T « 7 ^ UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y

^ ;'«^bS»» /

REGIO N 8 99 9 18 TM STREET - SUIT E 20 0 DENVER , C O 80202-246 6 Phon e 800-227-891 7 http://www.epa.gov/region0 8 Ref : 8P-AR MEMORANDU M DATE : SUBJECT : Submissio nto Revision s to th e State Implementatio nPla nfor Montan afo

r Incorporatio nb

y Referenc e FROM : Regulatio nManagemen t Staf f EPA TO : Officeo f

th e Federal Registe r Pleas e addthi s documen t to th e "Montan aImplementatio nPlan' " file an dta b i t i nth e appropriat e sequence . 4 0 CF R par t 5 2 i s amende d t o rea d a s follows : PAR T 5 2 [AMENDED ] 1
. Th e authorit ycitatio n fo r Par t 5 2 continue s t o rea d a s follows :

Authority : 4 2 U.S.C . 740 1 e t seq . Subpar t BB'

- Montan a 2
. Sectio n 52.1 3 7 0 i s amende d b yaddin g paragrap h (c)(68 ) t o rea d a s follows : § 52.137 0 Identificatio n o f plan
.

+ • * • * * (c. ) * * * (69 ) Revision s t o th e Stat e Implementatio n Pla n whic h wer e submitte d byth e Stat e o f Montan a o n Januar y16 , 200 9 an d Ma y4 , 2009
. Th e revision s ar e t o th e Administrativ e Rule s o f Montana ; the ymalc e mino r editoria l an d grammatica l changes , updat e th e citation s an d reference s t o federa l law s and
. regulations , an d mak e othe r mino r change s t o confor mt o federa l regulations
. (i ) Incorporatio n b yreference
. (A ) Administrativ e Rule s o f Montan a (ARM) ' section s 17.8.10 2Incorporatio n by.Referenc e - - Publicatio n Dates , 17.8.30 1 Definitions , 17.8.90 1 Definitions , and 17.8.1007

- Baselin e fo r Determining Credit , fo r Emission s an

d Ai r Qualit yOffseits , effectiv e Octobe r 24 , 2008
. (B ) Administrativ e Rule s o f Montan a (ARM ) sectio n 17.8.30 8 Particulat e Matter , Airborne,•effectiv e Februar y13 , 2009
.AI R QUALIT Y17.8.10 2 17.8.10 2 INCORPORATIO N B YREFERENCE-PUBLICATIO N DATE S (1 ) Unles s expressl yprovide d otherwise , i n thi s chapte rwher e th e boar d has : (a ) adopte d a federa l regulatio n b yreference , th e referenc e i s t o th e Jul y1 , 2007 , editio n ofth e Cod e o f Federa l Regulation s (CFR) ; (b ) adopte d a sectio n o fth e Unite d State s Cod e (USC ) b yreference , th e referenc e I s t o th e 200 0 editio n ofth e US C an d Supplemen t V (2005) ; (c ) adopte d anothe rrul e o f th e departmen t o ro f anothe ragenc yo fth e stat e o f Montan a b yreference , th e referenc e i s t o th e Decembe r31 , 2007 , editio n o f th e Administrativ e Rule s o fMontan a (ARM)

. (2 ) Th e followin g subparts , o rportion s thereof , o f4 0 CF R Par t 60 , ar e exclude d fro m Incorporatio n b yreference : (a ) 4 0 CF R 60 , Subpar t CCCC , Standard s o f Performanc e fo rCommercia l an d Industria l Soli d Wast e Incineratio n Unit s fo rwhic h Constructio n I s Commence d Afte rNovembe r30 , 1999 , o rfo rwhic h Modificatio n o rReconstructio n I s Commence d o n o rAfte rJun e 1 , 200 1 (4 0 CF R 60.200 0 throug h 60.2265 , an d al l associate d appendice s an d tables) , a s vacate d Jun e 8 , 2007 , b yth e U.S

. Circui t Cour t o f Appeals , D.C

. Circuit , ruling

. (3 ) Th e followin g subparts , o rportion s thereof , o f 4 0 CF R Par t 6 3 ar e exclude d fro m incorporatio n b yreference : (a ) 4 0 CF R 63 , Subpar t JJJJJ , Nationa l Emissio n Standard s fo rHazardou s Ai rPollutant s fo rBric k an d Structura l Cla yProduct s Manufacturin g (4 0 CF R 63.838 0 throug h 63.8515 , an d al l associate d appendice s an d tables) , a s vacate d Marc h 13 , 2007 , b yth e U.S

. Circui t Cour t o f Appeals , D.C

. Circuit ; (b ) 4 0 CF R 63 , Subpar t KKKKK , Nationa l Emissio n Standard s fo rHazardou s Ai rPollutant s fo rCla yCeramic s Manufacturin g (4 0 CF R 63.853 0 throug h 63.8665 , an d al l associate d appendice s an d tables) , a s vacate d Marc h 13 , 2007 , b yth e U.S

. Circui t Cour t o f Appeals , D.C

. Circuit ; (c ) 4 0 CF R 63 , Subpar t DDDDD , Nationa l Emissio n Standard s fo rHazardou s Ai rPollutant s fo rIndustrial , Commercial , an d Institutiona l Boiler s an d Proces s Heater s (4 0 CF R 63.748 0 throug h 63.7575 , an d al l associate d appendice s an d tables) , a s vacate d Jun e 8 , 2007 , b yth e U.S

. Circui t Cour t o f Appeals , D.C

. Circuit ; (d ) portion s o f 4 0 CF R 63 , Subpar t DDDD , Nationa l Emissio n Standard s fo r Hazardou s Ai rPollutant s fo rPlywoo d an d Composit e Woo d Products , a s vacate d Jun e 19 , 2007 , b yth e U.S

