ÿWPCd  ~Ýg¨~¥Îì?,ÖêlÞ³u#º Y6þ§éuW»%Ä™ewÒ:¸,š“@Yd \([K­t)~Î͈ü BJ¨-‹Ûuôi±B ä6bÓg{›ÉÑ$ð\¸µGE(”Ëx‘!ÛêŠb—~\±"xæ­>â¬ÇçÍ…¹‰d]?-ÉêMØô¥éYÁó1Ø#ôND³r8¿屦UÚÙR1θ'hãV¿dŒfî¢'Î#J¾ÆÍ;îxG³°T’5…{¥a76úâÈ~ç¿W@ù4Á"‰y•Hÿ{%„âAaC_ãºÜËWèÖ78·ŸŒŒ‹áof¦ØÂ“Hˆ°j,ÎD&ëm¹<êhSªöZן'b‰Ü”Ô Cß• ²¬·pƒ13Ô:ƒˆÝô^ç&ò¢ØÒƒÆ&çÔ®@Vëðé£nç±ÒV2zö‡óKÚ÷f9|y)¢¯¡Ùhä¹ÚnäÙæ@M¦ž¾él Ñò5{n8¬_µÊ Ó¸;&]ÞÈÊ @vÃJç I¤f>«¢¦;fVN^P¶hÀðgkRŸú;×ø³)uÕ5È&«r˜°¥Š|Pî‘Í*&ÜVþ¨x[Õ¶S(¦@ëÒcJ[@‡Î«G#!âUN %Q 0(Ww@4¿ÓâNø´ú^ ® º m¼ UNÓ Ó Ó ;! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! \ ˜Acrobat PDFWriter 3.0Ø,,,,,Ø,0(ÈhH  Z 6Times New Roman RegularX($¡¡ $%E&'E()¿*e+,e-/ln=$3|x- Ù  Ù  CAAAalkylatedpolycyclic&hexachlorobenzene"polychlorinatedbiphenyls4tetrachlorodibenzofurans(tetrachlorodibenzotoxics HCB MACTcommentercommentersenginedonroaddioxinsfuransbiphenylcombustors MWCs HAPs&tetrachloroethane"dichlorobenzeneacrolein MWC TEQng RCRAfuranFestusLebec PCBs EPRIpolynuclear PAHRulemaking ICCROAQPS OSWcombustori]nclude PAHs TCDD TEQs TCDF3•ˆ$áÿU‹ÿÀÀÀ(ÖÃ9 Z‹6Times New Roman Regular 1ØØÑ#€XØXÿÿd#ÑÝ ƒ!ÝÝ  ÝÔ_Ôñ)ñÔ‡XHXXXÔñ)ñò òÓ  ÓÑ€´ûÑÑ  ÑÌÌÔ‡¼±S»XXHÔSummary€of€Public€Comments€on€the€Section€112(c)(6)Ð ˆØ ÐDraft€Listing€NoticeÔ#†XHX»¼±S‚#Ôó óÐ œì ÐÓ  ÓÌÌÓ  ÓÌÌÌEPA€Docket€No.€A„97„05ÌÌÌÌÌÌÌPrepared€by:ÌÌVisibility€and€Ecosystem€Protection€GroupÌMail€Drop€15ÌAir€Quality€Strategies€and€Standards€DivisionÌOffice€of€Air€Quality€Planning€and€StandardsÌU.S.€Environmental€Protection€AgencyÌResearch€Triangle€Park,€North€Carolina€27711ÌÌandÌÌEmission€Factor€and€Inventory€GroupÌMail€Drop€14ÌEmissions€Monitoring€and€Analysis€DivisionÌOffice€of€Air€Quality€Planning€and€StandardsÌU.S.€Environmental€Protection€AgencyÌResearch€Triangle€Park,€North€Carolina€27711ÌÌÌÌÌÌÌÌÌÌApril€2,€1998ÌÓ  ÓÐ  ¤,ô'+ ÐÙÙÓ  Óò òÑ8€3¸XXdêdÈ8ÑÑ€ÓÑTable€of€Contentsó óÐ ° ÐÌÓ  ÓÌòòSectionóóà€N N C(#àòòPage€No.óóˆÐ tÄ ÐÌ1.0à  àPurpose€of€Documentà‚Ä"Ä"J(#.Ö Ö "à1ˆÐ L œ ÐÌ2.0à  àTechnical€Comments€and€Responsesà‚Ä"Ä"J(#.€€/à3ˆÐ $ t ÐÌ3.0à  àPolicy€Comments€and€Responsesà‚`"`"I(#.hh,à16ˆÐ ü L  ÐÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÐ h+¸&* ÐÑ ´ûÓÑâ âØØÑ8€3¸XXdêXXdê8Ñâ âÙÙâ âÑ  ÑÔ  Ôò òÓ€Ó1.0à  àPURPOSE€OF€DOCUMENTó óÔ KÔÐ ° ÐÌà  àSection112(c)(6)€of€the€Clean€Air€Act€Amendments€(CAAA)€of€1990€prescribes€theÏfollowing€regulatory€program€for€seven€specific€pollutants:ÌÌÓ€Óà8  àWith€respect€to€alkylated€lead€compounds,€polycyclic€organic€matter,Ïhexachlorobenzene,€mercury,€polychlorinated€biphenyls,Ï2,3,7,8-tetrachlorodibenzofurans€and€2,3,7,8-tetrachlorodibenzo-p-dioxin,€theÏAdministrator€shall,€not€later€than€5years€after€the€date€of€enactment€of€the€CleanÏAir€Act€Amendments€of€1990,€list€categories€and€subcategories€of€sourcesÏassuring€that€sources€accounting€for€not€less€than€90percent€of€the€aggregateÏemissions€of€each€such€pollutant€are€subject€to€standards€under€Subsection(d)(2)Ïor€(d)(4).€€Such€standards€shall€be€promulgated€not€later€than€10years€after€suchÏdate€of€enactment.€€This€paragraph€shall€not€be€construed€to€require€theÏAdministrator€to€promulgate€standards€for€such€pollutants€emitted€by€electricÏutility€steam€generating€units."Ð Ð Ð  ÐÌÌÓ€Óà  àIn€order€to€meet€the€requirements€of€Section112(c)(6),€national€inventories€of€sourcesÏand€emissions€of€these€seven€specific€pollutants€were€compiled€by€the€U.S.€EnvironmentalÏProtection€Agency€(EPA).€€These€inventories€provide€the€reference€basis€for€the€development€ofÏa€national€strategy€to€control€the€112(c)(6)€pollutants€to€the€extent€specified€in€the€statute.ÌÌà  àThe€EPA€published€a€draft€listing€of€source€categories€accounting€for€theÏsection112(c)(6)€hazardous€air€pollutant€(HAP)€emissions€and€the€source€categories€needed€toÏmeet€the€90€percent€requirement€in€the€òòFederal€Registeróó€on€June€20,€1997€(62€òòFRóó€33625).€€TheÐ D!”% Ðnotice€and€the€base€year€inventory€document€contain€detailed€information€about€emissionsÏinventory€development€methodology€and€its€review€process.€€The€EPA€posted€the€notice,€theÏ1990€base€year€inventory,€and€an€explanatory€fact€sheet€on€the€EPAððs€Internet€web€siteÏ(www.epa.gov/ttn/uatw/112c6fac.html).€€The€EPA€also€notified€trade€associations,Ïenvironmental€groups,€regulatory€agencies,€and€other€parties€who€had€expressed€interest€orÏsupplied€data€to€alert€them€of€the€availability€of€the€section112(c)(6)€package.€€The€EPAÏaccepted€comments€on€the€draft€listing€and€base€year€inventory€over€a€30„day€comment€period.€Ð ò*B&3 ÐA€total€of€27separate€comment€letters€were€received€regarding€the€July€20,€1997€òòFederalÐ ° ÐRegisteróó€package.€€Several€of€the€comments€pertained€to€the€accompanying€1990€base€yearÐ b Ðemissions€inventory€supporting€the€section112(c)(6)€listing€process.€€Within€the€27individualÏcomment€letters,€approximately€50separate€comment€issues€were€identified.€€These€commentsÏpertained€to€both€technical€and€policy€issues.