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INTERIN SITE FOR DISPOSAL OF 3M CHEMOLITE WASTES INTERIN SITE FOR DISPOSAL OF 3 CHEMOLITE WASTES I. EXISTING SITE I. EXISTING SITE J IT. SITE DEVELOPMENT & OPERATION II. SITE DEVELOPMENT & OPERATION IIT. MONITORING PROGRAM III. MONITORING PROGRAM IIVV.. CCOONNTTIINNGGEENNCCYY PPLLAANN V. ULTOMATE LAND USE V. ULTIMATE LAND USE 11118844..00000011 Ex1h1i8b4it | I. EEXXIISSTTIINNGG SITE SITE I. foot 30,000 cubic yards remains u J, TsThoheuetheewxxeiissstttieinrngng pllaoarnntddiffoiilnlllofssiittteeheiiss3 lloCococmaaptteaedndy iinnprotthpheeerty csiinononusC Cthtoow rttutteaacsggtteeeedrnG Groronpovvoeetr,h,tieoM Mnisniinndoneefseostotohfate.a.a 3MhiTTlhChleeomlalpanaandn nyddfifipsilrllol piiessrty caccooonbnntetsaartiimrnuneeedcddtevdbboyyluonmaaet22h5o5ef ffooasooibdtoteuteeaoarfr1tt4hha0,bbh 0e0eirr0lm ml.. and is a bermed volume of about 140,000 c TA iinhnbiosttuhhteeis3ss0oto,0huu0ett0hheeprrrcnnoupboqqicsuueaadryrtateeridrrnstoeofrrfeim mtthhaeesinitsllaeannu oTfhistheis 3MtheChepmroopliotseedwainstteesri.m site of the 3M Chemolite wastes. TmThaheteereeixxaiilssttiicnnoggnsii1is10t0,s,000m000ainccluuybbiiccofyybaaorrdidlssercc m d33rM 'aas'twseirnccigaooalal(l-3c-MfofiinrrDeseriddaswtsbibonoim gillaeeNirurnssml.y.beroTTfhChebHeEoMss~-iilt8etEze llCdaaHrnnaEdwNdf-ifin8ilgl8ll8-ss(3CiiMt-tee66D4ddr)raraw awwainirinegnggNen((u3c3mM1lboeD sDrerrdaCaw wHifEinnoMgrg-88~I reference. CHEM-888-C-664) reference. are enclosed for ~ II. SITE DEVELOPMENT AND OPERATION S II. SITE DEVELOPMENT AND OPERATION AAtshsessettaxattieesddtinppgrreevvsiiiotoeuu,ssllyyw,i, thtthoheuetu unanfdfidililllteeic(onal excavation tohrebeerxmistcionngstrsuicteti, onw,ithiosutapaprdodxiitimoanteallyex30c,a0v0a0tion occcauurpbbbaiiccecrimtyyyaarcrddaostsn..stthreTT uhchiptisisroenw sweo,onuutlilsdd appnarnprouopavvrlioiddxeegim eanaabbetoroeualuyttt io113n660,0mm r0oao0ntnetthhss ooycfafarpdw wasaca)sis,tttyeewbwaoaatitteleretrhrettrraepesahartetmms(eee6nnn,t4tt 00ssallnuucndduuggbaeeilc g((1y1ea44nr,,e4d4r0s0a)00t,ioccnuuibnbircicacitneerator yaa(ss1ahh,r0d0((s0i1),,/00c0b 0u00boiicccleuuyrbbaiirccadsshy y)aa.r(rd6ds,s4))0,,0 aanncddubiiircroonnyaoorxdxiisdd)ee, sludge incinerator sludge (I,000 cubic yards). TTihmhipissrovuuennduusseetddo ppcooorlrlttieiocontn ooafnfdtthhmeeonillataon nrddffitilhllel ww lieilallclhabbteee. TTcim hoheleplreocvmmteooidnoninttitooosrryicinsnotgglelmess,ycysstttleeaymnmsdiww miemiltlolelrnsicct,ooonrnsasitnihsdstet nooelefafarbcaayhllaeetaeac.chhaattee ppacnrroodolddleuulccecttatiiicooohnnnatesaaynndsdctoeolomblbes,sceetrlryivvoasantitm iioosennytseww treeselm,lllswsa.in. ldl