. Circui t Cour t o fAppeals , D.C

. Circuit

. (History : 75-2
- 111 , MCA ; IMP , Titl e 75 , chapte r2 , MCA ; NEW , 199 6 MA R p . 1844 , Eff

. 7/4/96 ; TRANS , fro m DHES , 199 6 MA R p . 2285 ; AMD , 199 7 MA R p . 1581 , Eff

. 9/9/97 ; AMD

. 199 8 MA R p . 1725 , Eff

. 6/26/98 ; AMD

. 199 9 MA R p . 2250 , Eff

. 10/8/99 ; AMD , 200 0 MA R p . 2696 , Eff

. 10/6/00 ; AMD

. 200 1 MA R p . 1468 , Eff

. 8/10/01 : AMD

. 200 2 MA R p . 1747 , Eff

. 6/28/02 ; AMD , 200 3 MA R p . 645 , Eff

. 4/11/03 ; AMD

. 200 4 MA R p . 724 , Eff

. 4/9/04 ; AMD

. 200 5 MA R p . 959 , Eff

. 6/17/05 ; AMD

. 200 6 MA R p . 1956 , Eff

. 8/11/06 ; AMD , 200 7 MA R p . 1663 , Eff

. 10/26/07 ; AMD

. 200 8 MA R p . 2267 , Eff

. 10/24/08. )

ADMINISTRATIV E RULE S O F MONTAN A12/31/0 8 17-23 3AI R QUALIT Y17.8,30 1 Subchapte r3

. Emissio n Standard s 17:8.30 1 DEFINITION S Fo rpurpose s of thi s subchapter , th e followin g definition s apply : (1 ) "112(g ) exemption " mean s a documen t issue d b yth e departmen t o n a case-by-cas e basis , findin g tha t a majo rsourc e o f HA P meet s th e criteri a containe d i n 4 0 CF R 63.4 1 (definitio n o f "construc t a majo rsource" , (2)(l ) throug h (vi)) , an d i s thu s exemp t fro m th e requirement s o f4 2 US C 7412(g)

. (2 ) "Airborn e particulat e matter " mean s an yparticulat e matte rdischarge d int o th e outdoo ratmospher e whic h i s no t discharge d fro m th e norma l exi t o f a stac k o rchimne yfo rwhic h a sourc e tes t ca n b e performe d i n accordanc e wit h 4 0 CF R Par t 60 , Appendi xA , metho d 5 (determinatio n o f particulat e emission s fro m stationarysources)

. (3 ) "Bes t availabl e contro l technolog y(BACT) " mean s a n emissio n limitatio n (includin g a visibl e emissio n standard) , base d o n th e maximu m degre e ofreductio n fo reac h ai rpollutan t whic h woul d b e emitte d fro m an ysourc e o ralteratio n whic h th e department , o n a case-by-cas e basis , takin g int o accoun t energy , environment , an d economi cimpact s an d othe rcosts , determine s i s achievabl e fo rsuc h source s o r alteration s throug h applicatio n of productio n processe s o ravailabl e methods , systems , an d techniques , includin g fue l cleanin g o rtreatmen t o rinnovativ e fue l combustio n technique s fo rcontro l o f suc h ai rcontaminant

. I n n o even t shal l •applicatio n o fBAC Tresul t i n emissio n of an yai rcontaminan t whic h woul d excee d th e emission s allowe d b yan yapplicabl e standar d unde rthi s chapter

. I f th e departmen t determine s tha t technologica l o reconomi climitation s o n th e applicatio n o f measuremen t methodolog yt o a particula rclas s o f source s o ralteration s woul d mak e th e impositio n o fa n emissio n standar d infeasible , i t ma yinstea d prescrib e a design , equipment , wor k practic e o roperationa l standar d o rcombinatio n thereof , t o requir e th e applicatio n o fBACT

. Suc h standar d shall , t o th e degre e possible , se t fort h th e emissio n reductio n achievabl e b yimplementatio n o f suc h design , equipment , wor k

practic e o roperation an d shal l provid e fo rcomplianc e b ymean s whic h achiev e equivalen t results

.

ADMINISTRATIV E RULE S O F MONTAN A9/30/0 6 17-30 117.8.30 1 ENVIRONMENTA L QUALIT Y (4 ) "Beginnin g actua l construction " means , i n general , initiatio n o f physica l on-sit e constructio n activitie s o f a permanen t nature

. Suc h activitie s include , bu t ar e no t limite d to , installatio n o fbuildin g support s an d foundations , layin g o f undergroun d pipework , an d constructio n o f permanen t storag e structures

. (5 ) "Building , structure , facility , o rinstallation " meian s al l ofth e pollutant
emittin g activitie s whic h belon g t o th e sam e industria l grouping , ar e locate d o n on e o rmor e contiguou s o radjacen t properties , an d ar e unde rth e contro l o f th e sam e perso n (o rperson s unde rcommo n control ) excep t th e activitie s o f an yvessel

. Pollutant-emittin g activitie s shal l b e considere d a s part o f th e sam e industria l

. groupin g i fthe ybelon g t o th e sam e majo rgrou p (i.e. , whic h hav e th e sam e two-digi t code ) a s describe d i n th e standar d industria l classificatio n manual , 1987

. (6 ) "Construc t a majo rsourc e o f HAP " means : (a ) t o fabricate , erect , o rinstal l a majo rsourc e o f HAP ; o r (b ) t o reconstruc t a majo rsourc e of HAP , b yreplacin g component s a t a n existin g proces s o rproductio n uni t tha t i n an d o f itsel f emit s o rha s th e potentia l t o emi t te n ton s pe ryea rofan yHAP , o r2 5 ton s pe ryea ro f an ycombinatio n ofHAP , whenever : (i ) th e fixe d capita l cos t o f th e ne wcomponent s exceed s 50 % o f th e fixe d capital cos t tha t woul d b e require d t o construc t a comparabl e proces s o rproductio n unit ; an d (ii ) i t i s technicall yan d economicall yfeasibl e fo rth e reconstructe d majo r sourc e t o mee t th e applicabl e maximu m achievabl e contro l technolog yemissio n limitatio n fo rne wsource s establishe d unde r4 0 CF R ? 3 Subpart B

