Document Xz6jrXZqXrYegRL85Qrd6KmgR

USWAG UTILITY SOLID WASTE ACTIVITIES GROUP November 27, 2017 c/i: ! itiw Electric Institute DC 20004-2898 202- 508-5645 mmyswag.erg Via Email DDMWfE1a2naetaa0ovvpis0luiuihdrlCtPioiyniFoen.gddnGamtaetnoeov:esnniun2yd,eh3tl@rDavi1ala0CelPnpACi2raaoo.0gtu4Aeon6cvvs0teieonlnueA, gNe.nWcy. Mr. Fatouhi, romcrcPUEuerofanSioglmctrevWniaet.cimrirrat2AdTtoolia5Ii.hGtnrni7tieanem'gn,srmdgeSreirefmtneupowoqatbrrpaurdoceplilio,vietarniPmimecrnsgrltmigpaoeoDolrntenoyief)ntfsn.ictain.thctStsbgiiUaeopoettwSnehinhroceWaaiAinoqtlfthffAuigocmtoeiaGfahrnfluletellcthmsmyhyeegt,e'neesrbIrmvonUeucaiutoblrsmttneoaiael'dlsnrksispstwcmeyer,eoneeaceamSqktinnufeouibitdrnnclaiuirgdmldttsehoetrcmoWireeoogngtenniraihunntofseorlidttuaresreumnCtis--insAidoCadtgiwnrtcRnuiyptsoacai,rrvtlniloueunsiintrgrldi(eecgreimC'ngalessuCmganodGgrRencidrririn)ooanitogonurnlu,utrgnfpthiilahdnreetr(mehwgeU(--e4aCaS0tttCWiieisomCrRnAFiGnoRgf) wtwtcimmmhhoehooeeuprinnleclegdiiihvttrcrooboieaTpdreruqtiriheinnnoutonergdgvincir,iCgwseed(tg4Cdaeohoe0stRffetreoaCesfrnrousd.iusesrFcnalexah.aiemRsstt'iscsg.papsmoroghtlaneioeran2dtonnsta5guhuetm7aaneamos.ti9dnefnfJ4owdidtaar)nhts,anariiettetbonueospyngaarrphlrirOyiomnoaynsngusccoise1tnsrno(e5edeoiba,a.towfgenos2v.tredra,0heist1c1nrees.7o8gtrt,gari.Opmr1pt2reiorwBr0sceoou1tetnggiint7ccevorr.daaraaesuwDgmlmasraeae,econvptutuaeoidaetosnriflnlsunodptidehzapwrisaetoenesniasgrogmdstarneai/otaegroonmpinnrcrnhtisto,ffhadomindosecretfeeocaatrtCedennmeedcitCcsattitouicRpniorlolpaointunntrssionguooai,rnftcesha,s set1otvUaabtnlieusdgtaeiitncriaoelnv2eaw5vl7uial.la9lut3bia(enthigc)o(ont2hm)ie,npodldewateetntadeecrbbstyiy/ooOJnpacemntroauobtanoerirrytso1rh17ia5,nv,g2e2.0019B1708,e.dcthaayeussreufrloem2c5o7sna.9tme0mp(blpi)n(lalg)t(eaisvn)tdhreaaqnt autlhiyreessisstaatnotisortuwicnnaetlhr/eoperator Sierra Club v. EPA 18cv3472 NDCA Tier 2 ED 002061 00087244-00001 UPDa.aSgv.eidE2Fnovaftior4ounhmi ental Protection Agency otahpfepunrtiolmipnrieniadgtesolufyrefiaamccehpligemmropeuonnutdntwdhmeatereunrtlmse)'s,onirteitqiosurciinrreigtmipceahnlatstshegasotoiEnthPgaAftoprowrwoavnrieddr.es aconndfoirpmearatitoonrsocnan ttumeUtUtwihhvnmSSoeeoaaWWnelbtbusifilatApAmraeoaseUtGGriimictisnooSi''nssfgenfWigssociiutonnrouAicrnttntneceeGehqtderrtshapphsuestestarereirfreebeiudenrttkllauamaitl2sstettyl5iiaheercoo7mpn'oscnan.tr9noan,sge4folktrIlii(afaereonehmsttcu)hiasat(toneah2eenvnddts)eei;t,aswoiumCalamintnastnCeettdiwpdaernRnenrcrigtor(thar2mhmvfutte)hoeioldrodtreeenhsne'aegsioedaitaatuodsgoctbrrsirirhrdcmeaieoinelgnsotouigsogrfndwnmatgpeidpm.htmrewrsfeoonIosaogniagtrennntrrmecaatdsaserodmtpmorrtndmepwan.dictriitoouiitfiefoooncitacnrcniatnhtiit,onnriiaeontorggroiqwtnndpsauhgn,eroiesoetrofptelegrpautcr/mhrtoottaiiliegpsleimolntrentnuiai.irctmsnmasatgt,rlio:anatr(thgn1eied)sfor 1. A lternate Source Demonstration in Detection Monitoring dtrtridavpooneebeeracqsotmlr"deureuciieeacnleoitmatttreoineiisetdUooidsoemsanntntunrtfo(eaescdrSimnonttceeSriamteosoraIsgnstn)tnasreoiaao"afbt2fn)uobstul.5hlsironelsI7ieayvf2ndhr.s,ter95gwsmoa4a7t,mbhrat(.atag9eteehtikec)5rhnnee(orkS.e1tSgsuoqt)HamheI,rnwu.monoidiaowsfnuwdwlpneniaadelotirandsiyetv/fnotomeecoltg(rrepharriw,,ovnueeaanaesnfrgtsneeasle2ssd9trtparer5or,0l/fraes7yoroob-tsd.sdprigym9moiaerta4snaoayur,en(am,esnshstt)tatioott(ehmapwa2urmretps)reeidiceostfrraeeahrntuneltiaslidqleicoonmetciauaotwxhtnl9erirsrseei0,Ieen"qrIavttdadgIhhutalsahceeitulptyreuoaanreoorsatnnodsniwwtosgsieatttotfrnnhhriitandeetceeeumrr,ae//seColt2oooolenmw5Cyrppuct7.eentnreRsdi.crree9aniaaeuugtr5tgttir/unnoo.noi"trnirrigphfatgiie9eltcsor0haraSnentdSootatIrys