' ' > c UNrTE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y

f ^ '\ ^ REGION S 159 5 Wynkoo p Stree

t DENVER . C

O 80202-112 9 Phone8(»-227-891 7 http://www.epa.gov/region0 8 "• ' f>p.oo Ref : 8P-A R^ I ? 20t n Bria n Gustafson , Administrato r Air Qualit y Progra m Sout h DakotaDepartment

o f Envirorunent

an d Natura l Resource s 52 3 Eas t Capito l Avenu e Pierre , S D 57501-318 2 RE : EPA Preliminat y Comment s on Augus t

201 0 Draf t Regional Haz e State Implementatio n Pla n (Publi c Comment

Version ) Dea r Mr . Gustafson : EP A ha s complete dapreliminar y revie w o f

Sout h Dakota' s Augus t

201 0 draf t Regiona l Haz e State Implementatio n Pla n (SIP) . Ou

r comment s an d question s ar e detaile d in Enclosure s 1 throug h 3 to thi s letter . W e understan dtha

t you inten dt o conside r

all comment s receive d o n thi s publi c comment versio n o f th e Regiona

l Haz e SI P prio r

to finalizin g an dadoptin g th e document s fo r submissio n t o EPA . W

e emphasiz e tha

t w e wil l onl y reac h afma

l conclusion , and perfor

mour complete review , regardin g th e adequac y o f Sout h Dakota' s Regiona

l Haz e SI P when w e ac t

o n th e Sout

h DakotaRegiona

l Haz e SIP revisio n throug h our ow n publi c notic e and commen t mlemaking . W e look forwar dt o continue dcommunication s t o resolv e th e remainin g concem s wit h th e Regiona

l Haz e SIP . I

f yo u hav e an

y question s o n EPA' s comments , pleas e contac t me a t 303-312-6434 , o r

your staf f ma y contac t Gai l Fallo n at

303-312-6281 . Sincerely , 

# X ' ' - ^ ' / ii-——Cani e A . Videtich , Directo r Ai r Progra m Enclosure s cc : John Bunyak , NP S Sandr aSilva , USFW S Thoma s Dzomba , USF SENCLOSUR E 1 EP A Regio n 8 Preliminary Comment s o n th e Augus t201 0 Draf tRegional Haz e SIP (Publi c CommentVersion ) Summar y o f Majo r Concem s - (se e detaile d comments fo r more information) ;

• Man y comment s fro

mou r Marc h 12,201 0 letter

wer e no t sufficiently addressed . Al l o f th e detaile dpreliminar

y comment s belo w pertai n t o thos e previou s comment s and provid e additional informatio n o n area s whic h are stil l problematic . • Insufficien

t detail s wer e provide d o n ho w th e bes t availabl e retrofi t

technolog y (BART ) emissio n limit s wil l b e mad e enforceabl e a s apractica l matter . Se e conunent s #1 , # 4 and #7 below . aN o identificatio n o f

th e number

o f year s t o reac h natiu ^ condition s wa s provide d a s require dwhen th e Reasonabl e Progres s Goa l i s les s tha

n th e Unifor

mRat e o f Progress . Se e comment s #5 an d# 8 below . • N o four-factor

Reasonabl e Progres s analysi s wa s completed . Se e comment # 6 below . • Recommen dreviewin g ARS D regulatio n reference s fo r typographica

l error s throughou t bot h th e respons e t o comment s (fo r futur e clarit y i n th e SI

P record ) a s wel l a s th e main SIP dociunent . There ar e numerou s error s likel y du e t o th e additio n o f 74:36:21:06 , whic h change dth e numberin g o f th e subsequent

chapters . Detaile d Comments ; 1 . Executiv e Summary , pp . vii-viii : Additional detail s are necessar y t o ensure tha

t BAR T emissio n limit s wil l b e enforceabl e a s apractical matter . Th e BAR T emissio n limits , complianc e schedules , monitoring , recordkeeping , an d complianc e determinin g method s fo r Bi g Ston e I mus t

b e specifie din th e tex t

o f th e Regiona

l Haz e SIP o r

i n apermi t

tha t i s incorporate dinto th e SIP . Fo r example , in your

respons e t o our

comment o n thi s issu e (# 1 an d #3 9 fro

mAppendi x D) , yo u relie d heavily o n requirement s o f your Titl e V progra

m (ARS D 74:36:05) . A s thi s progra mi s no t par t o f th e SIP , our

concem s wit

h relianc e o n th e Titl e V progra

min thi s are aremain . Tw o example s o f al l th e variou s element s o f adequate languag e tha

t wer e coordinate dwit

h th e State s o f

Wyomin g an d Colorad o are provide d in Enclosure s 2 an d3 fo

r reference . 2 . Tabl e 6-9 , p . 91 : Footnote 5 reference s a199 9 EP A Techiucal Bulleti n on NO x control s a s justificatio n fo

r th e 35%-90 % contro l efficiency rang e fo r th e to p thre e options . Th e larg e rang e i n EPA' s bulleti n i s du e t o inclusio n o f selectiv e catalyti c reductio n (SCR) , selectiv e non-catalyti c reductio n (SNCR) , and fue l rebumin g fo

r wet-botto mboilers . I

t i s well documente dtha

t SC Rachieve s th e hig h en d o f th e range . Th e EP

A bulleti n als o list s a30%

- 70 % contro l efficienc y fo

r agroup o f

temperature-reducin g controls , includin g over-fir e air . Therefore , th e propose dBAR T determinatio n o f

