WPC# =&̭M۰=BIp 9 X`à4p'kޛ;AN7 b2Ѓۑ\DϾ'G+TiֈWi̊JosaX" g_y+C.V)t+W;X0RU U4ǿriG%W6ǠY[8<=Or6Bg>qu&˖#uٚS9-EMRȋ6lU h>Ir9P!\Y EUu ^#'h6C7}sg2^vQbO<ʗnQ#*.<<ɑzYэzxAFWMERd߽v3s9c{t5_w!,5QL΃}յZĥ ( 9QPN1 (sV}n,oNV@}&ij#1UN3 %3 0:3^ 4w@'44g4{44 m4 724 0N4UF#5 0wi5N5 7256 0*6 07 08 08 09 0: 0; 0m< 0F= 0 > 0> 0? 0@ 0zA 0JB 0C 0C 0D 0lE 0GF 0G 0G 0H 0I 0aJ 0*K 0K 1_L 72M 72DM 7 vM 0cMNM 0MN 0N 0[O 0O 0P 0vQ 0QR 0D@S 1T C* U 12u7U 72U^U 0<\NW\:Y\ 72\:\ 1\:]U*]U>] 72(^ 72Z^Z^ 72^ 0 4^N^ B^ 72_ 72C_ C.0u_f_ 0<_ 72_ 72`aG`f[` 72]` 72`N` 1` 1Jaaa 72a 72b<Ib 72b 72bbNlfnfgil 0m 0 Ddn 72nnNo 72o2!p2Sp 72pNp ApNXqNZq<\q8q 72q:r 0v 0`Y 0` 0` 0`y 0` 089 0q 02C 0u 0:q 0Y 0_ 0 c 0jm 0 B*[ D/ 0 D/8 0g 065 0kk 0:s 0^ 0< U6GU>}U* D5 0V ASp 0DUF 1 1N!HP LaserJet 2200 Series PCL 60(9 Z6Times New Roman RegularX($USUS.,D|O/ 0+1234D567D8+<rY.x좡 3|x<U>i)(O$<4 9Z+.Courier New Regular(O;$0  2#  a  .3  0` (#(#>i)   2G+J 0_level1  X /%4 4 <DL/23  ..  2( 4 <DL2  2D+J 0_level2   ," <DL,23  ..  2( 4 <DL2  2A+J 0_level3   ) <DL)23  ..  2( 4 <DL2  2>+J 0_level4  ` &<<DL&23  ..  2( 4 <DL2  2;+J 0_level5   #DL#23  ..  2( 4 <DL2  28+J 0_level6    DL 23  ..  2( 4 <DL2  25+J 0_level7  h DDL23  ..  2( 4 <DL2  22+J 0_level8   L23  ..  2( 4 <DL2  2/+J 0_level9    L23  ..  2( 4 <DL2  2GJ 0_levsl1  X /%4 4 <DL/23  Ԁ  2( 4 <DL2  2DJ 0_levsl2   ," <DL,23  Ԁ  2( 4 <DL2  2AJ 0_levsl3   ) <DL)23  Ԁ  2( 4 <DL2  2>J 0_levsl4  ` &<<DL&23  Ԁ  2( 4 <DL2  2;J 0_levsl5   #DL#23  Ԁ  2( 4 <DL2  28J 0_levsl6    DL 23  Ԁ  2( 4 <DL2  25J 0_levsl7  h DDL23  Ԁ  2( 4 <DL2  22J 0_levsl8   L23  Ԁ  2( 4 <DL2  2/J 0_levsl9    L23  Ԁ  2( 4 <DL2  2GJ 0_levnl1  X /%4 4 <DL/23   2( 4 <DL2  2DJ 0_levnl2   ," <DL,23   2( 4 <DL2  2AJ 0_levnl3   ) <DL)23   2( 4 <DL2  2>J 0_levnl4  ` &<<DL&23   2( 4 <DL2  2;J 0_levnl5   #DL#23   2( 4 <DL2  28J 0_levnl6    DL 23   2( 4 <DL2  25J 0_levnl7  h DDL23   2( 4 <DL2  22J 0_levnl8   L23   2( 4 <DL2  2/J 0_levnl9    L23   2( 4 <DL2  0(359?CGKOS1 1. - >i)- (;3$2#  0  .3  0  <SS@O:QuickFormat1 XXX  cb   XXX  cb   (b$0  0` (#(#2#   .3  0 ` (#` (#(xir$0  0` (#(#0 ` (#` (#2#(  0  )3  0 (# (#($0  0` (#(#0 ` (#` (#0 (# (#2#(  a  )3  0h(#(#(F$0  0` (#(#0 ` (#` (#0 (# (#0h(#(#2#(   )3  0h(#h(#($0  0` (#(#0 ` (#` (#0 (# (#0h(#(#0h(#h(#2#  0  )3  0(#(#({$0  0` (#(#0 ` (#` (#0 (# (#0h(#(#0h(#h(#0(#(#2#  a  )3  0p(#(#(F$0  0` (#(#0 ` (#` (#0 (# (#0h(#(#0h(#h(#0(#(#0p(#(#2#     )3  0p(#p(# 156789:xGGaeimquy}Bullet ListBullets List&25% Filld3#37=CIQYag1.a.i.(1)(a)(i)1)a)>i) TTRY,3' LetterP('3 Letter Landscape 3' Letter'3 Letter LandscapeT<:page nu font6cw4Body Text  &&&?S%2A`Arial?XXXST\  `&Times New RomanS  (-2$ !USUS.,  <$w:footnote tex  XXX  <4 9Z+ Courier New (5hCEKQW]cioAutoList11.1.1.1.1.1.1.1.156789:h[EGKOSW[_cAutoList2522222222)1)a)(.3$ !USUS.,  <:footnote ref156789:x?[_cgkoswSquaresSquare Bulletmailto:A-and-R-Docket@epa.gov.mailto:silvasi.john@epa.gov.>i)mailto:gerth.denise@epa.gov.156789:xA_cgkosw{DiamondsDiamond Bullet````````mailto:gerth.denise@epa.gov.%2A`Arial\  `&Times New Roman>i)>i)>i)&c$""0  d>i)>i),Pattern #12dd <:Default Para>i)>i)Table_A>i)>i)(EhCEKQW]cioAutoList21.1.1.1.1.1.1.1.(UhCEKQW]cioAutoList31.1.1.1.1.1.1.1.Table_A>i)>i)http://www.epa.gov/fedrgstr/.>i)>i) y uУ$USUS.,X.XXXX.XXX. `   11    _FX.XXX.REVISED:BackgroundInformationDocument,  HypotheticalNonattainmentAreasforPurposesof  UnderstandingtheEPAProposedRuleforImplementingthe \ 8-hourOzoneNationalAmbientAirQualityStandardin 2 RelationtoReOpenedCommentPeriod.IllustrativeAnalysis X Basedon20002002Data.U.S.EnvironmentalProtection . Agency,OfficeofAirandRadiation,OfficeofAirQuality   PlanningandStandards,Draft,October2003.Availableat:   http://www.epa.gov/ttn/naaqs/ozone/o3imp8hr/.#X.XXFX.#  uУ$USUS.,X.XXXX.XXX. `   10    _BackgroundInformationDocument,Hypothetical  NonattainmentAreasforPurposesofUnderstandingtheEPA  ProposedRuleforImplementingthe8-hourOzoneNational \ AmbientAirQualityStandard.IllustrativeAnalysisBased 2 on19982000Data.U.S.EnvironmentalProtectionAgency, X OfficeofAirandRadiation,OfficeofAirQualityPlanning . andStandards,Draft,April2003.Availableat:   http://www.epa.gov/ttn/naaqs/ozone/o3imp8hr/.  uУ$USUS.,X.XXXX.XXX. `   2    _ԀSeee.g.,HuntonandWilliamsLLPrepresentingthe  UtilityAirRegulatoryGroup(UARG),docketdocument  OAR-2003-0079-0362;NortheastStatesforCoordinatedAirUse \ Management,OAR200300790315f  g f  g ;KansasCityPowerandLight 2 (KCPL),docketdocumentOAR200300790185;FirstEnergy X Corporation,docketdocumentOAR-2003-0079-0218f  g  | uУ$USUS.,X.XXXX.XXX. `   3    _Seee.g.,SouthCoastAirQualityManagementDistrict,  docketdocumentOAR200300790327;E.I.duPontdeNemours,  Inc.,docketdocumentOAR200300790246.(z(2У$ !USUS.,  XIXXXXIXXXI `   0  (#$  0  >i)  uУ$USUS.,X.XXXX.XXX. `   6    _ԀThiscommentwasraisedwithrespecttobothOption1  andOption2.>i)http://www.epa.gov/rpas/http://www.epa.gov/rpas,>i) I&mage <=8C HKKKKmailto:A-and-R-Docket@epa.govmailto:silvasi.john@epa.gov>i)mailto:gerth.denise@epa.gov. uУ$USUS.,X.XXXX.XXX. `   9    _ @< IntheJune2,2003proposal,wecalculatedtherange  foreachclassificationusingthefollowingformula:((the  levelofthe8-hourstandard0.08)+(0.08X(thepercent \ the1-hourthresholdisabovethe1-hourstandardof 2 0.12)/100).Ratherthanusingthisformulatoseethe X bottomthresholdforthemarginalclassification,_____we_Ԁsetthe . thresholdat0.085,whichisthelowestdesignvalueofany   areathatwouldbedesignatednonattainmentforthe8-hour   standard.