. (7 ) "Existin g fue l burnin g equipment " mean s fue l burnin g equipmen t constructe d o rinstalle d prio rt o Novembe r23 , 1968

. (8 ) "Greenfiel d site " mean s a contiguou s are a unde rcommo n contro l tha t i s a n undevelope d site'

. (9 ) "Hazardou s ai rpollutant " ("HAP" ) mean s an yai rpollutan t liste d i n o r pursuan t t o 4 2 US C 7412(b)

. (10 ) "Lowes t achievabl e emissio n rate " ("LAER" ) means , fo ran ysource , tha t rat e o femission s whic h reflects : (a ) th e mos t stringen t emissio n limitatio n whic h i s containe d i n th e implementatio n pla n o fan ystat e fo rsuc h clas s o rcategoryof source , unles s th e owne ro roperato ro fth e propose d sourc e demonstrates tha t suc h limitation s ar e no t achievable ; o r (b ) th e mos t stringen t emissio n limitatio n whic h i s achieve d i n practic e b y suc h clas s o rcategoryo fsource , whicheve ri s mor e stringent

. I n n o even t shal l th e applicatio n o fthi s ter m permi t a propose d ne wo rmodifie d sourc e t o emi t an y pollutan t i n exces s ofth e amoun t allowabl e unde rapplicable ne wsourc e standard s o f performanc e unde r4 0 CF R Part s 6 0 an d 61

.

17-30 2 9/30/0 6 ADMINISTRATIV E RULE S O F MONTAN AAI R QUAUT Y17.8.30 1 (11 ) "Majo rsourc e o f HAP " means : (a ) at an ygreenfiel d site , a stationarysourc e o rgrou p o f stationarysource s whic h i s locate d withi n a contiguou s are a an d unde rcommo n contro l an d whic h emit s o rha s th e potentia l t o emi t te n ton s pe ryea ro f an yHA P o r2 5 ton s pe ryea ro f an ycombinatio n o fHAP ; o r (b ) at an ydevelope d site , a ne wproces s o rproductio n uni t whic h i n an d o f itsel femit s o rha s th e potentia l t o emi t te n ton s pe ryea ro f an yHA P o r2 5 ton s pe r yea rofan ycombinatio n o fHAP

. (12 ) "Maximu m achievabl e contro l technology " ("MACT" ) mean s th e emissio n limitatio n whic h i s no t les s stringen t tha n th e emissio n limitatio n achieve d i n practic e b yth e bes t controlle d simita rsource , an d whic h reflect s th e maximu m degre e o f reductio n i n emission s tha t th e department , takin g int o consideratio n th e cos t o f achievin g suc h emissio n reduction , an d an ynonai rqualit yhealt h an d environmenta l impact s an d energ yrequirements , determine s i s achievabl e b yth e constructe d o r reconstructe d majo rsourc e o f HAP

. (13 ) "Ne wfue l burnin g equipment " mean s fue l burnin g equipmen t constructed , installe d o raltere d afte rNovembe r23 , 1968

. (14 ) "Notic e o fMAC Tapproval " mean s a documen t issue d byth e departmen t containin g al l federall yenforceabl e condition s necessaryt o enforc e MAC To rothe rcontro l technologie s suc h tha t th e MAC Temissio n limitatio n is

. met

. (15 ) "Proces s o rproductio n unit " mean s an ycollectio n o f structure s and/o r equipment , tha t processes , assembles , applies , orotherwis e use s materia l input s t o produc e o rstor e a n intermediat e o rfina l product

. Asingl e facilit yma ycontai n mor e tha n on e proces s o rproductio n unit

. (16 ) "Proces s weight " mean s th e tota l weigh t of al l material s introduce d int o an yspecifi cproces s whic h maycaus e emissions

. Soli d fuel s charge d wil l b e considere d a s part o fth e proces s weight , bu t liqui d an d gaseou s fuel s an d combustio n ai rwil l not

.

ADMINISTRATIV E RULE S O F MONTAN A9/30/0 6 17-30 317.8.30 2 ENVIRONMENTA L QUALIT Y (17 ) "Proces s weigh t rate " mean s th e rat e establishe d a s follows : (a ) fo rcontinuou s o rlong-ru n steady-stat e operations , th e tota l proces s weigh t fo rth e entir e perio d o f continuou s operation o rfo ra typica l portio n thereof , divide d b yth e numbe ro fhour s o f suc h perio d o rportio n thereof ; . (b ) fo rcyclica l o rbatc h operations , th e tota l proces s weigh t fo ra perio d tha t cover s a complet e operatio n o ra n integra l numbe rd fcycles , divide d b yth e hour s o f actua l proces s operatio n durin g suc h a period

. Wher e th e natur e o fan yproces s o r operatio n o rth e desig n o fan yequipmen t i s suc h a s t o penni t mor e tha n on e interpretatio n o fthi s definition , th e interpretatio' n tha t result s i n th e minimu m valu e fo r allowabl e emission s shal l apply

. (18 ) "Reasonabl e precautions " mea n an yreasonabl e measure s t o contro l emission s ofairborn e particulat e matter

. Determinatio n o f wha t i s reasonabl e wil l b e accomplishe d o n a case-by-cas e basi s takin g int o accoun t energy , environmental , economic , andothercosts

. (19 ) "Reasonabl yavailabl e contro l technology " mean s devices , systems , proces s modifications , o rothe rapparatu s o rtechnique s tha t ar e determine d o n a case-by-cas e basi s t o b e reasonabl yavailable , takin g int o accoun t th e necessit yo f imposin g suc h control s i n orde rt o attai n an d maintai n a nationa l o rMontan a ambien t ai rqualit ystandard , th e social , environmental , an d economic,impac t o f suc h controls , an d alternativ e mean s of providin g fo rattainmen t an d maintenanc e o f suc h standard

