P A R T A PA RTB I)ARTC PART 0 PARTE PART F PAin'()

36 C R I and 2, 01-1:3 TABLE OF CONTENTS CON CE H NlNG GENE RAL PROVISIO NS APP LI CA BLE TO REPORTIN G ANL) P ERr.. ll TT I NG ... ....................................................................................................... ! APPENDIX A. M ethod for Uetenn ining**0~** Minim i s Lt:vcls for Non-Crit eria Reportable Pollu tant s ...................................................................... . .......................... 51 A PP END! X H. Non-criter ia Reportab le P o Umant.s (So rted**alph:.tb~:tkally** by BI N ) ................................ . .................... ....... ... . .......... ..... ......... . . ... ........................ .. ... . 52 APPI '.'N OIX B. No n-cri t eria Repo rt ab l e Po ll uta nts (Sorted by CAS N umber) ........................ 59 CONCERN I NG CONST R UC TION PERMIT$ .................. ... ... ............. ... .............................. 66 C ON CERNING OPERATING PF.RMITS ................................................................. ............. 79 CONC E R NING MMOR STAT I ONARY SOURCE NEW SO U RCE R EVIEW AND**PIU~V£NTION** OF S K i IFI CANT D F. T I:: RIORATIO .. ........ ............ . ... ... ...... .. 115 RESERVED FOR ENV IR ON M EN TAL MA NAGEMENT SY STE MS .............................. I73 RE GI;ONAL llAZI.:: L IMIT S - !:J EST AVAILABL E RETROfiT TECIINOLOGY ( BART} AND R EASONABLE PR OG R ESS (RP ) ...... . ...... ............... 173 STATE M ENTS OF liA S I S . S P ECIF I C STATUTORY AUlHORJTY ,\N()

P U RP OS£ ......... . .. ...... .. ......................... . ................. .... . ............ ......... ........................... 18 8.6**~)** 2013 Stutc of C olonulu 5 CCR 1001 -5 All Ri g)1L• Rc scrn·d . (!100) 833-98440 20 13 Stal e or" Colorado fill Righls Reserved 

### 36 CR 1 and 2, 01-13 

### Page 115 PART D CONCERNING MA JOR STATIONARY SOURCE NEW SOURCE REVIEW AND PREVENTION OF SIGNIFICANT DETERIORATION Applicability General Applicabili ty T his Part D shall appl y to any new or existing major stationary source. Any ew major stationary source or major modification, to which the requirem ents f th is Part 

### 0 app , sha ll not beg i n actual construction in 

### a nonattainment, attainment, o r u lass if1able area un ss a permit has been issued containing all applicable state and fede requireme Is . I.A.2. Exce as otherwise provided in Section 

### XV. of this Part 

### D, and n sistent with the definitio of major modi fica tion (Section II.A.22 . of this part) , a roject is a majo r modificatt n for a regulated NSR pollutant if it causes two ty es of emissions increases- significant emissions increase (as defined i n ection I I. A. 43 . of this part), and as nificant net em issions increase (as defi n in Sections I I.A .26. and II.A.42 . of this rt) . The project is not a major modific 1on if it does not cause a significant em issi s increase . I f the proj ect causes significant emissions increase , th en the project is ajor modification only if it ai resul ts in a significant net i. A.3. The procedure for calcul 'ng (before begin · g actual co nstruc t ion) wheth e r a significant emissions i ncre e (i.e.. the firs step of the process) will occur depends upon the type of emissions u 'Is being c structed or modified , according to Secti o n s 

### 1.8.1 . through 

### 1.8.3. of this part . Jhe pr cedu re for calcu lating (before beg i nning actua l construction) whether a si ifi ant net e m issions increase will occur at the major stationary sou rce (i .e. , the s ond step o f the process) is contained in th e defin iti on of Net Emissions lncre e ection II.A. 26. of this part). Regardless of any such preconstruction projectio , a ma r modification results if the pro j ect causes a significant emiss i ons increas and a sign 1cant net emissions increase. 1.8. App l icability Tests 

### 1.8. 1 . Actual-to-projected- tual appl icability test for pr ·eels that on l y invo lve existing emissions units. A signi fi cant emiss ion s · crease of a reg ulated NS R pollutant 