TnTmhheeoeanrbillyytyossirim metethteeerrss mallenoeadnacichthleoaaarttecehthaaanentedd grsscooooiuillnlledwcm maotiotioeissnrtt.uursreyesTtw whehem hiillleew eaicttlhhhleaetmew woeenlcliloltsslolrew wcithitlleillon m sscyoyoslstnlteieem tcmotriiisosthneccosom umgrprpfoooasusceeneddd,wooafafteapar.ebbrefenoTntrhtaoeotnneiliedttaeecchoccalllaaltyeyectcaainnooddlnlesscpooitiiiplloen, ascannioddtlelemmcaaantnnihdohon olFleie.gs. uurrefFFaiicgg2euu,rrieesa a11psssehhmrooafw owlslrsaertttehhdeescaeeclnn oetltilierrdeceratiwlloaiannn ngddpffioiiplfllel , sttchhrieteoesspprraonospdpeoocF stseeiidgdonusriinenttlee2orrciiiamsmtedssaiittsaeem n..dalilFeFdireiggnuustrcireefailee33dddderieapnpw iicFcintitgssgurotthehfee 2tc2.h.roessTTchoheelselbbecceteitnnoittnooosnnniitoltofeec--satsohtoeeiidll mm maanijidxoxtrtuiuidrtreeyenw wotifiilflilltehdeffaacilcnieilaliiF ctthiagaatttueeere tFffhoioergrurctteeeosslttl4ie)incngwgtiiolaanlnnddopettfhrhemethietccoom lslllaeaemjccpottlriiio iontnyng m omofafannhtthhohoelelee cleo((aslsecleeheecatteed Fleigacuhraete4.) will permit sampling of the collected leachate. 11118844..00000022 2s 2 - mP Pirrxeetlliuim rmeii,nnaarrcyyollddeeecsstiigignnon ffopoirrpett,hhee ab bnedenntctooonlnilitetece-t-sisoooniillmanhole hmaisxtbuereen, ccoomlplelectteiod.n pipe, and collection manhole has been completed. TTlheheaechpparrteeelliimmcioinnlaalrreyyctiddoeenssiiggsnnystffeoomrr tithshee asiinntfteoerlrilimomwsll:aannddffiillll leachate collection system is as follows: 1. GG arrraeaaddee toaanndda cccooom mnpcpaaacvctet bottom of the bcroottsosm-seocftithone disposal ddrisapinoisnagl sttaohoreoawtthnheetoonlleaeatachccohohanatdcteearvaweccioonlclgllrseo e.ccsttsii-oosnencm mtiaoannnhhooldleeraiaanssing shown on the drawings. 2. CC loeonanscsthtrarutucectt marreneihinonflfoeorrccceeoddmplcceootnneccrrewetiteteh ((AlASaSTdTMdHerCC447788)) rrrlueueannicggnshsfoart((eN cNeeedm eennacaanhhohnocRRlr-e-e11t99ce88o11m--tTpTolpeootewrritw eehqqiutuha2al7l)")laddaadinnaddemreter Jraaeocciiccnneeftssosssrcsooehppdaeelnnlicinnogghnacvaaressetesrs,huhobotwobwpennr w oonnciothtmthhpeer2e7dsd" rsraai~w woiinainm ngtgesyst.p.eer JBggoaaassisenkketesstthas((lhccloaonnlblffeoohrrm pamvriieenn-ggcrauttsobotbAeAcSrSToTMnMccorm CCe44pt44re3e3)s).