BACK TO MAIN ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE Identity: Perfluorooctanesulfonylamido(ethyl)acetate; may also be referred to as PFOSAA, FC-128 or as the major component of FC-127, FC-129, FC-109, FC-109-X, FC-4351, or L-6778.

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Toxicological Summary PFOS Dietary Chronic Definitive Reproductive Study: Mallard Test Substance: Perfluorooctanesulfonate (PFOS) Structure: 1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro, potassium salt.

- Gener Offices m SCianoesr son GEHQ- 0704 -- 00573 3M Certified Mail "aid oo _AR22%- DEoPcAumEeasntt-PRroocoesmsi6n4g2C8eAntttenr: Section 8() UOfSfiEcPe Aof Pollution Prevention and Toxics W1a2s0h0iPnegntnosnylDvCani2a04A6v0e-n0u0e01NW RE: TDoScCkAet8N(oE.)

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AR226-2033 WASHINGTON WORKS " INDUSTRIAL HYGIENE REPORT FROM l-Jan-1995 TO l8-Dec-1997 AREA: E-LUOROCaRBOMS - COPOLYMERS IB.Dec-1997 Page 1 CHEMICAL SAMPLB LOCATION *;CONTROL -8/FC-143 610| DATS; 9-JuX-J DURATION; 390 SAMPLE TYPE; P [BEAD SWECO NOTEBOOK: SCREEMER OPERAT TCP02,P293 EMPLOYEE ftOOOOO C^dhw COKCi 0.02 MPB PERCENTAGE s 4 % PERS CODEs 18PJ ^f^^'h ^V^^ ^.

AR226-2071 25850B Processed!!

AR226-2181 Chris EShoop_ 08/22/2001 12:42 PM To: Debbie J Mulrooney/AE/DuPont@DuPont i cc: Subject: Revised Data for Stacks Debbie, Please see the attached file for the data file containing revised slack heights, diameters, and velocities.

AR226-2245 Thompson Collins Watklns Smith Name r9 9 Particulate Vapor Total N Deposition Deposition Deposition O Coordinates (q/m 2/yr) (q/m 2/yr) (g/m2yr) O A A 445213E 0 .00098 0.00008 0 .00106 W 4346090N 443141E 4345753N 443223E 4345847N 443254E 4345888N 0 .00179 0.00193 0.00186 0 .00021 0.00019 0.00018 0 .00200 0.00212 0.00204 Concentrations are from the deposition modeling runs, and Include wet and dry depletion due to deposition Particulate Concentration (ug/m3) Vapor Concentration (ug/m') Total Concentration (ug/m3 0 .02000 0 .03217 0 .05217 0 .03752 0.05854 0 .09606 0.03665 0.05695 0 .09380 0 .03554 0.05587 0 .09141

AR226-2304 Based on RAGS (Superfund) guidance, Exhibit 6-11 Intake (mg/kg-day) =CWxlRxEFxEP BWxAT !

AR226-2343 ATTACHMENT 1 YEAR 2002 AIR DISPERSION MODELING ANALYSIS OF APFO EMISSIONS DuPont Washington Works Facility Parkersburg, West Virginia Prepared by: DuPont Engineering Technology (DuET) Environmental Section WUmmgton,DE 19898 October 17,2003 ASH027176 EXP015741 Year 2002 Air Dispersion Modeling Analysis October 17,2003 Page 2 1.

AR226-2445 l"^"?"

FOR DU FONT USE ONLY AR226-2891 Copies Co E.

AR226-2996 .

AR226-3102 DoPont-1712 HASKELL LABORATORY FOR TOXICOLOGY AMD INDUSTRIAL MEDICINE H'21946: STATIC, ACUTE 48.HOUR SCREENING TEST TO Daplwia magma PURPOSE; This is a raagsfindiag study designed to provide aa estimate of aquatic toxicity using fixed test concentrations and data measiaeineots at predetermined intervals.