LDDa.iVrre.rcMyto.R,rP. hJo.Dh.n,sDonABT September 19, 2001 C3MorpMoerdaticeaTloDxeicpoalrotgmy ent received OPPT CBIC - o te 3P66SlrM55Otj.11oPhBC77nao33eusx3n3ol,tn3e9M1@r327,21N7mB2830um5OFi5lmadf1xf.i3icnc3oge-m30222200-02-E-02 U4CDAOW1ESfto0tafcnRisEcu:MhTenmiInSvoFSegiefnrIttcorEoTtteninDPoeom,trxn,oDMiecSc8nCeAW(tSesaI2us)lLi0bCPn4sgrot6oao0Ctnrecedcenitnsitoeanrto(Ar74g0e7n)cy 2001SEP 26 AM: 55 SeHQ'09o(-msx3 RPeer:flTuoSrCoAbut8a(nee)sSuUlfBonSyTlAFNluToIrAidLe:RCIASKS#N3O75T-I7C2E-4(SUPPLEMENTAL) ON: Dear Sir: fr3drksinnelecaMneusshryuoooueasrwrehlllo/tivanwandstetos.eie(dwoxTce(PniebokPScrByn)siBCe.ttdSytuSAwhuFAdFaeciy8ntt)athneesiai(midesnlTnSloxaaSurctlnlaeCbi2sdotavss8aArteetmey-aaxldd.snt8pa.atecolnyTioasCelShierlnumlueedciRrpbnoeiftitseinutossctoa.nktaarxtPcnlaNiTdBtttcsiioihooiaSiotsgetlnyFneinacRsmswleienio,xewosahfckhdsbeah4iasrNlrba7teaeeein,rotptdivoeitoo1siabdc3m6nrtste0i2ceeos,lordtaJindvunfunaiaedilandlctdyyceab4atdlewa1i7oamt9sS9itrni9telogehypr9pufny)popstisemnreeaacmrnnttiofhhdd(nlbni6uehseihshonarienirrslsx2soeaatt/ep8tuobdrin,orpouaaotstanty2uatwt,ao0hnrtco5ixe0oetuxih0slactoiu)enic.gltdifyitocyhinasalydnl ot fic3nolModrtuPhhsBiatnrsSgiaFe,ls.ahtn3aydMbglliioesuhncsaeeeldspePraxaBwhcSatoiuFcrsektsspa:vlfaesecnuleytpipleaalxsitiepaodonssaiudtierruerrleiilmnismgpitiicertahd(ta8oirn-rghytiernprgTmr.oWetdeAcia)titoeonfw,0ic.t1hhemtmhgei/cmfaol3llpo(r0wo.t0ien0cg8tivpepm) =r*o <^> Please contact me at 651.733-9218, for further information.

ft HcKG -- I 6 6 LABORATORY-SCALE THERMAL DEGRADATION OF PERFLUOROOCTANYL SULFONATE AND RELATED SUBSTANCES TEST SUBSTANCE________________________________________ Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or C8F i7S0 3'K+. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassium salt, CAS # 2795-39-3).

3M Specialty Materials 3M Center St Paul, MN 55144-1000 651 733 1110 im r " c -

TAFT, STETTINIUS & HOLLISTER LLP NORTHERN KENTUCKY OFFICE CLEVELAND, OHIO OFFICE SUITE 340 3500 BP TOWER 1717 DIXIE HIGHWAY COVINGTON, KENTUCKY 41011-4704 425 WALNUT STREET, SUITE 1800 200 PUBLIC SQUARE CLEVELAND, OHIO 44114-2302 606-331-2838 216-241-2838 513-381-2838 FAX: 513-381-6613 CINCINNATI, OHIO 45202-3957 FAX: 216-241-3707 COLUMBUS, OHIO OFFICE DAYTON, OHIO OFFICE SUITE 900 110 NORTH MAIN STREET 513-381 <2838 FAX: 513-381-0205 21 EAST STATE STREET COLUMBUS, OHIO 43216-4221 614-221-2838 DAYTON, OHIO 45402-1786 FAX :614-221 -2007 937-228-2838 _ vrVwV WwiiwQ I.UtaCfIti law.com SBHC^oW^-ooZ'IJiFAX: 937-228-2816 Ro b e r t a .