(Seediscussionat68FR32812,middlecolumnand `   footnote1toTable2onsamepage.)Ifweapplythesame N formulausing50percentofthepercentagethatthe1-hour $ thresholdisabovethe1-hourstandard,therangeofthe  marginalclassificationwouldshrinktoonevalue,viz.,  0.085ppm,withthelowerthresholdforthemoderate  X classificationbeing0.086ppm.Webelievesucharesultis | . notconsistentwithCongressionalintentsinceitwouldgive R  themarginalclassificationlittleornomeaning.Thus,for (  purposesofthisoption,webelieveitmakessensetouse   0.085ppm(theminimumexceedingvalueofthe8-hour    standard),ratherthan0.08ppm(thelevelofthe \  standard)forthecalculation.Therefore,weusedthe 2  followingformulaforestablishingtheclassificationranges V  forthisapproach:(0.085+(0.085X(0.5X(thepercent ,  the1-hourthresholdisabovethe1-hourstandardof   0.12))/100).FX.XXX.Asanindicationofthedifferencethismakes,   therewouldonlybe1marginalareawiththelowerthreshold `  formoderateareasbeing0.086_ppm_,comparedto10marginal 6 areaswiththerevisedmethodweemployed,where0.091would Z  bethelowerthresholdformoderateareas;seeTables1and 0 2below,whicharedescribedinthenextsection.#X.XXFX.j#  uУ$USUS.,X.XXXX.XXX. `   5    _Wedonotattempttocitetoallcommentswhichmay  haveraisedaspecificalternative;ratherwetrytocite  examplesofcommentsinwhichthealternativeswere \ discussed.  uУ$USUS.,X.XXXX.XXX. `   7    _ԀFX.XXX.Theirrationalewasthatmoreareasshouldbeplaced  inhigherclassificationstoensurethattheyimplementthe  mandatorycontrolmeasurescontemplatedbyCongressandhave \ aspecifiedrateofreductionouttotheirattainmentdate. 2 However,theybelievedourruleshouldrequireall8hour X nonattainmentareastobecoveredundersubpart2.#X.XXFX.#http://www.epa.gov ` uУ$USUS.,X.XXXX.XXX. `   12    _E.g.,AmericanPetroleumInstitute,docketdocument  OAR-2003-0079-0281;MichiganChemistryCouncil,docket  documentOAR-2003-0079-0200(.3$ !USUS.,  ݁Level 1Level 2Level 3Level 4Level 5  uУ$USUS.,X.XXXX.XXX. `   4    _Wedonotdiscussallpossiblealternativesraisedin  thecommentsbutratherthealternativesthatwebelieveare  mostlikelytoimprovetheimplementationframework.(.3$ !USUS.,  )!dxdx( $ Figure  1  &OLE 2.0 Box <=8C HKKKK  uУ$USUS.,X.XXXX.XXX. `   1    _E.g.,CleanAirTaskForce,docketdocument  OAR-2003-0079-0154;EnvironmentalDefense,docketdocument  OAR-2003-0079-0264,-0265,-0266;MassachusettsDepartment \ ofEnvironmentalProtection,docketdocumentOAR20030079 2 0267.  uУ$USUS.,X.XXXX.XXX. `   9    _ @< IntheJune2,2003proposal,wecalculatedtherange  foreachclassificationusingthefollowingformula:((the  levelofthe8-hourstandard0.08)+(0.08X(thepercent \ the1-hourthresholdisabovethe1-hourstandardof 2 0.12)/100).Althoughtherangeforthemarginal X classificationwascalculatedusing0.08ppm,wesetthe . thresholdat0.085,whichisthelowestdesignvalueofany   areathatwouldbedesignatednonattainmentforthe8-hour   standard.(Seediscussionat68FR32812,middlecolumnand `   footnote1toTable2onsamepage.)Ifweapplythesame N formulausing50percentofthepercentagethatthe1-hour $ thresholdisabovethe1-hourstandard,therangeofthe  marginalclassificationwouldshrinktoonevalue,viz.,  0.085ppm,withthelowerthresholdforthemoderate  X classificationbeing0.086ppm.Webelievesucharesultis | . notconsistentwithCongressionalintentsinceitwouldgive R  themarginalclassificationlittleornomeaning.Thus,for (  purposesofthisoption,webelieveitmakessensetouse   0.085ppm(theminimumexceedingvalueofthe8-hour    standard),ratherthan0.08ppm(thelevelofthe \  standard)forthecalculation.Therefore,weusedthe 2  followingformulaforestablishingtheclassificationranges V  forthisapproach:(0.085+(0.085X(0.5X(thepercent ,  the1-hourthresholdisabovethe1-hourstandardof   0.12))/100).X.XXX.Asanindicationofthedifferencethismakes,   therewouldonlybe1marginalareawiththelowerthreshold `  formoderateareasbeing0.086_ppm_,comparedto10marginal 6 areaswiththerevisedmethodweemployed,where0.091would Z  bethelowerthresholdformoderateareas;seeTables1and 0 2below,whicharedescribedinthenextsection.#X.XXFX.#>i)<4 9Z+ Courier New >i)>i)>i)>i)>i)156789:x4Icgkosw{Large BulletLarge Bullet<PP@:QuickFormat2XXX  cb  XXX  cb  <ll@]:QuickFormat3XXXXXXXXcb  XXXXXXXXcb  <;<4 9Z+ Courier New >i)>i)  uУ$USUS.,X.XXXX.XXX. `   8    _FX.XXX.Therationaleforthe50percentadjustmentwasthat  the8hourstandardismorestringentthanthe1hour  standardandthatpastairqualitytrendsshowedthat8hour \ averageozoneconcentrationsdeclinedoverthepast20years 2 atabouthalftheratethat1houraveragesdeclined.Thus, X wewouldexpectattainmentforareaswith8hourvaluesa . certainpercentageabovethestandardtotakerelatively   moretimetoattainthe8hourstandardthanareaswith1   hourvaluesthesamepercentageabovethe1hourstandard `  wouldtaketoattainthe1hourstandard.#X.XXFX.#>i)>i)>i)>i)  uУ$USUS.,XXXXXXXX `   10    _BackgroundInformationDocument,Hypothetical  NonattainmentAreasforPurposesofUnderstandingtheEPA  ProposedRuleforImplementingthe8-hourOzoneNational \ AmbientAirQualityStandard.IllustrativeAnalysisBased 2 on19982000Data.U.S.EnvironmentalProtectionAgency, X OfficeofAirandRadiation,OfficeofAirQualityPlanning . andStandards,Draft,April2003.Availableat:   http://www.epa.gov/ttn/naaqs/ozone/o3imp8hr/.<4 9Z+ Courier New  y uУ$USUS.,XXXXXXXX `   11    _XXXXREVISED:BackgroundInformationDocument,  HypotheticalNonattainmentAreasforPurposesof  UnderstandingtheEPAProposedRuleforImplementingthe \ 8-hourOzoneNationalAmbientAirQualityStandardin 2 RelationtoReOpenedCommentPeriod.IllustrativeAnalysis X Basedon20002002Data.U.S.EnvironmentalProtection . Agency,OfficeofAirandRadiation,OfficeofAirQuality   PlanningandStandards,Draft,October2003.Availableat:   http://www.epa.gov/ttn/naaqs/ozone/o3imp8hr/.