eefaadssaouainpsne2trmscdpmdh5eccee7posedoonr.slsfon:n9dimsUtneds5i(fhsxtg1uu(enerb)lcnnadItl)ti9Vaotyte.ifi20kntromamc-gernndoounaaa2unnnokynu5nsiwetcnt7dpoaiona.dteerl9unnetierr5neercir(oa/rgnubondltr2)tppsar,2e5ie.retn5ra7oernn7na.gUt9as.tlr9o4oSyot2a4e(rwuWm5ew(r7eb)snc,A(il.o)ee9te2s;Guhrc4)aod/r,,t(mocsireetonpeh)mp(nn(et2ed2leoro)tee)rath9n.ipmtatef0soornI-taoredrdndnmntaamastosatyoaietutntokwrhhtsaanieaeetnmltnyriieawtonezrewnSni/erfotSomahrutpIr2alhidntenm5iee"ssrd7tr,a9ereg.dntit90rogrheia4nortgdte(eeueeat2cr9n)rys5ti(i20dese2on75-wds)ug.od79rif"aabi.c4sn9yt"uea(e4tsestartr(e)iiei(ogmfprs2)oocg(a)eur1cue,rnu)anarpairatldoetnlerbrrigtoinlfhoe"frgeodatmon, p2dUreomSgoWrnamAstGr{antio2o5tne7s,w9t5hh(eagnt)(ta3hn)i(siai)si)ss.eiEnssPcmAoenmntrtaakosfet sctoocrltreheaecrt9iivn0e-tdhmaeyepatsrimeuareemspbielsreitotrodigtfghoeerrmerudalekin,intthghaeatna--sasuletnselsrikmneaettnehtesmoauolrtnceiertonraitneg Sierra Club v. EPA 18cv3472 NDCA Tier 2 ED 002061 00087244-00002 UPDa.aSgv.eidE3Fnovaftior4ounhmi ental Protection Agency 25W7.e94w(oe)u(l2d)aisppcroercreiactte. your confirmation that our understanding of the timing in 2. Statistical Evaluation of Assessment Monitoring Data bateratmahhexnfenoaeettpaewsenllodroxayiewtancissoentaieTannrassmebih,endtilorrp[henag/oboloneruitatpp]cnahgmsreeigseoahnrtohmgoaaeapuartduntrpoanidetdslmrttaitthonithaom,roccgnfeoatcbahtduaulgilleemegnyrermrhodvsrteeiuahudossatllna.anouen"idtmssaaca8wtiltcroptl0yilaoaomloastitFmniwgenepserrgpl.sdteeolhm..eae9tfae,tndR0"oget)dte.nrwdha(ogiaeaentSi.uontymehnasrSasetipdtlScnatyhw42ooIgts0a1imairscsr4setCtoieme0.issmqc.r3FuFeaua.aplo.ndliRtnlrridtSeanee.deeetnrmgedexsta)hatef2la.thrymen5hloess7tapmsois.sttls,9ea2t3"atE,at5o9(intPu7sh0idts.nA)e9i(dtercd2i4tardcae)e(oya.lierrrssl)mett(Eihiwev2ninPvena)ogaAsle(uduulaaulewaimldastlteothhiphiocweoelentisntiinhano-ogegnf,r acceapastixotpposrm222aoscnppn555negeedees777dserfnntu...asrida999ddctammIaru555tiimndnixx(((e;enbbhcenang(aIIe)))sVtIt.,,nfsItooao2dthteTchfhrct5fesouteeoh7ccsahnnseoon.moo9etssmrdsaw5wrtrteteguaite(ipntinngrttrlcuslutieoee)etste(eirrumitt3vtnc//in2ihnoon)ecoat5t)edsppgsa.ln7mnweeli.weatlA9trrhyjeaovnaa5iuaegttradtt(semhoosialdnisruuitrrig)ptnhgnr(apanmms1oe,,trt9iis)siohhfuuao0,seiotohwsstncweidwwtteaaccifaaipnstreteaotyhdiaepthvvlrosis,meleiennedaennrrrovpvme,,ed9sf9aletqttt0iepte0llhahxruulrinadeeaemidgaIrbdanVtaargrioyiiadnuuyneonvsrcgllsrindadeeenoiono.ntgnofatdhdfaghfsndooeolwetyaeteeaibhoszstthlngtueyeewaenrnczeaiottdonoetnnhshiuatetsnitetenntrsehssgra/dpgspgeod.tsewaerhpetmgcconhIeetaiirnuereffretoaycayseennpurtttrdeeotaaeipnswpdarsmeddsrduantawpioeoo,lnndtetatneaeucsiidrxtincinetlfutfoiiidrIiotnncVroiefreidanonreatfrgelrolaralln. ciprneoraonsvdo2iudn5ceiU7tnd.St9ghf5Woei(nrdAs)dttG(hae1tet)bei.sceptltTriiieceohaavnimlsemsebtivtlomhean.aleiuttf,aoratraiimotnngae fimwonloilnuoilw2md5iun7bmg.e93cc, oo(ohmnw)s(pni2sle)et,retsiano/notndpwoewifrtathihttohtehrsEseaPh9mAa0vp'-sedliean9xyg0ptadliamnanydeastapitnoeoarniloyadsnids