,..$,tao84.c^g-Al-buNrrEDsrATESENv¡RoNMENTALpRorEcrtoNAcENcYis\7rÉnEcroNrtt7r$l@¡*1650Archstreet'¿àr¿*"ÉdPhlladelph¡4,Pennsylvania19103-2029Mr.AliMirzakhalili,DirectorDivisionofAirQualþ3"iîlïiJ#åtr;å::lÏ*'Rcsources'cr¿?¿01¿655S.BayRoad,Suite5NDover,Delawa¡e19901DearMr.Mirzakhalili:ThankyouforgivingtheU.S.EnvironmentalProtectionAgency(EPA)theopportunitytoreviewtheproposed"DelawareRedesignationRequestandMaintenancePlanUnderthe1997A¡nualPlvfz.sNationaiAmbientAirQualitystândard;stateImplementationPlan;FortheNewcastlecountyPortionofthePhiladeþia-wilmington,PA-NJ-DENonatlainmentA¡eaforFinePaficles"and.,DelawareRedesignationRequestandMaintonanccPlanUnderthe2006DailyPÀ¡tz.sNationalAmbientAirQualityStandardStatelmplementåtionPlanFortheNewCastlcCountyPortionofthePhiladelphia-Wilmington,PA-NJ-D.ENonatt¿inmentArcafqrFineParticies."EPAhasreviewedthe1woproposedredesignationrequestsandmaintenanceplansOurcommentsareenclosed.Pleaseente¡thesecommentsintothepublicrecord.Welookforwardtoworkingwithyoutoresolvethesecomments.ShouldyouhaveanyquestionsportainingtoEPA'steviewofDelaware'sproposedredesignationrequestsandmaintenanceplans,pleasedonothesitatetocontactme.Ifmembersofyourstaffhavequestions,theymaydirectthemtoMs.MariaA.Pinoat(215)814-2181.;;i;*&Dia¡aEsher,DirectorAirProtectionDivisionEnclosurestiPrtntedon100%reclcled/recyclùblepapefvlrh10096posl-consamerfiberandprocesschlonelreeCustomerSemlcelIollìne:1-800-138-2474EPA'scommcntsonl)clawarc'soctober23r2012proposcd"DelawarcRcdc'signationRcqucstandMaintenanccPlanunderthc1997AnnualPMzsNationalAmbientAirQuilityStanaard;StateImplementationPlan;FortheNewCastleCountyPortionoffhefiiUacpnia-Wilmington,pA-NJ-DENonattainmcntArcafortr'ineParticles"(theproposedplan).1)Propo.sedPlan:5SIPComploteness-FullyApprovcdSIP.Section110andPa¡tDRequirsmeplsi,5,2DelawareÂoproaeh"D"1"**"*b-i1editñnualptr¿r5attainmentdemonstrationtoEPAonApril5,2008.ItwassubsequentlyrevisedøupdateonroadmobileemissionsbasedontheMovEsmodel,ands;bmitiedtoSpAonÀAay3,2012.EPAhasnotcompletedrulemakingonthe2008SIPorttreMay3,2012Revisiontothe2008PMzsSIP'However'EPARgeio-n3hastecentlyinforrnedDAQthattheyhaveaConsentDecreewhichrequiresfinalaotiononDelaware'sattainmentplaninDeæmbet2012."C,ommgnt:TheconsentdecreehasbeenmodifiedandthodatebywhichEPAisrequiredtoö-plõluf"-uti"gonDelaware'sattairrmentdemonst¡ationftrtle1997annualPMzssønåardhasbeenrJvisedtoMa¡ch29,2013.However,EPAisworkingexpeditiouslyonthisrulemaking,andanticipatestÏatitwillbecompetebeforeMa¡ch2013'2lProposedPlan:8.2.3ContiolMeåsu¡:esfor'Maintenâncé:ofG.óodAlrQualitvliniddlg-pfoase47\-"Iubl"8-7showsthereductionduetocontrolsandthecontrolmeasurebysourcesector."Conment:Pleasereplace"Table8-7"with*Table8-6"3)ProuosedFlaru8.2,3ConhotMeasuresforMaintenancçofGoodAirOqglltv"T"bl"8óP"tiZoOZEmissionneductionsduetoControlMe¿swes"comment:Pleasegivethetimeperiodduringwhichthesçreductionsa¡eachieved'i.s.'2007until2025.4)lropo¡edPlan:10Continsencl¿Moêsurosì¡0;2DelawareAPoroach:1'WarningL&velResDonse---u-A*uminglevelresponseshallbepromptedwhenevertheannualPM2.5concentationof15.Ipgl#o,gt*i",o""urcinasinglecalendaryearwithinthePhiladelphiamaintenancearea.comment:Pleasespecifithatthewaminglevelresponsewillbetiggeredwheneveranarmual^"!LPWtconcenlationof15.1¡rglm3orgreateroccursinasinglecalendaryoa,rg!s!!ymonllorinzsítewithinPhiladelphiamaintsnanoearea.5)P¡oposedFlan:l0.eontiir$encyMeaqures:I0.2DelawareAorroach:2.ActtonLevelResnonse"Anactionlevelresponseshallbcpromptedwheneveratwo.yearBvêiageofthsa¡.nualPM25conccntrationisl5.l¡rglmrorgrcalcroccu¡swilhinthePhiladelphiamaintenancca¡ea.Aviolationofthestarìdard(three-yearaverageofI5.1¡_rglmrorgrcater)shallalsopromptánactionlevelresponse."Comment:Pleasespccifythata¡aclionlcvclrcsponsewillbctriggeredwheneveratwo-yearaveragcoftlearnualnuanPMt.sconcentrationofI5.1pglln3orgreâleroccursinasingiecalendaryearalanvmonílorìnesílewithinPhiladelphiamaintenzurcea¡ea.6)P.roposedPlan;l0Conti¡qsnclr'Measurss:10.2DolawareAoproach:3.Studyanddataanalysis"Basedontheresultsoftheanalysis,contingencymeasureswillbeselectedfromthoselistedbelow,orfromanyothermeasuredeemedappropriateandcffcctiveatthetimetheselectionismade.However,ifanewmeasureorconlrolisalreadypromulgatedandscheduledtobeimplementedatthefederalorstatelevelatsuchtimeaftertheexceedance,andthatmeasu¡eorconholisdeterminedtobesufficienttoaddresstheupwardtrendinairqualíty,additionallocalmeasuresmaybeunÌiecessary.Theselectionbetweenmeasutcswillbebaseduponcost-effectiveness,emissionsreductionpotential,easeandtimingofimplementation,andotherappropriatefactors."Comment:PleaseensuretlratDelawa¡esharestheresultsofitsstudywithEpA,especiallyifDelawa¡edeterminesthatnocontingencymeasureswillbetriggered.EPAsuggestsinsertingthefollowinglanguagc.únehwûryH,tllsubrnl!la.PPA,ønarrûlttîìito¡letnansqøteleir.Op4set!tfl1arsuftstìeadeauateloreturnihøøreøloøltaínmcnt,,,7)Propose.dPlan:l0Co¡tl4gcnc).Meæures:10.2Dçlawa¡cAporoach:3.Studvahddaraanalysis:TabieI0-lScheduleforPennitRcvisionsorRuleReviiionsforContlneencvMeasu¡es:footnote2l."Thisscheduleinitiateswithcertificationofambientairqualitymonitoringdataindicatingaviolationofthe1997annualPMz5NAAeS."Comment:A¡actionlevelresponseistriggeredbyaviolationaswellaswhenatwo-yearaverageoftheamualPM2.5concentrationis15.1pglmrorgreater.Foôhote2lshouldberevisedtorcflecttbat.EPA'scommenfsonDelawarc'soctobcr23,2012proposed"Dclaw¡rqRedcsignation.RcqucstandMaintcnanccPlanunderthe2006DailyPM2.5NationalAmbicntAirQualityStaidardSt¡feImplementationPIanForthcNcwCastleCountyPortlonofthePhiladetphia-Wilmìngton,PÄ-NJ-DENonattsinment,{reaforFineParficles"'(thcproposedplan).l)PropÕsËdPlarì:2.2Philadelphia-Wi'lminglon.PA-NJ-DENÔnálraií-nei44lgqÐçÞ!gqe!4'n."EPAitrf""".,IDelawa¡eDivisionofAirQuaiity(DAQ)stafr,thattheyexpectthecDI)RulemakingtobeproposedintheFedoralRegist'erbyDecember14,2012;'Comment:EPAproposedthedeterminationofattainmentor"cleandatadetermination".(CDD)f*rft"ZOOO*IlìuulÞtt¡r,sta¡dardfo¡thePhiladelphia-Wihnington,PA-NJ-DEnonatlainmentareaonOctober2,2012(77FR60089).2)Proposed!lan:4.2.1Eoonomic"Conditions"Th"GDPinevetyy"*bet*een2008ærd20llisgleaterth4nevoryyearbefween2006¿¡d2008."