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# OAR Box 1790 Prepped byKeeia Richards



### Document

Number: 

# 234 ) ll-F-2 4 Docket Number: 

# A-90-3 7

Printed 10/31/200812:43:17

PM Sheet 234 of 250S&N T 6Y:ASST . SECRETAR YFW P : 3-21-9 5 : 1:02PM: INTERIORDEPARTMENT ^ 

## Unite dState s Departmen t ofth eInterio r OFFIC E OF T IIF . S L ORE ' I'AR Y Washington , H. C 20'.>4f ) TRANSMISSIO NNOTIC E Thi s messag e i a electronicall ytransmitte d un a Xerox , 70 3 Facsimil e machine . P. 2 91 9 541 5509: * 1 / 5 

## A-90-3 7

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Regulatio n [NOTE : Correspondin gchange s t o Par t5 2shoul dals o b eikde. ] *rart(5l ) P . 8 , Definitions : Jjc-sfaieJ ya^ui*-xt-tiou*-/_»-Ui ^ Ad dto-_n do f

entr y"(40 ) Ai rQualit yRelate dValue" : *Tvwindin g rtion riilnn r•minr iitn lriti iM Mj iii nimjjjniT ra" Inseif

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pag e9 afte r"clas s I. " )M B mtq ]

A i Qualit y rjilet e" a /alue " a t »r-aa- , -or ^ *Par t 51 , p . 9 , Definitions : Delet e th e "an " i n entr y"(41 ) Advers e Impac t o n a n Relate dValue " an d ad d a n "(s)' \ afte r "Value." , specific " <m d substitut e "on e o r more" , ad d a n "s " t o ' en do f presen t tex t an d add : "irr-a•- f FederalT " Cluao

- ~ i impai r ...tJia_.StXUC,T.Urg-<tilC'! ' f wr t i oninr^Q l a n .ggge^ygtoro ^ far t 5 1 [an d ad d t o Tar t 52] , wherevp r advers e impact , nl : o f a n advere e impact , o r monitorin g impact s wit hregar dt < a t issue , consultatio nwit hth e affecte dFL Mshal l b P r s quired."/ / / [o r "implied " i f "required " i s to o strnng j
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- • -JJ jOTEjyTT^norigreeinen t n n thi s o r similar , centralize dlo d consultatio nrequirement , the nrefe r t o mark-u p fo r place s i n regulatio nwher e consultatio ni s desirable . L i definin g ['affected FLM,_

_evp ni t mean s a cuLuf f i n km , 1 cutof f re^cnntormit yregs . Throughou t tigatio n AQRV s 

# TJ. itio nfo r ilndividua l a.'& avoi d c c 10 0 k

m Par t 51 , p . 11 , Definitions : O n(47)(ii ) ad d "o r nitroge noxides " afte r "volati l comEOynds. " _5OTEX ) Dil l T . previousl yagree dt o tni s change , bu t : discusse dwit hRTP . J 

# I organi c wa c no t Pdi t 51 , p . 13 , "(iii) " r e BAC T Chang e "may " t o "shall. " P . 1.1 , delet e sectiu n" (iv) " i n entiret yo r chang e "iateH " i n lin e 3 t o "eaul i NOTETYB^ 1 1 T ^ ) thniigh t thes e change s wer e reasonable , fi|j t w e dir t wit hRTP . Poin t io , EP Ashoul dno t not dr s eval./discussio no f BAC T befor e clos e o f publi c commen t •Par t 51 , p . lo , "(o)" : Uelet e (o)(3 ) andrevio c (o ) (l ) o f currp.n t reg . a s follows : "Th e owne r o r operato r shal i provid e a n analysi s o f th e impairmen t o f visibility , soils , an d vegetatio nbyth e propose dsi t >., a s wel l a s an'analysi s o f AQRV e (a s define di n (4U ) above) , wic hwoul d occu r a e a resul t o f th e sourc e o r modificatio nan i genera l commercial , residential , industrial , an d othe r growt hassociate d wit hLh e sourc e o r modification . Concernin g an y. npact s o n vegetatio nno t associate dwit ha n AQRV , a s define d i n (40 ) , th e owne r o r operato r nee dnul . provid e a n analysi s o f veg«t.a\Lo nhavin g n o significan t ecologica l value. " 