. (History : 75-2-111 , 75-2-203 , 75-2-204 , MCA ; IMP , 75-2-203 , MCA ; NEW , 199 3 MA R p . 2530 , Eff

. 10/29/93 ; TRANS , fro m DHES , 199 6 MA R p , 2285 ; AMD

. 199 9 MA R p . 1658 , Eff

. 7/23/99 ; AMD

. 2001 MA R p . 976 , Eff

. 6/8/01 ; AMD , 200 8 MA R p..2267 , Eff

. 10/24/08. ) 17.8.30 2 INCORPORATIO N BYREFERENC E (1 ) Fo rth e purpose s of^fii s [pter , th e boar d adopt s an d incorporate s b yreferenc e th e following:^/ ^ .4 0 CF R Par

t 60 , pertainin g t o standard s o f performanc e fqiy^ w stationarysbfcii;ces an d modifications , wit h th e followin g exceptio r (i ) 4 0 m^O.150 0 throug h 194 0 an d table s 1 throupir s (subpar t BBBB) , emissio n guideline^ ^ existin g smal l municipa l wast e ^orfiDustio n units , ar e no t incbrporate d byreferenb^an d (ii ) 4 0 CF R 60.4141^442 , pertainin g toj^i^rcur yallowanc e allocations ; (b ) 4 0 CF R Par

t 61 , pertsiinin g t o ejipt^o n standard s fo rhazardou s ai r pollutants ; (c ) 4 0 CF R Par

t 63 , pertaii>P(^^tl>>emissio n standard s fo rhazardou s ai r pollutan t sourc e categories ; (d ) _40 CF R 81.327^Jp^rtainin g t o th e aihqjjalit yattainmen t statu s designation s fo rMontaij : (e ) AR M Titl)S^7 , chapte r53 , subchapte r5 , pertg|nin g t o th e identificatio n an d listin g o fha^^dou s waste ; an d (f ) th^'^andar d Industria l Classificatio n Manua l (1987)>^ic e o f Managep^ t an d Budge t (P B 87-100012) , pertainin g t o a systerrhstjndustria l classiftcatio n an d definitio n base d upo n th e compositio n an d structure^th e eoemomy .

17-30 4 12/31/0 8 ADMINISTRATIV E RULE S O F MONTANA

.AI R QUALIT Y17.8.30 8 17.8.30 8 PARTICULAT E MATTER

. AIRBORN E (1 ) N o perso n shal l caus e o rauthoriz e th e production , handling , transportation , o rstorag e o f an ymateria l unles s reasonabl e precaution s t o contro l emission s o f airborn e particulat e matte rar e taken

. Suc h emission s o fairborn e particulat e matte rfro m an ystationarysourc e shal l no t exhibi t a n opacit yo f20 % o rgreate raverage d ove rsi xconsecutiv e minutes , excep t fo remissio n o fairborn e particulat e matte roriginatin g fro m an y transfe rladl e o roperatio n engage d i n th e transfe ro f molte n meta l whic h wa s installe d o roperatin g prio rt o Novembe r23 , 1968

. (2 ) N o perso n shal l caus e o rauthoriz e th e us e o fan ystreet , road , o rparkin g lo t withou t takin g reasonabl e precaution s t o contro l emission s o fairborn e particulat e matter

. (3 ) N o perso n shal l operat e a constructio n sit e o rdemolitio n projec t unles s reasonabl e precaution s ar e take n t o contro l emission s o f airborn e particulat e matter

. Suc h emission s o fairborn e particulat e matte rfro m an ystationarysourc e shal l no t exhibi t a n opacit yo f20 % o rgreate raverage d ove rsi xconsecutiv e minutes

. (4 ) Withi n an yare a designate d nonattainmen t i n 4 0 CF R 81.32 7 fo rPM , an y perso n wh o own s o roperates : (a ) an yexistin g sourc e o f airborn e particulat e matte rshal l appl yreasonabl y availabl e contro l technolog y(RACT) ; (b ) an yne wsourc e o fairborn e particulat e matte rtha t ha s a potentia l t o emi t les s tha n 10 0 ton s pe ryea ro fparticulat e matte rshal l appl ybes t availabl e contro l technolog y(BACT) ; (c ) an yne wsourc e o fairborn e particulat e matte rtha t ha s a potentia l t o emi t mor e tha n 10 0 ton s pe ryea ro f particulat e matte rshal l appl ylowes t achievabl e emissio n rat e (LAER)

. (5 ) Th e provision s o fthi s rul e shal l no t appl yt o emission s o f airborn e particulat e matte roriginatin g from : (a ) an yagricultural activit yo requipmen t tha t i s associate d wit h th e us e o f agricultura l lan d o rth e planting , production , processing , harvesting , o rstorag e o f agricultura l crop s b ya n agricultura l produce ran d tha t i s no t subjec t t o th e requirement s o f4 2 US C 7475 , 7503 , o r7661 , a s se t fort h i n 75-2-111(1)(a) , MCA ; o r (b ) a busines s relatin g t o th e activitie s o requipment referre d t o i n (5)(a ) tha t remain s i n a singl e locatio n fo rles s tha n 1 2 month s an d i s no t subjec t t o th e requirement s o f4 2 US C 7475 , 7503 , o r7661 , a s se t fort h i n 75-2-11 1 ( 1 )(b) , MCA

. (History : 75-2-111 , 75-2-203 , MCA ; MP , 75-2-203 , MCA ; Eff

. 12/31/72 ; AMD , 197 9 MA R p . 145 , Eff

. 2/16/79 ; AMD

. 199 3 MA R p . 2530 , Eff

. 10/29/93 ; TRANS , fro m DHES , 199 6 MA R p . 2285 ; AMD , 200 0 MA R p . 836 , Eff