### i rojected to occur if th e sum of the difference be en the projected actual emissions (as defi ed in Secti on II.A.36. of th is part) and the baser e actual emissions (as defin ed in Sections II.A .a . and I I .A.4.b. of thi s part. as applicabl , fo r each existi ng em iss ions unit, equals 

### or exce s the significant amount for that ollutant (as defined in Section II . A.42 . of this part). 1.8.2. Ac al-to-potential test for pro jects that onl y involve construction o new emissions u 1t(s). A sig ficant emissions increase of a regulated N SR pollutant is projected to occ oft e difference between the potential to emit (as defined in Section 1.8.37. of Pa of th is r u la li on) from each new em issions unit following comp let io n of the project and the aseline

ctua l emissions (as defined in Section II.A.4 . of this part) of these u n its befo re the pro · ct equal s or exceeds the sig nificant amount for that pollutant (as defined in Secti on II.A.42. f this part).



### CODE OF COLORADO REGULATIONS 5 CCR 1001 -5Page 116 1.8 . 3. Hybrid test for projects that involve multiple types of emissions units. A significant emissions increase of a regulated NSR pollutant is projected to occur if the su of the emissions increases for each emissions un it , using the me thod s specified in Secti s . 8 . 1. through 1.8 . 3 . of this part as applicab l e with respect to each type of emissions un· , e ua l s or exceeds the significan t amount for that pollutant (as defined in Section II. A. 2. of thi an) . An owner or operator of a major stationary source who conducts the ac al-toejected-actual test for a project th at requ i res a minor permit modific ion in ao ordance with Section X . o f Part C. re quires a significant permit dification in ace dance with Section I.A.3. of Pa r t C, a modifi ca t ion as define 1n Section 1.8 . 28.

of Pa A or that requires a minor s ource permit under Part 8 sh I submit a permit applica n inclu ding : I .B .4.a. All lculations and supporting documentation us to determine baseline actua emissions of each emissions unit affecte y the project; I.B.4.b. All calcul lions and supporting documentati used to determine projected actua l emi ions of each exis t ing emission unit affected by the project; I.B.4 . c . A delermlna t lo of th at portion of each xis ti ng unit's emissions following the project that the it could have acco modated during the consecutive twenty-four month eriod used toe ablish the baseline actual emissions and tha t are unrelated to he project. i eluding any increased utilization due to product demand grow ; and, ted by the Division that may be needed to lion will occ ur al each em i ssions unit affected by The information submitted i The requirementtha e o wn er or operator of a a jor sta tionary source who conducts the actua o-projected-actualtest for a p ject that requires a minor permit mod i fication sub t information i n accordance with ctions I.B.4 . a. through I.B.4.d ..

as se t out in th i Subsection 1.8.4 ., shall not be federa enforceable and shall not be

i ncorporated i to the state im plementation plan. I. C. For any major sta · nary source requesting, or operating under. a P nt-wide Applicability Limitation (as d ned in Section II . A.33.) f or a regu l ated NSR pollutan source s hall c ply with the requirements of Section XV . of this part. II. I I.A. wing definitions apply specifically to the provisions con taine d in this Pa Actual Emissions

The actual rate of emission of a regulated NSR pollutant from an emissions un· , determined as follows : 5 CCR 1001-5 CODE OF COLORADO REGULATIONSr() 20 I 3 Stat e ofColorado 1\1

1 Rights**Rcser~cd** 

### 36 CR 1 and 2, 01-13 Page 117 II.A.1 .a . Actua l emissions as of a particu lar date shall equa l the average rate, i n ton per yea r , at which the unit actu ally emi tted the po ll utant dutin g a consecur e twenty-tour month period th at precedes the pa rti cu lar date and is represe n tative of normal unit operatio n . A different pe riod may be use tf it is mo re representative of no rmal unit opera tio n. Actual emiss ions shall e calculated using the unit's actua l operating hours , prod uction rates nd ty p es of m ate rial s processed , stored or com busted o r a ctua l em i ion data during the selected l ime peri od;**I. ~**  1.b. The Divis i on may p resume tha t source-specific a ll owable e 1ssions for the unit are eq uivalent to the actua l em issions of the unit o n ly · actual emiss i ons ca nn ot be determi ned pursu an t to Section II.A.1.a., abo ; II.A. 1 .c. F any emissions unit that has no t begun normal op ra tions on the pa · ular date, actual emissions shall eq ual th e po ntial to emi t of the un it on th date. II.A.1.d . This defi ' l ion shall not apply fo r calcu lating w ether a significant em issions i ncrease h s occurred, or 