#XXXFXƲ#>i) ` uУ$USUS.,XXXXXXXX `   12    _E.g.,AmericanPetroleumInstitute,docketdocument  OAR-2003-0079-0281;MichiganChemistryCouncil,docket  documentOAR-2003-0079-0200>i)<4 9Z+ Courier New   uУ$USUS.,XXXXXXXX `   1    _E.g.,CleanAirTaskForce,docketdocument  OAR-2003-0079-0154;EnvironmentalDefense,docketdocument  OAR-2003-0079-0264,-0265,-0266;MassachusettsDepartment \ ofEnvironmentalProtection,docketdocumentOAR20030079 2 0267.<4 9Z+ Courier New >i)>i)  uУ$USUS.,XXXXXXXX `   2    _ԀSeee.g.,HuntonandWilliamsLLPrepresentingthe  UtilityAirRegulatoryGroup(UARG),docketdocument  OAR-2003-0079-0362;NortheastStatesforCoordinatedAirUse \ Management,OAR200300790315f  g f  g ;KansasCityPowerandLight 2 (KCPL),docketdocumentOAR200300790185;FirstEnergy X Corporation,docketdocumentOAR-2003-0079-0218f  g <4 9Z+ Courier New  | uУ$USUS.,XXXXXXXX `   3    _Seee.g.,SouthCoastAirQualityManagementDistrict,  docketdocumentOAR200300790327;E.I.duPontdeNemours,  Inc.,docketdocumentOAR200300790246.>i)>i)>i)>i)<;<4 9Z+ Courier New <4 9Z+ Courier New <4 9Z+ Courier New   uУ$USUS.,XXXXXXXX `   4    _Wedonotdiscussallpossiblealternativesraisedin  thecommentsbutratherthealternativesthatwebelieveare  mostlikelytoimprovetheimplementationframework.<4 9Z+ Courier New   uУ$USUS.,XXXXXXXX `   5    _Wedonotattempttocitetoallcommentswhichmay  haveraisedaspecificalternative;ratherwetrytocite  examplesofcommentsinwhichthealternativeswere \ discussed.<4 9Z+ Courier New   uУ$USUS.,XXXXXXXX `   6    _ԀThiscommentwasraisedwithrespecttobothOption1  andOption2.<4 9Z+ Courier New   uУ$USUS.,XXXXXXXX `   7    _ԀXXXXTheirrationalewasthatmoreareasshouldbeplaced  inhigherclassificationstoensurethattheyimplementthe  mandatorycontrolmeasurescontemplatedbyCongressandhave \ aspecifiedrateofreductionouttotheirattainmentdate. 2 However,theybelievedourruleshouldrequireall8hour X nonattainmentareastobecoveredundersubpart2.#XXXFX#<4 9Z+ Courier New   d<4 9Z+ Courier New   uУ$USUS.,XXXXXXXX `   8    _XXXXTherationaleforthe50percentadjustmentwasthat  the8hourstandardismorestringentthanthe1hour  standardandthatpastairqualitytrendsshowedthat8hour \ averageozoneconcentrationsdeclinedoverthepast20years 2 atabouthalftheratethat1houraveragesdeclined.Thus, X wewouldexpectattainmentforareaswith8hourvaluesa . certainpercentageabovethestandardtotakerelatively   moretimetoattainthe8hourstandardthanareaswith1   hourvaluesthesamepercentageabovethe1hourstandard `  wouldtaketoattainthe1hourstandard.#XXXFX#<4 9Z+ Courier New <4 9Z+ Courier New   uУ$USUS.,XXXXXXXX `   9    _ @< IntheJune2,2003proposal,wecalculatedtherange  foreachclassificationusingthefollowingformula:((the  levelofthe8-hourstandard0.08)+(0.08X(thepercent \ the1-hourthresholdisabovethe1-hourstandardof 2 0.12)/100).Althoughtherangeforthemarginal X classificationwascalculatedusing0.08ppm,wesetthe . thresholdat0.085,whichisthelowestdesignvalueofany   areathatwouldbedesignatednonattainmentforthe8-hour   standard.(Seediscussionat68FR32812,middlecolumnand `   footnote1toTable2onsamepage.)Ifweapplythesame N formulausing50percentofthepercentagethatthe1-hour $ thresholdisabovethe1-hourstandard,therangeofthe  marginalclassificationwouldshrinktoonevalue,viz.,  0.085ppm,withthelowerthresholdforthemoderate  X classificationbeing0.086ppm.Webelievesucharesultis | . notconsistentwithCongressionalintentsinceitwouldgive R  themarginalclassificationlittleornomeaning.Thus,for (  purposesofthisoption,webelieveitmakessensetouse   0.085ppm(theminimumexceedingvalueofthe8-hour    standard),ratherthan0.08ppm(thelevelofthe \  standard)forthecalculation.Therefore,weusedthe 2  followingformulaforestablishingtheclassificationranges V  forthisapproach:(0.085+(0.085X(0.5X(thepercent ,  the1-hourthresholdisabovethe1-hourstandardof   0.12))/100).XXXXAsanindicationofthedifferencethismakes,   therewouldonlybe1marginalareawiththelowerthreshold `  formoderateareasbeing0.086_ppm_,comparedto10marginal 6 areaswiththerevisedmethodweemployed,where0.091would Z  bethelowerthresholdformoderateareas;seeTables1and 0 2below,whicharedescribedinthenextsection.#XXXFX#>i)<4 9Z+ Courier New <4 9Z+ Courier New >i)>i)0ҲCEKSY_ekqAutoList4A.(1)A.A.A.A.A.A.(CEMU]emu}AutoList5(1)(1)(1)(1)(1)(1)(1)(1)(ڽCEKQW]cioAutoList6A.A.A.A.A.A.A.A.>i)<J+M :Outline001_1   2( ` hp x 223  ..  5+ ` hp x 5  <G+M :Outline001_2   /%` ` hp x /23  ..  5+ ` hp x 5  <D+M :Outline001_3 j  ," hp x ,23  ..  5+ ` hp x 5 j <A+M :Outline001_4  ` ) hp x )23  ..  5+ ` hp x 5  <>+M :Outline001_5   &hhp x &23  ..  5+ ` hp x 5  <;+M :Outline001_6 j  #p x #23  ..  5+ ` hp x 5 j <8+M :Outline001_7  h  p x 23  ..  5+ ` hp x 5  <5+M :Outline001_8   pp x 23  ..  5+ ` hp x 5  <2+M :Outline001_9 j   x 23  ..  5+ ` hp x 5 j )Hairline d456789:= 35;AGMSY_21.a.i.1.a.i.1.a.>i)<;>i)*+ (_2623  ..*D+J (_25   ," <DL,23  ..  2( 4 <DL2  *A+J (_24   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5,*CITE,dl*CODEK"<6X9`(Courier NewKS#\  `&Times New RomanS42Emphasis64Hyperlink    <:FollowedHype    4go2Keyboard K"<6X9`(Courier NewKS#\  `&Times New RomanS <:Preformatted/%  ,Kk %#/K"<6X9`(Courier NewKS#\  `&Times New RomanS/%  ,Kk %#/<:zBottom of 7(X7  ?$%2A`Arial?  S#\  `&Times New RomanS7(X7&  d d)1dxd<:zTop of For7(X7  ?$%2A`Arial?  S#\  `&Times New RomanS7(X7)2dxd0KS.SampleK"<6X9`(Courier NewKS#\  `&Times New RomanS0.Strong 8dl6TypewriterK"<6X9`(Courier NewKS#\  `&Times New RomanS42Variable: 8HTML MarkupB      2 0CommentB  <6X9`(Courier New\  `&Times New Roman%2A`Arial[[[[)!dxdx(.3$ !USUS.,  E<<CLevel 1Level 2Level 3Level 4Level 5($$   1  .Courier New Regular156789:hzCEIMQUY]aAutoList7""""""""i)1)a)(CEKQW]cioAutoList8A.A.A.A.A.A.A.A. !USUS.,  _A  X.XXXX.XXX.f @ g 8.XXdd8  f  g OaA=  A=6݌̌  ݀656050P \   ENVIRONMENTALPROTECTIONAGENCY X 40_CFR_ԀPart51     [FRL]     _RIN_Ԁ2060  `    ProposedRuletoImplementthe8HourOzoneNationalAmbient (x  AirQualityStandard  @   AGENCY: EnvironmentalProtectionAgency(EPA).   ACTION: Reopeningofpubliccommentperiod.   SUMMARY: Inthisdocument,wearereopeningthepublic H commentperiodontheProposedRuletoImplementthe8Hour ` OzoneNationalAmbientAirQualityStandard(_NAAQS_Ԁor   standard)thatwaspublishedonJune2,2003(68FR32802) h tosolicitadditionalcommentonalternativeapproachesfor d classifyingozone_nonattainment_Ԁareas,basedoncomments  receivedduringthecommentperiod.Thecommentperiodon l   theproposedruleoriginallyclosedonAugust1,2003. "h" Basedoncommentsreceivedontheproposedrule,weare #$ reconsideringhowtoclassifyareasandaregivingthe p% & publictheopportunitytocommentontwoalternative 'l"( strategiesforclassifyingareas. ($*  DATES: Commentsmustbereceivedonorbefore[ insertdate t*%,  15daysfromdateofpublication] . <,'. _ ADDRESSES: AllcommentsshouldbesubmittedtoDocket#OAR N  20030079.Whenmailingdocuments,comments,orrequeststo  theEPADocketCenterthroughtheU.S.PostalService,  t pleaseusethefollowingaddress:U.S.Environmental n  ProtectionAgency,EPAWest(AirDocket),1200Pennsylvania   Avenue,N.W.,MailCode:6102T,Washington,DC20460.To x  mailcommentsordocumentsthroughacourierservice,the r$  mailingaddressis:EPADocketCenter(AirDocket),U.S.   EnvironmentalProtectionAgency,1301ConstitutionAvenue, |  N.W.,Room:B108;MailCode:6102T,Washington,DC20460. v( Thenormalbusinesshoursare8:30a.m.to4:30p.m.,Monday " throughFriday,excludingFederalholidays.Commentscanbe  submittedtotheaddressabove,byfax(202)5661741,orby z, emailto4L  O  5  AandRDocket@epa.gov.6x  O   7  ԀThevoicetelephone & numberis(202)5661742.Inaddition,wehaveplaceda  varietyofmaterialsregardingimplementationoptionsonthe ~0 website:4  O  5  www.epa.gov/ttn/naaqs/ozone/o3imp8hr6 O"  7 P.While *!  thiswebsiteisnotanexactduplicateoftheAirDocket, "" wehaveplacedmaterialsthatwehavegeneratedand $4$ materialsthathavebeensubmittedinanelectronicformat .&& onthewebsite.Werequestthatcommentsbesubmittedby '!( emailtofacilitateexpeditiousdistributionwithinEPAand )8#* placementonthewebsite. 2+$,  FORFURTHERINFORMATIONCONTACT: Mr.JohnSilvasi,Office ,&. ofAirQualityPlanningandStandards,U.S.Environmental N ProtectionAgency,MailCodeC53902,ResearchTriangle  Park,NC27711,phonenumber(919)54l5666orbyemailat:  X 4N  O  5  silvasi.john@epa.gov6 O  7 h,4P h O  5  6 O  7 hԀorMs.DeniseGerth,OfficeofAir R  QualityPlanningandStandards,U.S.Environmental   ProtectionAgency,MailCodeC53902,ResearchTriangle \  Park,NC27711,phonenumber(919)54l5550orbyemailat: V  4R  O  5  gerth.denise@epa.gov6e Oy  7 h.    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'!(  #X.XXFX.#FX.XXX.II.BACKGROUND )P#*  ` OnJune2,2003(68FR32802),weproposedoptionsfor J+$, implementingthe8-hourozone_NAAQS_,includingtwodifferent ,&. classificationoptions.Classificationsestablishwhich N requirementsapplytoindividual_nonattainment_Ԁareasandthe  maximum_timeframe_Ԁforareastoattain.Option1wouldplace  X all8hourozone_nonattainment_Ԁareasintosubpart2and R  wouldclassifyareasinaccordancewithtable1insection   181oftheCAAasmodifiedbyEPAtoreflectthe8hour \  _NAAQS_.#X.XXFX.K#FX.XXX.>?ԀOption2wouldplaceareasthataredesignated V  _nonattainment_Ԁforthe8-hourozonestandardundersubpart1   orsubpart2(ofpartD,titleI)basedontheareas1-hour `  ozonedesignvalue.Areasplacedundersubpart2wouldbe Z  classifiedinaccordancewithtable1insection181ofthe  CleanAirAct(CAA)asmodifiedbyEPAtoreflectthe8hour d _NAAQS_.(Ingeneral,subpart1containslessprescriptive ^ requirementsforairqualityplanningthandoessubpart2.)   Weindicatedapreferenceforclassificationoption2 h becauseitwouldprovidemoreflexibilitytoStatesand b Tribesastheyaddresstheiruniqueairqualityproblems.#X.XXFX.2O#FX.XXX.eO?Ԁ !   ` Wereceivedmanycommentsconcerningtheclassification "l" optionsweproposed.Anumberof_commenters_Ԁfavoredoption f$$ 2,indicatingthattheybelieveditprovidedneeded && flexibilityinimplementingthestandard.Other_commenters_ 'p!( favoredoption1,indicatingthattheybelievedthatthe j)#* SupremeCourtrulingestablishedapreferenceforsubpart2 +$, and,therefore,itwasnotappropriatetoclassifyareas ,t&. undersubpart1.NortheastStatesandsomeotherStates,as N wellasenvironmentalorganization_commenters_,0000 v#  1      #X.XXFX.#S#FX.XXX.VS?Ԁobjectedto  allowingsomeareastobesubjecttosubpart1,statingthat  X themandatorymeasuresundersubpart2helpedreduceozone R  concentrationsandwereaforcingfunctionformore   expeditiouscontrol.AnumberofotherStatesoutsidethe \  Northeastpreferredthatsomeareasbecoveredundersubpart V  1,becauseoftheflexibilityitprovidedtolocalareasto   adoptcontrolsthatareappropriatefortheirarea.#X.XXFX.