BACK TO MAIN 3M FLUOROCHEMICAL SUBMISSION TOXICOLOGY, EPIDEMIOLOGY AND MEDICAL SURVEILLANCE November 2001 Click on Study Title to View Report November 28, 2001 "H18636: Slide Review of pancreas lesions from DuPont APFO Study," E.E.

1UL&.2.G - 6bQ If fl L_ Barbara Leczynski 05/05/2000 03:37 PM To: Karen Lannon/DC/USEPA/US@EPA, Mary Dominiak/DC/USEPA/US@EPA cc: Subject: followup to perfluorochemicals meeting on April 28 -------------------------Forwarded by Barbara Leczynski/DC/USEPA/US on 05/05/2000 03:31 PM Charles Auer ; 05/05/2000 12:03 PM ro om~ov i JHS- -o zx ro cn CO <=>za ~ ~~ oo om --rn O pq OO To: dchakes1@mmm.com cc: bob.sussman@lw.com, Oscar Hernandez/DC/USEPA/US@EPA, Neil Patel/DC/USEPA/US@EPA, Robert Perlis/DC/USEPA/US@EPA, Barbara Leczynski/DC/USEPA/US@EPA Subject: followup to perfluorochemicals meeting on April 28 Dear Bill and Dan, 3M, We found the meeting very helpful in furthering our understanding of the situation with regard to PFOS and other perfluorochemicals.

AR226-2211 tt Ron J Buchanan 11/06/2001 07:07 AM To: Roger J Zipfel/AE/DuPont@DuPont ' cc: Robert F Pinchot/DEV/AE/DuPont@DuPont, John A Wilkens/AE/DuPont@DuPont Subject Re: Mulit Media Consent Order APFO data requirements || Thanks for the info Roger, could you send an excel spreadsheet showing the isotherm data and data plots you have??

AR226-2257 /F Steven H Swearingen L' 02/20/2002 09:43 AM To: Debbie J Mu Irooney/AE/DuPontSj'DuPont cc: Robert F Pinchot/DEV/AE/DuPont@DuPont, Todd M Krieger/AE/DuPont0DuPont Subject: Environmental Impact Study Several months ago for Rob Pinchot you did a screening study of ground level exposures for APF0.

AR226-2270 GIST MEETING M arch 5,2002 Dave Watkins, chairperson, called the meeting to order at 9:15 am on March 5,2002.

AR226-2286 Frank D Sm ith 05/13/2002 08.-25 AM To: Catherine A Barton/AE/DuPont@DuPont cc: Kenneth N Wood/AE/DuPont DuPont, James F Riley/CL/DuPont@DuPonl, Craig L Bartlett/AE/DuPont@ DuPont Subject: TEFLON AT SPRUANCE Cathy FYI Frank Forwarded by Frank D SmrUVAE/DUPont on 05/13/2002 08:24 AM - W . sidoros J Zanikos SfisiHSHMarai To: Michael R Liberati/AE/DuPont@DuPont cc: Andrew S HARTTEN DuPont, Frank D Smith/AE/DuPont DuPont, M ichael J LukasODuPont Subject: TEFLON AT SPRUANCE M ike, the screening levels have been set in W VA as part of the consent order.

AR226-2513 l Andrew S Harttcn 04/01/2002 11:08 AM T o : Hidetaka Hiromatsu/PO/DuPont@DuPont c c : David M Rurak/AE/DuPont@ DuPont, Seiichi Tanaka/PO/DuPont@ DuPont, V ic E Kleinfelter/AE/DuPor>t@DuPont, Etsuo Takenouji/DuPont@DuPont, Koichi lnagaki/PO/DuPont@DuPont, Kazuaki Suzuki/PO/DuPont@ DuPont, Katsunosuke Kitagawa/PO/DuPont@ DuPont, Kazuaki Yokovama/PO/DuPorrt@DuPont, Susan L Skrotsky/AE/DuPont@ DuPont, Shikiho itaya/PO/DuPont@ DuPorrt, George H Senkler_Jr/AE/DuPont@ DuPorrt, Diane R Shom per/AE/DuPont@ DuPont, Ta-W ei Fu/SE/DuPont@ DuPont, O scar T Garza/AE/DuPont@ DuPont, Isidoros J Zanikos/AE/DuPont@ DuPont Sub ject: R e: A PFO v s .