€€This€document€was€prepared€to€provide€a€summaryÏof€the€comments€received,€the€issues€raised,€and€EPAððs€responses€to€the€comments.€€SimilarlyÏfocused€comments€have€been€aggregated€and€summarized€in€this€document,€along€with€the€EPAÏresponses€to€the€comments.€€The€responses€indicate€how€a€technical€or€policy€issue€is€beingÏaddressed€in€the€final€òòFederal€Registeróó€listing€notice€for€section112(c)(6)€or€in€the€finalÐ À  Ðsupporting€emissions€inventory.€€The€comment€summary/response€document€can€be€found€in€theÏdocket€for€the€section112(c)(6)€project€and€on€the€EPA€air€toxics€web€pageÏ(http://www.epa.gov/ttn/uatw/112c6fac.html).€€ÌÌà  àThe€remainder€of€this€document€is€organized€into€two€sections,€one€section€addressingÏtechnical€comments€received€on€the€112(c)(6)€draft€notice€and€inventory,€and€another€addressingÏpolicy€comments€on€112(c)(6).€€Within€each€section,€similar€comments€are€identified€and€EPAððsÏresponse€to€the€comment€is€explained€along€with€an€indication€of€how€the€response€affected€theÏfinal€112(c)(6)€inventory€report€or€final€listing€notice.€€ÌÌÌÌÌÌÌÌÌÌÌÐ h+¸&8 Ð‡Ô  Ôò ò2.0à  àTECHNICAL€COMMENTS€AND€RESPONSESó óÔ ÔÐ ° ÐÌà  àThe€majority€of€the€technical€comments€regarded€items€relating€to€some€aspect€of€anÏemissions€inventory€estimate€for€a€source€category.€€Most€of€these€comments€questioned€the€useÏof€a€particular€emission€rate€or€factor€or€the€use€of€an€activity€rate€for€a€source€category.€€TheÏEPA€evaluated€the€technical€data€submitted€and€revised€several€emissions€estimates€based€onÏthese€comments.€€The€most€substantive€of€these€comments€and€EPA€responses€to€them€areÏsummarized€below.ÌÌà  àò òComment:€€ó óThe€level€of€hexachlorobenzene€(HCB)€contamination€in€chlorinated€solventÐ "r  Ðproducts€is€far€below€what€EPA€used€to€calculate€its€national€emissions€estimate.€€The€dataÏindustry€proposes€for€the€contamination€level€would€greatly€lower€emissions€attributable€toÏchlorinated€solvents€production€sources.Ìà  àò òResponse:€€ó óThe€process€used€by€EPA€in€developing€1990€base€year€HCB€emissions€forÐ ° Ðthe€chlorinated€solvents€category€relied€on€the€use€of€industry„reported€emission€estimates€fromÏthe€1990€Toxic€Release€Inventory€(TRI)€system.€€EPA€believes€that€the€use€of€theÏindustry-reported€data€is€the€best€approach€for€112(c)(6)€inventory€purposes.€€None€of€theÏinformation€provided€in€the€comment€were€deemed€to€be€of€any€greater€quality€or€confidence€forÏ1990€that€would€warrant€not€using€the€1990€TRI€data.€€Also,€it€was€unclear€if€the€alternative€dataÏoffered€in€the€comment€were€for€1990€conditions.ÌÌà  àò òComment:€€ó óBy€not€including€hexachlorobenzene€emissions€from€pesticides€application€inÐ Æ!* Ðthe€emission€tables€in€the€112(c)(6)€òòFederal€Registeróó€notice,€EPA€is€inappropriately€makingÐ .#~, Ðchlorinated€solvents€production€look€like€the€major€category€of€HCB€emissions€when€it€is€not.Ìà  àò òResponse:€€ó óPesticides€application€is€not€a€stationary€source€of€HCB€emissions;€and€isÐ ò%B!0 Ðtherefore,€not€included€in€the€112(c)(6)€regulatory€strategy€analysis.€€EPA€does€not€believeÏpesticides€application€should€be€a€part€of€the€analysis€since€it€is€not€a€source€category€that€wouldÏâ âbe€regulated€by€maximum€achievable€control€technology€(MACT)€standards.€€Additionally,€inÐ *n%6 Ðthe€final€112(c)(6)€inventory,€additional€categories€have€been€included€such€that€chlorinatedÏsolvents€production€is€not€the€highest€emissions€category.Ìâ âÌò òà  àComment:€€ó óA€commenter€asserted€that€there€were€inconsistencies€between€data€ñ&ñrelated€toÐ Ö& Ðgasñ&ññ'ññ&ñtñ&ññ'ññ(ñoline€distribution€ñ(ñin€Table8„2€of€the€112(c)(6)€inventory€and€Table1€of€the€òòFederal€RegisteróóÐ > Ž Ðnoticeñ%ññ$ñ€ñ$ññ%ñ.Ìà  àò òResponse:€€ó óFor€the€purposes€of€EPA's€112(c)(6)€emission€inventory€process,€gasolineÐ  R  Ðdistribution€stage€I€includes€all€emissions€associated€with€the€distribution€of€gasoline€up€toÏrefilling€underground€storage€tanks€at€service€stations.€€StageII€emissions€occur€at€the€serviceÏstation€pump.€€The€emissions€were€apportioned€to€stageI€and€stageII€operations€such€that€aÏportion€of€the€emissions€associated€with€€service€stations€were€assigned€to€both€operations.€€TheÏuse€of€this€approach€provides€a€more€accurate€estimate€of€emissions€than€allocating€all€serviceÏstation€emissions€to€stageII€as€proposed€by€the€commenter.€€The€approach€used€in€the€inventoryÏis€consistent€with€the€way€EPA€has€developed€the€gasoline€distribution€stageI€MACT€and€stageÏII€control€programs€at€the€pump.ÌÌò òà  àComment:€€ó óSeveral€commenters€suggested€that€the€EPA€reconsider€listing€"GasolineÐ Ü,  ÐDistribution€(Aviation)"€as€a€source€category€€for€alkylated€lead€under€section112(c)(6)€based€onÏthe€following€arguments:€€1)€The€EPA€incorrectly€characterized€the€contribution€of€€"GasolineÏDistribution€(Aviation)"€to€the€total€1990€€alkylated€lead€emissions.