&W#FX.XXX.YW? `   ` Severalother_commenters_Ԁsuggestednewoptionsor Z  variantsofoption2.Thereweretwokeyconcernsthat  seemedtobethebasisformostofthesecomments.First, d many_commenters_ԀwereconcernedthatunderEPAsoption2, ^ someareasclassifiedundersubpart1couldhaveworse8   hourairqualitythanareasclassifiedundersubpart2.0s000 v#  2      ׀ h Manyofthese_commenters_Ԁnotedthatitseemedinequitableto b haveareaswithmoresignificantairqualityproblems !  subjecttolessstringentplanningobligationsandmore N flexibleattainmentperiods.Second,anumberof_commenters_  raisedaconcernthatthedistributionschemeundera  X modifiedTable1resultedintoomanyareasinthelower R  classifications.These_commenters_Ԁbelievedthatthe   classificationformanyareasunderthisapproachwouldnot \  reflectthesignificanceofthe8hourozoneproblemfor V  theseareasandthereforewouldnotprovidetheappropriate   amountoftimeneededforthoseareastoattainthe `  standard.0t000 v#  3      ׀#X.XXFX.Y#FX.XXX. Z   ` Inconsideringthecommentsonthisissue,we  identifiedseveralsuggestionsthatwebelievedeserve d furtherconsiderationastheymayaddresssomeoftheabove ^ notedconcerns.0000 v#  4      ׀Wearethereforereopeningthecomment   periodforthelimitedpurposeofacceptingcommentonthe h alternativessuggestedinsomeofthecomments.Whilewe#X.XXFX.a#FX.XXX.Ԁ b recognizethatthisactionwilldelaybyabriefperiodthe !  issuanceofthefinalruletoimplementthe8hour_NAAQS_,we "l" believethatthecommentssubmittedonclassificationsmerit f$$ theconsiderationofnewalternativesandtheopportunity && forthepublictoreviewandcommentonthesealternatives. N Below,weprovideabriefsummaryofseveralalternative  approachessubmittedinthecommentsandindicatethedocket  X numberofrelevantcommentdocumentssothatanyinterested R  personcanreviewthosecomments.0000 v#  5      ׀Wethendescribetwo   specificapproachesforincorporatingsomeofthese \  suggestionsintoaclassificationschemeforthe8hour V  standardthat,basedonourinitialreviewofthecomments,   seemthemostpromisingforimprovingtheimplementation `  framework.Whileweareopentocommentonanyoftheideas Z  suggestedduringtheinitialcommentperiod,wearemost  interestedinhearingcommentontheconceptswehave d incorporatedintothetwoalternativef  g f  g f  g approacheswediscuss ^ below.Wealsoprovidecomparisonsoftwoalternativeswith   ourpreviouslyproposedoption2withouttheincentive h feature.Thisdoesnotimplythatwehavedecidedtonot b includetheincentivefeature,nordoesitimplythatwe !  havedecidednottoadoptourproposedoption1.In "l" addition,wemayaddtothedocketadditionalmaterialasit f$$ becomesavailablethatrelatestothetwoalternatives && discussedbelow;readersshouldcontinuetocheckthe 'p!( _electronicdocketforanysuchmaterialduringthecomment N period.   ` SequentialImplementation.Severalcommenters  X contendedthatEPAdoesnothavethef  g authoritytof  g rewrite R  thestatutebymodifyingTable1insection181(a)to   reflectthe8hourNAAQS(seee.g.,commentsfrom \  ElectronicsIndustriesAlliance,docketdocument V  OAR-2003-0079-0156;andAdvancedMicroDevices,Inc.,docket   documentOAR200300790139).Thesecommenterssuggested `  thatEPAadoptasequentialimplementationschemeunder Z  whichareasthataremeetingthe1hourNAAQSbutnotthe8  hourNAAQSwouldbedesignatedinApril2004asnotmeeting d the8hourNAAQSandbeginimplementationundersubpart1. ^ Areasthatarestillviolatingthe1hourNAAQSwould   continuetoimplementthe1hourNAAQSundersubpart2and h wouldnotbedesignatedforthe8hourNAAQSorbegin b implementingthatstandarduntiltheareaattainsthe1hour !  NAAQS.Atthetimeanareaisdesignatednonattainmentfor "l" the8hourNAAQS,itwouldbeclassifiedundersubpart1for f$$ thatstandard.Thusallareaswouldbeclassifiedunder && subpart1forthe8hourNAAQS.Thisapproachwould 'p!( eliminatetheinequityissuebyplacingall8hourareas j)#* undersubpart1andwouldallowmoreflexibilityinsetting +$, attainmentdatesforareasalthoughthemaximumattainment ,t&. periodwouldbe10yearsfromdesignation.However,EPA N believesthatthisapproachconflictswiththeSupreme  Courtsholdingthattheclassificationprovisionsof  X subpart2mustapplyforpurposesofimplementingthe8hour R  NAAQS.SeeWhitmanv.ATA,121S.Ct.903,917(2001).    ` Use8hourdesignvaluesexclusivelyunderOption2. \  Severalcommentersthatsupportedoption2recommended V  againstusingthe1hourdesignvaluefordeterminingwhich   areaswouldbeclassifiedundersubpart1andwhichwouldbe `  classifiedundersubpart2.(Seee.g.,UARG,docket Z  documentOAR-2003-0079-0362;KansasCityPower&Light,  docketdocumentOAR200300790185;TXUEnergydocket d documentOAR200300790204.)Thesecommenterssuggested ^ thatitwouldbemorelogicalandmoreconsistentwiththe   natureofthe8hourstandardforEPAinsteadtof  g f  g translate h thelowest1hourdesignvaluethresholdinTable1intoan b approximate8hourequivalent.(Theoriginaltranslation !  tableweproposedappearsat68FR32812(June2,2003).) "l" Theypointtotherecordintherulemakingwhichestablished f$$ the8hourNAAQSandsuggestthattheapproximate8hour && equivalentofthe0.12f  g Ԁppm1hourNAAQSis0.090ppm.[See, 'p!( forinstance,statementinthirdcolumn,sectionDof62FR j)#* 38858(July18,1997).]Theyrecommendthatratherthan +$, translatingthelowerboundformarginalareasinTable1_of ,t&. section181to0.080_ppm_Ԁor0.085_ppm_,EPAshouldstartit N at0.090_ppm_Ԁor0.091_ppm_,whichtheybelievereflectsthe  8hour equivalentofthe1hour_NAAQS_.Thus,this  X approachwouldresultin8hour_nonattainment_Ԁareaswith R  designvalueslessthanthatlowerboundbeingcoveredunder   subpart1.Thisapproach,unlikeourJune2,2003proposal, \  wouldresultinallsubpart1areashaving8hourdesign V  values(anindicationofthemagnitudeoftheozoneproblem)   thatarelowerthananyareacoveredundersubpart2. `   ` Placeallareaswithadesignvalueequivalentto Z   moderateundersubpart2.TheAmericanLungAssociation  (docketdocumentOAR200300790111)suggestedthatunder d Option2,allareaswithan8hourdesignvalueequivalent ^ tomoderateoraboveshouldbeclassifiedundersubpart2.   