Document bBX5p6nvb28pe8MdzJ3X6n1X3

` Spey SSmioles1c000 3M Specialty Materials 3M Center SL P~ul, ~ 5514d-J000 651 733 11~0 MMaayy?7,,22000033 BV] BLADER BY KAND DELIVERY DW Wiararerdcdtenoeerrr,GGC,h.ePPmeeinncbbaeelrrtChtoyyntrol Divison UDOOfSiffrf.ieicccEeetonoorvf,fiCPPrloohllnelumumtetiiincooatnnl,s, CPPPrrroeeonvvtteeerocnnttltiiiDooonnnivA&&isgieoTTnonoscxiyiccss AUA1r2.rS0ice.0lEPRRneiionvosnisrsoBBynuluimvilaldedniniinntaagg,lA,Pv7Tre44on00tue5SecMM,tioNnWA.gency W1a2s00kiPnegnonrs,ylDv.anCi.a A20v4e6n0ue, N.W. Washington, D. C. 20460 Re Follow-up Questions Regarding 3M and Dyneon LOIEnviropmental MonitoringCommitments Follow-up Questions Regarding 3M and Dyneon LOI Environmental Monitorin8 Commitments DearMr. Pesberthy Dear Mr. Penberthy: more detailed dTTehshicirssillpetetiteoenrrroeftsephonsednsvptioorEoEoPnPmAAe'nn'sstarrdleeqqmuuseaesistttiionnryynooguurrceoe--mmmmaiaitillmddeaanttteeddcAAopmprariiilln33e00d,,i22a00t00h33e fMfooarrraach 13,2003 3M Letter ofIntent (LOY. In addition, EPA hs requested clarificationoftho plans for more detailed description ofthe environmental monitoring commitment contaiaed in the March 13, 2003 3M Letter oflrttent (LOI). in addition, EPA has requested clarification of the plans for pmp`ccoaoaognngnettiieti7rt,nu,iuetientddeegmmmmpooln33naionoittsfofotrtrbhhiiynenepggLLlooOaOffnLIgg,.rroaoTTunuhhndinidssdswwllaueetamttelttmeererarr,w,rwissyliuullrrlcffaddaalececesseenccdrwwraiiaabrbteteeoe::rfrm33aaoMMnnn'ddi'sostoteoethhnnreevvirrinierrgeononnvnpvmmilierarenoosntnn.tammalelenetnetstsaattllmmmmeeetetdhdhioioaaddooooluluoottglgliyiynn,,eedd oonn monitoring plans by plant, and mlmmary calendar of monitoring plasm. extensive envirAAosnsdmdeeesnsctcrarilibbmeeoddniiinntossreeiccnttgii,oonninITJclAAud3iinnigntshtehemep33lMMinLgLOOiTnI,t,h33MMvhihaciasnsiaatkylroeefaaddtyyseennnoggawaggfeeoddrmiineas PFOA p`perxrootieddnuudcscittviioefonnonfftavahccieriilorilmteiyntasaeyttneDDtraeelcocamafttuouPrnr,F,itAAOoLrALi;n;agaan,nndaianlltycyhslsuieissdroiconfofgsnssesetarriumutmmpunliaatnnnsgdd iilanivnvtedehrressspvauoimncmsippnolliretsisynffogrofoaimmtMsuffnilhso-hw,C, ibbfitiordrydmssSeaatrnnuPdddFyooiOtbnhAeerr `which variety ofenvironmental compartments were analyzed. These data se available trough wildlife for the presence ofPFOA and other constituents; and sponsoring a Multi-City Study in which a variety of environmental compartments were analyzed. These data are available through tthhee OOPPPPTTSS AARR--222266 ddoocckkeet.t. a3M plants in33CMoMt'tsaeegnnevvGiirrrooonnvmmee,ennMttaaNll mmaonondniitDtoeocrraiintngugrcc,ooAmmLmm,iiwtthmmieecnnhtt wiinnerttheheefLLoOOrmYIeiirssmttoaonccuoofnnaticitnnusureeinssagammpplliinngg `calowtaea3tasMitlieoownpnalsstaoenorftfsmPPoiFnnFiOOCtAAoorttaiaannngddgePwPGOOirScSoFvhF-e-b,bcaaM ossmeeNeddsapppnorrdoondddDusucectwctsisa..ttuhTTrh3,titA'issLsss,aavwmmophlpluilicninnhtggawrwwyeirilclellofmiinonmcrcimllutuedmdreeemnggtrarsonoauuunnnfdadd/cwowtartttaretpienrlrganannsdd