AR226-2670 0 DuPont Legal Andrea V.

BiochemicaalndinlolecuMleacrhanistiSctudieosfN-Alkyl Perfluorosulfonamides KendaR B.Wallace,Ph.D.D,.A.B.T.

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

[-- rea@taftaw.com> AL 226~ 3F7oy 0 vo STORIE iocec "Biot, Robert A" <biloti@taftiaw.com> TEAC IDEA Taft / ceievrating 125 vears ------ nono CONTAINS NO CBI

Fg o le ehponlineorg _ AP224-3290 | EHENAVLITRHONMENTAL PERSPECTIVES | i| : Private Drinking Water Wells as a Source of Exposure to PFOA in Communities Surrounding a | Fluoropolymer Production Facility i Kate Hoffman, Thomas F.

. : I CLIENT PRIVATE 5] 16 | PROTOCOL TITLE: TR-a6n2g9e5fiinndRiantg HCeyptoattooxciyctietsy Assay of T-6292, T-6293, T-6294.

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

362 | (@ | S| ig3zg] nna ENVAMRDQUITIINAL OOrermssatoionndoerCEonnmoisonCco otDaitpnpoedrDeecpoennes Avanos JEOXIVNITRMT OEMEETNITNo DGIORFECTTOHREACTHET EMICALS COMM= ITTEE AND =r THEWORKING PARTY ON CHEMICALS, PESTICIDES AD BIOTECHNOLOGY i 3 | cooreonErxisaTINtG CiemiocanLs | HAZARD ASSESSMENTOF PERFLUOROOCTANE SULFONATE (FF0S) AND ITS SALTS | <3 | 8] an Zo | Z=z 333 || = ao Hi aToot3sen E onan Tm AT S m a oie ENVAMRD(2002)17FINAL Preface hMInuemmthabenermhaercagoluitnhntshraioezfsartadhegsroneiefndtphetromfelieunotfrioonrogmcatolalfnyethwseouTrlfakosntkaotgFeeot(rhcPeeRrOotSno)cEtxooilslpteritondgiunCcfehoearmmiahctaaisloansrdo(2ans9s-te3hse0smeMennavtyi.ro2Tn0hm0ee0n)dteaseclviessronandl Sufesocelrleootfwaeridtahttehsaeesascinhsnteoimunignccabelysmerebnqetugbeisyntniainmngagjreioanrdi2Ul0y0S1a.mvaaiTnluhafebalecUteSuxrpaeon-rsdu3rteMhei-ntUfooKrmgalaotgbiraoelneldyfrptohomaslMeeeaodmutbtehtehrecamcoatuinnvtuirftiayecstwuiartsehsaetnlhdle as fiom non-Member counties through IFCS, An informal meeting was hostedby he US on 26-27 October 2000 (Crystal City, Virginia, US) to: +relveiamewabtohuetcaucrtrieonntssbteatiunsgotfaaksesneisnsmotehnetraccotuinvtitieess;; and + identifyplannedorongoingwork on this issue. sInumpmraerpiaerastoiofnkefyorsttudhieesm,ettoigentghe3r Mwitchirecxuploasteudreaindfraofrtmaitnitoinal assessment report including robust study BiMAoetttmehbceehnr3o1c"looJugoniytnit(e7Ms-,e1e0tthiNisnogavceotfmitvbiheteyrCs2hh0eo0m0ui)lc,daiblteswauCnsodamegmrrtieatekedeenthaaurnn,ddsetirhnectehWetoherixksiiswntiagnsgPaaCrmhtaeytmtoiencraoClhfsesumPfifrcioacglirsea,nmtPmemes,etircoeivdseers1saeane1dn PbryotghreamTmaes.k Fore.

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.

PI, "00s C2e5n30TiorEuDsW2A3L31 83s RETURNRECEIPT REQUESTE iUNoErKbeamneeWnensDtWieset rVinrgiinl FRoaweb'sb,ogW3Y77 26101 ESo- PanWaYg24,2-21 ve AR226-1627, .

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.