Thus,anareathatismeetingthe1hourstandardthatwould h havebeenclassifiedundersubpart1underEPAsOption2, b basedonits8hourdesignvalue,wouldinsteadbesubject !  tosubpart2ifits8hourdesignvalueisequivalenttoor "l" greaterthanthedesignvalueforamoderateareaunder f$$ Table1ofsection181asmodifiedtoreflect8hourdesign && values.#X.XXFX.c#"X.XXX.Thisapproachwouldeliminatemuchoftheinequity 'p!( that_commenters_Ԁbelievedcouldresultifareasclassified j)#* undersubpart1havemoresignificant8hourairquality +$, problemsthanareasclassifiedundersubpart2.#X.XX"X.c#YFX.XXX.?Ԁ#X.XXFX.#FX.XXX. ? ,t&. ЀEstablishclassificationsthatbetterreflectanareas N 8hourproblem. Avarietyof_commenters_Ԁwereconcernedthat  EPAsclassificationschemeplacestoomanyareasinthe  X lowerclassifications.0x000 v#  6      ׀The_commenters_Ԁstatedthatthe R  classificationoptionsleadtoclassificationsforsome   areasthatdonotreflectthesignificanceofthe8hour \  probleminthoseareasanddonotreflectthetimeneeded V  forthoseareastoattain.(See,e.g.,TheAmerican   PetroleumInstitute(API)docketdocumentOAR20030079 `  0281)f  g f  g .#X.XXFX.B#FX.XXX.Ԁf  g ԀTheyprovidedseveralsuggestionsforestablishinga Z  classificationschemethatwouldclassifyareasinaway  thatbetterreflectstheirairqualityproblem.f  g Ԁf  g ԀAPI d provided3optionswhileother_commenters_Ԁsuggested ^ alternativessimilartooneormoreofthealternatives   suggestedbyAPI.(Seee.g.,_ExxonMobile_ԀRefining&Supply h docketdocumentOAR200300790212;CleanAirTaskForce0<00<0 v#  7       b #X.XXFX.x#FX.XXX.docketdocumentOAR200300790215;AmericanChemistry !  Council,docketdocumentOAR200300790217f  g f  g .)f  g  "l"  ` APIssuggestedalternativesareasfollows: f$$ Oa    Yc  YcJ"0 `   Maintaina_rebuttable_Ԁpresumptionthatanareas1hour N classificationwouldberetainedunderthe8hour  standardifthe1hourclassificationwashigherthan  X the8hourclassification.YcJe݌R ` (#` (# Ќ  Yc  Yc"0 `   Translatetheclassificationtableusingonlyonehalf   thepercentageabovethestandardthateachstatutory \  classificationthreshold(or_cutpoint_)represents.0000 v#  8      ׀ V  (ThesepercentagesareshowninTable2oftheproposed   rule,68FRat32812,andwerethebasisfor `  translatingthe1hourozonevaluesinTable1of Z  section181oftheCAAinto8hourozonevalues.)f  g f  g For  furtherdescription,seep.13ofdocketdocumentOAR d 200300790281.f  g Yc ݌^` (#` (# Ќ  Yc  Yc"0 `   Useadistributionofclassificationsthatmirrorsmore   closelythedistributionofareasintheoriginal1991 h classifications.YcĒ݌b` (#` (# Ќ  #X.XXFX.ʋ#X.XXX. ` Whileeachofthesealternativeswouldresultinmore !  areasbeingplacedinhigherclassifications,EPAbelieves "l" thatthesecondalternativewouldmorelikelyresultin N classificationsthatbetterreflectanareas8hourozone  problem.  X 3.Alternativeapproachesforcomment. R   ` Basedonthesecomments,wearereopeningthecomment   periodforconsiderationoftwoalternativeapproachesfor \  classifyingareas.Thefirst3one,34alternativeapproach,A45A5lternativeA,would V  translatetheclassificationtableto8hourvalues   beginningwithan8hourdesignvaluethat6,totheextent `  possible,677wouldbeequivalenttothe1hourdesignvalueof Z  0.121_ppm_.Thiscouldbethevaluesuggestedinthecomment  (0.091)orsomeothervaluedetermineduponfurtheranalysis d tobeequivalent.TheEPAisintheprocessofconducting ^ additionalanalysisandwillbeplacingtheresultsofthat   analysisinthedocketwithinaweekofpublicationofthis h notice,whereitwillbeavailabletoanyoneinterestedin b reviewingit.Thisapproachcouldthenbecombinedwiththe !  suggestionoftranslatingtheclassificationtableforthe "l" remainingthresholdsusingonehalfofthepercentageabove f$$ thestandardwhicheachoftheclassificationthresholds && represents.Thisalternativeapproachwouldaddressthetwo 'p!( keyconcernsidentifiedbymany_commenters_:1)ensuringthat j)#* areasclassifiedundersubpart1havealesssignificant +$, ozoneproblemthanareasclassifiedundersubpart2;and2) ,t&. shiftingareassubjecttosubpart2intohigher N classificationsthatbetterreflecttheir8hourproblemand  thetimeitwilltakethemtoattain.  X  ` Thesecondalternativeapproach,AlternativeB,would R  addresstheissuesofequitybetweensubpart1andsubpart2   areaswithastructurethatisclosertothatofourJune2, \  2003proposal.Inordertoprovidesufficienttimefor V  attainment,andsimilartoAlternativeAabove,wewould   reducetherangeofdesignvaluesthatcomprisea `  classification(e.g.,therangeofdesignvaluesfor Z  marginalareasunderTable1ofsection181is0.121upto  0.138,therangeformoderateareasis0.138upto0.160and d soon).Underthismodifiedoption2approach ^  ` Areaswith1-hourozonedesignvaluesof0.121_ppm_Ԁor   greaterwouldbecoveredundersubpart2andwouldbe h classifiedwitharevisedclassificationtablereflecting b the8hourozone_NAAQS_Ԁandstartingat0.085_ppm_.Therange !  foreachclassificationwouldbedeterminedbyusing50 "l" percentoftherangeinTable1ofsection181.08_888000 v#  9      _ f$$  ` Areasmeetingbothofthefollowingcriteriawouldalso N becoveredundersubpart2:   ` ! 1-hourdesignvaluelessthan0.121_ppm_Ԁand  X  ` ! 