€€Given€that€GasolineÏDistribution€(StagesI€and€II)€€emissions€were€largely€uncontrolled€in€1990,€their€contribution€to€Ïtotal€alkylated€lead€emissions€€may€be€underestimated.€€2)€Alkylated€lead€emissions€fromÏ"Gasoline€Distribution€(Aviation)"€constitutes€a€near€negligible€source€and€exposure€to€the€publicÏis€very€low.Ìà  àò òResponse:€€ó óNo€new€or€alternative€1990€national€emission€estimate€for€alkylated€lead€fromÐ ò%B!0 Ðaviation€gasoline€distribution€was€provided€by€the€commenters.€€No€data€were€provided€by€theÏcommenters€that€would€change€the€emission€estimate€for€aviation€gasoline€distribution.€€EPA,Ïtherefore,€has€no€basis€on€which€to€change€the€existing€1990€national€emissions€estimate€and€hasÏnot€done€so.€€Furthermore,€EPA€does€not€agree€with€the€commenters€that€1990€emissions€fromÐ €+Ð&8 Ðstage€I€gasoline€distribution€were€"largely€uncontrolled,"€and€thus€misrepresent€the€contributionÏof€the€category€to€total€national€alkylated€lead€emissions.€€In€regards€to€the€comment€thatÏ"exposure€to€the€public€is€low,"€the€inventory€only€provides€estimates€of€emissions€„€publicÏexposure€to€emissions€was€not€in€any€way€considered€in€this€study.ÌÌò òà  àComment:€€ó óOne€commenter€indicated€that€the€112(c)(6)€estimates€for€"GasolineÐ š ê  ÐDistribution€(Aviation)"€do€not€include€the€use€of€highly€leaded€aviation€fuel.Ìà  àò òResponse:€€ó óThe€EPA€assessment€and€inventory€report€for€112(c)(6)€alkylated€leadÐ d´  Ðemissions€did€recognize€the€availability€of€high„lead€aviation€gasoline.€The€inventory€reportÏnotes€that€high„lead€formulations€was€used€to€develop€conservative€estimates€of€tetraethyl€leadÏ(TEL)€evaporative€emissions€from€aviation€gasoline.ÌÌò òà  àComment:€€ó óA€commenter€sought€a€clarification€of€the€"Gasoline€Distribution€(Aviation)"Ð T¤ Ðsource€category€listing€for€two€reasons:€1)€to€assure€the€exclusion€of€commercial€jet€fuel€in€theÏlisting,€and€2)€to€clarify€which€aviation€industries€may€be€subject€to€regulations€by€the€rule.€€TheÏcommenter€specifically€requested€that€the€term€"aviation€fuel"€be€defined€for€the€purposes€ofÏsection112(c)(6).Ìà  àò òResponse:€€ó óFor€the€purposes€of€the€112(c)(6)€emissions€inventory€analysis,€the€sourceÐ D”" Ðcategory€of€gasoline€distribution€(aviation)€did€not€and€does€not€include€commercial€jet€fuels.€ÏOnly€aviation€gasoline€used€in€reciprocating€piston„engined€aircraft€were€included€in€the€Ìinventory€evaluation€and€estimate.€€It€is€not€possible€to€address€the€second€part€of€theÏcommenter's€request€that€the€aviation€industries€potentially€subject€to€regulations€be€listed.€€TheÏ112(c)(6)€process€only€identifies€source€categories€that€are€candidates€for€listing€for€standardsÏdevelopment€under€Clean€Air€Act€section112(d).€€The€specific€"industries"€that€end€up€beingÏpart€of€the€regulated€community€will€not€be€determined€until€such€time€that€the€full€112(d)Ïstandards€development€process€commences€and€reaches€this€position.€€The€112(c)(6)€inventoryÏprocess€only€provides€emission€estimates€and€does€not€indicate€any€regulatory€plan€orÏrequirement.ÌÐ €+Ð&8 ЇÌò òà  àComment:€€ó óThe€112(c)(6)€1990€baseline€emissions€inventory€incorrectly€includesÐ b Ðalkylated€lead€emissions€from€lead€in€motor€vehicles€gasoline€that€has€been€phased€out.Ìà  àò òResponse:ó ó€€The€base€year€for€the€112(c)(6)€inventory€was€1990.€€Leaded€fuel€for€onroadÐ Ü, Ðvehicles€was€not€fully€banned€until€December31,€1995€(see€section211(n))€.€€According€to€U.S.ÏEPA€evaluations,€in€1990,€4.8percent€of€highway€vehicle€fuel€sold€was€leaded,€with€there€beingÏa€particularly€strong€market€for€leaded€fuel€in€the€Pacific€Northwest.€€EPA,€therefore,€believes€itÏwould€be€incorrect€to€calculate€1990€base€year€emissions€with€the€assumption€that€all€highwayÏvehicle€fuels€being€consumed€in€1990€were€lead„free.ÌÌò òà  àComment:€€ó óA€commenter€indicated€that€it€is€important€to€evaluate€both€gas€andÐ à  Ðparticulate„phase€components€of€polycyclic€organic€matter€(POM)€and€dioxins/furans€emissionsÏfor€the€purpose€of€the€112(c)(6)€inventory.Ìà  àò òResponse:ó ó€€In€the€evaluation€of€available€test€data€for€construction€of€the€inventory,€bothÐ ¼  Ðgas€and€particulate„phase€components€of€POM€and€dioxins/furans€were€considered€to€the€extentÏthat€the€source€test€information€allowed.€€If€both€phases€of€the€emissions€were€analyzed€Ìin€the€tests,€the€factors€developed€for€inventory€purposes€included€both€components.ÌÌò òà  àComment:€€ó óThe€number€of€iron€and€steel€foundries€was€questioned€and€an€alternateÐ ¬ü$ Ðnumber€was€provided.Ìà  àò òResponse:€€ó óThe€final€112(c)(6)€inventory€report€was€modified€to€reflect€the€sourceÐ v Æ( Ðinformation€specified€by€the€commenter.ÌÌà  àò òComment:ó ó€€The€dioxins/furans€emission€estimate€for€iron€and€steel€is€poor€because€it€isÐ ¢$ò. Ðbased€on€samples€obtained€from€a€single€facility.