wesatsatbelwisahteedr rmoounigtohripnegrmwihtsicwhictohrlroecsaplonrdgselwsiothr.3M's voluntary commitments and/or plans established through permits with local regulator~. iihnnacctlluucddoeenttthihneeucceuusrrtrr"ToeeThnnhs:eeteoeoepnnpAevverPiriararFottoOiinnoo,mmnnestsenhntooetaffaalDlDmymmynmonoeroenoiorinttn,oio,rrmwwinihhgniaiccliihnhn,t,othaafhe5sevPiceFvuxiiOcppnAillinaa,tiiitnyniyeedoodtffhiien33nMtM pthhr'eeo'ssd33uDDMceMetccaiLLatoOtOunuLorIr,,,,fiiAAsfsLLu.apo5p3rlMloaMapnnotsstluvuwyibbmielsleiilrddsiia.rryy BBtsheieaccctaacutuohsseneetciDDnayuvynienersoeonotno'nm''uessnsUUet.a.SAlS.P.mFflolnOouiro,tortoohprpeoiolnalgymymmsmeteorornimmiaucanmnuoufsefsaaclacttttuouririisPnntFfgghOyffaaALcciO,illYiiinttyycthosisemllmpooircctoaamdtteeuedndcttooisonnnw33ioM Mllf''fbssleummocaraononnfpudaofucalcytctmtreuiedrnirnsg.g. site, the environmental monitoring studies to satisfy the LOI commitments wil! be conducted Exhibit 1898 WIda~dcta~ AAv~aiill~ahhli~a hhvv RAMM ffnorr IInnasnn~acr~htiinnnn ~anncdl C~annnvviinnng a~s C~o'.nnfnifidcetn~tnifia~ll IInnffnorrmmm atfiinonn" 11889988..00000011 AMANNARRAA? 3aMMAAo0008B8B8334422 : rEg Jj`oomiiennttthlloyydaasnndddesrreceprpioobrrettededdbbbeyylo33wMMa..reHHfeeornncbe,o,ttthhhe3e MssttuuaddnyydmmDeyetnthheoooddnoo.l]ooggyy,, ssaammpplliinnggssttrraattceggyyaanndd aannaallyyttiiccaall method~ described below a~e for both 3M and Dyneon. = ach year, with`DDtaahttaawfwiirlsitlllrbbeepesosurutbbmiminbtittyteeAddumagnomnusantlall1yly,i0in0n3ff.iinnaallrSreaepmppoolrrittnffgoowrrmimlaalttbabykytethhpeelafficirressttmooofnftAAhuulygg,uustsooftf qp`eqrauuocaadhrrutteeycrretllaiyy~o,,,nbbwaiiaaintnndhnnsutuhiaagellnllifyyfirimascntaaddnretbbpirioecernadtnnuiicinatalilbloyyyn,,oAaafssuugddseueesssocctrrf1iib,bPe:e2Fdd0O0iin3nA.tthihneeSDatteemecxxpatttlbbiuneergll,oowwwal.i.llleIItnnnavklliieigrgophhtnltaomoceffen33tmaMMlo''nssmtohppnlhhiyata,sosere-i-nooguu.tt of upu1nnr,odd2de0eru0r7ctt.thhieeonLLOOanTIdiisssiaagnnnttiiifcciicippaaanttteedrdettdooutcteetirnommniinnoaaftteeubsbeyyDoDef ePccFeeOmmbAbeerirn 31, 2006 Decatur, 31, 2006 wwailitlthhenaavffiiirnnoaanllmrreeeppnootrartlt miinnobbynyAituAogruiunggsustt 1, 2007. WTTEAESTSTTEMRME.ETATHNHODODWDOAOLSLOTOGEGYYWAAANTNDEDVRVAEALFLIFIDDLAAUTTEIINOOTNN:: GGRROOUUNNDD WWAATTEERR,,SSUURRFFAACCEE WATER~ AND WASTE WATER EFFLUENT `A.AAmnniadlayesti,lcaalyTnTdetesSstuitlMMfecotenthaahtooedlds::Tn33WMMatEEeTTrSSB--5y8--11S55o4l4.i.1dI P""hDDaeestteeerrEmmxitinnraaatctiitooinnoonofafPnPederrHffiulugoorhriiPnneaorttfeeoddrAAmcaciniddcsse,, LAAillqccuooikhdool]ss,, A(ECTChmShr:riod8ome-ms1aa,1tlom5og.agr1darpSaahpunyhldffyoM1Mn5aaa5ss.tess1s,SSipwpneheciW ctctrrhaootmmeaerreteBtrrryyye""fS..eorSSleieendeecPeAAdhttatitasnaechhciEmhsxtmeoternraintccILtt..tioe(s(nt'NNaodonoltdceeuHttmhheiaagntthtttshhP.iises)rttfeeosstrt mmmeaetnthh~oodLd issquuuppieedrrcceeddeess ETS-8ol Ii 1 and 155.1, which are referenced in historic test