(.siCdrnettezxpe oBorraseeeqqusuahalal))l..l be pre-cast concrete (Cretex 3. PPtlhlaaecceedrasswooiiinll-g-bsbeennatntoodnnicitoteempammciitxxttuturoree 85aasstosshhoo8ww8nn% ooonfn M MTthhoeoeddificdfioriaeemw ddpaincPPtgrreosodcctatoonsrderaldcdoeenm tnshspiiiattccyykt netos((AsASS8T5TsMMhatolD DlI1S8558b5%7e7)).o.fof ur TPiinLnhcSceh-he5ces0os.m . ipnaTTchthteheedeppesmereirccxateelunnrttthaeaggiceeskhnaoolfeflssVVoboelslchcldlaaaelyytlerbB Bmeeeinnntfteooodnunirittee bbPsyyLeeSpll-a5aab0gbeoorirnaartatootthrreyye ofm tteeiss1xtttiiuxnnrgeg10-tsto7oharcrlmeel.ssubulepltet rdeiinnsteercaamomnmindaaexxdiimmuumm osccfeooerrphrreaeeagccdett.eeddratSffeoooirrloeefvvcao1apnpotxorarai1atn0tiii-oo7nnng,,cmcluu. annypddeeersrrha44sle88lcoiinnbncdechheess ooobfbttaahiiennaeeddd. from the Chemolite site, if Soil co~taining clay shall be from the Chemolite site, if ppoossssiibbllee.. 4. CsChooonnwssnttrruuocnctt tshseuubbdddrrraaawiiinnngw ws.iitthh gPgreraranfnuoulrlaaartremm daatpetierprieiaall aass = dshioawmneteorn sthhealldrabw e insigxs. inPcheersfoarandtedcopnfipoerm to AAmdSaSiTaTtMm MereCiCta5e5l00r88sshohoarralllAAlAASbbSHeHeTTOOwsaixMM s3h36e6indcTThypyepepesae 1raI1noI1dcI.k. co(GG n3rf/roa8arn"nmuullataorr m ssiizazeete))riaaannlddshccooaaalrlrsseebe ccwoonnacscrhreeetdtee psseaaannddr.o. ck (3/8" 11118844..00000033 FIGURE 1 CHE[~OLITE EXISTING LANDFILL SITE Bott Ir || | .A .. AR, SR CNEE - 1| SA WHa e fi CONE , JS: | - ~ Lm Hb / VION ORE Se A L a4 CCA 8 VR RE ER settdE E Soh iE Gy EY ` aLAb)E bia R RE OLTN T . oS gLNR MR E E ne ote " pr fo fini ii i A7 RE i aTLows i hd 1118844..00000044 me yep Eyph - ww CU ws 0 LYSIMETER #2 ;~ 7 IINNEERRTT LLAANNDDFFIILLLL SoaLE: 1% = 50 SCALE" i'" = 50' ERED C SL, lt * A amy an 7 ~~ En Ss wr I| ye bs oY 4 2 . pos ih 17 SI [OY J hi AN )x og?Sy NY <3 / J Y NN "oY & we rd AR & | NV /RY 5 oR~ =i Tv C; re VJ4 f CoA \ =5 Saat an ge pr TU | \ | ' {0 Li Ls;YiSImMEeTTE=Re#:rI1#I , row: FIGURE 2 comotrs srs CHEMOLITE INTERIM sm 118 LANDFILL SITE 11118844..00000055 ---- TT a Ds LANDFILL rn _ Dos : ht T 0 7 v 'BBEENNTTOONNIITTEE -- SSOOIILL MMIIXXTTUURREE. 2000TM z+oo om SSEECCTTIIOONN C-C *. ST TTT TT TTe oee PROPOSEO LANDFILL cis ~ pc r--o5 0 - BENTONI'TE- SOIL MIXTURE Secrion 8-8 2v00 SECTION B - B buin2s% orenronaTeo Pie GRANULAR MATERIAL 0 PIPE ~ section A - SECT ION .& - A FrouRs 3 FIGURE 3 cross-szcTIONS oF CROSS-SECTIONS OF CHENOLITE INTERIM LANDPILL CHEMOLITE INTERI[~ LANDFILL 11118844..00000066 oe VVIe ! 1bp I10 [Tr= | wooo cover WOOD COVER -- 1I o TM ' | uw Tose extenoeo as 147 Reauimeo MH TO BE REQUIRED To star ABove EXTENDED AS TO STAY ABOVE 7 ENFILL f) cwouusepenes [+ F~UBBER COmPRESSiON GASKETS ; -- ro -- --+ _ mu 7 7 A 7 C7 E WASmHERD CONCRETE Sai & pearonaren iE TS precast sase LLEEAACCHHAATTEE CCOOLLLLEECCTTIIOONN MMAANNHHOOLLEE - DDEETTAAIILL FIGURE 4 FIGURE 4 DETAIL OF LEACHATE DETAIL OF LEACHATE coLLECTION uaNiOLE COLLECTION MANHOLE 11118844..00000077 Sa. 3 - OO spupecerhraatatiioomnnannoofefr tthhaese ltlaoanndkdfefieilplll tw hweiilllllabbneedfiddloolnneemaiintnerial