. 3/31/00 ; AMD

. 200 9 MA R p . 142 , Eff

. 2/13/09. )

ADMINISTRATIV E RULE S O F MONTAN A3/31/0 9 17-30 9AI R QUALIT Y17.8.90 1 Subchapte r9 Permi t Requirement s fo rMajo rStationar ySource s o r Majo rModification s Locatin g Withi n Nonattainmen t Area s 17.8.90 1 DEFINITION S I n thi s subchapte rth e followin g definition s apply : (1 ) "Actua l emissions " mean s th e actua l rat e of emission s of a pollutan t fro m a n emission s uni t as determine d i n accordanc e wit h (1)(a ) throug h (c)

. (a ) Actua l emission s a s of a particula rdat e shal l equa l th e averag e rate , i n ton s pe ryear , at whic h th e uni t actuall yemitte d th e pollutan t durin g a two-yea r perio d whic h precede s th e particula rdat e an d whic h I s representativ e o f norma l sourc e operation

. Th e departmen t ma ydetermin e tha t a differen t tim e i s more representativ e o fnorma l sourc e operation

. Actua l emission s shal l b e calculate d usin g th e unit' s actua l operatin g hours , productio n rates , an d type s o f material s processed , stored , o rcombuste d durin g th e selecte d tim e period

. (b ) I fth e departmen t i s unabl e t o determin e actua l emission s consisten t wit h (1)(a) , th e departmen t ma ypresum e that th e source-specifi callowabl e emission s fo r th e uni t are equivalen t t o th e actua l emission s o f th e unit

. (c) Fo ran yemission s uni t whic h has not begu n norma l operation s o n th e particula rdate , actua l emission s shal l equa l th e potentia l t o emi t of th e uni t o n that date

. (2 ) "Allowabl e emissions " mean s th e emission s rat e o fa stationar ysourc e calculate d usin g th e maximu m rate d capacit yofth e sourc e (unles s th e sourc e i s subjec t t o federall yenforceabl e limit s whic h restrict th e operatin g rat e o rhour s of operation , o rboth ) an d th e most stringen t ofth e following : (a) th e applicabl e standard s as se t fort h i n AR M 17.8.34 0 o r17.8.341 ; (b ) th e applicabl e emission s limitatio n containe d i n th e Montan a Stat e Implementatio n Plan , includin g thos e wit h a future complianc e date ; o r (c ) th e emission s rat e specifie d as a federall yenforceabl e permi t condition , includin g thos e wit h a futur e complianc e date

. (3 ) "Begi n actua l construction " means , i n general , Initiatio n of physica l on-sit e constructio n activitie s ofa permanen t nature o n a n emission s unit

. Suc h activitie s include , bu t are not limite d to , installatio n of buildin g support s an d foundations , layin g ofundergroun d pipework , an d constructio n o fpermanen t storag e structures

. Wit h respec

t t o a chang e I n metho d of operation , thi s ter m refers t o thos e on-sit e activitie s othe rtha n preparator yactivitie s whic h mar k

th e initiatio n of th e change

. (4 ) "Building , structure , facility , o rinstallation " mean s al l ofth e pollutant
emittin g activitie s whic h belon g t o th e sam e industria l grouping , are locate d o n on e o rmore contiguou s o radjacen t properties , an d ar e unde rth e contro l ofth e sam e perso n (o rperson s unde rcommo n control) , excep t th e activitie s of an yvessel

. Pollutant-emittin g activitie s shal l b e considere d a s par t ofth e sam e industria l groupin g i ftheybelon g t o th e sam e majo rgrou p (i.e. , havin g th e sam e two-digi t code ) as describe d i n th e Standard Industria l Classificatio n Manual , 1987

.

ADMINISTRATIV E RULE S O F MONTAN A9/30/0 6 17-52 117.8.90 1 ENVIRONMENTA L QUALIT Y (5 ) "Commence" , as applie d t o constructio n o f a majo rstationar ysource o r majo rmodification , mean s that th e owne ro roperato rhas al l necessar y preconstructio n approval s o rpermit s an d eithe rhas : (a) begun , o rcause d t o begin , a continuou s progra m ofactua l on-sit e constructio n ofth e source , t o b e complete d withi n a reasonabl e time ; o r (b ) entere d int o bindin g agreement s o rcontractua l obligations , whic h cannot b e cancele d o rmodifie d withou t substantia l los s t o th e owne ro roperator , t o undertake a progra m ofactua l constructio n of th e sourc e t o be complete d withi n a reasonabl e time

. (6 ) "Construction " mean s an yphysica l chang e o rchang e i n th e metho d of operatio n (includin g fabrication , erection , installation , demolition , o rmodificatio n of a n emission s unit ) whic h woul d resul t i n a chang e i n actua l emissions

. (7 ) "Emission s unit " mean s an ypar t of a stationar

ysourc e whic h emit s o r woul d have th e potentia l t o emi t an ypollutan t subjec t t o regulatio n unde rth e FCAA

. (8 ) "Federall yenforceable " mean s al l limitation s an d condition s whic h are enforceabl e b

yth e administrator , includin g thos e requirement s develope d pursuan t t o 4 0 CF R Part s 6 0 an d 61 , requirement s withi n th e Montan a Stat e Implementatio n Plan , an d an ypermi t requiremen t establishe d pursuan t t o 4 0 CF R 52.2 1 o runde r regulation s approve d pursuan t t o 4 0 CF R Par t 51 , subpar

t I , includin g operatin g permit s issue d unde ra n EPA-approve d progra m that i s incorporate d int o th e Montan a Stat e Implementatio n Pla n an d expressl yrequire s adherenc e t o an ypermi t issue d unde rsuc h program . (9 ) "Fugitiv e emissions " mean s thos e emission s whic h coul d not reasonabl y pas s throug h a stack , chimney , vent , o rothe rfunctionall yequivalen t opening