Çommpnt:Grossdomesticproduct(GPD)ineveryyearbetweøn2009and2011isgreaterthaneveryyearbetween2006and2008."3)Proposed.Plan:5.,3Pa¡tDPlanReouirements,forNgnattaùmeÂti,reasinGeno¡alÎI"*e"-,thebaseyearinventoryrequirementunder172(oX3)isnotsuspended'Delarva¡ewillr.nçetihisrequirementwhenEPáfir1lyapprovosthe2007baseyear---.inventorysubmittedwiltfhisdailyPMzsNAAQSredesignation'agdmaintenanceSIP."Comment:TheinventoryrequiredunderClea¡rAirActsection172(a)(3)muslbe.a.*.p.eñõrirn",accurate,andcurrentinvontory.Delawareshouldbc¿w¿rethatithasthooptiônofsubrnittingits2008inventorytomeetthçrequire¡ientsofseôtions172(c)(3)^"ReductionsareshowninTable8-7."CommenlPleasereplace"Table8-7"with"Table8-6"l)P¡oposedPlan:8,2.3ConlrolMeasu¡esforMaintena¡rceofGoodAirOuglitv"Table8-6Post-2008EmissionReductionsduetoControlMeasures"comment:Pleasegivethetimeperiodduringwhichthesereduotionsa¡eachievod,i.e.,2008until2025.6)Propq$edPl¡¡:I0ContinqencyMeasures:10.2DelawareApproach:1.WamineLevelResoonse"a,Awaminglevelresponseshallbcpromptedwheneverthe98thpercentile24-hourPM2,5concenttationof35.5¡rglm3orgreateroccursinasinglecalendaryearwithinthePhiladelphiamaintenancearea-"Comment:Pleasespecifythatawarninglevelresponseshallbepromptedwheneverthe98thperccntile24-hourPM2.5concentrationof35.5pg/m3orgreateroccursinasinglecalendaryearocaurs.alanvmonìtor¡ttpsìtewifhinthePhiladelphiamaintenzrrccarea,7)Pr9pose4PIan:l0ContingoncvMea.sures:10.2Delewaró,¿loproachlI.WarnineLevelResoonse:2.ActionlævelResponse"Anactionlcvcllesponseshallbepromptedwltenev^eratwo-yearaverageofthe98thpercentile24-hourPM2.5concentrâtionof35.5pg/m'orgreateroccurswithinthePhiladelphiamaintenancearea."Comment:PleasespeciSthatanactionlevelresponsewillbetriggered-wheneveratwo-yearaverageofthe98thpercentile24-hourPM2.sconcentrationof35.5¡rg/mrorgrcateroccursalanvmonilorings¡&withinthePhiladelphiamaintenancearea.8)PronosedPlanll0ContinqenoyMoâsurçs:|0.2DelewaÍtApnroaoh:3.Studvanddataanalvsis"Basedonthe¡esultsoftheanalysis,contingencymeasu¡eswillbeselectedfromthose.listedbelow,orfromanyothermeasuredeemedappropriateandeffectiveatthetimethcseleotionismade.However,ifanewmeasureorcontrolisaheadypromulgatedandscheduledtobeimplementedatthefederalorstatelevelatsuchtimeaflertheexceedance,andthatmeasu¡eorcont¡olisdeterminedtobesufficienttoaddresstheupwardtrendinairquality,additional[oca]measuresmaybeunnecessary."Comment:PleaseensurethatDelawaresharestheresultsofitsstudywithEPA,especiallyifDelawaredeterminesthatnocontingencymeasureswillbetriggered.EPAsuggestsinsertingthefollowinglanguage."Delawar¿willsubmí¡loEPAananqlvsvlo¡lerrro4stratelhepronosedmegsuresøreodcqualetorclurntheãrcoloøltdlnmenl"Measures:footnote24"Thisscheduleinitiateswithcertificationofambientairqualitymonitoringdataindicatingaviolationofthe200624-hourPM2.sNAAQS."CoI4{nen!.Anactionlevelresponseisfiggeredbyaviolationaswella-swhenatwo-yearaverageofthe98thpercentile24-hourPlrdzsconcentrationis35.5¡rg/m'orgreater.Footnote24shouldberevisedtoreflecttlat.