IUNITED STATES ENVIRONMENTALPROTECTIONAGENCYREGION4ATLANTA FEDERAL CENTER61FORSYTH STREETATLANTA, GEORGIA 30303-8960OCT242011Mr.BarryStephensDirector, DivisionofAirPollutionControlTennessee DepartmentofEnvironmentalConservtion401 ChurchStreet9'Floor,L&CAnnexNashville, Tennessee37243-1 53 1DearMr.Stepns:pib:.Thankyoufor submittingtheStateofTennessee's2011annual ambientair monitoringnetworkplan(NetworkPlan),dated July1,2011.TheNetwork Planisrequiredby40CodeofFederalRegulations(CFR)$58.10 andcoversthe networksoperatedbythe Tennessee DepartmentofEnvironmentandConservation'sDivisionofAirPollution.Controlandthe local air pollution control agenciesinTennessee.Thelocal agenciescovered bythisNetwork Plan include: theKnoxCounty HealthDepartment'sDepartment ofAirQuality Management, Chattanooga-HamiltonCounty'sAirPollutionControlBureautheMemphis/ShelbyCounty HealthDepartment's AirPollution ControlProgram, andtheNashvilleMetropolitanHealth Department'sDivisionofAirPollutionControl.TheU.S.EnvironmentalProtectionAgencyRegion 4understands that TDEC providedthe public a30-dayreviewperiod. Publiccomments were receivedfiomtwocommentersregarding theNetwork Plan.Onecommenter,a citizen,supported the Network Plan.Theothercommenter,EPARegion4,providedtechnicalcommentswhich were addressedinfullbyTennessee initsfinalsubmittal.BaseduponourreviewoftheNetworkPlan,EPARegion4hasdeterminedthat theplansatisfies theapplicable requirementsof40CFRPart58.TheNetwork Planisapproved.Commentsandrecommendationsonthedocumentareenclosed.Thankyouforworking withustomonitor airpollutionand promotehealthyair qualityinTennesseeandthenation.Ifyouhave any questionsorconcerns,please contactDougNeeleyat (404)562-9097orStacy Harderat(404)562-9042.Sincerely,Gwendolyn Keyes Fleming.RegionalAdministratorEnclosuresInternetAddress(URL)http://www.epa.govRecycledlRecyclablePrintedwlthVegetable011BasedInksonRecycledPaper(Minrmum30%Postconsumer)cc: Mr.RobertColbyDirector,Chattanooga-Hamilton CountyAirPollution ControlBureauMs.LynneLiddingtonDirector,KnoxCounty Health Department,DepartmentofAir QualityManagementMr.Rob Raney,PEDirector,Nashville1DavidsonCo.MetroHealth DepartmentDivisionof AirPollution ControlMr.RobertRogersManager,Memphis-ShelbyCountyHealth DepartmentAir Pollution ControlSectionFY2011Stateof TennesseeAmbientAirMonitoring NetworkPlanU.S.EPARegion4Commentsand RecommendationsThisdocumentcontainsU.S.~&ronmentalProtectionAgency Region4comments andrecommendationsontheStateofTennesseeDepartment of Environment andConservation's(TDEC)2011ambientairmonitoringnetwork plan(NetworkPlan). Ambientair monitoring rules, which includeregulatory requirements thataddressnetworkplans,datacertification,and minimummonitoringrequirements,among otherrequirements,arefoundin40CFRPart58.Minimummonitoringrequirementsfor criteria pollutants are listed in 40CFR Part 58, AppendixD.Minimummonitoringrequirementsdonotexist forcarbonmonoxide(CO)unlessrequired by theestablishmentofaNationalCore(NCore)multipollutantmonitoring station,andlorastateimplementationplan. However, newnational ambientairquality standards(NAAQS) were promulgatedin2010fornitrogen dioxide (NO2)andsulfur dioxide(SO2)with minimummonitoring requirements effective January1,2013.MonitoringrequirementsforNO2willbeaddressedin2012 Network Plans. Additionalinformation pertainingtoNO2anda technical assistancedocumentcanbefound at:http://www.epa.nov/tt~~/amtic/nearroad.html.Minimummonitoring requirements are listedfor ozone(03),particulate matterlessthan2.5microns(PM2.5),particulate matterlessthan 10 microns(PMlo),lead(Pb), andSO2.Theminimummonitoringrequirementsarebasedonmetropolitan statisticalarea (MSA)boundariesasdefinedbytheUS.OfficeofManagement and