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

CXR Biosciences Ltd.

3M ENVIRONMENTAL LABORATORY REPORT NO.

Larry R.

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

m -OSTOO - /3 7/f Attachments to Letter to C.

PFOS: A 96-HOUR TOXICITY TEST WITH THE MARINE DIATOM (Skeletonema costatum) FINAL REPORT WILDLIFE INTERNATIONAL, LTD.

BACK TO MAIN 3M Company Page 1 of 32 FINAL REPORT Epidemiology, 220-3W-05 Medical Department 3M Company ______________________ St.

Larry R.

3M Generai Offices 3M Center S t Paul, MM 55 144-1000 651 7 3 3 1 1 1 0 P-1 i\ QOlefP. ' 3M September 17,2008 RF'Ct-IVTD J ` I u IL 08 SEP I 9 AH I0-* f 0 Document Control Office EPA East Room 6428 AR- 226 Docket US Environmental Protection Agency 1201 Constitution Avenue, NW W ashington DC 20460 iOOC -.I $ : li 9 VIA Federal Express AZ2Cr38a% Attention: Docket No.

Potassium Perfluorooctanesulfonate CAS Number-2759-39-3 (\ & T & -o 5 6 0 3M Environmental Laboratory Report No.