. (10 ) "Lowes t achievabl e emissio n rate " means , fo ran ysource , th e mor e stringen t rat e ofemission s base d o n th e following : (a) th e most stringen t emission s limitatio n whic h i s containe d i n th e implementatio n pla n o fan ystat e fo rsuc h clas s o rcategor yofstationar

ysource , unles s th e owne ro roperato rof th e propose d stationar ysourc e demonstrate s that suc h limitation s are not achievable ; o r (b ) th e most stringen t emission s limitatio n whic h i s achieve d i n practic e b y suc h clas s o rcategor

yofstationar

ysources . Thi s limitation , whe n applie d t o a modification , mean s th e lowest achievabl e emission s rat e fo rth e ne wo rmodifie d emission s unit s withi n a stationar ysource . I n n o even t shal l th e applicatio n ofth e ter m permi t a propose d newo rmodifie d stationar ysourc e t o emi t an ypollutan t i n exces s ofth e amoun t allowabl e unde rapplicabl e newsourc e standard s of performanc e unde r4 0 CF R Parts 6 0 an d 61

.

17-52 2 9/30/0 6 ADMINISTRATIV E RULE S O F MONTAN AAI R QUALIT Y17.8.90 1 (11 ) "Majo rmodification " mean s an yphysica l chang e in , o rchang e i n th e metho d of , operatio n o fa majo rstationar ysourc e tha t woul d resul t i n a significan t net emission s increas e ofan ypollutan t subjec t t o regulatio n unde rth e FCAA

. (a ) An ynet emission s increas e that i s considere d significan t fo rvolatil e organi ccompound s I s considere d significan t fo rozone . (b ) Aphysica l chang e in , o rchang e i n th e metho d of , operatio n doe s not include : (i ) routin e maintenance , repair , an d replacement ; (ii ) us e ofa n alternativ e fue l o rra wmateria l b

yreaso n of a n orde runde r (2)(a ) an d (2)(b ) ofth e Energ ySuppl yan d Environmenta l Coordinatio n Act of 1974 , 1 5 US C 791 , e t seq . (1988) , o rb yreaso n of a natura l ga s curtailmen t pla n pursuan t t o th e Federa l Powe rAct , 1 6 US C 791a , etseq

. (198 8 an d Supp

. Il l 1991) ; (iii ) us e ofa n alternativ e fue l b yreaso n of a n orde ro rrul e unde rsectio n 12 5 of th e FCAA ; (iv ) us e ofa n alternativ e fue l at a stea m generatin g uni t t o th e exten t that th e fue l i s generate d fro m municipa l soli d waste ; (v ) us e ofa n alternativ e fue l o rra wmateria l b

ya stationar

ysourc e which : (A ) th e sourc e wa s capabl e of accommodatin g before Decembe r21 , 1976 , unles s suc h chang e woul d be prohibite d unde ran yfederall yenforceabl e permi t conditio n whic h wa s establishe d afte rDecembe r12 , 1976 , pursuan t t o 4 0 CF R 52.2 1 o runde rregulation s approve d pursuan t t o 4 0 CF R Par t 51 , subpar

t I , o r sectio n 51.166 ; o r (B ) th e sourc e I s approve d t o us e unde ran ypermi t issue d unde rregulation s approve d pursuan t t o 4 0 CF R 51.165 ; (vi ) a n increas e i n th e hour s of operatio n o rI n th e productio n rate , unles s suc h chang e i s prohibite d unde ran yfederall yenforceabl e ai rqualitypreconstructio n permi t conditio n whic h wa s establishe d afte rDecembe r21 , 197 6 pursuan t t o 4 0 CF R 52.2 1 o runde rregulation s approve d pursuan t t o 4 0 CF R Par t 51 , subpar

t I , o r sectio n 51.166 ; (vii ) an ychang e i n ownershi p at a stationar ysource . (12 ) Th e followin g appl yt o th e definitio n ofth e ter m "majo rstationar y source" : (a) "majo rstationar

ysource " means : (i ) an ystationar

ysourc e o f ai rpollutant s whic h emits , o rha s th e potentia l t o emit , 10 0 ton s pe ryea ro rmor e of an ypollutan t subject t o regulatio n unde rth e FCAA ; o r (ii ) an ystationar

ysourc e ofai rpollutant s locate d I n a seriou s particulat e matte r(PM-10 ) nonattainmen t are a whic h emits , o rha s th e potentia l t o emit , 7 0 ton s pe ryea ro rmor

e ofPM-10 ; o r (iii ) an yphysica l chang e that woul d occu rat a stationar ysourc e not qualifyin g unde r(12)(a)(i ) o r(ii ) as a majo rstationar ysource , i f th e chang e woul d constitut e a majo rstationar ysourc e b

yitself

.

ADMINISTRATIV E RULE S O F MONTAN A12/31/0 8 17-52 317.8.90 1 ENVIRONMENTA L QUALIT Y (b ) Th e fugitiv e emission s of a stationar ysourc e wil l not be include d i n determining , fo ran yofth e purpose s o f thi s subchapter , whethe rI t i s a majo r stationar ysource , unles s th e sourc e belong s t o on e of th e followin g categorie s of stationar ysources : (i ) coa l cleanin g plant s (wit h therma l dryers) ; (ii ) kraf t pul p mills ; (ill ) Portlan d cemen t plants ; (iv) primar

yzin csmelters ; (v ) iro n an d stee l mills ; (vi ) primar

yaluminu m ore reductio n plants ; (vii ) primar

ycoppe rsmelters ; (viii ) municipa l incinerators capabl e of chargin g mor e tha n 25 0 ton s of refus e pe rday ; (ix) hydrofluoric , sulfuric , o rnitri caci d plants ; (x ) petroleu m refineries ; (xi ) lim e plants ; (xii ) phosphat e roc k

processin g plants ; (xiii ) cok e ove n batteries ; (xiv) sulfu rrecover

yplants ; (xv ) carbo n blac k

plant s (furnac e process) ; (xvi ) primar

ylea d smelters ; (xvii ) fue l conversio n plants ; (xviii ) sinterin g plants ; (xix) secondar

ymeta l productio n plants ; (xx) chemica l proces s plants ; (xxi ) fossil-fue l boiler

s (o rcombinatio n thereof ) totalin g mor e tha n 25 0 millio n Britis h therma l unit s pe rhou rheat input ; (xxii ) petroleu m storag e an d transfe runit s wit h a tota l storag e capacit y exceedin g 300,00 0 barrels ; (xxiii ) taConite ore processin g plants ; (xxiv) glas s fibe rprocessin g plants ; (xxv) charcoa l productio n plants ; (xxvi ) fossi l fuel-fire d stea m electri cplants of more tha n 25 0 millio n Britis h therma l unit s pe rhou rheat input ; an d (xxvii ) an yothe rstationar ysourc e categor

ywhich , as of Augus t 7 , 1980 , i s bein g regulate d unde rsection s 11 1 o r11 2 of th e FCAA

. (13 ) "Necessar

ypreconstructio n approval s o rpermits " mean s thos e permits o rapproval s require d unde rfedera l ai rqualitycontro l laws an d regulation s an d thos e ai rqualitycontro l laws an d regulation s whic h are par t of th e Montan a Stat e Implementatio n Plan

.

17-52 4 9/30/0 6 ADMINISTRATIV E RULE S O F MONTAN AAI R QUALIT Y17.8.90 1 (14 ) Th e followin g appl yt o th e definitio n ofth e ter m "ne t emission s increase" : (a) "ne t emission s increase " mean s th e amoun t b ywhic h th e su m ofth e followin g exceed s zero : (i ) an yincreas e I n actua l emission s fro m a particula rphysica l chang e o r chang e i n th e metho d ofoperatio n a t a stationar

ysource ; an d (ii ) an yothe rincrease s an d decrease s i n actua l emission s at th e sourc e that are contemporaneou s wit h th e particula rchang e an d are otherwis e creditable

. (b ) A n increas e o rdecreas e i n actua l emission s i s contemporaneou s wit h th e increas e fro m th e particula rchang e onl yi fi t occur s betwee n th e dat e five year s before constructio n o n th e particula rchang e commenced , an d th e dat e tha t th e increas e fro m th e particula rchang e occurs . (c) A n increas e o rdecreas e i n actua l emission s I s creditabl e onl yi f th e departmen t has no t relie d o n i t i n issuin g a permi t fo rth e sourc e unde rregulation s approve d pursuan t t o 4 0 CF R 51.165 , whic h permi t i s i n effect whe n th e increas e i n actua l emission s fro m th e particula rchang e occurs . (d ) A n Increas e I n actua l emission s i s creditabl e onl yt o th e exten t that th e ne wleve l ofactua l emission s exceed s th e ol d level

. (e ) Adecreas e i n actua l emission s i s creditabl e onl yt o th e exten t that : (i ) th e ol d leve l ofactua l emission s o rth e ol d leve l of allowabl e emissions , whicheve ri s lower , exceed s th e newleve l o f actua l emissions ; (ii ) i t i s federall yenforceabl e at an d afte rth e tim e tha t actua l constructio n o n th e particula rchang e begins ; (iii ) th e departmen t has not relie d o n i t i n issuin g an yMontan a ai rquality permi t unde rregulation s approve d pursuan t t o 4 0 CF R Par t 51 , subpar

t I (Jul y1 , 199 3 ed.) , o rth e stat e has not relie d o n i t i n demonstratin g attainmen t o rreasonabl e furthe rprogress ; an d (iv) i t has approximatel yth e sam e qualitativ e significanc e fo rpubli chealt h an d welfare as tha t attribute d t o th e increas e fro m th e particula rchange

. (f) A n increas e tha t result s fro m a physica l chang e at a sourc e occur s whe n th e emission s uni t o n whic h constructio n occurre d become s operationa l an d begin s t o emi t a particula rpollutant

. An yreplacemen t uni t tha t require s shakedow n become s operationa l onl yafte ra reasonabl e shakedow n period , not t o excee d 18 0 days

.

ADMINISTRATIV E RULE S O F MONTAN A9/30/0 6 17-52 517.8.90 1 ENVIRONMENTA L QUALIT Y (15 ) "Potentia l t o emit " mean s th e maximu m capacit yo fa stationarysourc e t o emi t a pollutan t unde rit s physica l an d operationa l design

. An yphysica l o r operationa l limitatio n o n th e capacit yo f th e sourc e t o emi t a pollutant , includin g ai r pollutio n contro l equipmen t an d restriction s o n hour s o foperatio n o ro n th e typ e o r amoun t o f materia l combusted , stored , o rprocessed , shal l b e treate d a s par t o fit s desig n onl yi f th e limitatio n o rth e effec t i t woul d hav e o n emission s i s federall y enforceable

. Secondar yemission s d o no t coun t i n determinin g th e potentia l t o emi t o fa stationar ysource . (16 ) "Reasonabl e furthe rprogress " mean s annua l incrementa l reduction s i n emission s o f th e applicabl e ai rpollutan t whic h ar e require d b yth e FCA Ao rth e administrato rfo rattainmen t o fth e applicabl e nationa l ambien t ai rqualit ystandar d b y th e dat e require d i n sectio n 172(a ) o fth e FCAA

. (17 ) "Secondar yemissions " mean s emission s whic h woul d occu ra s a resul t o f th e constructio n o roperatio n o fa majo rstationarysourc e o rmajo rmodification , bu t d o no t com e fro m th e majo rstationarysourc e o rmajo rmodificatio n Itsel f Fo r th e purpos e o fthi s chapter , secondar yemission s mus t b e specific , wel l defined , quantifiable , an d impac t th e sam e genera l are a a s th e stationar ysourc e o r modificatio n whic h cause s th e secondar yemissions