€€No€other€dioxins/furans€data€were€provided€byÏthe€commenter.Ìà  àò òResponse:€€ó óThe€final€112(c)(6)€inventory€emission€estimate€is€based€on€the€bestÐ Î($4 Ðinformation€EPA€could€determine.€€EPA€agrees€with€the€commenter€that€it€would€be€much€betterÏto€have€more€data€from€multiple€facilities,€but€these€data€were€not€available.€€The€draft€dioxinÐ ˜+è&8 Ðestimate,€however,€has€been€significantly€reduced€in€the€final€inventory€to€reflect€the€downwardÏshift€in€the€source€category's€activity€rate.€€The€change€in€activity€rate€was€also€prompted€by€anÏexternal€review€comment.ÌÌà  àò òComment:€€ó óThe€activity€level€for€iron€and€steel€foundries€was€questioned€and€an€alternateÐ 8 ˆ Ðactivity€level€was€provided.Ìà  àò òResponse:€€ó óThe€revised€activity€level€for€the€source€category€suggested€by€the€commenterÐ  R  Ðwas€incorporated€into€the€emission€estimate€calculations€€for€the€final€inventory.ÌÌà  àò òComment:€€ó óThe€POM€emission€factor€for€iron€and€steel€foundries€was€questioned.€€TheÐ .~  Ðcommenter€states€that€non„representative€emissions€data€from€bench„scale€measurements€wereÏused€to€derive€a€composite€emission€factor€for€use€in€calculating€a€national€estimate.€€Not€usingÏthe€questioned€data€reduces€emissions€by€several€orders€of€magnitude.Ìà  àò òResponse:ó ó€€EPA€evaluated€the€comment€and€decided€to€delete€the€data€in€question€fromÐ ¼  Ðthe€POM€emission€factor€analysis.€€A€revised€POM€emission€factor€was€developed€which€isÏsignificantly€lower€than€that€used€in€the€draft€inventory€analysis.€€The€lower€emission€factorÏcombined€€with€a€large€reduction€in€the€source€category€activity€level€resulted€in€nationalÏemissions€for€the€category€dropping€by€more€than€an€order€of€magnitude€in€the€final€inventory.ÌÌà  àò òComment:€€ó óThe€approach€used€to€estimate€polychlorinated€biphenyl€(PCB)€emissionsÐ ^& Ðfrom€municipal€waste€combustors€(MWCs)€was€questioned€as€being€"highly€speculative€andÏinappropriate."€€The€commenter€indicated€that€it€is€inappropriate€to€use€three€emission€tests€toÏderive€factors€which€in€turn€are€used€to€estimate€national€emissions.Ìà  àò òResponse:€€ó óEPA€agrees€with€the€commenter€that€it€would€be€advantageous€to€have€moreÐ œ$ì. Ðdata€points€on€which€to€base€the€estimate;€however,€no€alternative€data€or€approaches€forÏestimating€emissions€were€provided€by€the€commenter,€such€that€this€estimate€could€not€beÏimproved€upon.€€No€additional€PCB€emissions€data€were€identified€during€the€external€inventoryÏreview€process.ÌÐ Œ+Ü&8 Їà  àò òComment:ó ó€€A€commenter€provided€some€very€general€information€on€her€beliefsÐ ° Ðregarding€the€possible€emission€of€some€20€HAPs€from€MWCs.€€For€each€HAP,€the€commenterÏidentified€whether€or€not€the€HAP€was€emitted€from€MWCs,€whether€or€not€they€had€any€testÏdata€for€this€HAP,€and€where€data€were€available.€€A€summary€listing€of€results€was€provided.€€ÏPollutants€for€which€the€commenter€said€MWCs€were€not€a€source€and€for€which€they€knew€ofÏno€test€data€results€are:€€1,1,2,2-tetrachloroethane,€1,3-butadiene,€1,4-dichlorobenzene,€acrolein,Ïmethyl€chloride,€and€chloroform.€€€HAPs€indicated€as€being€possible€MWC€pollutants€and€forÏwhich€test€data€were€or€soon€will€be€available€included€acetaldehyde,€benzene,€POM,€arsenicÏcompounds,€cadmium€compounds,€carbon€tetrachloride,€chromium€compounds,€dioxins/furans,Ïformaldehyde,€lead€compounds,€manganese€compounds,€mercury€compounds,€and€nickelÏcompounds.Ìà  àò òResponse:€€ó óThe€overall€comment€was€made€in€response€to€an€EPA€request€forÐ ì< Ðinformation€for€its€section112(k)€HAP€inventory.€€Most€of€the€pollutants€commented€on€areÏ112(k)€pollutants.€€While€providing€some€useful€insights€into€the€future€availability€of€possibleÏHAP€emission€data€for€MWCs,€the€comment€did€not€provide€a€significant€amount€of€informationÏthat€was€directly€usable€to€revise€the€final€112(c)(6)€inventory.ÌÌà  àò òComment:€€ó óA€commenter€stated€that€the€annual€volume€of€scrap€tires€burned€and,Ð >Ž" Ðtherefore,€the€emission€estimates€for€POM€surrogates€are€overstated.€However,€the€commenterÏdoes€not€have€a€more€reliable€estimate€for€volume€of€scrap€tires€burned.Ìà  àò òResponse:€€ó óEPA€agrees€with€the€commenter€that€the€available€data€on€which€to€base€anÐ j º( Ðannual€activity€figure€for€this€source€category€are€poor.€€As€a€part€of€the€comment€period,€EPAÏre„evaluated€the€available€activity€information€and€determined€that€between€5€and€10million€tiresÏare€open€burned€annually.€€The€mid„point€of€this€range€(7.5million€tires)€was€used€to€re„calculateÏnational€POM€emissions€from€scrap€tire€open€burning.€€This€new€activity€data€was€applied€to€theÏemission€factors€used€in€the€draft€inventory€€yielding€a€much€lower€final€emission€estimate€forÏthis€source€category.