doouments.) `VaVnaaallliiyddtaaittciiaoolnn:p:rToThchieisdsussraaemmfpoplliinnthggeaadnneddteaarnnmaaillnyysasitissiommneoettfhhPooeddrfwwlaau~sorvvoaaclleiidtdaaattneeoddstffoeotr(htPheFeOccAoo)lllleeiccnttgiioronno,u, needxxwttraraatccettrii,oonns,,uaarnnfddc.e ater, and drinking water samples. Method accuracy 10%. Method precision +10%. analytical procedure for the determination ofPerfluorooctanoate (PFOA) in groundwater, water, and drinking water samples. Method accuracy +10%. Method precision +10%. surface M`MaenetatlhhyootiddcaSSluufmmcmimlataryry.v.:PWFWaOatAtee/rrAssPaammFpOplljeesss eaaxcrteeracccootlllleeedccrtteeoddmrf4roo0mmmaaLswsiiateetoeofrfiisnnatteemrrpeelssettsaaunnsddinsshghiiCpp1ppe8eddsccolooillddd pttohoaaesrnet eSaexcnxtpatrarlacayca:ttfiicliieaooxnln,f((aSSicdPPielEEni)tt)yicc.famiPrct'FatrtrOiiiddoAggne,e/sAsa..PndPPFFOFmOOeiaAAss/ieuAxAr.tPPeramFFceOOtnetiidssafecrrloueutmtaeocdd4c0offmrmropoLmlmiwstthhhaeeetedCCr1bs18ya8mhcciapargrltethrrs-iidpd~gegieren,f, gouurssCmiinan1gng8cmmeseoetllthiihdqaaunpnicdhol,la.se ciecSvahecorphomamariatdateoitnogotnrgi,afriapidephdehyncy/tot/itfmaaipcnnoaddtneeieommnnt,mmaain~ssdmsssempsapeesecauctsrturreroodemmbmeyetetcrnroyyt m(a(pHrHeaPPraLLicCCcn/og!MmMtSphS/el/iMMsMShSS)e)draabnnyaalelhyysisgiisshs..o-pfTTpethrhfheeoeorccqmouoannannnccteceinsenttaltriatrqeitauiooitndnioiooofnfn p`percaroocodhdmuupiccodeeueddnnbdtbiiyfynitethadhnaatcetoxccmtoormpmaopcpnotoeeuundnntdcdiatsltooimtbtrhehaaeetsiMuMorSneSdsrtrebeassynppdocaonornsmdsee(poeaofxrftitntehhgreeatqlhqueusataMnansntSidittaararetdtis)oop.nnoniioosnen pporrfootddhuueccqeeuddabbnyytittthaheteie~snaamimoeen compound in an extracted cMibmtion standard (external standard). M TEESSTTE MET THOH DOLO OGYD AANNDO DVVAALL LIIDDAAO TTIIO0G ]NN:: FFY IISSHH AAFlnunaclta~oicclhae]ymTTiects~atltiMMCecot~mhahpooodldu::nd33sMMfEErTToSmS--8V8-a-2r2i33o11u..s22 M""a~StoorlIiiicddesPP"hh.aassSeeeEEexxAttrtraatccattiicoohnnmaaennnIddtLAAnanlaylyssiissooff F|uorochemical Compounds from Vaduus Matrices". See Attachment I'Z ``VVdaaollciidudamateitoniiot~na~:ti1IoS5nO0"G11u77i00d22a55ncAAecccfcrorereddIiinttdeeuddsTTreyes-sttBMMieoctathnhaoolddy,,ti((cvvaaallliiMddeaatttiihoonondbbaaVssaeelddidooantniFFonDD,AAMaggyuu,iidd2aa0nn0cc1ee). This sampling and analysis method was validatedfote collection, extraction, and snalytical documentation "Guidance for Industry- Bioanalytieal Method Validatior~ May, 2001). This sampling and analysis method was validated for the collection, extraction, and analytical Forother caricton speci tDynscn, ete om theSociery ofPlastic Insti(nSsPe) wil sbrcss For other clarification ~peifi to Dyneon, a letter from the Society ofPlastics Institute (SP13 will address EPA's questions concerning theenvironmen siestfucropolymesmahctuin se odthe EPA's questions concerning the environmontal st-adi~ at fluoropolymer manufaetmS~g sit~ and the questions consrmingthe AriesofCommerceTestProgirnyaomu email o SPLThcurrent PFOA question~ concerning the Artile~ of Commerce Test Program in year email to SPI. Tim current PFOA anuacuers will ies he prionsconcen plansforso emmerial onion St of rmmufaeturers will addre,~ the questions concerning the plans for-envirc~nmetaal monitoring at the site of `PFOAmacuifyouarmcat0SeFL PFOA manufacture in your emall to Main Avsitahis by 3M fo Insnarfinn and Convin as Canfidansia Information /dacl~ A~ail~hl~ hv .RM for In~n~etinn ~nrt ~'.r~nvino ~ ~'.r~nfict~nti~l Infocmmfion" 11889988..00000022 AWAonaRRIL 33MMAA00D0888888334433  a pease W~rd~ G. Pe~b~rthy pT"paTprrhhpooeelccieemmcddeaeuutttrrihheeooonfdfdooririfssttPhaahFeeppOddeeerreAftftoeeAorJrrmPmmmiFaainnnnOaacctteeiiionobbnnaaofissosfehef.ddppemmeMrreefeftllttuhhuh0oooorddrodororaoeecccqqtcutauuinairrreeiiinncssgguyuclrcl4forof5sonoss%a-nst.v-eevaMl(a(ePilPtidFdFahOaOtotiSSiodo))nnipinrffeooffcroiottsuhuihroeebbnbibiooiiolol1oolloo0gggig%iicci.ccaaalalllmmmmaaaart~trerciiesxxs.. application of PFOAJAPFO in fish. Method accuracy_+_5%. Method precision _+10%. MeGaMattiteaalhtuh1o1io/6d6odSnddSuhiiulmolummmutimoooagnnra,e,ryyoao;:rarotoAAtthinhnseersmarpmoddiiukiolleuunudtnttiitwoooionnfutfssuhsisahuinmnegpgparelreeepaaipiggssreeppnonrtrteppggrearrixpaadedssdeeu((wwrfaTlaotuteieigrdrd,a.s oddAAiinllnuuattnaaeelalddiil,q,gyuusttiooesuttsmueooifexfststtuhhhhreeeoo.mmoogAgecennieizzteedod,,neeetcc..)) it(d(issAriIaccCunaaAtNsppifopp)ieenerCids]dseh,a,daodmmdNm0iddixoex:eegedd)ddec,aanl,sseaaaaata~nennndditseeppbxuusettpt,rxiaookcdnneitdittltohuhwnteeseisrcocdtoheelwlnnvvtittaheterrenihniffttuawcuapagtgnpeededrrtttoaoo,apslcersaolliioanaardrstisefiee~pforrsyyavvusteterhhssnrseeotdtgoossauutptpphpeerreerroomcnuraiegaptahtiancatnanatitlpt.ey.rtpteteTThh-ihhme<eeoptpirxnrssoaotduututippeertesieeinronm.esnns.aa.eAttdTaacTnnheChtttetoeisnssaSiatmPrmipElpeliee tranfferred to a clean tube, diIuted with water, and passed through a pro-conditioned C~g SPE canridg. Finaly, the analytes ofnecetar luted fromthe SPE cartridge nd analyzed by cartridge. Finally, the analytes ofinterest are eluted from the SPE eurtridge and analyzed by EhiSgNhSpeMrSf)or.mance liquid chromatograpky-lecrospray andem mass spectzomeiey (HPLC- hig~ performance liquid chromatography-electrospray tandem mass spectrometry (HPLC- ES/MSil~IS). CCoottttaaggee GGrroovvee,, M MNN GGrroouunnddwwaatteerr MMoonniittoorriinngg. roofofuvvnaarrdiiooonuutsserrreeggsuuyl"TlsaaTotottoeoddrrmaayyttieepsp,.rrtoonnhgguuerrmmafaeimmerrssr.tsoo,uuasqsTTuhgghiefrerosesorueesunbstndetdudnwideaacaittetsesehrhhsstaatthuvvueddesiieddeessoo,hcchauuaAvmmveeelebnonbetwteeeeeenddrnttccchhoooaantmmtfpai3plnlsseiehhtntaaeegllddlbloeaaowttdwhtuuuhnensedccessoorinntltefifiieinnnnseetsdsdhuueppppoorrtt us`s`gwouonrenuuoclcttulohoshnnncdaaffoinwinnnnddeatedatdddeiiiarasnsqqcsctuuhyhhiifasafetrreergggr.mee.rssoNNiuttsaonoattdthuttuwhrreareeaatflluMMeg~griirrtssiooaisnuuiqsstnnuishddiipewpfwpeapriartietbeeaRRerriinovvflefleeooarrtwtwhaleloiitonphnnnletghgahseenttihtehssse.ihhtssaaeAoolalluuloctltowodhhwweewssrreoynynrsusbbtctleoooedmuunmnnfnidiidosnsaatigrgrnryeeygennpoobeerffrceetatadshhlleleeuynyntssffdiirctereoeo.orm.nlmdi'TeiInnts'hohoieretrohs~ttnhheeest(o0 