Budget (OMB), July1,2009,populationestimatesfiomtheU.S.CensusBureau andhistoricalambientairmonitoringdata.OMBcurrently defines10MSAsintheStateofTennessee.TheseMSAsand therespectiveJuly1,2009,populationestimatesfromtheUS.CensusBureauareshown in Table1.Table1:TennesseeMetropolitanStatisticalAreas and Populations,MSANamePopulationChattanooga,TN-GA524,303Clarksville.TN-KY268.546Cleveland.TN113.358Jackson,TN113,629Johnson City,TN197,381Kingsport-Bristol-Bristol,TN-VA305,629Knoxville.TN699.247Memphis,TN-MS-AR1,304,926Morristown.TN137.612MinimumO3Monitoring~e~uirements40CFRPart 58,AppendixD,TableD-2Thenetworkdescribedinthe2011NetworkPlan meets theminimumO3monitoringrequirementsspecifiedby40CFRPart 58,AppendixD,TableD-2inall areas.TheNetwork Planstatesthat Chattanooga-HamiltonCounty planstorelocate theEastsideUtilityDistrictO3monitor(AQS 47-065-4003)beforethestartofthe2012ozone seasonduetocontinueddifficultyin accessingthesite.Pleasenotethat assoon asanewsiteisselected,revisionstothenetwork,including discontinuationorrelocationofamonitor, must be formally submitted to EPA forapproval.Additionally, the MorristownMSAisrequiredtohave,andis currentlyoperating,oneO3monitor-(AQS47-089-0002). However,inordertomeettheminimumO3monitoring requirements,themonitormustbeclassifiedasastateandlocal air monitoringstations(SLAMS) monitor.Theclassificationof thismonitor inAQSis monitortype"other"and mustbechangedinorderfor the monitortocount towardstheminimummonitoringrequirements.MinimumPMloMonitoring Requirements40CFRPart58,AppendixA3.3.140CFRPart58,AppendixD,TableD-4TheStateofTennessee'scurrentPMloprimary monitoring network meets the minimum requirementsforall areas. AllPMlocollocation requirementsformanualmethodsfoundin 40CFRPart 58, AppendixA3.3.1are currentlybeingmet. FifteenpercentofeachnetworkofmanualPMlomethods (at leastonesite)mustbecollocated.Also,thesiteswithcollocated monitors shouldbeamong those measuringannualmeanconcentrations inthe highest25percentofthe network.Thesecollocation requirementsareassessed atthe primary quality assurance organization(PQAO)level.The State of Tennesseeandallofitslocalagencies operateundera singlePQAO(TDEC)for manualPMlosampling.TheNetworkPlanstatesthatTennesseewillevaluate thepossibility ofdiscontinuing the JacksonPMlosite(AQS47-113-0003)bythe endof2011.Per40CFRPart58,AppendixD,TableD-4,basedonapopulationoflessthan250,000 andlow concentrations,theJacksonMSAisnotcurrently requiredtomonitor forPMlo.EPAisapproving the discontinuationofthismonitor, should Tennessee choosetoshutdownthe site.OnJuly12,2011,EPA receiveda request from Knox CountytodiscontinuePMlomonitoringattheDavannaStreetsite(AQS 47-093-101 3) andreceive a waiverforallPMlomonitoring requirementsof40CFRPart58.AmbientairmonitoringcriteriaforPMloarefoundat40CFRPart 58, Appendix D4.6andTableD-4.This sectionrequiresthat, ataminimum,there mustbeone-twoPMloSLAMSlocatedtomeasure a middleorneighborhood scale inlowconcentrationareaswith populationsof500,000to1,000,000.EPAhasreviewed thisinformationandis disapprovingKnoxCounty's requesttodiscontinuePMlomonitoringatthis sitebecausethe site isneeded tomeet the minimum monitoringrequirements describedabove.Wesuggestthat KnoxCounty replaceitsmanualPMlosampler with acontinuoussampler, whichwouldallowthemtodiscontinue collocationatthis siteandconserveresources. Note that theTennesseePQAOisrequired to meetPMlocollocation requirements as a whole,asdescribed above.MinimumPMzesMonitoring Requirements40CFRPart58,AppendixA3.2.540CFRPart58,AppendixD,TableD-5TheStateof Tennessee'scurrentPM2.5monitoring network meets the minimum requirementsfoundin40CFRPart 58, AppendixD,TableD-5forallMSAs.Also, allmanualPM2.5collocation