. Secondar yemission s includ e emission s fro m an yoffsit e suppor t facilit ywhic h woul d no t b e constructe d o r increas e it s emission s excep t a s a resul t o f th e constructio n o roperatio n o fth e majo rstationar ysourc e o rmajo rmodification

. Secondar yemission s d o no t includ e an yemission s whic h com e directl yfro m a mobil e sourc e suc h a s emission s fro m th e tailpip e o fa moto rvehicle , fro m a train , o rfro m a vessel

. (18 ) "Significant " means , i n referenc e t o a ne t emission s increas e o rth e potentia l o f a sourc e t o emi t an yo fth e followin g pollutants , a rat e o f emission s tha t woul d equa l o rexcee d an yo fth e followin g rates : Pollutan t an d Emissio n Rat e Carbo n monoxide : 10 0 ton s pe ryea r(tpy ) Nitroge n oxides : 4 0 tp y Sulfu rdioxide : 4 0 tp y Particulat e matter : 2 5 tp yo fparticulat e matte remission s o r1 5 tp yo f PM-1 0 emission s Lead : 0. 6 tp y (19 ) "Stationar ysource " mean s an ybuilding , structure , facility , o rinstallatio n whic h emit s o rma yemi t an yai rpollutan t subjec t t o regulatio n unde rth e FCAA

. (20 ) "Volatil e organi ccompound s (VOC) " mean s th e sam e a s define d i n 4 0 CF R 51.100(s)

. (History : 75-2-111 , 75-2-203 , MCA ; IMP , 75-2-202 , 75-2-203 , 75-2
- 204 , MCA ; NEW

. 199 3 MA R p . 2919 , Eff

. 12/10/93 ; AMD , 199 5 MA R p . 2410 , Eff

. 11/10/95 ; AMD , 199 6 MA R p . 1843 , Eff

. 7/4/96 ; AMD

. 199 6 MA R p . 1844 , Eff

. 7/4/96 ; TRANS , fro m DHES , 199 6 MA R p . 2285 ; AMD , 199 8 MA R p . 1725 , Eff

. 6/26/98 ; AMD

. 200 2 MA R p . 1747 , Eff

. 6/28/02 ; AMD

. 200 2 MA R p . 3567 , Eff

. 12/27/02 ; AMD

. 200 3 MA R p . 645 , Eff

. 4/11/03 ; AMD

. 200 7 MA R p . 1663 , Eff

. 10/26/07 ; AMD

. 200 8 MA R p . 2267 , Eff

. 10/24/08. )

NEX TPAG E I S 17-52 9 17-52 6 12/31/0 8 ADMINISTRATIV E RULE S O F MONTAN A17.8.100 7 ENVIRONMENTA L QUALIT Y 17.8.100 7 BASELIN E FO R DETERMININ G CREDI TFO R EMISSION S AN D AI R QUALIT

YOFFSET S (1 ) Fo rth e purpose s of thi s subchapter , th e followin g requirement s shal l apply : (a) th e requirement s o f AR M 17.8.906 , excep t tha t 17.8.906(7 ) throug h (9 ) are not applicabl e t o offset s require d unde rthi s subchapter ; (b ) emissio n offset s must be reduction s i n actua l emission s fo rth e sam e pollutan t obtaine d fro m th e sam e sourc e o rothe rsource s whic h are locate d i n th e sam e genera l are a ofth e propose d majo rstationar ysourc e o rmodification , an d tha t contribut e t o o rwoul d contribut e t o th e violatio n ofth e nationa l ambien t ai rquality standard ; (c) i n th e cas e o femissio n offset s involvin g volatil e organi ccompound s an d oxide s ofnitrogen , offset s wil l generall yb e acceptabl e i f the yare obtaine d fro m withi n th e area s specifie d i n (1)(b)

. I f th e propose d offset s woul d b e fro m source s locate d at considerabl e distance s frort i th e ne wsource , th e departmen t shal l increas e th e rati o o fth e require d offset s an d require a showin g b yth e applican t that nearbyoffset s were investigate d an d reasonabl e alternative s wer e not available ; (d ) i n th e cas e ofemissio n offset s involvin g sulfu rdioxide , particulates , an d carbo n monoxide , areawid e mas s emissio n offset s are not acceptable , an d th e applican t shal l perfor m atmospheri csimulatio n modelin g t o ensure that emissio n offset s provid e a positiv e net ai rqualitybenefit

. Th e departmen t ma yexemp t th e applican t fro m th e atmospheri csimulatio n modelin g requiremen t i f th e emissio n offset s provid e a positiv e ne t ai rqualitybenefit , are obtaine d fro m a n existin g sourc e o n th e sam e premise s o ri n th e immediat e vicinityof th e newsource , an d th e pollutant s dispers e fro m substantiall yth e sam e effectiv e stac k height ; an d (e ) n o emission s credi t shal l b e allowe d fo rreplacin g on e hydrocarbo n compoun d wit h anothe roflesse rreactivity , excep t fo rthos e compound s liste d i n Tabl e 1 ofEPA' s "Recommende d Polic yo n Contro l of Volatil e Organi cCompounds " (4 2 F R 35314 , Jul y8 , 1977)

. (History : 75-2-111 , 75-2-203 , MCA ; MP , 75-2-202 , 75-2-203 , 75-2-204 , MCA ; NEW , 199 3 MA R p . 2919 , Eff

. 12/10/93 ; TRANS , fro m DHES , 199 6 MA R p . 2285 ; AMD

. 200 7 MA R p . 1663 , Eff

. 10/26/07 ; AMD

. 200 8 MARp

. 2267 , Eff

. 10/24/08. )

NEX TPAG E I S 17-57 1 17-55 6 12/31/0 8 ADMINISTRATIV E RULE S O F MONTAN A