beyond the sit boundaries. wells contain the groundwater beyond the site boundaries. in the area of the plant site and would not represent conditions Afhluuugoourmsotcc,hhe2emm0i0ic3caalrle`TaapThnnoheazrel]stsyyee0~zsseettssEuudodoPiinnAeellssyyufcrrnoeeadcccesueernsnetettldldhyye..ooLnnOccTTLoohhnneevvsseeeenntteteiitsootnnraraeellssususluluttbbssswswlitalninllccleebbsseeaaiinnndcnlhuhaadlvveeed iiiinnnnccttoohhrreeppoouurrppaaccttoeoedmmdiinngg August, 2003 report to EPA under the LOL waainnlasllyybzzeerddepffrooerrsePPnFFtGGOOaotoAAiii.vnn.eggTToffhofhotreerwhwssaeaeerrllddseei,,cctttfeiiiiovvgonnreooo((uf55fnt))tedhhexeexwissisaeestttwiwieneneglgclloloossnnn-dwws-isaiatitsisteeobbnmmaasas,soreeniddittoooonnrrbiitontnhhtggewehwesssiieoltteulellrshhcwyyweiddilrarlloolnbgdgbenseeaososllanaoommsggpiiopeleuleemmrddoosdaadennaelddlrasann.dd c`wTTohihlmeelssmbeee~nwwrec~elilpllnssrgewwsiieilnnlllt2abb0teei0v3sseaamompfpltlheeedd onsite on semianulbess durin ground water conditions, a semiannual basis during thei.e., ti~e monthofMay and September both source and non-source areas. month of May and September commencing in 2003. `WW asatsetewwatateerrEEfffflluueennttMMonointitoorriinn~g `ppwrraoosccteeesswssatwweaarssstteea"wwnTaTdathhteteeerhsresssiitiggteeennnhdheearsrsiaatataeaemdmdnuuaoalttlrt-gCCi-paopohnhttiataa,assgesebeddiwoGGwlerroosoagvstvietceoe,a.wwlaTTarttwwccroraootmtorrfeefenattahtthmmeeseyssnnsyytttsseplttmelae.mamnnststtAtttlerhhelaasatottfiiiistsnnhuouoesrrsgegtddaaennsttiiotoccettdrreepaarttoalcllelss a`wwwraaassstttteehewwewnaaatttceeeorrrsmssbafSirnrondomemtdhtthewheietsstheehiroodnpopeinesr-maa<tnotiinoootnmrasgcaaatnrrcieeoce,ccloobimminobgblioinnngeedicddasaalttttoraeriamsintnmwggalelleneetrddsii3yss0cscdthheaamtrrhgg.eeenAppdooliilisnnoctthf...athrTTgehheetedrsseee(a0twwetadhasespteerwowcnaeetsersrss MMairesisstsihissessniippcppoiimRRbiivivneeerr.d. with non-contact cooling and storm water and then discharged to the WES ATARI 3 To ncn and Corvin 2s Gonfnial Information 11889988..00000033 waonssras 3SMMAA000O8B88B33444 . fe ren Et uunnddeerr Minnesot`TaTrr~NeaaPtteDeAdEppSrrooPcceeerssmssiwwtaaNssott.e Minnesota NPDES Permit No. wwMMaaNtNtOee0rOr0Oaa0Inn1d4d4n9n9o.o.nn-TT-cchhooenentddtaae~ccssttiicggconnooaaolttliiiionongnng/ss/ssititnnoorrttmhmheewwappetearretemmrriaitatrrffeeoordrdtitihsshcecehhttaarrreregagaeetteddedd p`pwrroaosccteeesswssawtweaarssstteeawwraeat~leiersr,t,enndooinnn-t-cchooennpttaaecctrt mccooioaoltslimnOg~u/tssfttoalorlrmsm DwwaOatteOerr,,, aannSddD0tth0he2e,ccooammnbdbiinSnaDatOtiiCoo3nn,oofrfetsthhpeeescsteeivttwewlooy.. In waaaccnaccdsootaerrndwdaaalannytccseeeirsswwaiaitrttehhOulSSitsefetcacetltdiilooiSnnnDt11Oh..O1e12I2peoo~fffo-NrrNnPciPteDDarstEEaOiSSnuPPptefeeamrrlufmlilstiut,So,rD33iM0nMa0t1iiess,dcSccuuDhrrer0rmee0inn2ctt,allylyasncc,doonniSddnDcuulcc0utt0hdi3ian,ngggrmemPsooFpnn~OttcAhhtl.llyyvdssyaamm. pplInilinngg. and