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# OAR Box 

# 1790 Prepped by Keeia Richards



## Document

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# 225 ) ll-F-1 4 Docket Number: 

# A-90-3 7

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REMARKS :

I F YO UHAV E AN Y PROBLEM S WIT H THI S FA X O R TROUBL E RECEIVIN GAFA X PLEAS E CAL L TH E INDIVIDUAL FRONWHO MYO UAR E RECEIVIN 6 TH E FAX . DENNIS , JOH N EADY , COLLETT E JOHNSTON . 6ARY KLIWINSKI , SHARO N MALKIN , KARE N HCCLELLAND , LINDSAY MILLER , ABB Y PECK , DEB8 Y 202-208-519 3 202-208-464 0 202-208-588 6 202-208-463 9 202-219-338 4 202-208-495 8 202-208-465 0 202-208-462 4 WALKER . BIL L 202-219-338 6 WATKINS . WIU A202-208-491 3 WILSON , RIT

A202-208-388 4



# U ^ ] AP? x:" • CIS3 3
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NS RPaokage , Propose dWPS/U8FW 8 Insert s t o 11/16/9 4 OMB Versio n Preambl e P . 314 , Inser t A , firs t ful l para. , afte r "advere e impac t determination" : Th e NS R Clas s I Are a Coordinatio n Subgrou p cam e u p wit hth e followin g criteri a t o b e considere d b yth e permittin g authority : (a ) Scip.nti.fi c basi s o f th e FLM' s advers e impac t determination ; (b ) Existin g statu s o f potentiall yaffecte d Clas s I area s and thei r AQRVe ; (c ) Presenc e o f mltiqatinyfactors , suc ha s offsets ; (d ) Permi t conditions , suc ha s pre - and post-constructio n monitoring , wit hcontingen t correctiv e actio n plan ; (e ) Informa l mediatio n effort s durin g consideratio n o f the . application ; (f ) Participatio n b yth e FL Mdurinycompletenes s review ; (q ) Publi c support/oppositio n t o th e permit ; and (h ) alternativ e siting . P . 315 , Inser t D , afte r (2 ) , deletin g existin g tev t an d substitut e following : Existin g Advers e Impact s Previousl yDocumente d fo r th e Clas s I Are a Wher e th e PL Mha s previousl ypublicl ydocumente d o r certifie d existin g advers e impac t condition c a t a Clas s I area , o r determine d tha t on e o r mor e particula r propose d source s woul d constitut e a n adversi e impac t t o a n AQRV a L a particula r Cla3 s I area , tha t informatio n shoul d b e afforde d substantia l weigh t h yth e permittin g authority . Th e legislativ e histor yo f th e CA Ainstruct s t o "er r o n th e sid e o f protectin g th e air-qualit yrelate d value s fo r futur e generations. " 6 . Rep . No . 95-127 , 95t hCong. , 1s t Sess . 3 6 (1977) . Th e permittin g authorit yshoul d conside r tha t instruction , i n ligh t o f existin qcondition s a t a particula r clas s I area . P . 336 , Tnser t C , afte r "52.21(o ) (3), " delet e res t o f para , and substitute : I n recognizin g tha t Federa l clas s I and l i area s hav e AQRVs , whic h ar e mandate d unde r variou s statute s fo r preservatio n unimpaire d (e.g. , Organi c Act , Wilderncc e Act) , EP Ai s proposin g t o delet e th e las t sentenc e i n (o)(i ) o f bot hcurren t requlatiuna . Thes e clarification s Shoul d hel p ensur e tha t permi t applicant s conside r al l potentia l impact s t o Clas s I and I I are a AQRVs . V. 343 , Inser t D , ne wsection , befor e "7 . Informatio n Clearinghouse" : Generi c Approache s t o Addres s An yAQRV Issu e Th e NS R Subcommittee , Existin g source s Subgrou p discusse d severa l option s fo r addressin g specifi c AQRV degradatio n i n Clas s I areas . Th e grou p cam e t o consensu s o n th e nee d t o enforc e existin g rule s requirin g ST P revision s i n case s wher e PS D incremen t cxceedancc c hav e bee n documented . I n particular , th e grou p discusse d th e nee dP. 4

t o enforc e existin g requirement s for permittin g authoritie s L o trac kincremen t consumptio ncumulativel y for al l sources . Th e nee d fo r EPA guidanc e o

nmethodology

for tracking emission s cumulativel y an dperiodicall y

assessing Incremen t consumptio nwa s recognized . EPA.wil l endeavo r t o provid e suchguidanc e Th e existin g Source s Subqroupals udiscusse dsupplementin g existin g regulation s b

y addin g a trigge r for SI P revisions , o r eve nadoptio n o f regiona l implementatio nplans , t o addres s existin g advers e Impac t condition s for AQRV s a t Clas s I area s withi na particula r atat e o r region . AlthoughPLM s an denvironmenta l grou p re.prp.Rentative s pointe dou t the merit s o f suc hanapproac hin amelioratin g th e "existing source s problem " for AQRVc , no consensu s o f th e ful l grou pcoul dbe reachedo nthi s option .