8-hourdesignvaluerepresentingaclassification R  thresholdofareasthathaverelativelyhighmagnitudeof   an8-hourozoneproblem,forexample0.091_ppm_Ԁorgreater. \  (0.091isthelowerthresholdformoderateareas.) V   ` Allotherareaswitha1-hourdesignvalueoflessthan   0.121_ppm_Ԁwouldbecoveredundersubpart1. `  Thisapproachwould1significantlyreducethenumberofareas Z  undersubpart1thathavean8hourdesignvaluegreater  thananareaundersubpart2,butnottotheextent1211minimizethedegreeofinequitybetween ^ subpart1andsubpart2areascomparedtoOption2inthe N June2,2003proposal,butnottotheextent2of d AlternativeAabove.Inaddition,itwouldplaceseveral ^ areasinhigherclassifications,betterreflectingthe N areasairqualityproblemsandthetimetheareasneedto  attainthe8hourstandard.  X  ` EffectsofAlternativesAandB: R   ` Table1belowillustrateshowaclassificationtable   (thatwouldapplyinplaceofTable1insection181ofthe \  CAA)couldbestructuredforAlternativesAandB.Columns V  AthroughEappearedintheJune2,2003proposedrule.   ColumnFpresents50percentofthepercentagesofcolumnD. `  ColumnsGandHpresenttheclassificationthresholdsthat Z  couldapplyforAlternativesAandB.   ` TheJune2,2003proposedruleusedhypothetical d _nonattainment_Ԁareasforevaluationofdifferent ^ classificationapproaches.Theseweredocumentedinthe   reportcitedintheJune2,2003notice/r/// v#  10      ׀andreliedonair h qualitydataprimarilyfromthe3yearperiod1998to2000. b #X.XXX.#FX.XXX.Tocomparetheeffectsofthedifferingalternatives,we !  haveupdated8hourdesignvaluesbasedonairqualitydata "l" from2000to2002.Wehavedevelopedalistofhypothetical f$$ areasusingthe2000to2002datafollowingthesame N procedurefordefiningthemaswedidfortheproposal.#X.XXFX.#FX.XXX./p/// v#  11      ׀  Thesamecautionarystatementsthatappliedtotheoriginal  X listapplytothislist.#X.XXFX.#X.XXX. R   ` #X.XXX.ٰ#X.XXX.Table2belowprovidesacomparisonbetweenour   proposedoption2(withouttheincentivefeature)(rowA) \  andAlternativesAandB(rowsBandCrespectively);rowD V  providesforreferencethedistributionoftheoriginalset   ofclassificationsof1hour_nonattainment_Ԁareasin1991. `  Itshouldbenotedthatundereitheralternativeapproach, Z  comparedwithourJune2,2003preferredapproach,fewer  areaswouldbecoveredundersubpart1.#X.XXX.<#X.XXX. d OtherPossibleIssues: ^  ` 1hourThresholdtoDistinguishBetweenSubpart1and   Subpart2Coverage h  ` InourJune2,2003,proposal,classificationOption2 b reliedonthelowest1hourdesignvalueintheCleanAir !  Actsclassificationtabletodeterminewhichareaswere "l" requiredtobecoveredundersubpart2,viz.,0.121_ppm_. f$$ Underourlongstandingroundingconventions,valuesbetween N 0.121and0.124inclusiverounddownto0.12,whichisnot  an_exceedance_Ԁofthe1hourstandard.Several_commenters_//// v#  12        X notedthatthe0.121_ppm_Ԁvaluedoesnotrepresentan R  _exceedance_Ԁofthe1hourstandardduetoourrounding   conventions.Theyrecommendthat0.125_ppm_Ԁ(whichroundsto \  0.13_ppm_,an_exceedance_)beadoptedasthe_cutpoint_Ԁfor V  determiningwhetheranareamustbecoveredundersubpart2.   Thelikely_practical_Ԁeffectwouldbetoplaceafew `  additionalareasundersubpart1.Wearesolicitingcomment Z  onthissuggestion.   ` FivePercentAdjustmentprovision d  ` Ifwechangeourclassificationschemetohavea ^ narrowerrangeforeachclassification,wemayneedto   modifytheprovisionsforthe5percent reclassification h featureofsection181(a)(4)toreflectthatchange.The b apparentintentofCongresswastoallowStatestorequesta !  differentclassificationifanarea'sdesignvaluewas "l" within5percentofahigherorlowerclassification f$$ threshold.Thatwasbasedontheoriginalthresholdvalues, && whichwerecertainpercentagesabovethelevelofthe1-hour 'p!( standard.OurJune2,2003proposalwouldhaveretainedthe j)#* originalpercentagesfortheclassificationtablebasedon N 8-houraveragedesignvalues.Ifweadoptaclassification  tablebasedonlowerpercentagesabovethestandard,the  X adjustmentfeaturemighthavetobemodifiedtokeepthe R  samerelative"window"ofadjustment.Forinstance,using   100percentofthepercentagesbetweenthe1-hourdesign \  valuethresholds,wewouldusea5percentadjustment,but V  usingonly50percentofthosepercentages,wemaywantto   useonlya2.5percentadjustment,sincethethresholds `  themselvesarehalfaslarge. Z   ` Alternativestoa50percentadjustment   ` Asnotedabove,oneoptionforaddressingconcernsthat d ourproposedoption2maynothaveprovidedclassifications ^ highenoughtoprovideadequatetimeforsomeareasto   attainthe8hourstandardwastouseonlyhalf(50percent) h ofthepercentagesabovethe1hourstandardcalculatedfor b eachoftheclassificationthresholds.The_commenters_ !  rationaleforthe50percentadjustmentwasthatthe8hour "l" standardismorestringentthanthe1hourstandardandthat f$$ pastairqualitytrendsinformationprovidedbythe && _commenter_Ԁfor11metropolitanareasshowedthat,onaverage, 'p!( 8houraverageozoneconcentrationsdeclinedoverthe1998 j)#* 2002periodatabouthalftheratethat1houraverages +$, declined.Thus,wewouldexpectattainmentforareaswith ,t&. 8hourvaluesacertainpercentageabovethestandardto N takerelativelymoretimetoattainthe8hourstandardthan  areaswith1hourvaluesthesamepercentageabovethe1  X hourstandardwouldtaketoattainthe1hourstandard. R  However,wecoulduseanotherappropriatepercentagethat   maybebasedonhowsoonareasareexpectedtoattainthe8 \  hourstandardbasedonmeasuresthatarecurrentlyineffect V  orarescheduledtogointoeffect.EPAissoliciting   commentsonotherpossibleadjustmentsthatmayplaceareas `  inclassificationsthatbetterreflecttheir8hourair Z  qualityproblemandthetimeneededtoattain.   Authority: 42U.S.C.7408;42U.S.C.7410;42U.S.C.7501 d 7511f;42U.S.C.7601(a)(1). z, ________________________________  Dated: Z ̀ *!  ________________________________ "" JeffreyR._Holmstead_, $4$ AssistantAdministratorforAirandRadiation .