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# 0 [Note : Thi s propose d rewrit e trie s t o dra wa distinctio i AQRV s o n fed . land c an d othe r resources , t o hel p addres s concer n ahou t "nor . makin g applicant s d o somethin g ne v determ . o f "n o sign . eco . value " woul d b e mad e by authorit yan d i 3 irrelevan t t o Clas s I and I T areas. ] p i 1

~~ \ jPar t bl , p . 17, : (2 ) Federa l Lan d Mange r Responsibilit y (B) , and (C ) unde r that , and revis e 91 9 54 1 5509: S 3 /

Delet e (ii ) an d (A ) follows : "Th e federa l Lan d Manager , throug hth e permittin g authoftty , EP A Bulleti n Board , o r directly , shal l mak e availablp . t o th e a:?licant , whos e emission s ma yaffec t a federa l Clas s I are a any informatio n concernin g AQRV s o f tha t Clas s I area. 1 

# G "X ^Par t 51 , p . 1 8 and p . 1 <., ' demonstratio n o f advers e iiuac t and denial , an d p . Thes e section s 21-2 2 (q ) publi c participation :

nee d t o b e rewritte n t o clarif y EPA ' s i Mten t uat e betwee n EPA' S Th e emittin g
(iii ) a s
relevan t

an d th e provid e a consistent , realisti c framewor k t o mak e an d e v FLM' s advers e impac t determination . Th e firs t headin g tyhould b e publi c participation , and describ e requirement s fo r notifyin g th e publi c a s t o state' s preliminar y determinatio n summary . Tha i nutificatio n shoul d rela > anyFL M concern s presente d t o date , includin g an yFL Mpreli madvers e impac t determination , and mak e FT. Mcomment s available . Onc e th e FT. Mha s al l th e info . nee . t o bat e advers e impac t determi r ;itio n on , whic hwa yno t occu r unti l afte r ctat e prepare s it s preliminar y determinatio n summary , the n i f FT. Mi s incline d t o ma ) e suc ha dptermination , th e FL Mand permittin g authorit yshoul d consul t o n th e determination , relevan t analyses , and mitigatio n stratnglns . An ywriting s betwee n FL Mand stat e permittin g authorit yo n thi s consultatio n an d resolutio n (i.e. , stat e ha s burde r t o pu t rejectio n o f FLM' s determin. ' i n a rational e writte n form ) fphoul d g o i n th e publi c docket .

Preambl e *P . 314 , Inser t determination" : firs t ful l para. , afte r "adye r Th e NS R Clas s I Are a Coordinatio n Subgrou p cam e up wit hth e followin g criteri a t o b e considere d b yth e permittin g a»:hority : jj** 0 Scientifi c basi s o f th e FLM' c advers e impac t deter mlation ; 5t(Fb J Existin g statu s o f pofpnf.iall yaffecte d clas s I areas!lan d thei r 

### XTftvs ; y^c ) Presenc e o f mitigatin g factors , suc ha s offsets ; jd ^ Permi t conditions , suc ha s pre - an d post-c o fetiuction litoring , wit hcontingen t correctiv e actio n plan ; \ (e ) Informa l mediatio n effort s durin g considp.ratio No t th e ' application ; (f ) Participatio n b yth e FL Mdurin g completenes s revie w / ^ 4g4--PuT5lrrc--smpp w«*"**
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abov ear eprobabl y mos t s e t ou t fo r FT.M' s benefit. ] 91 9 54 1 5509: 2 4/ 5

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an dstlDStitut e lo l louring : . . . „ 1 txlstin g Advers e Impact s Previousl yDocumente dfo r th e Clas s I Arp a Wher e th e FL Mha s previousl ypublicl ydocumente do r :ertifie d, existin g advers e impac t condition s a t a Clas s I area , o r ditermine d( • y> tha t on e o r mor e particula r propose dsource s woul d COBS . : Ltutefa nj ,,--T advers e impact , t-^a nAQK V a t a particula r Clas s I a i >a , tha t £l -yZ' informatio nshoul db e afforde d3_ubstant_ia l weigh t b yth e pirmittin g $••<' authority . Th e legislativ e histor yo f th « CA Ainstruct s t ^ "er r o n th e sid e o f protectin g tn e air-qualit yrelate dvalue s f generations. " S . Rep . No . 9*3-127 , 95t hCong. , le t Sess . 3 imp . t o