SC Rplu s separate d over-fir e ai r (SOFA ) shoul db e better

tha n th e 90 % contro l efficienc y o f SC Ralone . In you r

respons e t o thi s comment (#3 1 fro mAppendi x D) , there wa s n o discussio n regardin g ho w th e additio n o f 1SOF

A woul dno t

contribut e t o abetter

than 90 % contro l efficiency . Thi s need s t o b e addressed . 3 . Sectio n 6,3.5 , BAR

T Emission s Limit s fo

r Bi g Ston e I , pp . 99-103 : In order fo r EP A t o entertai n th e establishmen t o f separate BAR

T limit s fo

r startup an d shutdow n conditions , a n adequate recordshowin g tha t th e otherwis e applicabl e limit s are no t achievabl e an d tha

t th e separate startup/shutdow n limit s constitute BAR T i s require d a s justification . You r respons e t o thi s comment

(#3 8 fh} mAppendi x D ) doe s no t provid e sufficien

t justificatio n fo

r establishin g th e separate startup/shutdow n limits . W e continu e t o offe r t o wor k closely wit

h yo u t o establis h appropriate 30-da y rollin g averag e emission s limit s fo r particulate matter , sulfii r dioxid e an dnitroge n oxide s tha t allo w fo r startiqi/shutdow n condition s t o hel p ensure SIP approvability . 4 . Sectio n 6.4 , BAR

T Requirements , p . 103 : Accordin g t o your propose d revision s t o th e Sout h DakotaAdministrativ e Rules , Chapter 74:36:21:10 , apermi t

modificatio n wil l b e require d fo r your BAR T determinatio n o n Otter

Tail' s Bi g Ston e I . Without seein g th e detail s o f

suc h permit , it i s difficuh t o determin e whether thi s sectio n o f

th e SIP adequatel y addresse s requirement s fo

r enforceability , includin g appropriat e averagin g times , complianc e verificatio n procedures , an drecordkeepin g an d reportin g requirements , and proper operatio n an d maintenanc e procedures . A s note d in commen t # 1 above , thes e requirement s mus t b e specifie deither

in th e tex t

o f th e Regiona

l Haz e SI P o r

i n apermi t tha t i s incorporate d into th e SIP . Your

respons e t o thi s commen

t ( #3 9 fro mAppendi x D ) relie d heavily on you r Titl e V progra

mwhic h i s no t

par t o f th e SIP an d doe s no t

full y addres s thi s issue . 5 . Sectio n 7.2.1 , Breakdow n o f CMA Q Modelin g Results , pp . 106-107 : You r respons e (#4 7 fro mAppendi x D ) addresse dmos t o f ou r question s wit

h on e exception . Th e SI

P mus t provid e th e number

o f year s necessar

y t o reac h natural conditions , a s require d b y 4 0 CF R 51.308(d)(l)(ii ) whe n th e reasonabl e progres s goal (RPG ) i s les s tha n th e unifor

mrate o f progres s (URP) . Whil e yo u state i n Sectio n 10. 3 on pag e 127 tha t you believ e Sout

h Dakota ca n stil l mee t

th e reasonabl e progres s goal s an d achiev e natura l condition s b

y 2064 , th e data , a s currentl y presented , doe s no t suppor t thi s propose d conclusion . 6 . Sectio n 7.2.2 , Four

Facto r Analysis , pp . 107-109 : DENR' s determmatio n tha t afour-factor analysi s i s no t

warrante da

t thi s time i s no t

acceptable . A four-facto

r analysi s mus t

b e complete din establishin g th e RPG s fo r Clas s I area s impacte d b

y Sout h Dakotaemissions , a s wel l a s i n justifyin g aRP G tha t i s les s than URP . Despite your respons e t o thi s comment (#4 9 fro mAppendi x D ) regardin g minima l contributio n fi-ompoint

source s t o visibilit

y impairment , afour-factor

analysi s i s require d t o Justif y thi s conclusion . Again , w e sugges t lookin g fo r additional reduction s fi-omGC C Dacotah , Ben French , and Pet e Lie n a s wel l a s th e potential fro

mth e clos e proximit

y o f Rapi d Cit y t o Badlands . 7 . Sectio n 8.5.6 , Enforceabl e Emissio n Limit s an d Contro l Measures , p . 116 : Thoug h thi s sectio n wa s slightl y reworde dper you r respons e (#5 6 fro

mAppendi x D) , your

intentio n to establis h th e Bi g Ston e I BAR T limit s and contro l measure requirement s in a n a h qualit

y permi t require s th e permits ' incorporatio n into th e SIP . Th e Sout h Dakotadraf

t constructio npermi t progra mregulation s ar e currentl y under revie w b y otu