### tor estab lishi n g a AL under Section 

### X:V. of Part D of this regu l ion. Instead, Sections I I.A.3 and II.A.4 . of this part shall apply for these purp ses. II.A.2. Actua ls PAL For a major stationary source, means PAL base on the baseline actua l emissions (as defined in Section II .A.4 . o f th is part) o II em is ·ons un its (as defined in the Common Provisio n s regulation) at the source that 

### it have the potentia l to emit the PAL pollutant. I I.A.3 . Air Qual ity Related Va l ue ange i n a ir quality. Examp les i nclude flora, II. A.4. Basel i ne Actua l Em ission The rate of emi ssions. i n tons 

### eryear, of a re gula ted N pol l utant, as determined i n accordance w ith Sections II . .4 . a. throug h II.A.4 .d. below . II.A.4.a . For any isti ng e lectric uti lit y steam gene r ati unit (as defined in Section I I .A.1 4 of this part), baseline actual emiss ions eans the average rate , in tons er yea r , at which the un it actually em itted t po ll utant during any co ecu tive twenty-fou r mon th period se lected by t e ow ner or operator w · in the five year period im m ediately p reced i ng wh n the owner o r operator

egins actual constructi on of the project. The Division all allow the use of a d iff erent time period upon a determ i nation that it is more epresentative of norma l source ope ratio n . II.A.4.a.(i) T he average rate sha ll include fugitive emiss1 ns to the exten t q uantifiab le , and emiss ions associated with sta shutdowns, an d ma lfu n cti ons. II.A.4 .a . (ii) The average rate shall be adjusted downward to ex non-comp l iant emissions that occurred while the source was operat i ng above any em ission limitation that was lega lly enforce during the consecutive twen ty-four month period. 

### CODE OF COLOR A

DO REGULATIONS 5 CCR 100 1-5Page 118 5 CCR 1001 - 5

II.A.4.a.(iii) For a regulated NSR pollutant. when a project involves multiple emissions units, only one consecutive twenty-four month

period may be used to determine the baseline actual emissions r the emissions units be in g changed. A different consecutive tw tyfour month period can be used for each regulated NSR poilu nt. II.A.4 .a.(iv ) The average rate shall not be based on any con cutive twenty - four month period for which there i s inadequate · formation for determining annual emissions . in tons per year. a for adjusting this amount if required by Section II.A.4 . a . (ii) . b . For an existing emissions unit (other than an electric util' steam generating unit), baseline actual emissions means the average ra . in tons per year, at hich the emissions unit actually emitted the pollula during any sec utive twenty-four month period selected by e owner or operator wit ·n the len year period immediately preceding ither the date the owner or oper or begins actual construction of the proje , or the date a complete permit plication is received by the Division r a permil required under this

Part D . e ceptthal the ten year period shall ot include any period earlier

\ha n Nove ber 15 , 1990 . II.A. 4 .b.(i) The average rate shal nclude fug i t ive emissions to the extent antifiable. and emis 1 ons associated with startups. shutdow . and matfunctio s. II.A.4.b (iii) The av rage a t e shall be adjusted downward to exclude any emissions lh would li ve exceeded an emission limitation with which the jor stationa source must currently comply. had the major sta · nary source b n required lo comply with such limitations during t consecutive twen - lour month period . However. if an emiss· n limitation is part or a aximum achievable control

tech ology standard contained · Pan E ol Regulation Number 8, the

ba l ine actua l emissions need o ly be adjusted if the Stale has

I en credit for such emissions re ctions in an attainment emonstration or ma intena n ce plan . . b.('iv) For a regulated NSR pollutant, hen a project in volves multiple emiss i ons units. only one consec live twenty-four month

period must be used to determine the . base· e actual emisstons lor the emissions units being changed . A differe consecutive twentyfour month period can be used for each regula d NSR pollutant. II.A.4 . b . (v) The average rate shall not be based on a consecutive twenty -four month period fo r which there i s inadequ e i nformation for determining annual emissions, in tons per year. a for adjusting lhis amoun t if required under Sections II . A.4 . b . (ii) and I . .4.b . (iii) of lhis part. CODEOFCOLORADOREGULATIONS

- -r 2013 Slate ofColomdo /\II Rights Reserved 

### 36 CR 1 and 2, 0 1 -13 Page 119

II.A.5.

