2 . 4 5 R C V t a -79 mm> tJTil.iSKEO'BO; E 1. d u P o n t d e N em o u r s & C o m p a n y IN C O R P O R A T E D W il m in g t o n .

A R t t r O 3f l0 ACTIVATED SLUDGE RESPIRATION INHIBITION TEST TEST SUBSTANCE Identity: Perfluorodecanesulfonate, ammonium salt; may also be referred to as PFDS, FC-121-X, or 3M Sample E2112 and E2566-1. (1Decanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heneicosafluoro-, ammonium salt, CAS # 67906-42-7) Remarks: Test sample is a mixture of the test substance in water and 2propanol, 1-(1,1-dimethylethoxy).

HASKELL LABORATORY FOR TOXICOLOGY AND INDUSTRIAL MEDICINE / cc: G.

AR226-2392 \ V y- Du Pon t I N T E R O F F I C E MEMORANDUM Dates From* Dept s T el No 12-May-1987 03s06pm EST TONY PLAYTIS PLAYTIS TEFTECH 2775 T O s ROGER ZIPFEL ( ZIPFEL ) CCs JOHN CRUM ( CRUM ) Subjects C8 In Water A t t ached is a copy of the analytical report for our five water samples, which are identified as follows

AR226-2761 LIVER STUDY OF WASHINGTON WORKS EMPLOYEES EXPOSED TO C-8: RESULTS OF BLOOD BIOCHEMISTRY TESTING WILLIAM E.

-ftRxs.6 . 0 3 0 e!

AR226-2401 A INTEROFFICE MEMORANDW TOt ANTHONY J.

FOR DU FONT USE ONLY AR226-2792 Subchrontc Inhalation Toxicjty of Haskel!

ACTIVATED SLUDGE RESPIRATION INHIBITION TEST TEST SUBSTANCE Identity:Perfluorooctanesulfonyflluoridem;ay also be referredto as POSF, or FX-8. (1-Octanesulfonylfluoride, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecaflCuAoSro-#, 30735-7).

BIODEGRADATION (BOD/COD) TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may also be referredtoas PFOS, FC-95, oras a component ofFC-206C and L-5439. (1-Octanesulfoniacdid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafploutoarsos-i,um salt,CAS # 2795-39-3) Remarks: The 3M productionlotnumber was 501.The testsample is referredtoas L-5439 and FC-206C.

AR226-1030A043 BACK TO MAIN POTENTIAL FOR ENVIRONMENTAL IMPACT OF AFA-6 SURFACTANT A Report for: PANARCTIC OILS LTD.

M SLAG _ 0733 BIODEGRADATION (OECD 301E) TEST SUBSTANCE ________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-203A. (1Octanesulfonic acid) (CAS # 2795-39-3).

AR226-2534 UNITED STATES NVIK0M-1ENTM.

/)R 6 _ 0-713 BIODEGRADATION (OECD 301 E) 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).

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 L-4647. (1Octanesulfonic acid) (CAS # 2795-39-3).