Ô‡ô‡ÇõXXHÔÐ ¼( $4 ÐÔ#†XHXõô‡Ç1M#ÔÌÐ €+Ð&8 Ðà  àò òComment:ó ó€€There€is€a€concern€that€EPA€has€included€facilities€in€the€hazardousÐ ° Ðwaste-burning€kiln€category€that€had€applied€for€interim€incinerator€status,€but€that€had€notÏactually€burned€hazardous€waste€in€1990.€€If€this€was€done,€the€1990€emissions€estimate€for€thisÏgroup€of€sources€would€be€overstated.Ìà  àò òResponse:ó ó€€The€EPA€1990€emissions€estimate€for€this€source€category€is€based€on€theÐ > Ž ÐAgency's€database€of€information€for€facilities€believed€to€actually€have€burned€hazardous€wasteÏas€supplemental€fuel€in€1990.€€The€question€of€whether€or€not€a€facility€had€applied€for€"interimÏincinerator€status"€is€not€relevant€to€the€emissions€issue.€€The€potential€regulatory€classificationÏof€a€source€would€not€have€affected€how€its€HAP€emissions€were€evaluated€for€1990.€€EPA€doesÏnot€see€a€reason€to€adjust€its€112(c)(6)€emission€estimates€as€a€result€of€this€comment.ÌÌà  àò òComment:ó ó€€EPA€has€greatly€overestimated€the€total€amount€of€clinker€produced€by€allÐ òB Ðcement€kilns€in€1990€and€overestimated€the€amount€produced€by€hazardous€waste-burning€kilnsÏin€1990.€€€The€total€amount€produced€has€been€overestimated€by€17percent,€while€the€amountÏfrom€hazardous€waste-fired€kilns€was€overestimated€by€44percent.Ìà  àò òResponse:ó ó€€EPA€re-evaluated€the€national€activity€data€used€for€non„hazardous€andÐ €Ð Ðhazardous€waste€kilns€based€on€its€ongoing€work€in€national€emissions€standards€developmentÏprograms€for€both€source€types.€€EPA€agrees€that€the€activity€data€used€in€the€draft€inventoryÏanalysis€were€overstated.€€In€the€production€of€the€final€inventory€estimates€for€bothÏnon-hazardous€and€hazardous€waste€kilns,€the€information€provided€by€the€commenter€was€usedÏto€help€re-calculate€national€estimates.€€The€final€inventory€estimates€for€the€source€categoryÏwere€significantly€reduced€for€some€pollutants.ÌÌà  àò òComment:ó ó€€There€is€a€typographical€error€in€AppendixB€of€the€112(c)(6)€emissionsÐ –$æ. Ðinventory€report€in€which€the€activity€data€values€for€non„hazardous€and€hazardous€waste€kilnsÏare€switched€in€the€example€calculations.Ìà  àò òResponse:ó ó€€The€comment€is€correct€regarding€the€error€in€AppendixB.€€This€correctionÐ Â($4 Ðwas€made€to€the€final€112(c)(6)€inventory€report.Ð  **z%6 Ðà  àò òComment:ó ó€€As€a€result€of€using€incorrect€activity€data€and€an€incorrect€emission€factorÐ ° Ðfor€mercury,€mercury€emissions€are€overestimated€in€the€112(c)(6)€inventory€by€20€„€38€percent.€ÏA€commenter€indicated€that€the€mercury€Locating€and€Estimating€(L&E)€document€factor€ofÏ1.3E„04€lb/ton€clinker€factor€should€have€been€used€for€both€non„hazardous€and€hazardous€wasteÏkiln€estimates.€€The€112(c)(6)€estimate€used€a€factor€for€non„hazardous€waste€kilns€of€1.5€E„04Ïlb/ton€clinker.€€No€factor€was€expressed€for€hazardous€waste€kilns€as€this€national€estimate€wasÏprovided€by€EPA's€Office€of€Solid€Waste€database.€€Combining€the€lower€factor€with€the€lowerÏactivity€levels€indicated€by€industry€gives€estimates€€20€„€38€percent€lower€than€the€current€EPAÏestimates€for€1990.Ìà  àò òResponse:ó ó€€Mercury€emissions€for€this€source€category€were€re-calculated€in€the€finalÐ (x  Ðinventory€using€both€a€lower€activity€data€level€and€the€reduced€emission€factor€specified€by€theÏcommenter,€resulting€in€a€lower€national€mercury€emissions€estimate€for€cement€kilns€in€the€finalÏinventory.€€The€lower€mercury€emission€factor€suggested€by€the€commenter€(and€contained€in€theÏmercury€L&E€report)€was€not€available€at€the€time€the€draft€112(c)(6)€inventory€was€compiled.€ÏThe€lower€and€newer€factor€suggested€by€the€commenter€was€deemed€to€be€the€desired€factor€forÏuse€in€the€final€112(c)(6)€inventory€analysis.€€Mercury€emissions€in€the€final€112(c)(6)€inventoryÏare€approximately€21percent€lower€than€those€reported€in€the€draft.ÌÌà  àò òComment:€€ó óThe€dioxin€emission€factor€for€non-hazardous€waste€kilns€that€EPA€used€isÐ  ð$ Ðan€order€of€magnitude€higher€than€that€developed€by€the€cement€industry,€thus€resulting€in€anÏoverestimate€of€€emissions.€€The€EPA€factor€is€1.78E„09€lb/ton€clinker€(expressed€as€toxicÏequivalents€or€TEQ).€€The€industry€factor€based€on€30tests€is€1.02E„10€lb/ton.€€All€values€areÏexpressed€at€7percent€oxygen.Ìà  àò òResponse:ó ó€€EPA€has€examined€the€emissions€data€provided€by€the€commenter€in€theÐ $à. Ðcontext€of€the€MACT€standard€development€project€for€non„hazardous€waste€cement€kilns.€ÏBased€on€these€data€and€other€emissions€information,€EPA€has€revised€its€dioxin€TEQ€emissionÏfactor€€and€emissions€estimate€for€this€source€category,€but€not€to€the€level€suggested€by€theÏcommenter.€€The€new€emission€factor€is€0.20ng/dry€standard€cubic€meter€of€flow,€whichÏtranslates€into€a€factor€of€1.36E„09€lb/ton.€€This€change,€combined€with€a€reduction€in€theÐ €+Ð&8 Ðactivity€level,€lowered€the€final€112(c)(6)€national€dioxin€TEQ€emissions€estimate€for€theÏcategory€by€about€29percent.