II.A. 6 . II.AA.c. For a new emissions unit , the baseline actual emissio n s for purposes of determining the emiss ions increase that will resu lt from the initial constru o and operati on of such un it sh a ll equal zero ; and thereafter, for all other pu rposes, shall equa l the un it's potential to emit (as defined in Section .8.37 of Pa rt A of this regulation ). II.A .4 . d. For a PAL fo r a major stationary source, the baseli ne actual em i ions shal l be calcu lated for existing elect ric uti lity steam generatin g units · acco rdance with the procedu res con tained in Section I I .A.4 . a. , for other e sting emissions units in accordance with the procedures con ta in in Secti on I I.A.4.b., and for a new emissions unit in accordance with e proced ur es con ta ined in Section li.A.4.c. II.A.5 .a . An intrast ate area (and every part thereof) desi ated as attain ment or unci sifiable under Sections 107(d) (1 )(A)(ii) o (ii i) of the Federa l Act i n wh ich e major source or ma j or modification stabl ishing th e m i nor source baseline ate would construct orwo uld hav an air q uality i mpact fo r the poll uta nt which the baselin e date is es b l ished, as fo llows : equal to or greate r tha ne microgram/cubic meter. 1 ).lg/m3) (annual average) for S02, N 02, o M1 0; or equa l to or gr ter than 0 . 3 )Jg/m3) (annua l average fo r PM2.5. 1 07(d)( 1)(A)(ii) or ( i ii) of the Federal Act II.A.S .b.(i) II. A.S.b . (ii) Is sub · ct to is Part D , and wou ld be co n stru cted in the same state repos i ng the redesignation . II.A.5.c. Any basel ine are es tablished orig ally for th e total suspended part iculate increments sha rema in in effect an h all app ly for purposes of determining the a mount o[ vailable PM1 0 i ncrem ls, except that such base l i ne area shall not re ain i n effect if the permi t au ority rescinds the corresponding minor sou e base li ne date in accordance ith Section II.A 25.c. The ambien t conce ration l eve l that exists i n th e baseline area a the ti me of the applicable minor sou r ce bas ine date. A baseline concentrat ion is dete rmi n e for each pollutant for which a minors urce base line date is estab li shed and sha ll incl ude : .a. T he actua l emissions represen tative of sources i n exist ce on th e appl i cab le minor so urce baseline dale, except as otherwi provided in this defin ition; and II.A.6 .b. The all owable em iss ions from ma j or stationary so ur ces th at co menced construction befo re the major sou rce baseline date, but were no ·n operatic by the applicab le m i nor source baseline date . II.A.6 .c. The fol lowing will not be inc luded in the baseline concen t ration and w1 the applicable maximum all owable i ncrease( s): 

### CODE OF COLORADO REG ULATIONS 5 CCR 100 1-5Page 120 I I.A.6 . c . (i) Ac tu a l em i ss i ons f r o m any ma j or s t ationary source on whi cons tr uctio n co mm e n ce d a tt e r t he major source baseline dat e : a II.A . 6.c.(ii) Act u a l e m ission i n creases arnd d ecreases at any s t ati source occurring a tt e r t he mino r source basel i ne date . Begin Actual Cons t wc t ion In it ia t ion f p h ysical on-site cons tr uct i on ac t iv it ies on an em i ssions unit that a of a permanen a t ure . Such activit i es Include, bu t a r e n ot l i mited to, installation f building

supports an founda t ions, laying o f un de r ground pipe wor k , and construe· n of permanent

storage struc t es. Wi t h respect t o a cha n ge in the me t hod o f opera t ion is term refers to

those on-si t e ac 'vities o(her than prepara t ory ac t ivities tha t mark the i tiation of the change . II.A.8 . Best Availa le Control Technology (BACT) An emission limi t a t ion · elu d i n g a visible emissions standard) degree of red u ction o f e h regulated NSR pollutant t hat wo , be emi tt ed from any proposed major stationary ou r ce or major modification tha he Division or Commission, on a case-by-case bas i s. taking i o acco u nt energy , environm ntal, and economic impacts and other costs. determines is ac tf vab l e f o r s u ch source or odi f ica t ion through application of produc t ion processes or avai l atl me t hods, systems, d techniques , including fuel c l eaning o r treatment or innova t ive fuel co bus t ion t echniq u e for control of such pollutant. In no eve n t shall application of the best a ailab l e control chnology result in emissions of any pollutant that wo u ld exceed emission a ll owed b he applicab l e standards in the Code of Federal Regula t ions. Ti tl e 40, P arts 60 nd 61 egulation N umber 6, Part A, and Regulation Number 8 , Part A) as in effec t on the eff t i v ate o f th i s cla u se, but not including later amendments , u n less s u ch amendments a pecifica ll y i n co r porated by re f e r ence in

