From:AmirikianRonaldA.(DNREC)Sent:Friday,August15,200812:34PMTo:‘tim_allen@fws.gov’Cc:SippleJohnL.(DNREC);MirzakhaliliAu(DNREC)Subject:Delaware’sVisibilitySIP-BARTAttachments:DelawareproposedVisibilitySIP.docMr.TimAllen:IsentyouacopyofDelaware’sdraftVisibilitySIPonApril29,2008.Thankyouforyourcommentsandsuggestions—Ithinktheyhelpeduscreateabetterandclearerproposal.AttachedforyourinformationisDelaware’sproposedVisibilitySIP.ThemainchangefromthepriordraftisintheBARTSection,Section8.InourlastdraftyoumayrecallthatDelawarereliedupontheEPAdemonstrationthat“CAIRisbetterthanBART”forSO2andNOx.Asyouknow,CAIRwasvacated.BecauseofthiswehaverevisedtheBARTportionofourSIPrelativetoS02andNOX.CAIRwasprojectedtogetnoreductionsinDelaware(actually,DEEGUemissionswereprojectedtoincreaseunderCAIR).ThiswasoneofthereasonsDelawareadoptedRegulationNo.1146.RegulationNo.1146imposesstringentNOXandS02(andmercury)requirementsonDelaware’scoalandresidualoilfiredEGUs.ItrequiresactualreductionsfromDelaware’sEGUs,whileCAIRdidnot.GiventhatwehadadoptedRegulationNo.1146thereviseddemonstrationinSection8isrelativelystraightforward,andunliketheversionyoureviewedthatwasbasedonCAIRourSIPnowshowsthatDelawarewillachievesignificantreductionsatallourBARTeligiblesources.Thedemonstrationshowsthat“Reg.1146isbetterthanBART”usingavarietyofdemonstrations,includingonebasedonthemethodologyin40CFRPart51305(e)—“alternativemeasures.”40CFRPart51.308(e)providesthatastatemay“demonstratesthatanemissionstradingprogramorotheralternativewillachievegreaterreasonableprogresstowardnaturalvisibilityconditions.”UnderthisprovisionwehavedoneasimilaranalysisastheEPAdidforCAIR;ananalysisthatshowsthatouralternativeprogram(i.e.,DelawareRegulationNo.1146)isbetterthanBART.AsignificantdifferencebetweenourdemonstrationandtheEPACAIRdemonstrationisthatCAIRwasatradingprogram,whileReg.1146isnot.Reg.1146coversallBART-eligiblesourcesinDelaware,andrequireseachofthoseunitstomeetstringentNOXandS02emissionrequirements.Itisclearlymorestringentthanaunit-by-unitBARTanalysis(andobviouslyCAWthatwasusedinouroriginaldraft).EvenwiththeabsurdassumptionthatallDelawareBART-eligibleunitswouldemitzeroemissionsunderaunitby-unitBARTanalysis,Reg.1146getsmorereductions.Inaddition,sinceReg.1146doesnotallowtrading,unlikeCAIR,thedistributionofthereductionsisnodifferentunderouralternativeprogram(i.e.,Reg.1146)thenitwouldbeunderaunit-by-unitBARTanalysis.Webelievethatyouwillagreethatthisisaverypositivechange,sincethischangedemonstratesthatDelaware’sunitswillreduceemissionsunderour“Reg.1146isbetterthanBARTanalysis,”ratherthanincreaseaswasthecaseundertheprior“CAIRisbetterthanBARTanalysis.”WebelievethatunlikemanystatesDelaware’splanwasnotreliantonCAIRandDelawarehasdonewhatisneededtoreduceemissionsfromEGUs.BecauseofthisDelawareEGUs,toincludealloftheEGUsthatwereBART-eligible,willnotcontinuetocausevisibilityproblemsatClassIareaseveninlightofEPA’sfailurewithCAIR.Wearebeginninga30-daypubliccommentperiodonourSIPthisSunday,August17,2008,andplanonholdingapubichearingonSeptember23rdPleasereviewtheattachedrevisedBARTsectionofourSIP,andJackSippleandIwouldbeg’adtodiscussitwithyouatyourconvenience.Thankyouforyourhelp.RonaldA.AmirikianPlanningBranchManagerStateofDelawareDNRECAirQualityManagement(302)739-9402