analysis at Outfall $D001 for e~t,qin perfluorMated chemicals, including PFOA. sampling even t."AA 22I44n-a-hhcoocuuorrrdccaoonmmcpeopswoisititteeh ssSaaemmcptpilloeeniss1.cc1oo2lllIpeeaecrtt.eeddofffoorrtdhdueupplplieicrcamatitetea,antnahlaiylssyimssiosnddtuuhrrliiynngga eeaacchh nalysis at t`sOOhauuemttffrpaaellslillunlSSgtDDseOa0vOn0e1d1nta.wwliilllIlolnwbbaeercecccvoooinrnsddidaouunncoccttreeerddwettdihthuhrrcooStuuieggochhntii22on00nt004h41.e..12fTTrhpheeaeqruN.Ne5PPnDDcoyEfEotSSfhePmPpoeenrerimmrmtiiottirtddi,eentfhfgii,insneem~s oaanpptrrhoolccyeesasssnattoloyasasisssseeasssts. the results and allow revision or reduction in the frequency of monitoring. DDeeccaattuurr,, AALL GGrroouunnddwwaatteerr MMoonnititoorriinn~g ofvasious regulTTaootoddraaytteep,,ronmguurmmaemerrsoo.uussThggerroonuuanntdduwrwaaalttegerrrossuttuundddiiweeassthheaarvvfeelbboesweeinnn cctoohemmpsplhleaetlteelddowaattsttyhhseetessmiitteeisiinngemsnueaprppapolorlrtyt frto~hofoevmmsatirtthieho.eeusTssohroueestgheuuwliaenttsvoterfsythoottpitghrwhaoeetgninerooaornmtsrsthshhe.eaatavsTsethtaieanannvddaodtldiuvisrsecaddhalmagnrrrggeoeexus~tntedtnoowsttiahhvteeeerTTcfehleoranmrwnaeecsit~nseeerteehiRzeRiastvihvieoaernlrolaoMlfwosontnsggyetsthstheueembbsbouiosucufngnadedcanaereryyraoolflfy `tchcooennddsiiittteiio.onnsTs..heMMsoeosistntvrroeecscmetingatmtllyyi,,onwwseehccaoovnnedduiunccvttoeeIddva2edddyyaeen tte~rxaatcceeensssttiuuvddeyycththhaaartat cvvlaMelriiidzdaaattteieoddntthhoeefcesaiartrelliiseeurrbsurface h`hyyddlrooggeeooliooggiiccaalI ffiinnddiinnggss aanndd oouurr ssiittee ccoonncceeppttuuaall mmooddeell. analyses addres`TsTihhneegsseePssFttuOuddAiieehssahhvaaevvbeeeiiennnccoocrroppnoodrruaactteteddedffaliunvodorroroeccshhueelmmtisiwcciaallllaannbaaellyyittneecsslouondnlelydyriernecceteahtneltulyy.p.c LLiimmiitteedd oming. AaAnuugagluyus~stte,,s22a00d00d33rerrseesppioonrrgttuPunFnddOeerArtthhheaevLLeOObLIe.en conducted and results will be included in the upcoming analyzed for PF`GOGoAoii.nnggTffhooerrwwsaaerrlddeceet~iiggohhnott f((85t))ehexexissiesttwiiennlgglosonn-ws-asisitteebammsooendniitotoonrriitnnhggewwseilteelllhsswywdirlilollgbbeeeolssoaagmmippcllmeeodddaaennlddand w`waiGnilralllolyubbzneeedrrwdeeapfptorreeerrssPeesFnnatOtmaaptAtliiv.veeesofTofohftrethhsPeeeFlsseOiicttAteeiogganrrnooaouulfnaytsddheewwssaeawtitewelrlrebccllooesnndcwdioiatltisliooebncnasts,se,ediid.t.ewo.,,incbbeotohttaehh yssseiootaeuurr,rhccdyeeudararninonddggennotoohlnnoe--gsJsioouounumrerccoaeednaaedrrleeaaasns..d Decembersampling events. Grouadwater samples for PFOA D~cember sampling events. analyses will be collected twice a year, during the June and WaWsatsetewwatateerrEEfffflluueennttMMonointitoorriinnog CiCtityyooffDDeeccaattuurr33UUMMt'itil'ssliittDDiieeesecs.c.aattIIuunnrr,,aaddAAddliliasttbiibooaannmmmmaaaammnnaayynonuouffffatacthhcteteuurmmriiananngnguufffafaaacccciitltluiuitrtireiienssnggoobooblpptaaeeirirnnaapttpriirooooncncsseessuussttwiilwlaiiztazeeeternnrfoofrnnr-oo-ccmmoonntttthhaaeecctt `ccoooolliinngg wwaatteerr,, wwhhiicchh iis iinn tthhee .s~iittee''ss wwaasstteewwaatteerr oobbttaaiinneedd ffrroomm tthhee ttrreeaattmmeenntt ffaacciilliittyy.. TTeennnneesssseeeeRRiviveerr.. AAllll pprroocceessss wwaasstteewwaatteerrss aarree ttrreeaatteedd. TThhee ssyysstteemmccoonnttaaiinnssbbootthh pphhyyssiiccaalI--echheemmiiccaall aanndd. bbdiiiooslloocgghiiaccaralltgotterrteehaattemmTeeenntn.tn.esPPrsrooecceeessRssivwewraa.sstteeTwwhaeattederirssscaahrraeermmgieixxieseddpewwrimittihhttnneoodnn-u-cncoodnentrtaacActtlcacoobooallmiinanggNwwPaaDtteeErrSpprrPiieoorrrmttioot NNcdooios.n.cthaAAcaLtLr0g0c0eo00ot00ol02i20tnhS0ge.5w.TaetTTnehhnreeeisppssrrdeooeeccseeRissgissvnwaewtraa.essdttTeeawhwsaeaOtutdeetirrsfcaddhliilsascrc0ghh0eaa1rriggAseepaaaennnrdmdd0icc0toot1emm,dbbriueinnnspeededdecrtppiArrvooleccaleebyss.assmwwaaasNsttPeeDwwaEattSeetrP//nneoormnn--it contact cooling water is designated as Outfal1001A and 00l, respectively. "WadaAvaiabia bv 3M for Insniaction and Ganvinn as Confidential Infarmatian Idad~ Availahl~ hv .RM for In~n~tinn ~nd t".c~nvinn as t".cmfid~ntinl Information" 11889988..00000044 AMANNARRLLS 33MMAA0000B8B8E8334455 : fryer Paget' 2_--il consisSaomFplihngowwilclboe cmosntwr qpuarteet. tSampllinSg woill eoe comnducts Oawtll001 Sampling will be conducted quarterly. Sampling will be conducted at Outfall 001 and will consist of 24-hour composites with duplicate analysis being conducted on the collected sample. SSuurrffaaccee WWaatteerrss~, SSeeddiimmeennttss,~ aanndd. FF,ii,,s.shh 33MM ccoonnttrraacctteedd ttwwoo pprreevviioouussssttuuddiieesswwhhiicchh cchhaarraacctteerriizzee tthhee ccoonncceennttrraattiioonnss oof FRO and ete i ows wien cen Fo Fo po Aa PFOA and other analytes in surface waters, sediment, and fish in the Tennessee River. As part ie rs em pF i est Ki, olloofcctaahtteiiosoennsseftthfhoaatrtatsar,reerueupppsrsettsrreeenaatmma,t,ivddeoowwsnansmsttprreleeaasmmo,,faasnnuddrfiiannctethhwee avvitieccriinnaiinttydy of the plant wastewater outa, sediment were obtained from of the plant wastewater ouffali. eis sh edo oo yf Ptyt OL Testing was also conducted on a number of !qsh and clams I'rom both upstream and downstream Ioan. The stywa cote 1 300 pm Ae location~. The first study was conducted in 2000 and has been submitted to the EPA (AR-226). Ts repo coi Saheb pon of oe oo he EPA (AR 220 This study report contains detailed descriptions of gampllng locations, sampling and analytical ies wel lea aa ty ST methodologaes as well as data tabulations and results summaries. The second study was iad cnt 5s ton wb wh 2 completed recently and this information will be submitted to AR-226 in the near future. J ---------- It is 3M's intention to conduct additional sampling to augment the previous tc, Thes sis wit combed mo vy hee hm rps studies. Thesestudies will be conducted once every other year with the next set of samples `bbeeirnggccoolllleecetteedd iiinx 