accordance w it h t he provisions of Colorad evised Sta t utes Section 24-4-103 (12.5). I n for m atio n as to the availability of such an rds may be obtained from the Direc t or, Ai r Pollution Cont r ol Division, Colorado D a rt men of Publ i c H ea lt h and Environment. 4300

Cherry Creek Drive South, Denver, lo r ado 80 6-1530 . I f the Division or Commission de l r m i nes t ha t t echn gica l or economic lim i tations on the application o f measuremen t me odology to a particul em i ssions un i t would make the i mposit i on of an emissions st dard i nfeas i b l e , i t may in t ead prescribe designs, equipment, work practices, operationa l andards or combination ther of, to satisfy the requirement for

the applica t ion of bes t a v a· ble contro l t ec hn ology . Such s ndard shall, to the degree possible. se t forth thee ·ssions reduction achievable by imp mentat i on of such design. equipmen t , work pract i**~** or operation and shall provide fo r co liance by means that

achieve equivalent re ul t s. Any tech n olo , includifl9 techno l ogies applied at the pre-combustion. mbustion, or postc ombustion age, at a new or existing facil i ty that will achieve significan t . du c t ions in air emissions f sulfur dioxi<le or oxides of n it rogen associated with the ut i liza t n of coal in the

generati o f electricity, or process s t eam which was not in widespread use of Novembe r 15, 199 . 5 CCR 1001-5 CO D E OF COLORADO REGULATIONS

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### 36 CR 1 and 2, 01-13 Page 121 II.A.10. Clean Coal Technology Demonstration Project A pro j ect usi ng funds appropriated und e r th e heading " Departmen t of Energy -C lean Coal Technology," up to a tota l amount of $2 .5 bi llion for commercial demonstration of clean oal

chnology, or simi l ar projects funded through appropriation s for the U.S. EPA. The fe e ra l co tribution for a qu al ifyi ng project shall be at least twenty percent of the total cost the dem nstration project. In referenc to a n app l ication for a major N S R permit, an appl ication th at c tain s all the information n essary for processing the applicatio n. Oesi9nating an apP. catio n complete for purposes of pe it processing does n ot preclude th e Division from req sting or accepti ng any additiona l in rmation . II .A.11.a. At a minimum, a complete application for permi t to const ruct a major ource or major mod ificat ion subject to th r equ iremen ts of this Part D shall in de: II.A.11.a.(i) All on itorin g data required pursu nt to th i s regulat ion and an analysis of a bient air qual ity i n accord c e w ith Section VI.A.3. of th is part;

I I.A. 1 1.a. (i i i) A report of the r e VIII.A.1 . of Part A ; II.A.11.a. (iv) 1on that the roposed technological system of con tinuous emissi red ucti on th a ·s to be used will enab le such source to comply con tin uo ly with th e standa s of performance that are to app ly to s uch source a that th e em i ssion inp I s to th e model for th e impact analys is are equivale to the emissio ns allowed such standards of performance; II.A.11.a.(v) s that will be insta ll ed to mo nitor e emissions of each po ll uta nt that · I be em itted in signi fi ca nt amou s. maintaining such devices or systems. nd the schedu le and format for r orting th e r esu lts of such emiss ion mo n itor g to the Division; II.A.11.a i) The additional i mpact ana lysis required by S ction VI.A.6 . of thi s art, any demonstr ation of facts needed to establish a I ai m by the appl icant to qua l ify for any exe mption or exclusion under Section .B. of th is part ; A schedu le of constructi on i n accordance with Sect1 n III.G . 2 . of Part I I .A.11.a.(viii) A n add iti ona l co py of th e application for th e fed e ra l land anager of each affected Class 1 area, for the U .S. EPA. for the coun ty Comm sioner, a nd for public noti ce (county clerk). Two add itional copies shall be su mitted for i nterested p ublic g roups.