ÌÌà  àò òComment:ó ó€€For€a€given€pollutant,€EPA€should€use€a€consistent€set€of€units€whenÐ Ö& Ðpresenting€the€emissions€of€various€industry€sectors.€€This€would€make€it€easier€to€compareÏestimates€between€categories.Ìà  àò òResponse:ó ó€€EPA€agrees€with€the€commenter€and€will€revise€the€presentation€of€112(c)(6)Ð  R  Ðdata€to€be€on€a€consistent€units€basis.€€Different€units€were€used€previously€for€clarity€in€casesÏwhere€emissions€for€a€pollutant/category€were€very€small€and€expressing€them€as€tons/yearÏresulted€in€the€use€of€very€small€decimal€values.ÌÌà  àò òComment:€€ó óThe€current€emissions€estimate€for€mercury€from€hazardous€waste€kilns€ofÐ òB Ð3.5tons/yr€is€incorrect.€€Industry€data€indicates€the€estimate€should€be€2.75tons/yr.€€The€basis€forÏthe€revised€estimate€is€data€provided€by€the€industry,€to€EPA,€in€a€letter€that€was€submitted€onÏAugust€19,€1996.Ìà  àò òResponse:ó ó€€EPA€agrees€with€the€commenter€that€the€1990€base€year€estimate€of€nationalÐ €Ð Ðmercury€emissions€from€hazardous€waste€burning€cement€kilns€€should€be€2.75tons/year.€€TheÏestimate€is€reduced€due€to€the€application€of€a€lower€mercury€emission€factor€which€EPA€and€theÏindustry€have€agreed€should€be€used€and€the€use€of€a€lower€activity€level€for€the€source€category.€ÏThe€reduced€emissions€estimate€will€be€reflected€in€the€final€112(c)(6)€inventory€report.ÌÌà  àò òComment:ó ó€€The€test€data€used€to€develop€emission€factors€and€estimates€for€cementÐ Ò!"* Ðsources€is€biased€high€because€of€EPA's€regulations€that€require€testing€of€such€sources€be€doneÏunder€worst„case€conditions.€€These€conditions,€such€as€requiring€elevated€temperatures€atÏcontrol€devices,€alter€"actual"€emissions€and€potentially€make€the€data€not€representative€ofÏ"normal"€operation.€€EPA€should€therefore€consider€the€appropriateness€of€a€scaling€factor€toÏreduce€emissions€to€their€actual€levels€to€allow€for€more€appropriate€comparisons€with€otherÏâ âindustry€sectors€in€the€112(c)(6)€listing.Ð $*t%6 Ðà  àò òResponse:ó ó€€EPA€agrees€with€the€commenter€that€emissions€test€data€used€to€develop€theÐ ° Ðâ ânational€emission€estimates€for€dioxin/furans€from€the€hazardous€waste-burning€class€of€cementÏkilns€may€be€biased€high€due€to€the€unfavorable€conditions€during€which€the€emissions€data€wereÏgenerated.€€These€unfavorable€conditions€often€include€operation€of€the€air€pollution€controlÏdevice€at€elevated€temperatures€and€€under€non-optimal€performance€conditions€as€generallyÏrequired€by€existing€Resource€Conservation€and€Recovery€Act€(RCRA)€regulations€duringÏperiodic€compliance€tests.€€Since€much€of€the€dioxin/furan€data€available€to€EPA€was€generatedÏunder€these€conditions,€the€emissions€data,€and€therefore€the€national€emissions€estimate€forÏcement€kilns€burning€hazardous€waste,€may€be€artificially€inflated€and€not€representative€ofÏday-to-day€emissions€levels.€€Despite€these€factors€and€limitations,€EPA€believes€that€the€level€ofÏ"actual€emissions"€would€not€be€sufficiently€different€to€change€the€ranking€of€hazardous€wasteÏkilns€in€the€112(c)(6)€analysis.€€Since€no€alternative€data€were€presented€on€which€to€base€aÏrevised€national€112(c)(6)€emissions€estimate€for€this€category,€the€potentially€biased-highÏinformation€had€to€be€used.ÌÌà  àò òComment:€€ó óThe€1996€dioxin€estimate€given€in€the€112(c)(6)€inventory€is€wrong€becauseÐ tÄ Ðtwo€of€the€facilities€included€in€the€estimate€have€since€closed€(RC's€Festus,€MO€and€NationalÏCement's€Lebec,€CA€plants).€€The€national€dioxin€emissions€estimate€would€be€less€thanÏ23g/year€with€these€two€plants€removed.Ìà  àò òResponse:ó ó€€The€EPA€agrees€with€the€commenter€that€the€closure€of€the€two€referencedÐ R& Ðhazardous€waste€kilns€reduces€the€1996€national€dioxin€TEQ€emission€estimate€to€approximatelyÏ23g€per€year€(0.000025tons€per€year).€€The€final€inventory€report€has€been€revised€accordingly.ÌÌà  àò òComment:ó ó€€Whole€tire€burning€should€be€considered€separately€from€crumb€rubber€as€aÐ $à. Ðscrap€tire€incineration€category.Ìà  àò òResponse:ó ó€€Though€the€approach€suggested€by€the€commenter€might€provide€a€moreÐ Z'ª"2 Ðaccurate€emission€estimate€for€the€source€category,€there€are€currently€no€activity€data€for€1990Ïâ ânational€crumb€rubber€incineration€from€which€to€base€an€emissions€estimate.€€No€data€of€thisÐ $*t%6 Ðtype€€could€be€determined€from€the€literature,€from€industry,€or€from€the€commenter;€thus,€noÏ112(c)(6)€emissions€estimate€was€prepared€for€crumb€rubber€burning.Ìâ âÌà  àò òComment:ó ó€€The€dioxins/furans€and€PCB€estimates€are€questioned€since€they€are€based€onÐ Ö& Ðsamples€obtained€from€a€single€facility.Ìà  àò òResponse:ó ó€€EPA€agrees€with€the€commenter€that€the€amount€of€data€available€to€estimateÐ   ð  Ðemissions€of€these€pollutants€from€this€source€category€is€not€optimal€and€it€would€be€desirable€toÏhave€more€data€points€on€which€to€base€emission€factors€for€the€purposes€of€calculating€aÏnational€estimate.