zsiinunacthiaannonaaam ollkfkaaanltlniihenenreemaescctooantnolddisitktiiecooeonnpn,,tathippenrreeedvvlaeenn innttdiinfntigghlel sswom oallasuutbtbeeiriwliliaai-t-ler zscalslauhutdidogganeend oaantnfhddethb bewooaiislm lteeeerrtwaaaalntsndedrcioinsnnlcctuaiindinngeeeerrdaatwtooiinrlrl tahshe. be ash. waBsotielwearter mixBeodiler atsohgetanhderthaet w thaesteew ndatoefr eslaucdhgeworwkiilnlgbedaymioxnedthe wteeoixxgliilsestttihibnneeggr pussasuuthrrfefthaadcceeet..oendaT Tnhdohifisosveeaaacrllhkktaaw hllieionnreewkoinrm mgkiiixxntdtguuaryreefoancethien w tcthhuieerlrlennnbooterrtthphweouearsashksteitdnpgpataorfrtat caenoofdfwiotthlhvleeerbiinetnhtteeeprruiw ismmhoerdsskiiinttseego..utfhaecTTaehhseetin u aucnnundtrtirieltlnhettthnhew ewooaarrrrkekeinaeagdiissffar~offeimilllw tlehed iedll ttnooboerttthhhpeeeuassheetexxdiissttostioinntugghthebbeeearrsmmt Southwest portion of and then worked from southwest portion of the the the interim site. northeast to interim site. the TTShhoeeuthiiwnneccsiitnneeprraaartttoorrofaasshhthewwiillillntbbeeerimppllasaiccteeedd. ii~n]Tt~htheheeash wwsaiioplluplltrhowxooeinnsllmtyyatepfflaiiyrlltll 1oaa,f30ss0mmtaahellcllubiippncootrrettryiiaioormnndss,oiotffeb.ettfhhoaattrTeheaartreehaaaes,,h accupurrprrreeonnxttimabbteeerrlmmyeedd 1,vv3oo0ll0uummeecubiiisscccooymmapprlldeestt,eellbyyefffoiirllelleeddt..he A Adiffsttpeeorrsatthlhee siiintnetteerriiismmnsostiitteeavaiissilaffbiilllleleeddtheaannddexiiiffstiaangffiinnaall ssdciaiitstpepeacoiccstaaaynnl bbtseehiteeeexxeppxisaiannsdtdneieodndt.g. abveTTarooimlappbrwrooolevuvilidddtheeebeaaeddrdxdiaiitistiistoioennndgaalfl ive dcffeeeaveeptetalcoaaipnntyeddd.ttthhheeeTheeeexxxiiisbsstettiirinnmngggwoblluaearlnnmdddffw ibiellollucldossniitbtseeetrurffacuutirrsettehdhdeerrfrfiovme m medadeatgvteeeerlroioiapfaleldt.tthaeakkeeTlnnahnedffrfbroieomlrmml.tthw heeoAuh hldifilillbvlee oonncfooottnhthseetrlueeifcaatstsettdewerornunfrlodm eaddgde aobofutthe35,la00n0dfciulbl.ic Ayarfdivse orfooant otlhifetr 18would m madoodnntthhasbs occuaat ppa3ac5ci,i0tty0y0 ttoocuttbhhieec yllaaannrdddfsfiilolllr.. another 18 IIIITI.. MONITORING PROGRAM MONITORING PROGRAM SSliyitsteeimem mtooenrnisitt,oorritinwngog ww wieilllllls,bbee appnrdroovvtihidedeeddlebbayychatththerreeeecollection slyysstim eme.terTsh, etwweollwselalrse, eaxnidsttihneg;leaocnheabteeincgollection PPWsyerrlosotlddeuumc#ct8.t.iioonnTLhWeoWgeeslwlllefl##ols44r taaahnnreedd ettthwhxeoeiswotoiettnlhhglee;srr OO oabnrbseeseebrarvtevatianattgciiohoennd. wBW Biooelttllhhl bt#theh8ee. inllyLsystsoiaigm lmsleeetftodeerrrssbythaaeOnncddttwolleboeaeacrw chhea1alttleesasscacuoroemllilleneagccttttaiitocohhnneedssy.ysstteemm