M AS.6 - O 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-206CE. (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 FC-780. (1Octanesulfonic acid) (CAS # 2795-39-3).

A R SlA 6 _ 0 8 7 / BIODEGRADATION (OECD 301D) I ES31SUB5TAMCE____________________________________________ 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).

; -- Environmental Engineering and Paloton Control jc and Pollution ControF3M ov neon wad JUNOT 1981 So ONREARIY [i vMaayy 2299,, 11998811 MINN,POLLUTION MMErrx..ecLLuootuuiiivsse DBBirrreeieimmchhtuuorrrsstt,, MEM1ixi9ne3n5ncneuestsWoioetvtsaeat CDPPoioourllnellctuuttytioioroRnnoadCCoonn52ttrrooll AAggeennccyy : RR1oo93ss5eevviiWllellseet,, CoMMuiinnntnnyeessooRttoaaad55B552111133 -DDeeaarr MMrr..

AR 226 _ 0910 ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-85, o as a component of FX-3103.

i PrBoudiuldcitnigon Operators 00..006124 00..017470 00..105205 00..018140 00..003297 0.0.215500 0.014 0.250 0.09 ANPAOLLYYTMIECRALPRORDEUSCULTTSS:- CFHCA-M14B3E*RSINWORBKLSOOD MBeucihladniincg July-August First 1981 Technicians SupLeirnviesion Sol_uPtrieopnt EmuPlrseipon DeFveetlhoopdment Technician FC-143 as aan)rivorine in Blood 0.059 00..001136 (00..001153, 0A..0D2.0 ND. 0.X0.3D.2 <<00..000077 00..003135 (00..000077, 0.00 (o0.-0o1u6 y (00-.10290 - o 0.059 0.033 0.059 0.018 0.007 0.120 0.020 0.03% 0.009 = ew 0 migh 0 eam Overall Range: 0-0.250, Overall Mean: 0.049 #**#ADzumpolnidcuantePenrusfbleurosroorcetpaonrotaedtefor four individuals.

A226 1620 cc: 2R.0MJ..

\ AR226-2392 ; ^ D u P o (t t TOs CCs ROGER 2IPFEL JOHN CRUM INTEROFFICE MEMORANDUM Dates Froms l2-Mav-19B7 03;06pm EST TONY PLAYTIS PLAYTI8 Oepti Tel Not TEFTECH 2775 ( ZIPFEL ) t CRUM ) Subjects C8 In Water Attached is a copy of the analytical report for our five water samples, which are identified as follows

AR226-2584 OuPoni Ena'ineeritiB BarttYMillPlBZa.Blllg.27 Lancaster Pike 8. ftte. 141 Wilmington.OE 1980S DuPont Engineering May 7.2002 George R.

AR226-2775 FOR DU FONT USE ONLY I.

OTHER "AILABLE STUDY SUMMARIES FOR N-ETFOSE ALCOHOL TEST SUBSTANCE Identity:N-ethylperfluorooctanseulfonamidoethanolm;ay alsobe referredtoas N-ETFOSE Alcoholor FM-3422. (1-Octanesulfonamide,N-ethyi1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-N-(2-hydroxyethyl)-, CAS # 1691-99-2) Remarks: Materialisan off-whitew,axy solidofuncharacterizedpurity.

FINAL'REPORT ACUTE INHALATION TOXICITY STUDY IN RATS T-2991!

CorporatOeccupationMaelWcine 3M CenterB,uildin2g20-3W-05 St.PaulM,N 55144-1000 651'/'4j2730Telephone 6517339066Fax 3.

ACUTE TOXICITY TO AQUATIC INVERTEBRATES (DAPHNIA MAGNA) TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may alsobe referredtoas PFOS, FC-95, or as a component of FC-602. (1Octanesulfonicacid)(CAS # 2795-39-3).

InternaClorrespondence rc: ACN: F.