&& #X.XXX.#X.XXX.  '!( TRP$'3 Letter LandscapeX3' Letter'3 Letter Landscape3'T#X.XXX.I#5XX.$ 5*djddd Xdd Xdd X..,b , , , ,q , , ,+  >[[[[+NN >#$X9 X $##X.X X$X9#X.XXX.TABLE1!ALTERNATIVECLASSIFICATIONS ^[[[K/^"   [[[[ ^TABLE1OFSUBPART21HOUROZONECLASSIFICATIONTABLE ^[[[K/X "   [[[ ^TRANSLATIONTO8HOURDESIGNVALUES X[[G/R"   [[[ XA =[[,!L "[[ =B =[[,!L "[[ =C =[[,!L "[[ =D =[[,!L "[[ =E =[[,!L "[[ =F =[[,!L  "[[ =G ?[[[,!L  "[[ ?H L[[;,L  "   [[[ LArea F   class +[[0  [[ + 4[[#F [[ 4CAA F  design 0  value   threshol   ds(1   hour  ozone t  _ppm_) =[[,!^ [[ =Percent F  above1 0  hour   ozone   _NAAQS_ 4[[#! [[ 4Translated8 F  hourdesign 0  value   thresholds   (_ppm_Ԁozone)    usingColD ! (June2,2003 t " proposal)#X.XXX.<#X.XXX. +[[^ #[[ +50%of F $ col.D +[[0 %[[ +Translated F & 8hour 0 ' designvalue  ( thresholds  ) (_ppm_Ԁozone)  * w/50%ofCol + Dstarting t , with0.091*#X.XXX.t#X.XXX. -[[[^ -[[ -Translated8 F . hourdesign 0 / value  0 thresholds  1 (_ppm_Ԁozone)  2 w/50%ofColD 3 startingwith t 4 0.085#X.XXX.2#X.XXX.**#X.XXX.#X.XXX. L[[;#^ 5   [[[ LMarginal 4[[#X 6[[ 4from W[[FX 7[[ `"?0.121`"?W0.121 _[[NCX 83 `"?0.121 `"?[[ _ =[[,!X 93[[ =0.085 =[[,!X :3[[ = =[[,!X ;3[[ =0.091 ?[[[,!X <3[[ ?0.085 U[[D,X =3   [[[ U =[[,!R >3[[ =  upto `[[O!R ?[[ Dl?0.138Dl?`0.138 _[[NCR @3 Dl?0.138 Dl?[[ _15 =[[,!R A3[[ =0.092 =[[,!R B3[[ =7.5 =[[,!R C3[[ =0.097 b[[[[O!R D3[[ K?0.091K?b0.091 w[[fNR E3 K?0.091   K?[[[[ wModerate 4[[#L F[[ 4from W[[FL G[[ Dl?0.138Dl?W0.138 _[[NCL H3 Dl?0.138 Dl?[[ _15 =[[,!L I3[[ =0.092 =[[,!L J3[[ =7.5 =[[,!L K3[[ =0.097 ?[[[,!L L3[[ ?0.091 U[[D,L M3   [[[ U =[[,!FN3[[ =  upto _[[N!FO[[ {Gz?0.16{Gz?_0.16 ^[[MBFP3 {Gz?0.16 {Gz?[[ ^33.333 =[[,!FQ3[[ =0.107 =[[,!FR3[[ =16.6665 =[[,!FS3[[ =0.105 ?[[[,!FT3[[ ?0.099< U[[D,FU3   [[[ U<< U[[D,FU3   [[[ U<Serious 4[[#@V[[ 4from V[[E@W[[ {Gz?0.16{Gz?V0.16 ^[[MB@X3 {Gz?0.16 {Gz?[[ ^33.333 =[[,!@Y3[[ =0.107 =[[,!@Z3[[ =16.6665 =[[,!@[3[[ =0.105 ?[[[,!@\3[[ ?0.099 U[[D,@]3   [[[ U =[[,!:^3[[ =  upto _[[N!:_[[  ףp= ?0.18 ףp= ?_0.18 ^[[MB:`3  ףp= ?0.18  ףp= ?[[ ^50 `[[O!:a3[[ Q?0.120Q?`0.120 _[[NC:b3 Q?0.120 Q?[[ _25 =[[,!:c3[[ =0.113 ?[[[,!:d3[[ ?0.106 U[[D,:e3   [[[ USevere15 4[[#4f[[ 4from V[[E4g[[  ףp= ?0.18 ףp= ?V0.18 ^[[MB4h3  ףp= ?0.18  ףp= ?[[ ^50 `[[O!4i3[[ Q?0.120Q?`0.120 _[[NC4j3 Q?0.120 Q?[[ _25 =[[,!4k3[[ =0.113 ?[[[,!4l3[[ ?0.106 U[[D,4m3   [[[ U =[[,!|.n3[[ =  upto _[[N!|.o[[ RQ?0.19RQ?_0.19 ^[[MB|.p3 RQ?0.19 RQ?[[ ^58.333 =[[,!|.q3[[ =0.127 =[[,!|.r3[[ =29.1665 =[[,!|.s3[[ =0.116 ?[[[,!|.t3[[ ?0.110 U[[D,|.u3   [[[ USevere17 4[[#v(v[[ 4from V[[Ev(w[[ RQ?0.19RQ?V0.19 ^[[MBv(x3 RQ?0.19 RQ?[[ ^58.333 =[[,!v(y3[[ =0.127 =[[,!v(z3[[ =29.1665 =[[,!v({3[[ =0.116 ?[[[,!v(|3[[ ?0.110 U[[D,v(}3   [[[ U =[[,!p"~3[[ =  upto =[[,!p"[[ =0.28 =[[,!p"3[[ =133.333 =[[,!p"3[[ =0.187 =[[,!p"3[[ =66.6665 =[[,!p"3[[ =0.150 ?[[[,!p"3[[ ?0.142 U[[D,p"3   [[[ UExtreme 4[[#j[[ 4equal j toor T above V[[E>[[ Q?0.28Q?V0.28 ^[[MBj3 Q?0.28 Q?[[ ^133.333 =[[,!j3[[ =0.187 =[[,!j3[[ =66.6665 =[[,!j3[[ =0.150 b[[[O!j3[[ V-?0.142V-?b0.142 t[[[aNj3 V-?0.142   V-?[[[ t*0.09+(0.09X(colF/100)) 5      =   **0.085+(0.085X(colF/100))#X.XXX.#X.XXX.6,*8    [[[ 6#X.XXX.#5XX.  2 @^D  55  *_cXddb b   q q  dj.., , , , ,s ,<, , ,9+  >[[[[+NN   >TABLE2CLASSIFICATIONOPTIONS @  @  @  @  @  @  @  @ ^[[[K/Z "  [[[[    ^COUNTSOFHYPOTHETICAL_NONATTAINMENT_ԀAREAS(20002002data) @  @  @ X[[G/*"  [[[   X A[[0!3[[ A  Subpart2 B[[[[/$#[[ B}Subpart1 ?[[[[,!"[[[[ ? W[[[D,"  [[[[  W =[[,!|3[[[ =  Extreme =[[,!|[[ =Severe17 4[[#| [[ 4Severe15 4[[#| [[ 4Serious 4[[#| [[ 4Moderate 4[[#| [[ 4Marginal 4[[#| [[ 4 6[[[#|[[ 6  Total Y[[^D,|  [[[ x Y A[[^,! L3[[^ A A[[^,! L3[[^ A A[[^,! L"[[^ A A[[^,! L"[[^ A A[[^,! L"[[^ A A[[^,! L"[[^ A A[[^,! L"[[^ A A[[[^,! L"[[^ A L[[;, L" x [[[^  LOption2asproposed   6/2/03#55#55 H[[[7 [[ # H0 P[[[?4 " # [[[ P1 =[[[,! "[[[ =0 =[[[,! "[[[ =4 =[[[,! "[[[ =21 =[[[,! "[[[ =11 =[[[,!  "[[[ =64 `[[[[M! !"[[[ @Y@101@Y@`101 y[[^dL "" @Y@101  @Y@[[[[ x y A[[^,! X#3[[^ A A[[^,! X$"[[^ A A[[^,! X%"[[^ A A[[^,! X&"[[^ A A[[^,! X'"[[^ A A[[^,! X("[[^ A A[[^,! X)"[[^ A A[[[^,! X*"[[^ A L[[;, X+" x [[[^  LAlternativeA(8hour  , onlydesignvalue  - option) H[[[7 X.[[ # H0 P[[[?4 /" # [[[ P1 =[[[,! 0"[[[ =2 =[[[,! 1"[[[ =5 =[[[,! 2"[[[ =12 =[[[,! 3"[[[ =26 =[[[,! 4"[[[ =55 ?[[[[,! 5"[[[ ?101 Y[[^D, 6"  [[[[ x Y A[[^,!v(73[[^ A A[[^,!v(8"[[^ A A[[^,!v(9"[[^ A A[[^,!v(:"[[^ A A[[^,!v(;"[[^ A A[[^,!v(<"[[^ A A[[^,!v(="[[^ A A[[[^,!v(>"[[^ A L[[;,v(?" x [[[^  LAlternativeB @ (ModifiedOption2 4[[[#d A[[ 4#X.X5N#5XX.0 =[[[,!B"[[[ =#X.X5 #5XX.3 =[[[,!C"[[[ =#X.X5T #5XX.4 =[[[,!D"[[[ =#X.X5 #5XX.9 =[[[,!E"[[[ =#X.X5T#5XX.30 =[[[,!F"[[[ =#X.X5#5XX.10 =[[[,!G"[[[ =#X.X5U#5XX.45 ?[[[[,!H"[[[ ?#X.X5#5XX.101 Y[[^D,I"  [[[[ x Y A[[^,!4 J3[[^ A A[[^,!4 K3[[^ A A[[^,!4 L"[[^ A A[[^,!4 M"[[^ A A[[^,!4 N"[[^ A A[[^,!4 O"[[^ A A[[^,!4 P"[[^ A A[[[^,!4 Q"[[^ A L[[;,4 R" x [[[^  LORIGINAL1991  S CLASSIFICATIONS* 4[[#p T[[ 4  1 \[[K! U [[  @5@\5 z[[i? V"  @5 @[[  @7@z7 {[[j? W"  @7 @[[  *@13*@{13 |[[k@ X"  *@13 *@[[  >@30>@|30 |[[k@ Y"  >@30 >@[[  E@43E@|43 {[[j@ Z"  E@43 E@[[  @2@{2 ~[[[k? ["  @2 @[[ @Y@101@Y@~101  \   y[[^dLp ] @Y@101  @Y@[[[  y A[[^,!@ ^3[[^ A A[[^,!@ _3[[^ A A[[^,!@ `"[[^ A A[[^,!@ a"[[^ A A[[^,!@ b"[[^ A A[[^,!@ c"[[^ A A[[^,!@ d"[[^ A A[[[^,!@ e"[[^ A  R[[[[?,@ f  [[[^  R*Doesnotaccountforsection185Aorincompletedataareas#55#$ 56,*^ g  [[[[  6#5 $G#L#X.X5Y#u?