AR226-2576 GIST Telephone Conference Minutes January 30,2002 Participants Dave Watkins-WVDEP George Dasher - WVDEP Don Criss - WVDEP Dr.

M in - <2743 PA TAT TO RTNOE YNS BU 0LGAW6S LIP Re Hy c P Je i (v ers d 1~ 2-Ol* OEC - 7 PM 58 December 7, 2004 255D M Street, NW Washington, DC20037-1350 202-457-5000 Facsimile 202-457-63'5 www pattonboggs.com SC_ fr.oio ~n pP(2reo0t2be)rer4Dt5s.7oR-n6@o3b2pe0rattstoonnboggs.com JCTO COhffaircleesoMf P. oAlluuetrion Prevention and Toxics (OPPT) UEW12P.Sa0A.s1hECEinnaogvsntitorsotnin,tumDtie.oCnn.taAl2Pv04erno6ut0eec.tNioWn Agency 8EHQ-04-15856 8 E HO 04 15 8 56 Re: TFSuuorbxtimhceoirslsoDigouynP. tPoonhAtaRrVm-o2la2uc6notkaanirndyeRTticSessC.pAFoan8ts(eee)atnoOdEffTPicrAea'nssNpoorvte.mPrboedru4c,t2C00o4ntRameqiuneastiton Dear Charlie: r TDsuhubePmaoitnstsati'coshngeodoofddcoefcarutiatmhineenmftfaoptrertoritdaoul.rcetsiopnonadndtoinEfoPrAm'satNioonvseumbbmeirtt4e,d2w00it4hrtehqisuelesttteforrrevporleusnetnartsy Modified Timeline for Submissions Piminnuoffroodsrriummfaieaandtttii.ootonnItdtaihiscsaccotouuyrsrdosiiuunonrgndostefobfrisetctthaeweniednfeioitnnlilagoEllwtyPhiAarnetgqaytunoiemdusrectelooidnfufenbi:cseeeslnufobowmr DiwttuoePudolbdnytl,iDkteheecreetcimmeibveeelirnt6he,ef2or0er0qs4uuehbsamtseidsbseieonn of pOhnaromrabcyokDienceetimcsb,ears7w,e2l0l0a4s i-nfsourbmmaitsisoinononoffaatlleHanasdkterlalnrseppoorrttsanodn ptorxoidcuoclotgcyonatnadmination dOoncuomr beyntDs eacnedm/obrerre1p0o,r2ts00(u4n-desrulybimngissdiaotna otof boeccsuupbamtioitnteadl baltoaoldatmerodnaittoe,ritnogbseumdemtearrmyined) bOlnooodrmbyonDiteocreimngbe(ir.e2.,4i,n2d0u0s4tri-alshuybgmieisnseioanndofepoicdceumpaiotiloognyal) monitoring reports other than 89050000111/S 89 O 0!

AR226-2803 DuPont-5207 TRADE SECRET Study Title H-24648 and H-24020: Biopersistence Screening 20-Dose Oral Gavage Study in Rats with Recovery Period Laboratory Project ID: DuPont-5207 A u t h o r : Susan A.

ECOTOXICITY PROFILE OF 1H,1H,2H,2H-PERFLUORODECANOL Voiksr Koch1,William R BertP, Robert C Buck2,John Gannon2, Robert A Hoke2, Hiroyuki iwai3, Mary A Kaiser2, Seiji Shinya4, Ning Wang2 Teiomer Research Program 1Clarlant Germany, 2DuPont USA, 3Daikin Japan, 4Ashai Glass Japan -- AR226-3358 SYNTHESIS OF PERFLQROMiNQLS (TELOMER ALCOHOLS} pH,1H ,2H.2H-Perfluorodecanol, C A S No. 678-33-7 (6-2 Teiomer ilcohol) Is an Important speciality Intermediate.