w Orreneiqeqluul ilirrbyeeesddimineaatpspeptprarrololvwveaiadlllsls bybaaerreeOlcoootbocbtabtaateiiernndee1ddneabasbsyyrumOSSbeeinsppgetterem vmthabbeteeirron1I.. OWenlel ly#s8imanedtewrouwlidllsberevelocasatetdhe nceoanrtrOobl.servTahteion W ooasttehhleeplror#s8sttwiwoboalnedllyyw stsioiommuetledhtteeersresserxvww ieisiltllilansbbgeethterlloeonccccaaohttneetddarondaal.ss sclclTaloonhssteeeed mttaooosvipiinnnogttseesrrficbcreeoleppmtt ttohttheheethlemmaanaxdexfiixmimiulusmlmtinaaagm mreooautur.nnettncoohff ssanoodiill smlmaonoiistsettduurree moving from the landfill area. 11118844..00000088 4 - The lysimeter locations are shown on site ppllaann ((33MM DDrraawwiinngg NNuummbber CH~EM-888-C-O001) and pe I a Lysimeters #I and #2 are also shown in Hlmareiole, Xi 37a 12areisoshow 12 iy Figures 1 and 2. Lysimeters ~i and #2 will BA Tiated below the borten 1100.2 ith be situated below the bottom elevation of the Hropiaaies belowthe botyon, sleyatio proposed interim site and will be at Bona 55 Tost ana Hes" ELL,PSR cevony elevations 745 feet and 755 feet respectively. Erheer eas ho era sok, SERS en) Lysimeter #3 will be located near Observation Well LFAIGoAsS,ERLosated nearoneery #8 at an elevation of 740 feet. All the elevations are conditional upon the depth to bedrock. Lysimeter #I is located downstream consistent Tom pageant, dons etnsone with local topography and the underlying mone iaegrashy wad the underiying bedrock. Lysimeter #2 is .located between ri rer ERT Production Well #4 and the landfill s.i~e CorsiSiavh WI maagins mdtitlaite consistent with subsurface groundwate~ flow. Prouerion werk #4. vod Orgnivgrieg Fh 78 wee Production Well #4 and Obsegvation Well #8 are EL shown on the site plan, CHEM-888-C-O01, and are located downstream and upstream respectively oe protmaatoy chnytod, Wrenn respect on the groundwater gradient. Figure 5 is a Tole Eromieterpti Hue$32 geologic cross section of the two wells, the Roi rain ad He landfill, and the adjoining area. Production Rell #4 53 currently ested fox Production Well #4 is currently tested for Ten JOR 48 SIA Joe tor water quality on a bimonthly basis. ObserTao He FInd Shamed Simeon routa vation Well #8 and the control lysimeter would be sampled quarterly and tested for pH, orfamwied quarterly ad testedfor Be, Lona solids, sulfates, and scanned for total metals. The other two lysimeters and the collection Toporior org dpsimeiens wd, she enfisstion manhole would be sampled at least 12 times per To eae amped 2 Later 18th year, coordinated with precipitation events. 