BIOCONCENTRATION - REVISED AR226_ 1108 TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,2.2.3,3,4,4,5,56.6.7.7,88,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) sRuebmsatraknsc:eisSaamwphlietefrpoomwd3eMr.pPruordiutcytdioentelrotminnuemdbteorb2e178.6.T9h%ebtyesLtC/MS, "H-HMR, "F-NMR and elemental analyses techniques

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ARRR6 _ |248 [con -- TSCA NCIC NOTIFICATION FORM FOR CBI DOCUMENTS | DOCKET NUMBER: AR 226 DOCUMENT CONTROL NUMBER: 2230000007 DOCUMENT DATE: _-- DOCUMENT TYPE: 3-24-02 DocttF Zn e3z2 = 5% = 38 5 5s THE DOCUMENT REFERENCED ABOVE IS CLAIMED AS CONFIDENTIAL BUSINESS INFORMATION.

WATER SOLUBILITY (BY ANALYSIS OF TOC) ITEEsSTTSSuUBBsStTANNCCEE 000 Identity: PPeOrSfFl,uoorrooFcXt-a8n.es(i1f-oOncytlafnleusoruildfeo;nmyafyluaolrsidoe,be referred to as 315.172)..2.3.3,4,45,56,6,7,7,8,8,8-heptadecafluoro-, CAS # 307- Remarks purity.

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Hydrochloric acid (HCl) (various concentrations) Typically used casing material PP, PE-UHMW, PVDF Typically used impeller material PP, PE-UHMW, PVDF Typically used secondary seals Options after PFAS-restriction Used casing material Used impeller material Used secondary seals Consequences without PFAS EPDM, FKM+, FFKM PP, PE-UHMW (lower temperatures and concentrations only!)

Request for Derogation or Exemption for PFAS Fluoropolymers Used in Gas Sensors 1 Contents List of Abbreviations and Tradenames .......................................................................................... 3 Abbreviations ...................................................................................................................................... 3 Trade names........................................................................................................................................ 3 Background ................................................................................................................................. 3 Who is CoGDEM?

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AR226-2431 INTEROFFICE MEMORANDUM Date".

AR226-2715 2 AR226-2715 DRAFT DuPontWashmgton Works Occupational Blood Monitoring Program for PFOA Preliminary analytical results from new employee serum samples.

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AR226-3090 HASKELL LABORATORY FOR TOXICOLOGY AND INDUSTRIAL MEDICINE H-23005: STATIC, ACUTE 96-HOUR SCREENING TEST TO FATHEAD MINNOWS, Pimephales promelas PURPOSE: This is a rangefinding study designed to provide an estimate of aquatic toxicity using fixed test concentrations and data measurements at predetermined intervals.