timingWfoerwasosuelsdsmapepnrtecmiaotnioitnoryionugriscocnofrirremcta.tion that this interpretation of the csmooeunarccsuuerrrdeeesn.mtlo8yn0wsFtirethadt.tiohRneegt9i.0m2-di1na3gy02itn,im2d1ee4tpe0ec6rtii(ooAdnpimrn. o1n72i,t5o270r.i19n56g)(--.a)tfhoertiinmiteiapteinrigodaninass2e5s7s.m9oe(ngt)(o3f)c(ioi)rrreucntisve Sierra Club v. EPA 18cv3472 NDCA Tier 2 ED 002061 00087244-00003 UPDa.agSv.eidE4Fnovaftior4ounhmi ental Protection Agency it it aiinmy.rqoueTweshetario@nnkusysrwoeugagain.rodraigdnvgoartnIhceeifsosEruxyeso. ur6raipsreodminptthaitstelnettitoenr, tpolethaisse mcoantttaecr.t Imfeyoaut have Sincerely, cc: BByarronnesBJroohwnnson (\ JUaSmWeAs GRoEexweecrutive Director Sierra Club v. EPA 18cv3472 NDCA Tier 2 ED 002061 00087244-00004 Groundwater Monitoring Flow Chart Initiate Detection Monitoring; begin evaluating groundwater monitoring data for SSI over background of appendix III constituents | 90 days Complete statistical evaluation to determine whether SSI over background Make alternate source demonstration 90 days / or \ 90 days 90 days *if demonstration is unsuccessful If SSI over background, establish assessment monitoring program; sample and analyze groundwater for appendix IV constituents 90 days Resample wells and analyze for all appendix III and appendix IV detected in step above; Establish groundwater protection standards I 90 days 1 Complete statistical evaluation to determine whether there is a statistically significant exceedance of groundwater protection standards for those appendix IV constituents detected 90 days 6 months If exceedance of groundwater protection standard detected, initiate assessment of corrective measures If unlined impoundment with exceedance of groundwater protection standard, cease receipt of CCR and initiate closure (unless unit qualifies for alternative closure provision under 257.103) Sierra Club v. EPA 18cv3472 NDCA Tier 2 ED 002061 00087244-00005 Timeline for Facilities That Elect to Make an Alternate Source Demonstration Under 257,94 (e)(2) Triggering Event Action Required due to Triggering Event Time Frame to Complete Action* Regulatory Citation Deadline for groundwater monitoring program Install groundwater monitoring system, develop program, initiate detection monitoring and begin evaluating for statistically significant increase (SSI) October 17, 2017 257.90(b) 257.94(b) over background. initiation of groundwater monitoring program Complete statistical evaluation to determine if there is 90 days ; 2 O V ' V w / ' i an SSi over background for Appendix III constituents. (January 15, 2018) SSI in detection monitoring Demonstrate SSI was result of error or other source ("alternate source demonstration"). 90 days (April 15, 2018) 257.94(e)(2) Failure to demonstrate SSI was result of error or other source under 257.94(e)(2) Establish assessment monitoring program; sample and analyze groundwater for appendix IV constituents. 90 days (July 14, 2018) 257.95(b) Results obtained from samples taken under 257.95(b) Resample all wells and conduct analyses for all Appendix III constituents and those Appendix IV constituents detected in the step above. 