S TEVE 8 ULL.OC I < G OVERNOR

December 17 , 20 l 5
S h au n McGrat h Regiona l Adm ini strator 

### OFFI CE OF THE GOVERNOR S TA TE OF' MO NTANA

U nited State s E n v iromn e nta l Protection Agency Region VIII , 8P

- AR 15 95 Wynkoop Str ee t Denver , Co lorado 80202

- I 12 9 R E : Montana State Im p lementati on Pl an Ac t io n s De a r Mr. McG r a th: ANGELA M c L EAN L T
. G OVERNOR

Fo r yo u r cons id e rati o n , thi s s ubmittal contains proposed act ions regardin g th e Montana State Impl e m e nta t io n P lan (SIP) fo r protec ti o n of the Na ti o n a l Ambient Air Quality Standards (NAAQS). T h e Montana D e partment of Env iromenta l Quality (department) h as worked c lo se l y wit h the E n v i ronmenta l Protect ion Agency (EPA) Region 8 staff i n the deve l o pm e nt of t he propo se d SIP ac ti o n s. Three ac ti o n s re quiring consideration includ e: I. 20 1 2 Revi sed Annua l Fi n e Part i culate Matter (PM 2 . 5 ) NAAQS SIP Ce rtific ation 2
. C l ea n Air Act (CAA) Section 1 28 Board of E n v iromn e nta l Review Confl ict of Inte rest Provi s ion s 3. Co mmitment to Revi se Preven ti on of Significant Dete ri orat ion ( PSD ) Permittin g Provisions O n December 1 2, 20 1 2, the EPA p ro mu lga te d fin a l rev is ion s to th e NAAQS for PM 2. 5 . Acco rding to th e a ppli cab le re quireme nt s of t h e CAA co nta in ed in 42 U.S.C. §74 1 0(a)( 1 ) a nd (2), w ithin three yea r s after promulgation of a ne w or rev ised NAA QS , eac h s tat e s h a ll adop t and s ubmit to E P A a S IP th a t pro v ide s for impl e m e ntation , m ainte n ance , a nd e nforce m e nt of th e NAA QS wi th i n the s tate , or ce rtif y adeq u acy of th e exis tin g SIP fo r thi s purp ose. T hi s sub mittal inc lu des an a ttachm e nt providin g a n adequacy de m onstratio n of Mo nt ana ' s co mpli a nc e w ith t h e SIP in frastruct ure element s set fo rt h a t 42 U
. S
. C
. §74 1 O(a)(2)(A) throu g h (M)
. T h e information contai n ed in the attac hm e nt was noticed fo r a 30 -d ay public comment p erio d, w hich e nd e d o n A u g u s t 31, 2015
. No comments were received during the pub li c comment p er iod.

S T ATE C AP I TOL • P
. O
. B ox 200 8 01 • H E L ENA, M ONTANA 596 2 0

-0 8 01 TEL E PHON E : 406- 44 4-3111 • F AX : 406 -444 -5 529 • W EBSITE: WWW.MT
. GOVDecember 17, 2015 Sha un McGrath , EPA Region 8 Page2of2 In 2013 , the EPA id en tifi e d a problem w ith Mo nt ana's S IP specific to th e requ irements of Sect ion 1 28 of t h e CAA. Sectio n 1 28 pro v ides that S IP s mu s t contain requirements that any board that approves pe rmi ts o r e n forcement orders have a m ajor ity of m embers that " represent the pub lic int e rest and do no t derive any s ignificant po rti o n of their in come from p erso n s s ubj ect to pe rm i ts or enforceme nt o rd ers ," and that tho se membe r s s hall disclose any potential conflicts o f interest. Becau se the Board of Envirorunenta l R ev iew (boa rd ) has s u c h authority, compl iance w it h Section 1 28 of the CAA is required. Th e proposed amendments to the Admi ni str at i ve Rules of Montana (A RM) inc lude definit i ons , conflict of inte rest req uirements for member s of t h e board , and the process by which th e board membe r s w ill re port any possible confl icts o f intere st. f-or you r co n ven ie nc e, the Montana Secre ta ry of S tate publi s he s codified rules and you may view the se rules in codified form on the Sec retary of State's website: www.mtrules.org. The information contai ned in t he at tachmen t and proposed for SIP approval was noticed for a 30-day public com m ent per io d , w hich e nded November 27 , 20 1 5. No comme nts we re received. Last ly, on A pri l 10, 20 15 , t h e depa rtm en t s ub m itted a rev i sed s i gnifican t monito r in g co n ce ntrat ion for PM 2 . 5 fo r inclu s io n in th e SI P to th e E PA. In that s ubmitta l th e department neglected to remo ve th e phrase " 24 -h ou r average" fro m ARM 1 7.8.8 l 8(7)(a)(iii)
. E P A ha s ind i cated that thi s over s ight needs to be addressed prior to approva l of Mo nta n a's infrastructure SIP fo r 2008 lead and ozone, a nd 2010 nitro ge n diox ide and sulfu r dioxide. The dep art m ent acknowledges ARM 17 .8.818 , Review of Major Stationa ry Sou rc es and Major Modifications

- Source Applicabi lity and Exe m ptions, s h ou ld be revised. Montana commits to adopt and s ubmit sp ec ific rev i s ions , s p ec ilically to remove t h e ph rase "24

- hour average" in ARM l 7.8.8 18(7)(a)( ii i) , w ithin one yea r of EPA's final actio n on th ese i nfrastructure s ubm ittal s . Thank yo u for your co n s id eration of these actions. 

### If you have any questions, please contact A nn ette W illi ams, Tech ni ca l Support Services Pro gram Manager , by telephone at (406) 444-528 1 o r by emai l at anncttew @ mt.g ov . S in cere l y,

STEVE BULLOCK Governor CC: Carl Dal y, Air Program Director, USE PA Region 8 Ja s ly n Dobra hn er , USEPA Region 8 To m Li ve r s, D irec to r, Montana D epa rt men t of Env ironm ental Qua lity Da v id L. K le mp , A ir Quality Bu reau Chief , Montana D epart m e nt of Environmenta l Qua li ty