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W • •- ^ * , — — * • WW»» . Th e permittin g authorit yshoul dconside r tha t instructio n o f existin g condition s a t a particula r clas s I aiea . P . 329 , Se e JD' s Significan t Impac t Inse t

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new section , befor e * p . ru:*? , inser t D Clearinghouse" : Generi c Approache s t o Addres s An yAQR V Issu e I

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;s< I Th e NS R Subcommittee , Existin g Source s subgrou p discu s option s fo r addressin g specifi c AQR V degradatio ni n C l Th e grou p camp , t o consensu s o n th e nee dt o enforc e exi s requirin g SI P revision s i n case s wher e PS D incremen t e j hav e bee ndocumented . I n particular , th e grou p discus s t o enforc e existin g requirement s fo r permittin g aut h trac k incremen t consumptio ncumulativel yfo r al l sources , fo r EP Aguidanc e o n methodolog yfo r trackin g emission s cui u an dperiodicall yassp.ssin g incremen t consumptio nwa s r EP AWil l endeavo r t o piovid e suc hguidance . .a s ; ara . *P . 336 , inser t C , afte r "52.2i(o)(3), " delet e res t o f substitute : I nrecognizin g tha t Federa l Clas s I an d i i area s hav e AQfWs , whic h ar e mandate dunde r variou s statute s fo r preservatio nunimpaire d (e.g. , Organi c Act , Wildernes s Act) , EPAi s proposin g t o c las t sentenc e i n (o)(l ) o t bot hcurren t regulation s clarification s shoul dhel p ensur e tha t permi t applicant s al l potentia l impact s t o Clas s I an d(f l are a AQRVs^ ^ -y .



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severa l I areas . Ln g rule s reedance s th e nee d itie s t o Th e nee d latlvel y cognized .

r < Th e Existin g Source s Subgrou p als o discusse dsuppleiuentin : regulation s b yaddin g a trigge r fo r 3I P revisions , o r ev e o f regiona l implementatio nplans , t o addres s exist i impac t condition s fo r AQRV s a t Clas s I area s withi na stat e o r region . Althoug hFLM s an d environment s representative s pointe dou t th e merit s o f suc ha n a amelioratin g th e "existin g source s problem " fo r AQRVs , n t o f th e ful l grou p coul db e readie do n thi s option . l-A" h' I*
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# 4- NovemberT6 , 1994 , draft ; Inser t followin g paragrap ha t pag e329 . 91 9 54 1 5509: a 5/ 5

Althoug hthe FLM s (NPS/FWS ) agre e tha t th e us e significanc e level s wic hrespec t to Clas s I incrftme r ma y b e appropriat e i ncertai ncircumstances , believ e tha t thco c level s ahoul db e prope l conservativ e an

dconsisten t wit hth e methodol c originall y

use dto esr.ahlis hthe NAAQ S significa i level s ($&£. propose dsection s 51.166(b ) (23 ) (iv ) 52.21(h)(23 J(iv)) . Therefore , the MP S an dFW S developet^alteniatt^ve , significanc e level a b y takin g 1 rati o o f tn"_~TS£AQ S 'significanc e leve l t o th e NAAQ S multiplyin g tha t numbe r b y the respective Clas s increment . Revis e las r paragraphonpag e 33 1 a a follows : Th e EP A

request s publi c commen t o n4* # fffi!£

propound Clas s I incremen t significanc e levels , i nparticular , ch e EP A

request s commen t on\Wtta, th e lovc-li whic harc i fou r percen t o f the applicabl e Clas s incremen t leve l t&M en do f
<i f : B ttj^ y y
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## 4n d I

NOTK - I sugges t EP A als o ad da colum nt o •5 1 .166(b ) (23>(v ) an d52.21(b)(23 ) (v) ) tha t include s significanc e level s fo r comparison , o r els e pu t bot h number s i nch e preamble . NPS/FW S number s ar e a s follow i ih e

Pollutan t

Snlfu r Dioxid e (SO, )

Particulat e Matte r

(PM 10 ) Nitroge nDioxid e

(N0 2 ) Averagin g Tim e
Annua l 24-hou r 3-hou r Annua l 24-hou r Annua l NPS/FW S

Propose d Level s 0.0 3 0.0 7 0.4 8 0.0 8 0.2 7 0.0 3 ilectiou s

ec s o f