90 days (October 12, 2018) 257.95(d)(1) Results obtained from samples taken under 257.95(d)(1) Complete statistical evaluation to determine whether there is an exceedance of groundwater protection standards for appendix IV constituents detected. 90 days (January 10, 2019) Unspecified; assume 90 days Appendix IV constituent Initiate assessment of corrective measures or 257.95(g)(3) detected at statistically significant level above GPS in demonstrate that exceedance of GPS was error or caused by other source. 90 days (April 10, 2019) assessment monitoring For unlined CCR impoundments, Cease receipt of CCR and initiate closure of 257.95(g)(5); an Appendix IV constituent detected at statistically significant level above GPS in impoundment (unless the unit qualifies for the rule's alternative closure provision under 257.103). 6 months (July 10, 2019) 257.101(a)(1) assessment monitoring "Specific dates provided assume that there is an SSi over background in the first round of detection monitoring and an exceedance of a groundwater protection standard in the first round of assessment monitoring. Sierra Club v. EPA 18cv3472 NDCA Tier 2 ED 002061 00087244-00006 Timeline for Facilities That DO NOT Elect to Make an Alternate Source Demonstration Under 257.94(e)(2) Triggering Event Deadline for groundwater monitoring program Initiation of groundwater monitoring program Action Required due to Triggering Event Install groundwater monitoring system, develop program, initiate detection monitoring and begin evaluating for statistically significant increase (SSI) over background. Complete statistical evaluation to determine if there is SSI over background for Appendix III constituents. Time Frame to Complete Action* October 17, 2017 90 days (January 15, 2018) Regulatory Citation 257.90(b) 257.94(b) 257.93(h) " ' SSI in detection monitoring Establish assessment monitoring program; sample and analyze groundwater for appendix IV constituents. 90 days (April 15, 2018) 257.95(b) Results obtained from samples taken under 257.95(b) Resample all wells and conduct analyses for all Appendix III constituents and those Appendix IV constituents detected in the step above. 90 days (July 14, 2018) .''CViSicii,- i: Results obtained from samples taken under 257.95(d)(1) Complete statistical evaluation to determine if there is an exceedance of groundwater protection standards for appendix IV constituents detected. 90 days (October 12, 2018) Unspecified; assume 90 days Appendix IV constituent Initiate assessment of corrective measures or 257.95(g)(3) detected at statlsticaliy demonstrate that exceedance of GPS was error or 90 days significant level above GPS in caused by other source. (January 10, 2019) assessment monitoring For unlined CCR impoundments, Cease receipt of CCR and initiate closure of 257.95(g)(5); an Appendix IV constituent detected at statistically significant level above GPS in impoundment (unless unit qualifies for the rule's alternative closure provision under 257.103). 6 months (April 12, 2019) 257.101(a)(1) assessment monitoring ^Specific dates provided assume that there is an SSI over background in the first round of detection monitoring and an exceedance of a groundwater protection standard in the first round of assessment monitoring. Sierra Club v. EPA 18cv3472 NDCA Tier 2 ED 002061 00087244-00007