requirementsfoundin 40CFR Part 58,Appendix A3.2.5arecurrentlybeing met.Fifteenpercentofeach networkofmanualPM2.5methods(at leastonesite)mustbecollocated. Additionally, accordingto AppendixA3.2.5.3,80percentofcollocated monitors shouldbedeployedatsiteswithannualmeanconcentrationswithin+I-20percentof theNAAQS.ThePM2.5monitoringnetworkdescribed inthe2011Network Planmeets allof thedesigncriteria of40CFRPart58.PMz.5Continuous MonitoringRequirements40CFRPart 58, AppendixD4.7.2Regulatory requirements for continuousPM2.5monitoringrequirethat "TheState,orwhere appropriate,local agencies must operate continuousPM2.5analyzersequalto atleastone-half(round up) theminimum requiredsiteslisted inTableD-5of thisappendix. Atleast onerequiredcontinuous analyzerineachMSAmust becollocatedwithone oftherequiredFRMJFEWARM[federalreferencemethodlfederalequivalentmethodlapprovedregional method]monitors, unlessatleastone oftherequiredFRM/FEM/ARMmonitorsisitself a continuousFEMorARMmonitorinwhichcasenocollocation requirementapplies."TheseminimumcontinuousPM2.5monitoringrequirementsarecurrentlymetinalloftheMSAsin theState.Also,the continuousPM2.5collocation requirementsarecurrently met in allMSAs.Therefore, the continuousPM2.5monitoringnetworkdescribedinthe 201 1NetworkPlan meets allofthe design criteriaof40CFRPart58.PM2.5Backgroundand Transport Sites40CFRPart 58, AppendixD4.7.340CFRPart58,Appendix D4.7.3requiresthat"eachStateshall installandoperateatleast onePM2.5sitetomonitor forregional background and atleast onePM2.5site tomonitorfor regionaltransport."The2011Network PlanidentifiessitesinBlount County(AQS47-009-0101) andHamiltonCounty(AQS47-065-0031,47-065-1011)asregionaltransportsites,andsites inBlount County (AQS47-009-0101)andSullivan County(AQS47-163-3003,47-163-1007)asregionalbackgroundsites,aswellasseveral otherslocatedinnon-MSNcorebasedstatisticalarea (CBSA) areas.Therefore, TDEC hassatisfiedtherequirementsof40CFRPart58for background andtransport sites.Pb MonitoringRequirements40CFRPart58,AppendixD4.5EPArecentlyrevisedthemonitoringrequirementsfor leadfoundat40CFRPart58,Appendix DSection4.5(see75Federal~egister81126).Theserevisions reducedthe emissions threshold forfacilities nearwhichsource-orientedPbmonitoringisrequiredfrom1.0tonsperyear(tpy)to.0.5tpy.Therule alsoremovedpopulationbasedmonitoring requirementsforPb,and replacedthemwitharequirement tomonitorforPbat urbanNCoresites.40CFRPart58, AppendixD4.5requiresthat"Ataminimum,there mustbe onesource-orientedSLAMS[Stateand LocalAirMonitoring Station] sitelocated to measurethemaximumPbconcentrationinambientair resultingfromeachnon-airportPbsourcewhichemits 0.50ormoretonsperyear andfromeach airportwhichemits1.0ormore tonsperyear..."Currently, thereisexistingmonitoringrequiredneartwosourcesinTennessee:Exide Technologies inBristol and GerdauAmeristeel inKnoxville.TheStateofTennesseehasrequestedthatEPAconsider revisedemissions data relatedtosourceorientedPbmonitoring requirements.Tennesseehassubmittedinformation indicatingthatthe actual Pbemissions fromthefollowing sources arebelow0.50tpy:GerdauAmeristeel, Jackson,TNDensoManufacturing Tennessee,Inc.,Maryville,TNMaggoteaux Pulaski,Pulaski,TNEPAhasreviewedthisinformation,andconcurs that the actualPbemissionsfromthese sourcesarebelow0.50tpy.Therefore, ambientairmonitoringisnot requiredatthese sources. Tennesseeiscurrently meetingtheminimumPbmonitoring requirementsof40CFRPart58.SO2Monitoring Requirements40CFRPart 58,AppendixD4.4Ambientairmonitoring network designcriteriaforSO2arefoundinsection4.4ofAppendixDto40CFRPart 58.This sectionrequires that"Thepopulation weighted emissions index(PWEI) shallbecalculatedby States foreachcorebased statisticalarea(CBSA)..."Asa