NORTHERN KENTUCKY OFFICE SUITE 340 1717 DIXIE HIGHWAY COVINGTON, KENTUCKY 41011-4704 606-331-2838 513-381-2838 FAX: 513-381-6613 DAYTON, OHIO OFFICE SUITE 900 110 NORTH MAIN STREET DAYTON, OHIO 45402-1786 937-228-2838 FAX: 937-228-2816 R o b e r t a .

A fL a a _ 3 T 2 7 # Ui \ DuPont Legal Andrea V Malinowski, Es.4-^ 2h l o: 5 9 Wilmington Office Buildings 1007 Market Street Wilmington, DE 19898 Corporate Counsel DuPont Environmental 1007 Market Street & fy o 10 6- 743^ Wilmington, Delaware 19898 Phone: (302) 774-6443 Fax: (302) 774-4812 E-mail address: Andrea.V.Malinowski@usa.dupont.com CONTAIN NO CBI 3 CTJ CT** C-- 6 January 2006 7 \f r VIA OVERNIGHT MAIL TSCA Confidential Business Information Center (7407M) EPA East - Room 6428 Attn: Section 8(e) U.S.

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Katherine E.

KStaatfhf eVriicneePEre. sRideeendt, Ph.D. 3SMafeEtynOvirpoenramtieonntsal, Health and 96PS50tO.10PBB7ao7uux8ls,h34M33A3N3v13e51n5u1e3, 3B-3u3il3d1ipng. 142-2E-26 %Er'tL-(y707-& 3 72> /tezz -37^6 L# Certified Mail June 6,2007 DEOUW12PSfoaf0Acis0EcuheEPmiPnAaoeegsnfnttnotP-snPoyRlrDllovuoCcatoeinmos2insa0i64nPA46gr2v0eC8ev-0neeA0unn0ettttie1noNr:nWSaencdtiTonox8i(ces) CONTAIN NO CBI 89070000329 9 o ; o o o (T~Y NO CBI f- < Re: TSSulCfoAna8t(ee-)baSsuebdstaanndtiaClaRrbisokxyNlioct-ibcea:seSdupFpluleomroecnhteaml tiocaDlsocket No. 8EHQ-0598-373; To whom it may concern: t3oodddlhiMobeufmyftsjrsereiiepontrrcseemrigtddicionvi,egfnfgenteuer0tsafon.ltt1oyncafhlsttetloriiihoeooereiwcnnnsf0efti.sasine3vettncguufemdtfddsdeeyyglxcoaa/ptwcikfdnootgeaarsnrx/satudaipfmorttatoosenyofsciodutdnaooefrinandrettldehdaornreuscmenohctpmititomvonerwoirdeeatttsyethtofeudheranrloerntnamptatdiponoltohhtaaPtaaeaennnFsbndsyhOoititiirununSgaamelaehlodtueo(inupgrsofoatreanPittrvdnaoFfiaogllxnOugstigeohcemSe)ryoeaostrdfloftooefaecie1stivditc.n.oa0etdsnlnomuitenapcatgesnmuF/udskn1el.g-fenlgoa/uEtdencarxantoalaypettnteoorieoaoxs(untnuPiirclo,roFyenaetOoanftoofSxdvefi)fcPect.sotriFpstyTyOriihnSnaengdat Tom0eamnv.bi1eimdascm,elrveu0roo-ava.sm3rgtacyi,itooanioeontpaervnsildca1pwbl.feau0aeextatemrmatteneimaocrgclynyi/eonk)sn(agrFwwdat/iOtdueoesacrBrnewytee)oee,dpdvfr,aeueatcrrahlfoiaunyonudadrrgtmsometiigindiedcned.dssiis,.stcTtattaaehhtItrinroyytoelrrrenadsoodirioapdddenofisdtsctppiateohortslhunynlsr,csispouitebcurum,roargalelloihiPdnfaceFelnowravOdamceetStlifoiaoougttdpnionhoamrctaintlaaesiyodncsnatnadtbiyyv(ywp,bi(otoaaeLytlrnrea,aDednnla)otengaivp2adnaarl0avell.lnaeupygaeausrueFttineisruaadionnoltpcgvfsdateiTotiaaphosnSanoedHrlaaolletgliveoievcnlaesllso.f FapbfeaoToainfctynabuhntftdtsrneediemPievccribnmNrenittaucvtisgteyDoywteesamwndrcebinao1enoorlilar3reenrutel,yochntnmtbho1eltroaissa7eamnFPen,aoladreFiitg2tnvtmhs1OeemmdaesdietSroenaainio.talrtnoedttennh6sMeswbape1atclaroi.garaatn1beshteird.eTtnaa0tnraiPsthfcnatwnemFeeeltademrarOeigly-enliw/raSgbkdewptlho.ehgelaatdaiesey/,rgItdryanedehln(amedwPutuyannreNamdeeogigttnfditeDbrfghcagiroeethh,)tsicutrt,otaoaht1spnsonsire7ntwg,fa,owampetsrnrewhasirtrecdelethemensoi-trenhetmdohrareTeoetnaiwposncfbSdaaprerbi/FHnreortoaea]ueancrdilsoamnsatnpetiritnciovvdooantroiehslegPtwptetnyayh-FsrtesirweeotOeiosohpnsecirtSuid,ahoensft-nteisniergattawiechmotntllliaueetigasaamnssrrttlelrtidepesemcpdeaesenahann.rxiltcrinidvsoalcsPagititdioraotnFigoasonmliaOnocbnntnwibragimSfyolalueyii-lcetnrlrdoyaaetnedgorh,tnltrosuaavioclwanretntaeueygtaaegwpederifrimr.nnfeennleiraoetanechlvltgtoeeerld / 3S| P-2 t1h.0e hmiggh/kegs/tddaoysedocshaogseengrwouasp arpelpartoivperitaoteclyonetfrfoelcstidvueriinngptrhoedulaccitnagtioann pefefreioctd.inTmhaisteirnndailcraattess. that tAohnletgho8oi(une)gghdwotohcrkekseetbadysaUtaa.Ssdu.opEpnPloeAtmmteoeneattstsothepsesre`fsvluuiboosurtosacnshutiebamml iricissaskliso'.nresT.phoerrtienfogrteh,rwesehoarlde,pwlaecirnegcotghneiszeerethseults in Trwehiplelorbinte-ilsfiofperewnpaodrridntiegodnintoocfltuhthseiiosEnsPtoAufdoryensicsuelctiostmfirsporlmeecteeainavanelddy.saisdroaffpt hfianraml arecpookrint ehtaics bsaemenplperso.duTcheed.finTahlerefpinoarlt (I6f5y1o)u7h3a7v-e13a7n4y.questions or need additional information, please contact Deanna Luebker at Sincerely, ^ KStaatfhfeVriincee EP.reRseideednt, Environmental, Health and Safety Operations