### CODE OF COLORADO REGUL ATIONS 5 CCR 1001 -5Page t2 2 II.A . 1 2. Construction Any phy si cal change or change in the method of operation (including fabrication. erectio · nstallation. demo ht ion, or modification of an emissions unit) that would result in a chan a tual emissions . Any part fa stationary source that emi t s or would have the potential to emit NSR poilu nt and includes an electric steam-genera ting unit as defined in

this part. Fo purposes of this Part D, there are l\No types of emissions uni y regulated ction II.A.14 . of described in Sec tion II . A.1 .a. and II.A.13 . b ., below . A new emissions uni t is any emissions unit t at is (or will be) newly tructed and that has exis t ed for less tha n two ars from the dale such

ions unit first operated. II.A . 13 b . n existing emissions unit is any emi ions unit that does not meet !he requir ents in Section II.A . 13 .a . . abov . A replacement unit (as defined i n Section I . .39 . of this part) is an existi emissions unit. I I. A . 14 . Any steam electric generating unit at is construct t1 for the purpose of supplying more than one-third of i t s potential electrical out ut capacity nd more than twenty-five megawatts electrical ou t put to any utility power dis ibu tion stem for sale . Any steam supplied to a steam distribu tion sys tem for the purpos of P. v1ding steam to a steam-electric generator

that would produce electrical energy for s 1s also considered in determining the electrical energy output capacity of the affected faci · ll.A.15 Federal Land Manager (FLM) Wi t h respect to any la nds of the U ecretary of the depar1ment with authority over such lands . II . A.16. High Terrain Any area hav1ng an elevar n nine hundred feet or more ab e the base of th e slack of a source. Either a flare use to compl y with an applica b l e new source perform ce standard or maximum achi able control technology standard (including uses of n es during startup, shutdown. or alfunction permitted under such standard), or a nare that erves to control emissions o waste streams comprised predominately of hydrocarbons an containing no more than 30 mg/dscm hydrogen sulfide. An system of air pollution control that has not been adequately demonstrated in p ctice. but uld have a substantial like lihoo d of achieving greater continuous emissions reduc · n than

ny control system in current practice or of achieving a t least comparable reductions a lower cost in terms of energy, economics. or non-air quality environmental impacts. 5 CCR 1 001- 5 CODE OF COLORADO REGULATIONS0 2013 State ofColorado All Righ ts Resel"'led 

### 36 CR land 2, 01-13 Page 123 I I.A.19 . Low Terrain Any area other than high terrain .

. 20 . Lowest Achievable Emiss io ns Rate (LAER) y source. the more stringent rate of em issions based on the follow i ng : The most stringent emission limit conta i ned in any st e implementation p lan for such class or category of stationa ource, un less the owner or operator of the proposed stationary source monstrates that such limits are not achievable; or II.A.20.b. The most stringent emiss ion limitation that i achieved in practice by su h c lass or category of source. In no event shall ppllcation of the term pe ' I a proposed new or modified stationary so ce to emit any pollu tant in exces of the amount allowable under an appli ble new source perform nee standard (Regulation Number 6 . II.A.21 . a . Any e ·ssions unit that emits r has the poten tial to emit one hundred tons pe ear or more of th AL pollutant i n an attainment area ; or II .A .21.b . its or has the potential to emi t the PAL pollutant in an amoun hat is e al to or greater than the major stationary source threshold (as de ed · Section II.A.24 . of this part) for th e PAL pollutant 

### for nonattainme reas . For example, i n acco rdance with the definition of a major statio source (as defined in Section II .A . 24 . of th is part) , an emissions unit oul be 

### a major em iss ions un it for volati le organ ic compounds if the em i ions u · is located in an ozone nonattai nment area and emits or has the otential to m it one hund red or more tons of vo c per year. II .A.22. Major Modification Any physical change in or c nge in the method of opera n of a major stationary source that would result in a signi cant emissions increase of a reg lated NSR po ll utant and a significant net emissions ncrease of that pollutant from the m ·or s tationary source . II.A.22 . a. Any sign ificant emissions increase from ny emissio ns units or net em · s ions increase at a major stationary source t ti s sign ificant for volatile o an ic compounds or NOx shall be considered sig 'ficant for ozone. I n the Denver Metropo litan PM10 nonattal nme area , any net emission increase that is significant for su !fur d ioxide or · rogen oxides shall be considered significant for PM1 0 . .A.22 . c . A phys ical change or cha nge i n the method of operati include routine maintenance, repair , and replacement. II.A.22 . d . A physical change or change in the method of operation , u ess previously li mited by any enforceable or fede rally enforceable perm it condit ion that was established after Janu ary 6 , 1975 for sources in atta i nment or unclass ifiable areas and after December 21 , 1 976 for sour s i n nonattainment areas , shall not include : 