123% omordinated Wich precigitation events Each sample would be analyzed for pH, total Sah anmris world be angled fo BRL ra solids, and sulfates. Every third sample would polite, madouifaes. Sven hindsiapie v be scanned for heavy metals and also tested Be Spamned son ee ov A for Arsenic and Mercury. wv. some ny IV. CONTINGENCY PLAN Ges A. Leachate Criteria The determination will be sade by the The determination will be made by the Eo Sarto heel, Tie Minnesota Pollution Control Agency as aie to whether the potential existed for a ee te Ee significant pollution problem. Leachate Sir Ps Tien Tepes data from the lysimeters, groundwater r Torys fate, fIrrmiatrhteee;llagr0o8un,iaTgie s quality data from the wells, and the leachate criteria from the MPCA hazardous waste regulations would provide the basis for any such determination. 11118844..00000099 gys E3-E FREEEi EE EYE Sap 2B #| E | i hig ef23 1I E 84l R ! eR 2hHh Re iE Et EEL gg 88g bow CE Hy ghEEEE If: PiONilN Ti ERdNGd bE E x 2ihCeiRpHdha i Hla [!| 3a25 H aE dN Hl Epa HHi ult hi 5 ER AR d o:b E25B 5zE5i EH E PLE dn e PEE os BEi 22S85u22z52y,k PiUp I hs H Eg E 1, TU el EG Rese E EeR La R HEE RM Vi ---- L, pid i Ey jagadil Fi A An i LHen ltihie hpiHH E H (8338 SSE I Te nelNHh hI BenE na s if Hain oa go lT e E g{lTEELE E EeCe HE nHin 11118844..00001100 33MMAAO0404S566668844 os 5 - B. Acceptable Leachate B. Acceptable Leachat e OwOoppueelrrdaattiicooonnntioofnfuetthheeunteeixxliisstttiihnengg fiiinnnattelerridimimspssoiistteael w qaaulloattuenelrtdrnintaacittoieinvsvteeinruwweeaqasusiuroonepptdeie,rlraatttthihiooeennabfaleil.nr. maslAAwsdsoiusw wplaadsoststeebael roqrapaueiiasrsenaedttdiitoiffeniivsveecorenffqteeiueenttiu#eeaaddnn.dd, ttthhNheeoe ballaedardnnmiddtsffiiiowllnlloiainulnlgdg be m nwooopounenlirditatootirbroieinnnggicnosoortrnatlillneleueaadecc.dhha.atteeNccooolallldeedccitttiiiooonnn addleevviicceess would be installed. C. Unacceptable Leachate C. Unacceptable Leachate tSSahhbooluuell,dd ttthhheeen lleetahacechhaeatxteeistqqiuunaalgliittlyyanbbdeefiluulnnaacaccrceeepap-ww tIaofobuulnlleddo', bboetethheellnerevveatehlllellteeeddrenxaaaitnnsiddtivnetthgsheewleassruunerrdfffaaaiccvle~alii(lsaseareebaalalleeedd.. tttIohofe nddboiisesprpoomotshsseeewroooufaflldtttehhrebeneaCChtrhieavemim eossleoidlitwteeaenrww eaaasdastdvteeiatim milaaoatbneatleerlriiaall,, taffhilivesveoebebffreeomoetsst,,eawlbboeuuudttl.dtthbheeeA riilnanewiwasacaerhrdddatessalnloocppoaeeldssldeiw wctotioouiunloldndal sslayyelsssaottceehmmabteew wosowueuolalduldel.dbdbee. beiinAnessitlteataahlllcelerheddacteoaannndvdceoyttlhehleedectcctioooollnltlehecectteedd eoelerxxaiicssshettipianantgergatww weaoasustttledrewewaabattetemereernitttthrreeeoaqartutmimcpeeomnnnetvtnetyffeaadwccoiiultloliittdyythbee aoiinlnr