3 Environmental Laboratory E05-0210 Interim Report#15 Interim Report #15: Analysis of Water Samples from Northern Alabama Potable Water Systems Study Title Analysis of Perfluorobutanesulfonate (PFBS), Perfluorohexanesulfonate (PFHS), and Perfluorooctanesulfonate (PFOS) in Water, Soil, Sediment, Fish, Clams, Vegetation, Small Mammal Liver and Small Mammal Serum Using LC/MS/MS for the 3M Decatur Monitoring Program Data Requirement EPA TSCA Good Laboratory Practice Standards 40 CFR 792 Author Michelle D.

CXR Biosciences Ltd.

3M ENVIRONMENTAL LABORATORY REPORT NO.

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AR 2.3.6 - 0% 6 B IO D E G R A D A T IO N (BOD/COD) T E S T S U B S T A N C E __________________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which m ay a lso be referred to a s P F O S , FC-95, or a s a com ponent of FC -20 6C E . (1Octanesulfonic acid) (C A S # 2795-39-3).

ENVIRONMENTAL ENGINEERING LABORATORY AQUATIC TOXICITY DATA SHEET TVP T e s t C M a t e r i a l T e s t e d f<2-9S~ O - f Z~g3 T e s t O r g a n is m ]*Iaa/QiJ /S iftfAjL A vg.

Larry R.

Internal Correspondence dc: V.

Medicine, Health Physics Industrial Hygiene, Toxicology 3M Medical Department 3M PO Center, Building Box 33220 222200--22EE--0022 f t !

3M Environmental Laboratory AlWo e-os-ftyo M ethod Determination of Perfluorooctane sulfonate (PFOS), Perfluorooctane SULFONYLAMIDE (PFOSA), AND PERFLUOROOCTANOATE (POAA) IN W ATER BY LlQUIDSolid Extraction and High-Performance Liquid Chromatography/Tandem Mass Spectrometry (HPLC/MS/MS) Method Number: ETS-8-154.0 Adoption Date: Author: Kristen J.