€€However,€no€additional€data€could€be€identified€by€EPA€during€its€search€as€aÏpart€of€the€112(c)(6)€inventory€development€process.€€No€additional€information€was€received€asÏwell€during€the€public€review/comment€process;€therefore,€EPA€has€no€basis€on€which€to€changeÏits€emissions€estimates€and€has€not€done€so€for€the€purposes€of€the€final€112(c)(6)€emissionsÏinventory.ÌÌà  àò òComment:ó ó€€EPAððs€estimates€for€extractable€organic€matter€(EOM)€emissions€from€utilityÐ h Ðcombustion€sources€are€questioned€because€the€reference€relies€on€samples€taken€in€the€mid-toÏlate„1970ððs.Ìà  àò òResponse:ó ó€€EPA€agrees€with€the€commenter€that€the€age€and€extensiveness€of€theÐ D”" Ðinformation€used€to€develop€EOM€emission€estimates€for€this€source€category€is€not€optimal;Ïhowever,€these€data€were€the€only€EOM€information€that€could€be€determined€for€the€purposes€ofÏthe€112(c)(6)€inventory.€€No€additional€data€were€identified€by€industry€or€the€public€during€theÏexternal€review€process;€therefore,€EPA€has€no€information€on€which€to€base€changes€to€theÏexisting€EOM€emission€estimates.€€No€changes€were€made€to€the€national€EOM€emission€Ìestimates€for€this€source€category€in€the€final€112(c)(6)€inventory.ÌÌà  àò òComment:ó ó€€A€commenter€stated€that€the€PCB€estimate€for€utility€oil€combustion€isÐ Z'ª"2 Ðoverstated€and€questions€the€EPAððs€assumptions€in€their€emission€estimate.Ìà  àò òResponse:ó ó€€Due€to€a€lack€of€available€emissions€data€on€€PCB€emissions€from€thisÐ $*t%6 Ðcategory,€EPA€was€forced€to€construct€the€112(c)(6)€inventory€estimate€using€a€series€ofÐ Œ+Ü&8 Ðassumptions€on€the€amount€of€PCBs€contained€in€residual€oil.€€To€fulfill€its€obligations€underÏ112(c)(6),€EPA€took€a€conservative€approach€and€based€the€PCB€level€on€the€maximumÏpermissible€concentration€of€PCBs€in€the€oil.€€Since€no€other€PCB€emissions€data€or€data€on€theÏlevel€of€PCBs€found€in€all€of€the€oil€burned€was€found€or€provided€during€the€public€review€Ìprocess,€EPA€believes€the€estimates€should€remain€as€they€are€in€the€final€112(c)(6)€emissionsÏinventory.ÌÌà  àò òComment:€€ó óOne€commenter€indicated€that€the€mercury€estimate€for€utility€coalÐ ^®  Ðcombustion€is€overstated€and€questions€the€EPAððs€methodology.€€They€suggest€using€the€mercuryÏestimate€€included€in€a€1996€Electric€Power€Research€Institute€(EPRI)€report,€Mercury€in€theÏEnvironment€-€A€Research€Update.Ìà  àò òResponse:ó ó€€As€a€part€of€its€Clean€Air€Act€mandated€study€of€utility€boilers,€EPA€hasÐ ì< Ðstudied€the€mercury€issue€in€depth€and€has€extensively€evaluated€the€industry€data€and€positionÏon€mercury€emissions.€€At€this€time,€the€Agency€believes€the€estimate€it€has€now€for€nationalÌ€mercury€emissions€from€utility€coal€combustion€is€the€correct€one€to€use€for€the€112(c)(6)Ïinventory.€€This€estimate€is€consistent€with€the€data€that€will€be€presented€in€the€final€report€toÏCongress€on€utility€HAP€emissions.ÌÌà  àò òComment:ó ó€€A€commenter€stated€that€the€dioxins/furans€estimates€for€utility€oil€and€coalÐ  ð$ Ðcombustion€are€overstated€and€questions€the€EPAððs€methodology.€€Concern€was€expressed€overÏthe€manner€in€which€EPA€treated€non„detects€when€evaluating€test€data.Ìà  àò òResponse:ó ó€€Since€the€publication€of€the€draft€external€review€112(c)(6)€inventoryÐ Ì!* Ðestimates€for€dioxin/furan€emissions€from€this€category,€EPA€has€revised€its€estimates€throughÏwork€conducted€as€a€part€of€the€project€to€produce€a€Report€to€Congress€on€utility€boiler€HAP€Ìemissions.€€The€dioxin/furan€estimates€for€coal„€and€oil-fired€units€have€been€reduced€byÏapproximately€27percent€and€36percent,€respectively,€from€those€contained€in€the€draftÏ112(c)(6)€inventory.€€EPA€has€evaluated€the€commenter's€concern€over€the€treatment€ofÏnon-detects€in€emissions€test€data€and€believes€that€its€method€of€dioxin/furan€data€analysis€andÏemission€factor€calculation€is€correct€and€consistent€with€the€applicable€test€method.Ð €+Ð&8 Ðà  àò òComment:ó ó€€The€EPAððs€estimate€for€annual€volume€of€creosote„treated€wood€isÐ ° Ðoverstated€by€approximately€80percent.€€New€activity€data€figures€were€provided.Ìà  àò òResponse:ó ó€€EPA€agrees€that€the€commenter's€activity€information€is€an€improvement€overÐ zÊ Ðthe€data€previously€used€in€the€inventory€analysis.€€The€new€activity€data€from€the€commenterÏwere€used€to€construct€the€final€national€emissions€estimate€for€the€wood€treatment€sourceÏcategory.ÌÓQ=XX°` ¸ hÀpÈ xÐ (#€%Ø'0*ˆ,°œXQÓÌà  àò òComment:ó ó€€An€alternate€16-polynuclear€aromatic€hydrocarbon€(PAH)€emission€factor€forÐ jº  Ðwood€treatment/wood€preserving€was€provided€that€was€7percent€higher€than€the€factor€used€inÏEPA€inventory€calculations.