sssotstaaellpblleaeerddai..ntestA Atardleddladiettidm tiiooetnonnatalml eoqrllyueysispiiam mmdeeeetqnteuet rarssw teolw wuyoloduullddbe maolsnoitobre tinhestallalregdertolam ndofrielladaerqeuaa.tely monitor the larger landfill area. TTihdheeenotoninltlyyiedootthhaeerrer ahaalltzteaerrrndnoaauttisivveewssastcceuurrrlreeannntdtllfyyills piiindneremWW niittsiisscfciooencndsosiuinlna,d,rebTIoehowwaaoza,ba, trdaaaoinnuddnesdIIw llllaaiinnsndtoeeiinssol..aontdhIIfeffirlls pbaaelelttrem herarniuntalsaettidicvvoeetussoldoaanrbreeee ooffofobuutnnatddihneestthdeheesaminmadtaetsetnerorifiaooalrlthw weorouulldd bddlieeissapphcohoasausatalleel.d. wotouSSlaadommnppbelleiinnoggcfontaahnnteddisneuttreredesaaitttum enmsteeinnlttfoootrfhfe tthhee m dmleiaaastctpeeorhrsiaiaaatllel would be continued until the wsaitse.moved to an acceptable was moved to an acceptable disposal site. V. ULTIMATE LAND USE V. ULTIMATE LAND USE OOannncdcee rttehhaeedy ffiifnnoarallusddeii,ssppootshsaeall,inaatlltetererrinnmaattsiiivvteee wiisosulssdeelleebcectteedd cacTntoodvvweeorrreeueadldddyw wibitetfhhorslaatout pseelled,eaastsahttte ttawwinoomtienffreioiomemtutmosofoiffteccoo2w mm %popatuacolcdtteepddrboemeeoaatrretth h.. sSsIuuutrrrffw raaooccuueenlddw iwnabatgeteersrtleorddprrreaaaidiinnn.aaaggteeTaoaanm nmddiniinssmhihumaampipzeededof tteoor2o~scciotooonnnff,oporrrm omgm rattooostse w wpsuoeourrurlmloddiutnbbceededinssgeeteoeddteeegdrdrorwaaa.innndd. FnniaagtTtuuuorrraem alli5nvvim eiesggiezeetataaptetiliroaoonnnsiow wvnoioeu,uwllddgrbabeess permitted to grow. Figure 5 is a plan view diinstpelraiyninsgitethe contours proposed for closing displaying the contours proposed for closing the the interim site. 11118844..00001111 en6 - If the leachate is not determined to be a potential pollution problem and if it is agreeable to Cottage Grove then the monitoring of the site would continue on an annual basis or a minimum o5 ~ve years until both 3M and the MPCA were confident that no problem existed with the landfilled material. If the landfilled material is removed, the area would be restored to conform to the surrounding terrain. Grass would be seeded and natural vegetation would be permitted to grow. . 11118844..00001122 Bar min Te me Beannooo TERE TT id B - eeni e LU eal Ther BRAE NE TTT YS om | S Lsmeren ez hid hp "Sih een It Tey bee .i fly i - ! ---- LANDFILL meee oo /: or NS:/7 " PVEaTndA] ar yan Fs WSg 7 i 7 XN : Xiredghy) di l koh boil 4 bo Cn Toh ee iE ey Po i . Fol HEE 4 Wr TL Vase . Calaem Co Fo " yd = NS -- TT Z ] : oT : FEE : Bens o oe d . hd rR J \ . \brome o FIGURE 6 "PPRROOPPOOSSEEDDFFIINNIISSHHEEDDGGRRAAD~EESS 11118844..00001133 BE fard SE swacousess? 3MA00456687