22000044.. AAprporojejeccttppllaannffoorrffuuttuurreewwoorrkkwwililllbbeepprroeppaarer.deiindn tthhee 11s*t oorr 22nqouqauratreterrs T2000 Ae apoit woe ieee Pon Sov od of2004. As a part of this work, samples will be obtained upstream, downstream, and adjacent to Ne maebans ii 3M's manufacturing facilities. Water sane ib collected in dnd procs. Sediments spe il Water samples will be collected using standard protocols. Sediments samples will cll wih he of BONARbee on cet ses. no be collected with the use of a PONAR dredge using the established methodologies. A boat med Sm pe VA hen mortared Smith-Root type VI-A electro shocking device wil! be utilized for fish collection, Beateddmcrpion has sping rion od camping css ho on he Detailed descriptions of these sampling protocols and sampling locations will be contained in the eh work plan. MoniteringSchedule Monitorin~ Schedule Bek is checueaf he cment miro ps dhe 3M LOL Below is a schedule ofthe current monitoring plans under the 3M LOI. HoTT io si Aeti,A~. 2003 2004 2005 2~06 2007 ~008 Br [olT[ p a | 2007e | aos | Cottage Grove grotmcl water biatmual biannual biatmual biannual biannual es cove Seen {mobymen qa uty vr Cottage Grove effluent Dacor out wa mSu e man m aman Decatu.r. ~round water monthly, monthly quarterly quarterly qua!t_0rl~y biarmuaJ biannual biannual biannual biannual Decatur effluent quarterly quarterlyI quarterly quarterly qu.arterl5 Dest EE, a ne me] b~atur sU;fa_e.9 w~ter, sediment & fish once I once ' Reb set mn oyRugby Aug py Ang Ang i sgAl) R~po~t subm!.ssion .... by ~ug.1 by Aug.l~by Aug.1 by Augl by Au~.I ]by Aug.1 CR HAA ANT 11889988..00000055 sno -- 3MA00888346 Paced Mapes is sprit otk vit EEA ont LOU doe 3M appreciates this opportunity to work with the EPA on this LOI and on our prin arging ad oe FOR oe cL TARE, prior, ongoing and future EHS measures for PFOA. We look forward to dialogue with the EPA `rereggaarrddiinngg tthhee ccoonnttegnnttooftfhthiiss lleetttteerr.. IInn aaddddiittiioonn,, 33MM ppllaannss ttoo rreevviieewwttheeennvviiroonnmmeennttaall em me he wn rao Be avim monitoring data submitted under the LOI with EPA after two years to determine whether any `cchhaannggeess ttoo tthhiiss oovwerraallll mmoonnititoorriinngg pprrooggrraammwwoouullddbbee aapppprroopprriiaattee baseedd on tthhe ddaattaa.. WWee aannttiicciippaattee tthhaatt ttbhJiss rreevviieeww wwoouulldd iinncclluuddee ddiissccuussssiioonnooffmmeeddiiumm,, frreeqquueenncyooff ssaammppllinngg aanndd tteessttiinngg aanndd llooccaattiioonn ooffssaammplpilningg.. ls contcoos yon sy gsi Please contact one of us if'you have any questions. sient, Sincerely, VMiitkaalAS0erd,Dkisl Michael A. Santom, Director EA Specialty Materials EHS&K Top my 3M Company SDr.eugd.TiitSen Dr, G~orge H. Millet, Director =QEHS BEec,onScie Dyneon, a 3M Subsidiary 651-733-6374 651-733-5637 i_-- : Enclosure DCk592269.1 Rr 5 Cain Coo fmt Id~ct~ Av~ilnhl~ hv Rrd fnr In~n~tinn ~nct C'.c~nvinn n~ C'.nnficl~anfi~l Infnrm~finn" 11889988..00000066 Se -- 3MA00888347