Ìà  àò òResponse:ó ó€€EPA€evaluated€the€alternate€emission€factor€provided€by€the€commenter€forÐ –æ  Ðuse€in€constructing€the€national€16-PAH€estimate€for€this€category.€€EPA€could€not€determine€anyÏtechnical€basis€to€change€the€emission€factor€previously€used€to€develop€the€draft€inventory€Ìestimate,€and€therefore,€did€not€apply€the€higher€emission€factor€suggested€by€the€commenter.€ÏHowever,€the€final€inventory€estimate€for€this€category€was€significantly€reduced€from€thatÏcontained€in€the€draft€report€due€to€the€use€of€a€reduced€activity€level€for€the€industry.ÌÌÌÌÌÌÌÌÌÌÌÌÐ  *n%6 ÐÔ  Ôò ò3.0à  àPOLICY€COMMENTS€AND€RESPONSESó óÔ Þ‹ÔÐ ° ÐÌà  àThe€policy-oriented€comments€predominantly€addressed€what€regulatory€programs€couldÏbe€counted€as€fulfilling€the€section112(c)(6)€ð ðsubject€to€standardsðð€requirement,€what€portion€ofÏtotal€source€category€emissions€can€be€credited€as€being€ð ðsubject€to€standardsðð€for€the€sectionÏ112(c)(6)€90percent€requirement,€what€source€categories€should€be€included€in€the€90percentÏð ðsubject€to€standardsðð€analysis,€and€what€are€appropriate€definitions€for€the€polycyclic€organicÏmatter€and€dioxin/furan€pollutants.€€Comments€also€stated€that€EPA€should€do€more€toÏcommunicate€the€emissions€reductions€that€industries€have€done€for€section112(c)(6)€pollutantsÏsince€1990€and€that€current€emissions€are€significantly€below€1990€levels;€and€that€the€aviationÏgasoline€distribution€category€should€not€be€included€in€the€listing€since€there€is€currently€noÏviable€substitute€for€leaded€aviation€fuels€and€recent€discussions€between€the€industry€and€theÏFederal€Aviation€Administration€(FAA)€indicated€no€regulatory€programs€would€be€pursued€forÏleaded€aviation€fuels.€€The€most€substantive€of€these€comments€and€EPA€responses€areÏsummarized€below.ÌÌà  àò òComment:ó ó€€Several€commenters€were€concerned€that€EPA€consider€aviation€safety€andÐ Ð   Ðperformance€standards€when€considering€ð ðGasoline€Distribution€(Aviation)ðð€as€a€source€categoryÏunder€section€112(c)(6).Ìà  àò òResponse:ó ó€€The€EPA€will€consider€such€safety€standards.€€Section€112(d)(2)€standardsÐ üL& Ðrequire€using€the€technology€and€practices€of€the€best€performers€within€an€industry€to€set€theÏstandard€for€the€rest€of€the€industry.ÌÌà  àò òComment:ó ó€€One€commenter€stated€that€credits€for€stage€II€gasoline€distributionÐ Š$Ú. Ðregulations€under€sections€182(b)(3)€and€202(a)(6)€are€only€appropriate€if€they€are€protective€ofÏhuman€health.Ìà  àò òResponse:ó ó€€Section€112(c)(6)€does€not€require€EPA€to€determine€an€emissions€levelÐ ¶($4 Ðð ðprotective€of€human€health.ðð€€€In€any€case,€EPA€is€not€including€stage€II€gasoline€distributionÏemissions€in€the€section€112(c)(6)€analysis€for€the€reasons€described€in€IV.A.5.€below.Ð €+Ð&8 Ðà  àò òComment:ó ó€€One€commenter€stated€that€in€its€section€112(c)(6)€proposal,€EPA€improperlyÐ ° Ðand€illegally€counts€emissions€as€ð ðsubject€to€standardsðð€that€are€not€yet€subject€to€standards,€thatÏare€subject€to€standards€other€than€MACT,€or€that€are€only€partially€subject€to€standards.€€OnlyÏemissions€that€are€subject€to€standards€under€section€Ì112(d)(2)€and€112€(d)(4)€can€be€counted€toward€the€90€percent€goal€contained€in€sectionÏ112(c)(6).Ìà  àò òResponse:ó ó€€The€EPA€made€changes€in€the€final€listing€action€in€response€to€thisÐ  R  Ðcomment.€€First,€HAP€emissions€from€electric€utility€steam€generating€units€were€removed€fromÏthe€analysis.€€Section€112(c)(6)€provides€that,€ð ðThis€paragraph€shall€not€be€construed€to€requireÏthe€Administrator€to€promulgate€standards€for€such€pollutants€emitted€by€electric€utility€steamÏgenerating€units.ðð€€Furthermore,€section€112(n)(1)(A)€requires€EPA€to€perform€a€study€of€theÏpublic€health€hazards€posed€by€HAP€emissions€from€electric€utility€steam€generating€units€and€toÏregulate€those€sources€if€ð ðappropriate€and€necessary€after€considering€the€results€of€the€study.ðð€ÏThe€EPA€believes€that€those€provisions€give€the€Agency€discretion€to€exclude€utility€emissionsÏfrom€listing€and€regulation€under€section€112(c)(6).€€Congress€enacted€section€112(n)(1)(A)€toÏestablish€the€mechanism€for€determining€whether€regulation€of€utility€HAP€emissions€underÏsection€112€was€ð ðappropriate€and€necessaryðð€and€section€112(c)(6)€specifically€acknowledgesÏthat€function.€€The€EPA€believes€that€the€language€used€in€section€112(c)(6)€reflects€CongressððÏdetermination€that€the€mechanism€established€by€section€112(c)(6)€is€not€appropriate€for€theÏregulation€of€utility€HAP€emissions.€€€Therefore,€EPA€has€removed€utility€HAP€emissions€fromÏthis€analysis.Ìà  àSecond,€EPA€has€added€information€on€whether€each€Industrial€Combustion€CoordinatedÏRulemaking€(ICCR)€category€will€be€subject€to€section€112€or€section€129€standards.€€(EPA€hasÏfound€section€112(d)(2)€and€129€standards€to€be€substantively€the€same,€as€discussed€in€the€draftÏlisting€òòFederal€Registeróó€notice.Ð ì%