### CODE OF COLORADO REGULATIONS 5 CCR 1 001 -5Page 124 II.A . 22.d.(i) Use o f an alternative fuel or raw ma t erial by reason of an o rd er in effect under Sections 2(a) and (b) o f the Federal Energy Supp l y and Environmental Coordination Act o f 1974 (or any s upe rseding legislation), a prohibition under the Power Plant a Industrial Fuel Use Act of 1978 (o r any superseding legi slatlo or by

reason of a natural gas curtailment pla 1 n In effect pursuant I the Federal Power Act; II.A.22.d.(ii) Use of an alternative fuel because of an order Section 125 of the Federal Act; II.A . 22 . d . (iii) Use of an alterna tiv e fuel at a steam-gen rating unit to the exlen llh a t the fuel is generated from municipal olid waste; I.A.22.d.(iv)(A) th e stationary so urce in nona tt ainment area was capable of accommodating pri to December 21, 1976, unless such change would be P. ohibi l ed under a federally en forceable permi t condition, r II.A.22.d.(v) An increa i the production rate, unless such change would be prohibi d un r a federally enforceable permit condi tion; II.A .22. d . (vi) An in re ase in the ours of operat i on, unless such increase would be pr hibited under a derally enforceable permit cond iti on; or II.A.22.d.(v i i) II.A . 22.d.(v") The ins t alla ti on, operation. c salion, or removal of a 1 porary clean coal technology demo stration project, if the project omplies wi th : II.A.22.d.(vi ii)(A) The Colorado Sta t e lmplem ntation Plan, and ltA.22 . d.(viii)(B)Other requirements necessary allain and main t ain the National Ambient Ai r Quality S l andar during the projec t and after it is terminated. II.A.22.d.(ix) For major stationary sources in attainment are s: 5 CCR 1001-5 CODE OF COLORADO REGULATIONS-0 20 IJ S tate of Colorado 1\ II Rig)lls Reserved 

### 36 CR 1 and 2, 01-13 Page 125 II.A.22.d . (ix)(A) The installa tion or ope ration of a permanent clean coal technology demonstration project that constitutes repowering, provided that the project does n ot result in Increase in the poten ti al to emit of any regu lated poll nt em itted by the unit. The exemption shall apply o a pollutantby

- pollutan t bas is. II.A.22.d.(ix)(B) The reactivation of a very clea coal fired electric uti l i ty steam generating unit. The react ivation of a very cle eneratin g unit. II.A.22 .e .

II.A.22.f. Emissions c sed by indir t sources of pol l ution, em i ssions from interna l combust' engines on any v icl e, and emissions resulting from temporary co ruction or exploration ac · ities shall be excluded in hether a major modification w occur. Em i 10ns from on-go i ng constructio n are n ot con · ered to be tempo rary e 1ssions. and are Included in det ermining whether ajor modification will occur. Fugitive emissions from the listed sources in Section II. A .24.a. d any olher stationary source category that, as of August 7, 1980 was regulat Sections 1 11 or 112 of the Federal Act (as adopted In Regu lations . 6. Part A, and 8, Parts A and E ) shal l, to the extent quantifiable , be consi in ca lculating th e potential to emit of the mod ification. II .A.23 . Major Source Baseline Date In the case of PM10 and su lfur dioxide. Jan I n the case of nit rogen dioxide, February II.A .23.c. In the case of PM2.5, October 20, 2010. For the purpose of de termining whether a source in attainment o r lass ifiab le area is subject to the requirements oft art D. major stat io source means:

4.a . (i)(A) Fossil fuel-fired se e lectric p l ants of more than 250 million B ri tish therma l un its p II.A.24.a . (i)(B) Coal cleaning plants (with therma l drye 

### CODE OF COLORADO REGULATI ONS 5 CCR 100 1-5