UNITEDSTATESENVIRONMENTALPROTECTIONAGENCYREGIONIII1650ArchStreetPhiladelphia,Pennsylvania19103-2029SUBJECT:DelawareDept.ofNaturalResourcesandJuly12,2012EnvironmentalQualityPSD/NNSRSIPRevisionRequestsFROM:GerallynDukeOfficeofPermitsandAirToxicsAirProtectionDivisionTO:KathleenCox,AssociateDirectorOfficeofPermitsandAirToxicsApprovalandPromulgationofAirQualityImplementationPlans;Delaware;PreventionofSignificantDeteriorationandNonattainmentNewSourceReview;FineParticulateMatter(PM25)I.BackgroundEPAisproposingtoapproveaStateImplementationPlan(SIP)revisionsubmittedbytheStateofDelawareonMarch14,2012.ThisSIPrevisionpertainingtoDelaware’sPreventionofSignificantDeterioration(PSD)andnonattainmentNewSourceReview(NSR)programsincorporatespreconstructionpermittingrequirementsforfineparticulatematter(PM2.5)intotheDelawareSIP.Inaddition,EPAisproposingtoapproveSIPrevisionsandportionsofSIPsubmissionssubmittedbytheStateofDelawareonDecember13,2007,March12,2008,September19,2008,September16,2009,April1,2010andOctober17,2011forthepurposeofdeterminingthatDelawarehasmetitsstatutoryobligationsthatrelatetothePSDrequirementsundersection110(a)(2)(D)(i)(II)forthe1997PM25andozoneNAAQSandthe2006PM2.5NAAQS,aswellassections110(a)(2)(C),(D)(i)(II),and(J)forthe2008leadNAAQS.EPAisapprovingtheserevisionsinaccordancewiththerequirementsoftheCleanAirAct(CAA).ILSummaryofActionTheMarch2012SIPrevisionsubmittedbyDelawareconsistsofamendmentstothegeneralprovisionsof7DEAdmin.Code1125,RequirementsforPreconstructionReview.Therevisionfulfillsthefederalprogramrequirementsestablishedbythe2008NSRPM2.5Rule.Theamendmentsestablishthemajorsourcethreshold,significantemissionrateandoffsetratiosforPM25,establishnitrogenoxides(NO)andsulfurdioxide(SO2)asprecursorstoPM2.5,andestablishtheallowanceforinterpollutanttradingforoffsetsandNSRapplicabilitytoPM2.5precursorpollutants,pursuanttotheMay2008NSRPM2.5Rule.Delaware’sproposedSIPrevisiondoesnotincludethe“grandfathering”northepresumptivelyapprovableinterpollutanttradingratioprovisionsthathavesubsequentlybeenrepealed/reconsidered.Finally,theamendmentsaddmaximumallowableincreasesinambientpollutantconcentrations(increments)andasignificantmonitoringconcentration(SMC)forPM2.5pursuanttotheOctober2010PSDPM25Rule.TheamendmentssubmittedinMarch2012byDelawareforapprovalintotheSIPwereadoptedbyDelawareonJanuary17,2012andbecameeffectiveonFebruary11,2012.TheyadddefinitionsinSection1(GeneralProvisions),andalsoincluderevisionstoSection2(EmissionOffsetProvisions)andSection3(PreventionofSignificantDeteriorationofAirQuality)under7DEAdmin.Code1125—RequirementsforPreconstructionReview.TheamendmentsestablishSignificantImpactLevels(SILs)forPM2,5(SeeSection3.9)pursuanttotheOctober2010PSDPM2,5Rule.WeareproposingtotakenoactionatthistimewithregardtothatspecificprovisionintheSIPrevision.Finally,somechangestoDelaware’srulesthatdonotrelatetoPM2.5alsowereincludedintheMarch2012SIPrevision.SinceDelawaredidnotrequestEPAtotakeactiononthoseparticularchanges,wearenotdoingso’.III.AnalysisA.PM2.5Fineparticlesintheatmospherearemadeupofacomplexmixtureofcomponents.Commonconstituentsincludesulfate(SO4);nitrate(NO3);ammonium;elementalcarbon;agreatvarietyoforganiccompounds;andinorganicmaterial(includingmetals,dust,seasalt,andothertraceelements)generallyreferredtoas“crustal”material,althoughitmaycontainmaterialfromothersources.Airborneparticulatematter(PM)withanominalaerodynamicdiameterof2.5micrometersorless(amicrometerisone-millionthofameter,and2.5micrometersislessthanonesevenththeaveragewidthofahumanhair)areconsideredtobe“fineparticles”andarealsoknownasPM2.5“Primary”particlesareemitteddirectlyintotheairasasolidorliquidparticle(e.g.,elementalcarbonfromdieselenginesorfireactivities,orcondensableorganicparticlesfromgasolineengines).“Secondary”particles(e.g.,sulfateandnitrate)formintheatmosphereasaresultofvariouschemicalreactions.ThehealtheffectsassociatedwithexposuretoPM2.5includepotentialaggravationofrespiratoryandcardiovasculardisease(i.e.,lungdisease,decreasedlungfunctionasthmaattacksandcertaincardiovascularissues).EpidemiologicalstudieshaveindicatedacorrelationbetweenelevatedPM2.5levelsandprematuremortality.GroupsconsideredespeciallysensitivetoPM2,5exposureincludeolderadults,children,andindividualswithheartandlungdiseases.FormoredetailsregardinghealtheffectsandPM2.5seeEPA’sWebsiteathttp.vYt’wwepa.gow”oar/particiepoliution/(seeheading“HealthandWelfare”).OnJuly18,1997,EPArevisedtheNAAQSforPMtoaddnewstandardsforfineparticles,usingPM2.5astheindicator.Previously,EPAusedPM10(inhalableparticlessmallerthanorequalto10micrometersindiameter)astheindicatorforthePMNAAQS.EPAestablishedhealth-based‘SeeGuidelinesforPreparingLettersSubmittingStateImplementationPlans(SIPs)toEPAandforPreparingPublicNoticesforSIPs,fromJanetMcCabeandBeckyWebertoAirDivisionDirectors,Regions1-10datedNovember22,2011.2C:(primary)annualand24-hourstandardsforPM2.5,settinganannualstandardatalevelof15microgramspercubicmeter(jig/rn3)anda24-hourstandardatalevelof65jig/rn3(62FR38652).Atthetimethe1997primarystandardswereestablished,EPAalsoestablishedwelfare-based(secondary)standardsidenticaltotheprimarystandards.ThesecondarystandardsaredesignedtoprotectagainstmajorenvironmentaleffectsofPM2.5,suchasvisibilityimpairment,soiling,andmaterialsdamage.OnOctober17,2006,EPArevisedtheprimaryandsecondaryNAAQSforPM2.5Inthatrulemaking,EPAreducedthe24-hourNAAQSforPM2.5to35jig/rn3andretainedtheexistingannualPM2.5NAAQSof15j.tg/m3(71FR61236).1.ImplementationofNSRRequirementsforPM25—theNSRPM2.5RuleOnOctober23,1997,theAgencyissuedaguidancedocumentwrittenbyJohnSeitzentitled“InterimImplementationofNewSourceReviewRequirementsforPM25”(SeitzMemo).TheSeitzMemowasdesignedtohelpstatesimplementNSRrequirementspertainingtothenewPM2.5NAAQSinlightoftechnicaldifficultiesposedbyPM2.5atthattime.Specifically,theSeitzMemostated:“PM10mayproperlybeusedasasurrogateforPM2.5inmeetingNSRrequirementsuntilthesedifficultiesareresolved.”EPAalsoissuedaguidancedocumententitled“ImplementationofNewSourceReviewRequirementsinPM2.5NonattainmentAreas”(the“2005PM2.5NonattainmentNSRGuidance”),onApril5,2005,thedatethatEPA’sPM2.5nonattainmentareadesignationsbecameeffectiveforthe1997NAAQS.ThismemorandumprovidedguidanceontheimplementationofthenonattainmentmajorNSRprovisionsinPM2.5nonattainmentareasintheinterimperiodbetweentheeffectivedateofthePM2.5nonattainmentareadesignations(April5,2005)andEPA’spromulgationoffinalPM2.5nonattainmentNSRregulations.Besidesre-affirmingthecontinuationofthePM10SurrogatePolicyforPM2.5attainmentareassetforthintheSeitzMemo,the2005PM2.5nonattainmentNSRGuidancerecommendedthatuntilEPApromulgatedthePM2.5majorNSRregulations,“StatesshoulduseaPM10nonattainmentmajorNSRprogramasasurrogatetoaddresstherequirementsofnonattainmentmajorNSRforthePM2.5NAAQS.”OnMay16,2008,EPAfinalizedarule(theNSRPM2.5Rule)toimplementthe1997PM2.5NAAQS,includingchangestotheNSRprogram(73FR28321).The2008NSRPM2.5RulerevisedtheNSRprogramrequirementstoestablishtheframeworkforimplementingpreconstructionpermitreviewforthePM2.5NAAQSinbothattainmentandnonattainmentareas.The2008NSRPM2.5RulerequiredthatmajorstationarysourcesseekingpermitsmustdirectlysatisfythePM2.5requirements,asoftheeffectivedateoftherule,ratherthanrelyingonPM10asasurrogate,withtwoexceptions.Thefirstexceptionwasa“grandfathering”provisionintheFederalPSDprogramat40CFR52.21(i)(1)(xi).Thisgrandfatheringprovisionappliedtosourcesthathadappliedfor,buthadnotyetreceived,afinalandeffectivePSDpermitbeforetheJuly15,2008,effectivedateoftheMay2008finalrule.ThesecondexceptionwasthatstateswithSIP-approvedPSDprogramscouldcontinuetoimplementtheSeitzMemo’sPM10SurrogatePolicyforuptothreeyears(untilMay2011)oruntiltheindividualrevisedstatePSDprogramsforPM2.5areapprovedbyEPA,whichevercamefirst.ForadditionalinformationontheNSRPM2.5Rule,see73FR28321.OnFebruary11,2010,EPAproposedtorepealthegrandfatheringprovisionforPM2.5containedinthefederalPSDprogramat40CFR52.21(i)(1)(xi)andtoendearlythePM10SurrogatePolicyapplicableinstatesthathaveaSIP-approvedPSDprogram(75FR6827).InSCCsupportofthisproposal,EPAexplainedthatthePM2.5implementationissuesthatledtotheadoptionofthePM10SurrogatePolicyin1997havebeenlargelyresolvedtoadegreesufficientforsourcesandpermittingauthoritiestoconductmeaningfulpermit-relatedPM2.5analyses.TherepealofthegrandfatheringrulewasfinalizedonMay18,2011(76FR28646).The2008NSRPM25RulealsoestablishedthefollowingNSRrequirementstoimplementthePM2.5NAAQS:(1)RequireNSRpermitstoaddressdirectlyemittedPM2.5andprecursorpollutants;(2)establishsignificantemissionratesfordirectPM2.5andprecursorpollutants(includingSO2andNOx);(3)establishPM2.5emissionoffsets;and(4)requirestatestoaccountforgasesthatcondensetoformparticles(condensables)inPM2.5emissionlimits.Additionally,the2008finalruleauthorizedstatestoadoptprovisionsintheirnonattainmentNSRrulesthatwouldallowmajorstationarysourcesandmajormodificationslocatinginareasdesignatednonattainmentforPM2.5tooffsetemissionsincreasesofdirectPM2.5emissionsorPM2.5precursorswithreductionsofeitherdirectPM2.5emissionsorPM2.5precursorsinaccordancewithoffsetratioscontainedintheapprovedSIPfortheapplicablenonattainmentarea.Theinclusion,inwholeorinpart,oftheinterpollutantoffsetprovisionsforPM2.5isdiscretionaryonthepartofthestates.Inthepreambletothe2008finalrule,EPAincludedpreferredorpresumptiveoffsetratios,applicabletospecificPM2.5precursorsthatstatesmayadoptinconjunctionwiththenewinterpollutantoffsetprovisionsforPM2.5andforwhichthestatecouldrelyontheEPA’stechnicalworktodemonstratetheadequacyoftheratiosforuseinanyPM2.5nonattainmentarea.Alternatively,thepreambleindicatedthatstatesmayadopttheirownratios,subjecttotheEPA’sapproval,thatwouldhavetobesubstantiatedbymodelingorothertechnicaldemonstrationsofthenetairqualitybenefitforambientPM2.5concentrations.Thepreferredratiosweresubsequentlythesubjectofapetitionforreconsideration,whichtheAdministratorgranted.EPAcontinuestosupportthebasicpolicythatsourcesmayoffsetincreasesinemissionsofdirectPM2.5orofanyPM2.5precursorinaPM2.5nonattainmentareawithactualemissionsreductionsindirectPM2.5orPM2.5precursorsinaccordancewithoffsetratiosasapprovedintheSIPfortheapplicablenonattainmentarea.However,wenolongerconsiderthepreferredratiossetforthinthepreambletothe2008finalruleforPM2.5NSRimplementationtobepresumptivelyapprovable.Instead,anyratioinvolvingPM2.5precursorsadoptedbythestateforuseintheinterpollutantoffsetprogramforPM2.5nonattainnientareasmustbeaccompaniedbyatechnicaldemonstrationthatshowsthenetairqualitybenefitsofsuchratioforthePM2.5nonattainnientareainwhichitwillbeapplied.2.PSDPM2.5RuleOnOctober20,2010(75FR64865),EPApromulgatedthefinal“PreventionofSignificantDeterioration(PSD)forParticulateMatterlessthan2.5Micrometers(PM2.s)—Increments,SignificantImpactLevels(SILs)andSignificantMonitoringConcentration(SMC)”(PSDPM2.5Rule).ThatrulemakingfinalizedcertainprogramprovisionsundertheregulationstopreventsignificantdeteriorationofairqualityduetoemissionsofPM2.5(i.e.,underthePM2.5PSDregulations).ThisfinalrulesupplementedthefinalimplementationruleforPM2.5,knownastheCleanAirFineParticleImplementationRule(CAFPIR)thatwepromulgatedonApril25,2007(72FR20586),andthePM2.5NSRImplementationRulethatwepromulgatedonMay16,2008(7340CFR28321).Together,thesethreerulesestablishedaregulatoryframeworkforimplementationofaPM2.5programinanyarea.Thisfinalruleestablishedincrements,SILs,andanSMCforPM25tofacilitateambientairqualitymonitoringandmodelingunderthePSDregulationsforareasdesignatedattainmentorunclassifiableforPM25.Belowisabriefdiscussionofincrements,SILs,andSMCs.AmoredetaileddiscussioncanbefoundinthepreambletothefinalPSDPM25Rule.a.IncrementsAnincrementisthemaximumallowablelevelofambientpollutantconcentrationincreasethatisallowedtooccurabovetheapplicablebaselineconcentrationinaparticulararea.Assuch,anincrementdefines“significantdeterioration.”TheOctober2010rulemakingestablishedincrementsforPM2.5pursuanttothelegalauthoritycontainedinsection166(a)oftheCAAforpollutantsforwhichNAAQSarepromulgatedafter1977.Asdiscussedinthatfinalrulemakingaction,theincrementsforPM2.5becameapplicableonOctober20,2011inordertocomplywithsection166(b)oftheAct.ThisfinalruledidnotrevoketheannualincrementsforPM10asproposedunderOption1inthe2007noticeofproposedrulemaking.Thus,weretainedthe24-hourandannualPM10incrementsinadditiontoaddingPM25increments.b.SignificantImpactLevels(SILs)TheOctober2010rulemakingalsoestablishedSILsforPM2.5forevaluatingtheimpactaproposednewsourceormodificationmayhaveontheNAAQSandPSDincrementsforPM25.ItisEPA’slongstandingpolicytoallowtheuseoftheSILsasdeminimisthresholdsundertheNSRprogramsat40CFR51.165(b)andpart51,AppendixS,todeterminewhetherthepredictedambientimpactresultingfromtheemissionsincreaseataproposedmajornewstationarysourceormodificationisconsideredtocauseorcontributetoaviolationoftheNAAQS.WehavealsoallowedtheSILsunderthePSDprogramtodetermine:(1)Whenaproposedsource’sambientimpactswarrantacomprehensive(cumulative)sourceimpactanalysis;(2)thesizeoftheimpactareawithinwhichtheairqualityanalysisiscompleted,and(3)whethertheemissionsincreasefromaproposednewmajorstationarysourceormajormodificationisconsideredtocauseorcontributetoaviolationofanyNAAQS.TheSILsforPM2.5weredevelopedbyscalingtheexistingPM10SILsusingaPM25-to-PM10NAAQSratio.c.SignificantMonitoringConcentration(SMC)Finally,theOctober2010rulemakingestablishedtheSMCforPM2.5as4jig/m3PM2.5(24-houraverage).EPAanditsdelegatedreviewingauthoritiesusethePM2.5SMCtodeterminewhenitmaybeappropriatetoexemptaproposednewmajorstationarysourceormajormodificationfromtheambientmonitoringdatarequirementsunderthePSDrules.Similarly,stateswithEPA-approvedPSDprogramsthatadopttheSMCforPM2.5mayusetheSMC,onceitispartofanapprovedSIP,todeterminewhenitmaybeappropriatetoexemptaparticularmajorstationarysourceormajormodificationfromthemonitoringrequirementsundertheirStatePSDprograms(See40CFR51.166(i)(5)).50TherevisionssubmittedbytheStateofDelawaretoaddressthenewPSDrequirementsforPM2.5pursuanttotheEPA’sOctober20,2010finalruleincludetheregulatorytextat40CFR51.166(k)(2),concerningtheimplementationofSILsforPM25(See,7DEAdmin.Code1125Section3.9(SourceImpactAnalysis)).Westatedinthepreambletothe2010finalrulethatwedonotconsidertheSILstobeamandatorySIPelement,butregardthemasdiscretionaryonthepartofpermittingauthorityforuseinthePSDpermittingprocess.Nevertheless,thePM2.5SILsarecurrentlythesubjectoflitigationbeforetheU.S.CourtofAppeals(D.C.Circuit).Inresponsetothatlitigation,theEPAhasrequestedthattheCourtremandandvacatetheregulatorytextintheEPA’sPSDregulationsatparagraph(k)(2)sothattheEPAcanmakenecessaryrulemakingrevisionstothattext.InlightofEPA’srequestforremandandvacaturandouracknowledgementoftheneedtorevisetheregulatorytextpresentlycontainedatparagraph(k)(2)ofsections51.166and52.21,wedonotbelievethatitisappropriateatthistimetoapprovethatportionoftheState’sSIPrevisionthatcontainstheaffectedregulatorytextintheState’sPSDregulations,specificallynewSection3.9of7DEAdmin.Code1125.Instead,wearetakingnoactionatthistimewithregardtothatspecificprovisioncontainedintheSIPrevision.B.InfrastructureWheneveraneworrevisedNAAQSispromulgated,section110(a)oftheCAAimposesobligationsuponstatestosubmitSIPrevisionsthatprovidefortheimplementation,maintenance,andenforcementoftheneworrevisedNAAQSwithinthreeyearsfollowingthepromulgationofsuchNAAQS-thesocalledinfrastructureSIPrevisions.Althoughstatestypicallyhavemetmanyofthebasicprogramelementsrequiredinsection110(a)(2)throughearlierSIPsubmissionsinconnectionwithpreviousPMstandards,states(includingalltheEPARegion3states)werestillrequiredtosubmitSIPrevisionsthataddresssection110(a)(2)forthe1997and2006PM2.5NAAQS.InadditiontotheMarch2012SIPsubmission,DelawarehaspreviouslysubmittedproposedSIPrevisions,datedDecember13,2007,September19,2008,September16,20092,andApril1,2010,addressingrequirementssetforthinCAAsection110(a)(2)fortheozoneNAAQS,includingthose110(a)(2)requirementsrelatedtoDelaware’sPSDandNSRpermittingprogram.BecausetheseSIPsubmissionsaddressedDelaware’scompliancewithCAAsection110(a)(2),theseSIPsubmissionsarereferredtoasInfrastructureSIPsubmissions.Thesesubmissionscollectivelyaddressednumerousobligationspursuantto110(a)(2),includingportionsof110(a)(2)(C),(D)(i)(II)and(J)relatingtoDelaware’sPSDpermitprogramfortheozoneNAAQS.OnAugust4,2011,EPAtookfinalactiononallportionsoftheDecember2007,September2008andSeptember2009submittalsexceptfortheportionsthataddressedtheobligationssetforthin110(a)(2)(C),(D)(i)(II)and(J)relatingtoDelaware’sPSDPermitProgramforthe1997ozoneNAAQS.See76FR47068.OnSeptember20,2011,EPAtookfinalactionontheportionsofthesubmittaldatedApril1,2010pertainingtotheCAAsectionof110(a)(2)(C)and(J)relatingtoDelaware’sPSDPermitProgramforthe1997ozoneNAAQS.See76FR58120.Bytoday’saction,EPAisaddressingtheportionofDelaware’sDecember2007,September2008,September2ReceivedSeptember21,20096CC2009andApril2010submittalswhichpertaintotheobligationssetforthatCAAsections110(a)(2)(D)(i)(II)relatingtoDelaware’sPSDpermitprogramforthe1997ozoneNAAQS.Delaware’spreviousinfrastructureSIPsubmissionsaddressedrequirementssetforthinCAAsection110(a)(2)forthe1997PM2.5NAAQS,includingthose110(a)(2)requirementsrelatedtoDelaware’sPSDandNSRpermittingprogram.BysubmissionsdatedDecember13,2007,March12,2008,andSeptember16,2009,DelawareprovidedInfrastructureSIPsubmissionswhichidentifiedhowitsSIPmetseveraloftheobligationssetforthinCAAsection110(a)(2)forthe1997PM2.5NAAQS.Eachofthesesubmissionsaddressednumerousobligationspursuantto110(a)(2),includingportionsof110(a)(2)(C),(D)(i)(II)and(J)relatingtoDelaware’sPSDpermitprogramforthe1997PM2.5NAAQS.OnAugust4,2011,EPAtookfinalactiononallportionsofthesesubmittalsexceptfortheportionsthataddressedtheobligationssetforthin110(a)(2)(D)(i)(II)relatingtoDelaware’sPSDPermitProgram.See76FR47068.Bytoday’saction,EPAisaddressingtheportionsofDelaware’sDecember2007,March2008,andSeptember2009submissionswhichpertaintotheobligationssetforthatCAAsections110(a)(2)(D)(i)(II)relatingtoDelaware’sPSDpermitprogramforthe1997PM2.5NAAQS.ByletteronSeptember16,2009,DelawarealsoaddressedseveralrequirementsofCAAsection110(a)(2),including110(a)(2)(D)(i)(II),forthe2006PM2.5NAAQS.OnAugust4,2011,EPAtookfinalactiononallportionsofthissubmittalexceptfortheportionthataddressedtheobligationssetforthin110(a)(2)(D)(i)(II)relatingtoDelaware’sPSDPermitProgramforthe2006PM2.5NAAQS.Bytoday’saction,EPAisaddressingtheportionsofDelaware’sSeptember2009submittalwhichaddresstheobligationssetforthatCAAsection110(a)(2)(D)(i)(II)relatingtotheDelawarePSDpermitprogramforthe2006PM2.5NAAQS.BasedontheSeptember2009submission,EPAismakingadeterminationthatDelawarehasmetitsobligationsrelatingtothePSDpermitprogrampursuanttoCAAsection110(a)(2)(D)(i)(II)forthe2006PM2.5NAAQS.Finally,onOctober17,2011,DelawaresubmittedanInfrastructureSIPtoaddresshowitsSIPmeetsCAAsection110(a)(2)requiredforthe2008leadNAAQS.UnlikePM25,therehavebeennonewPSDprogramrequirementsassociatedwiththe2008leadNAAQS.Thissubmissionaddressednumerousobligationspursuantto110(a)(2),includingportionsof110(a)(2)(C),(D)(i)(II)and(J)relatingtoDelaware’sPSDpermitprogramforthe2008leadNAAQS.Basedonthissubmittalaswellasalloftheabovedescribedsubmissions,EPAismakingthedeterminationthatDelawarehasmetitsobligationsrelatedtothePSDpermitprogrampursuanttosections110(a)(2)(C),(D)(i)(II)and(J)forthe2008leadNAAQS.Section110(a)(2)(C)oftheCAArequireseachstate’simplementationplanto“includeaprogramtoprovidefortheenforcementofthemeasuresdescribedin[CAASection110(a)(2)(A)],andregulationofthemodificationandconstructionofanystationarysourcewithintheareascoveredbytheplanasnecessarytoensurethatnationalambientairqualitystandardsareachieved,includinga•permitprogramasrequiredinpartsC[PSDJ,andD[nonattainmentNSR].”Similarly,CAASection110(a)(2)(J)requiresthat,foreachNAAQS,theState’sSIP“meettheapplicablerequirementsof....partCof[SubchapterI](relatingtopreventionofsignificantdeteriorationofairquality...).“WiththeadditionofthePM2.5requirementsdescribedabove,Delaware’snonattainmentNSRandPSDprogramscontainalloftheemissionlimitationsandcontrolmeasuresandotherprogramelementsrequiredby40CFR51.165and40CFR51.166relatedtothelead7CVNAAQS.Therefore,Delaware’sSIPmeetsthestatutoryobligationsrelatingtoitsPSDpermitprogramsetforthatCAASectiOns110(a)(2)(C)and(J)forthe2008leadNAAQS.CAASection110(a)(2)(D)(i)(IJ)requireseachstate’simplementationplantoincludeprovisionswhichwillpreventemissionsfrominterferingwiththemeasuresrequiredbyanotherstateforimplementingPSD.Eachstate’sSIPmust,under40CFR51.166(k)(1),includeasourceimpactanalysiswhichrequirestheowner/operatorofeachproposedsourceormodificationtodemonstratethattheallowableemissionsincreasefromtheproposedprojectwillnot“causeorcontributetoairpollutioninviolationof:(1)Anynationalambientairqualitystandardinanyairqualitycontrolregion(emphasisadded).”Therequirementssetforthat40CFR51.166(k)(1)areconsistentwith,andsufficienttomeet,therequirementssetforthatCAASection110(D)(i)(II).InDelaware,theequivalentrequirementiscodifiedat7DEAdmin.Code1125.ThisrequirementisincorporatedintotheDelawareSIPandisapplicabletothe1997ozoneandPM2.5NAAQSandthe2006PM2.5NAAQS.Therefore,thepreviouslyapprovedSIPrevisions,togetherwiththeincorporationofthePM2.5requirementsdescribedaboveandtherelevantportionsofDelaware’sDecember2007,March2008,September2008,September2009,andApril1,2010InfrastructureSIPsubmittals,supportthefindingthatDelawarehasmetitsstatutoryobligationsunderCAASection110(a)(2)(D)(i)(II)forthe1997ozoneandPM2.5NAAQSandforthe2006PM2.5NAAQS.Similarly,becauseDelaware’sOctober2011SIPrevisionincludesaprovisionthatisconsistentwith40CFR51.166(k)andthatissufficienttomeettherequirementssetforthatCAASection110(a)(2)(D)(i)(II)forthe2008leadNAAQS,DelawarehasdemonstratedthatithasmettheportionsofCAASection110(a)(2)(D)(i)(II)whichpertaintoitsPSDpermitprogramforthe2008leadNAAQS.IV.RecommendedAgencyActionIfindthattheproposedrevisionsareconsistentwithFederalregulations,andincorporaterequiredprogramelementsintoDelaware’sPSDandnonattainmentNSRprograms.Additionally,IfindthattheMarch14,2012submittal,inconjunctionwiththepreviouslysubmittedinfrastructureSIPrevisionssupportafindingthatDelawarehasmetitsobligationswithrespecttoCAAsection110(a)(2)asdiscussedabove.ThereforeIrecommendapprovaloftheproposedrevisionstotheDelawareSIP.8