AR226-2646 00 01 05/09'02 13:51 ' .< .

AR226-2655 -& 01 AR226-2655 ISC Modeling Methodology and Results Introduction This report summarizes dispersion modeling that was completed for the DuPont Washington Works facility to demonstrate that the emission limits included in the form R13 permits (815E, 1353B, 1953B, and 2365C) comply with the C-8 assessment oftoxicity (CAT) recommended airborne screening level of 1.0 ug/m3 at the property line fence.

AR226-2667 57 AR226-2667 Particle Size Measurement at Washington Works Draft Test Plan March 2004 Table of Contents I.

AR226-3034 S&SKSEA LABORATORY VOS TOSZCOLOS?

CONFIDENTIAL AR226-3110 DPT478/992105 This report is ecmsiderea^!

RAR _ SUE 400 AR226. 3218 -_-- wDuPeonmt.9w05w7 TRADE SECRET Study Title H-25183: Static, Acute, 96p-rHoomuerlSacsreening Test to Pimephales Laboratory Project ID: DuPont-9057 AUTHOR: Alan Samel, M.S, STUDY COMPLETED ON: January 16, 2002 -- PERFORMING LABORATORY: EH.aLskedlulPLoanbtodreatNoerymofuorrsHeaanldthCaonmdpEannvyironmental Sciences NElekwtaornk,RoDaedl,awP.aOr.e B1o9x71540-0050 PS `CompanySanitized.

ARR26 _ 3235 a7 | 512045a1G6ovSaugbeehSrronyi iTnoRxaitcith OneGenrnion Repro Evalions AR22DR6euvr-iosnetd35P3a28g6e35 `TRADE SECRET Study Tide H-24516: Subchronic Toxicity with One.9G0e-nDearaytGioanvaRgeepSrtoudduyetinonRaEtvsalustions Revision No. 1 Volume 2 of TEST GUIDELINES: U.S.

423 -- Haskell Laboratory for Toxicology and Industrial Medicine April 5, 2002 M226 _ 324 TO: Study in Rats Ca G.

AR226 - 3254 466 tHLt2eS7G6r7:omnAelpnSaaln Cmrsow ad row Rat capricorn STUDY INFORMATION Substance Tested;(m-- Synonyms/Codes: -- i) Haskell Number: 25767 = AR2R6- 3284 oDurwon e123n02 Known Impurities: None Physical Characteristics: White liquid dbserved.

AR2%G - 2296 a7 TRADE SECRET Study Title H-25435 Repeated-Dose Dermal Toxicity 28-Day Study in Male Rats AR2R6 - 3296 DuPon11574 TEST GUIDELINES: U.S.

AR226-3064 DuPont HLR 904-96 BASKS&L LABORATORY VOS.

Protocol.PFOS: A 7-D (Lemna gibbaG3) PROTOCOL PFOS: A 7-DAY TOMCrrY TEST WrrH DUCKWEED (LemnagibbaG3) U.S.EnvironmentaPlrotectioAngency Series850 -EcologicaElffectsTestGuidehm OPPTS Nunber $50.4400 3M Lab RequestNo.

Data from Fathea saltofPFOS inIP ACUTE TOXICITY TO FISH TEST SUBSTANCE Identity:PerfluorooctanesulfonatAem,monium salt;may alsobe referred to as PFOS NH4+ saltor FC-93.

Attachment A Comments On The Water Samples Sent To Exygen and Axys Analytical Services Ltd.

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