result, theSO2monitoringsite(s)required in eachCBSAwillsatisfyminimummonitoring requirements ifthemonitor(s)is sitedwithin theboundariesof theparent CBSA andisofthe followingsitetypes:populationexposure,maximumconcentration, source-oriented, general background,orregional transport. ASO2monitorataNationalCore(NCore)stationmaysatisfyminimummonitoring requirements ifthatmonitorislocatedwithinaCBSAwith minimally required monitors consistent with Appendix D4.4.TennesseehasrequestedtousetheLookRock NCore monitoringsite'sSO2monitorto meetthePWEIrequirementof oneSO2monitor for the Knoxville CBSA.However,because this site isnot urbaninnatureandbecause only oneSO2monitorisrequiredin theKnoxvilleCBSA,EPArecommendsthatTennessee establish a population exposureormaximumconcentrationsite inordertosatisfytheminimumSO2monitoring requirementsfor thisarea.TennesseeisrequiredtooperateoneSO2monitorin theKingsport CBSA.Currently, thereisasourceorientedSO2monitor operatedbythe TennesseeEastrnanfacilityattheRossN.RobinsonSchool.Tennesseehasrequested permissiontousethis monitortosatisfy the minimumSO2monitoringrequirements fortheKingsportCBSA. Region4isin consultationwiththe OfficeofAirQualityPlanning andStandards (OAQPS) regardingtherequestand willprovide a responsewhenit becomesavailable.Air Quality. Index(AQI)Reporting40CFR558.50AQIreportingisrequiredforMSAswithpopulationsof350,000ormore accordingtotheJuly1,2000U.S.Census.TherearefourMSAsintheState ofTennesseethat meetthiscriterion: Chattanooga,Tennessee-Georgia;Knoxville,Tennessee;Memphis,Tennessee-Mississippi-Arkansas;andNashvilleDavidson-Murfkeesboro,Tennessee.TheNetworkPlan indicatesthat AQIreportingisoccurringin eachoftheseMSAs.Currently,TDECisalso voluntarily providingAQIreportingfor the Kingsport-JohnsonCity-Bristol, Bristol,~ehessee-~irginiacombinedstatisticalaiea,andtheClarksville-MontgomeryCountycombinedstatisticalarea.TheState'sactionssatisfytheAQIreporting requirements.NCore Monitoring NetworkTDEC hasdesignatedtwoNCoresites inthe2011Network Plan.The firstsite(AQS47-157-0075)islocatedatShelbyFarms onHaleyRoad inMemphis.EPAapprovalwasgrantedonOctober30,2009.All qualityassuranceproceduresshallbeimplementedinaccordancewith40CFRPart58, AppendixA.MemphisShelby County's qualityassuranceprojectplanwassubmittedtoEPAonJune29,2010, witha subsequent revisionsubmitted onJuly30,2010.TheLook RockNCoresite(AQS47-009-0101)isdesignatedasaruralsitelocatedathigh altitudeinGreatSmoky Mountain National Park andisbeing operated as a collaborative effortbetweentheNational ParkService(NPS),theTennesseeValley Authority(TVA), TDEC andEPA.Thismonitoringsite hasbeenin operation for anumberofyearsandiscurrently collecting severalcompounds.Since theLookRockNCoresiteisnotpartof theofficialnationalNCorenetwork,theparametersmonitoredandoperatioaalproceduresdo notneed toadheredirectlytothose specifiedin40CFR Part58.Thefunctionality,parameters tobemonitored,andoperational guidelinesoftheLookRocksitewillbebasedon thedataneedsofNPS,TVA, TDEC,EPARegion4 andOAQPS.Thesecollaboratorsareexpectedtoworktogether todefineandprovidetheoperational resources neededand to determinehowlong thesitewill operate.Memoranda ofAgreement(MOA)withNeighboring StatesFinally, Tennesseeand Kentuckyhave a monitoringmemorandum of agreement(MOA)withregardtoO3andcontinuousPM2.5monitoring.Inaddition,Tennessee,ArkansasandMississippihaveaMOAregarding monitoringofPMlo,PMz.5and03.Previous correspondencebetweenTDECandEPAindicatedthatthe Statewouldpursue aMOAwith theCommonwealthofVirginia governing themonitoring responsibilitiesintheBristol,Tennessee/Bristol,Viidniaarea.Ifandwhenit enters into aMOAwiththeCommonwealth,TDEC should update itsNetwork Plan toreflectthat change.