PennsylvaniaDepartmentofEnvironmentalProtectionRachelCarsonStateOfficeBuildingP.O.Box2063Harrisburg,PA17105-2063June17,2011Secretary717-787-2814Mr.ShawnM.GarvinRegionalAdministratorU.S.EnvironmentalProtectionAgency,RegionIIIRECEIVED1650ArchStreet(MailCode:3RAOO)Philadelphia,PA19103-2029DivisionDirector(3APOO)DearMr.Garvin:InApril2005,theU.S.EnvironmentalProtectionAgency(EPA)designatedtheLiberty-ClairtonPM25Area,whichincludestheCityofClairtonandtheboroughsofGlassport,Liberty,Lincoln,andPortVue,asaseparate“partialcounty”(Allegheny)fineparticulatematter(PM25)nonattainmentarea(Liberty-ClairtonPM2.5Area)forthe1997PM2.5nationalambientairqualitystandard(NAAQS)becauseofthelocalizedimpactofcertainsourcesinthearea.TheDepartmentofEnvironmentalProtection(DEP)isherebywithdrawingtheJune25,2010,StateImplementationPlan(SIP)revisionpertainingtotheattainmentdemonstrationandbase-yearinventoryfortheLiberty-ClairtonPM2.5Areaandsubmittinganewattainmentdemonstrationandbase-yearinventoryfortheareaforapprovalasarevisiontoAlleghenyCounty’sportionoftheSIP,underSection172oftheCleanAirAct(CAA),42U.S.C.§7502.TheJune2011SIPrevisionshouldcontinuetobeidentifiedasrevision67fortheAlleghenyCountyHealthDepartment’s(ACHD)internaltrackingsystem.IhaveenclosedahardcopyandcompactdiskofthereplacementSIPsubmittalfortheLiberty-ClairtonPM2.5Area,whichconsistsofthefollowingdocuments:(1)anattainmentdemonstrationandbase-yearinventory,ananalysisofreasonablefurtherprogress,analysisofreasonablyavailablecontrolmeasures,amobilesourceemissionbudgetforpurposesoftransportationconformity,andadescriptionofcontingencymeasuresthatwillbeimplementedtobringtheareabackintoattainmentshouldviolationsofthe1997PM2.5NAAQSoccurafterthestandardisattained;(2)certificationofpublicparticipationactivitiesandproofofpublicationofpublichearingnotices;(3)technicalappendices(appendicesconsistingofdatafilesareprovidedinelectronicformonly);and(4)thecommentandresponsedocument.Icertifythattheelectronicfilesareexactduplicatesofthehardcopies.TheACHDopenedthepubliccommentperiodforthisLiberty-ClairtonPM2.5SIPrevisiononNovember15,2010;apublichearingwasheldonDecember16,2010,andthecommentperiodclosedonDecember16,2010.TheCountyBoardofHealthapprovedtheenclosedSIPrevisionattheirmeetingonMarch10,2011.AnEqualOpportunityEmployerwww.dep.state.pa.usPrintedonRecycledPaperMr.ShawnM.Garvin2June17,2011Inaddition,thisSIPsubmittalalsoincludesamendmentstoACHD,ArticleXXI,AirPollutionControl,Section2101.10(relatingtoambientairqualitystandards)andSection2101.20(relatingtodefinitions).TheCAArequiresattainmentofthe1997annualPM2.5NAAQSbynolaterthanApril5,2010,unlessanextensionofuptofiveyearsisapprovedbyEPA.ThereplacementSIPrevisionforthe1997PM2.5standardrequestsandexplainstheneedforafive-yearextensionoftheattainmentdatetoApril5,2015,basedonthetimeframerequiredforimplementationoftheproposedcontrols.TheattainmentdemonstrationmodelingutilizestheCALPUFFmodelinanear-fieldapplication.Thereasonsfortheuseofthismodel,modelingprotocol,andmodelingresultsareincludedintheSIPrevisionandweresubjecttopubliccomment.DEPisalsosubmittingthisdocumenttosatisfytherequirementsof40CFRPart51.1011foramid-coursereview.DEPisalsosubmittingthisdocumenttosatisfythemid-coursereviewrequirementsof40CFR§51.1011(relatingtorequirementsformid-coursereview).Asyouknow,ACHDisalocalhealthagencyorganizedundertheLocalHealthAdministrationLaw,Act315ofAugust24,1951,P.L.1304,asamended,whosepowersanddutiesincludetheenforcementoflawsrelatingtopublichealthwithinAlleghenyCounty.ThecountyadministersalocalairpollutioncontrolprogramapprovedbyDEPinaccordancewithSection12oftheAirPollutionControlAct.35P.S.§4012.WelookforwardtoworkingwithEPAtoobtainapprovaloftheSIPrevisionfortheLiberty-ClairtonPM2.5Area.Shouldyouhaveanyquestionsorneedadditionalinformation,pleasecontactJoyceE.Epps,Director,BureauofAirQuality,bye-mailatjeepps@state.pa.usorbytelephoneat717-787-9702.YoumayalsocontactJamesE.Thompson,Manager,ACHDAirQualityProgram,bye-mailatjthompson@achd.netorbytelephoneat412-578-7961MichaelL.KrancerSecretaryEnclosures