title Skin Irritation Test with H-21946 in Rabbits Laboratory Project ID Haskell Laboratory Report No. 784-96 Author Tracy A.

rr mM MM --M | HR RA6_ 3222 404 TRADE SECRET Study Title 'H-24768: Subchronic Toxicity WithOne9Ge0n-eDraaytiGoanvaRgeeprSotduudcytiinonRaEtvsaluations Volume dof 5 Laboratory Projct ID: DuPont 5990 ARaa6 - 3422 Duron TEST GUIDELINES: U.S.

AR226-3374 m HASKELL LABORATORY Common Name: Ammonium Perfluorooctanoate (C-8) Chemical Name: Octanoic acid, pentadecafluoro-, ammonium salt CAS Registry No.: 3825-26-1 Chemical Structure: CFs - CF2 - CF2 - CF2 - CF2 - CF2 - 0 0 CF2 - C - 0-+NH4 Physical Properties: Form: Molecular Weight: Boiling Point: Melting Point: Density: Recommended AEL 0.01 mg/m3 (8-hour TWA), skin General Toxicity White powder 431 Sublimes @ 110C ---- ----- Ammonium perfluorooctanoate (C-8) has moderate acute oral toxicity with an LD50 in rats of 470 mg/kg A----Jlll981b).

AR226-3392 Subchronic Toxicity 90-Day Oral Gavage Study of of 8-2 Telomer B Alcohol in Rats G.S.

TestingResults:Air-WatoPrartitioCnoefficie(nKtAw) for PFOS AIRIWATER PARTITION COEFFICIENT TEST SUBSTANCE Identity:Perfluorooctanseulfonatem;ay alsobe referretdoas PFOS or FC-95. (1-Octanesulfoniaccid,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-p,otassium saltC,AS # 2795-39-3) Remarks: The testsubstance isa whitepowder.