- office . Unti l thi s ha s bee n approve dmto th e SIP , it

mi l no t b e appropriate to rely upo n th e progra mfo r your BAR T permits . Sectio n 10.3 , Publi c Input , pp . 126-127 : A s note d i n comment #5 above , th e SIP mus t provid e th e publi c wit

h acalculatio n o f

th e number

o f year s require d t o reac h natural condition s i f

th e RP G provide s aslower rate o f improvement

than that neede d t o attai n natural condition s b

y 206 4 pe r 4 0 CF R51.308(d) ( 1 )(ii) . We understan d you r concem s regardin g assumption s fo

r other state s include d in th e WRA P analysis ; however , thi s SIP mus t includ e your

bes t estimate o f

number o f year s t o reac h natura

l condition s wit

h th e propose dRPGs . Though thi s sectio n wa s slightl y reworde d per you r respons e (#4 8 fro

m Appendi x D) , th e number

o f year s i s stil l lacking . ARS D Chapter

74:36:21:12 , Federal Lan d Manage r Notificatio n and Review : You r respons e (#6 5 fro mAppendi x D ) di dno t

adequatel y addres s our

conce mrelate d t o FL

M consultatio n on BAR T permi t reviews . A s require d b

y th e Regiona

l Haz e Rule , th e Federa

l Lan d Manager s mus t

b e provide da60-da

y consultatio n perio d prio r t o an y publi c hearin g o n th e Regiona l Haz e SIP . Sinc e aBAR

T permi t i s a n integra l par t o f th e Regiona

l Haz e SIP , thi s 60-da y consultatio n perio dmus t exten d t o FL

M BAR T permi t revie w a s well . I

n addition , sinc e an y BAR T permi t mus t b e incorporate d into th e Regiona l Haz e SIP , th e 30-da

y publi c notic e fo r th e SI P need s t o identif

y th e inclusio n o f

an y BAR T permits .ENCLOSUR E 2

EP A Region s - [Preliminar y Comment s o n Wyoming' s Regiona l Haz e Monitoring, Recordkeeping , an d Reportin g Requirement s (MRR ) Pleas e note : Thi s documen t i s divide dint o tw o sections . Th e first sectio n provide s comment s o n th e curren t

MR Rlanguag e in th e State' s Regiona l Haz e SIP . We hav e include d comment s (in italics ) an d i n som e instance s suggeste dlanguage . Th e secon d sectio n o f thi s documen t contain. s informatio n o n SI P MR Relement s tha t

nee d t o b e adde d t ath e SI P an d suggeste dlanguage . I I . Curren tSI P Languag e fo r Pacificor p Uni t Th e Stat e of

Wyomin g consider s th e contro l effectivenes s of acontro l technolog y t o b e equivalen t

t o th e BART-determine dpermi t limi t ..^ aml.ihi c \ \(H.K:\% . I h e Male siuHil J cluum c Ihc prL^^:c(iln

^ wmenc c to roa

d"th e .Slat

e t> l W yumin ^ unisidcr s lli c BAR1

- Jclcrniiiici l IXTT!:: ' ' , ' ' • • • ' • ; i *• • : i

" , i ' !i'5rl]ni.'lL'j;i The limit is ba.sed on continuous compliance when Che contrcl equipment

is well maintained

and operated in a mannerconsistent

with gaod

airpollution control

practices forminimizing emissions, iiu- .),ii' inu.^t nuitiuw iiiui iiu- .V/i</n' \uu ^i.>iHpi\ ,\nn U.\H1 ui

. • i/n l\. hfliiuj I iahl f W Unit-by-uni tBAR T determination s fo r NO x an d PM/PMio : Uni t 3 PM/PMioi. . 4 P.M/PMioc . Pollutant

Contro l Typ e NO x LNB/OF

A Fabri c Filte

r 0.01 5 NOx LNB/OF

A Fabri c Filter

0.01 5 Ib/MMBt u 0.2 8 (3()-da y rolline ) 42. 1 0.1 5 (.10-da

y rolling ) 61. 5 Ib/h

r 78 4 (.10-da

y roiling) 61 5 {.lO-da

y rolling ) tp y

3.43 4 18 4 2.69 4 26 9 III . Expeditiou s Installatio n an dOperatio n o f BAR T U w Srnh ' luti h l o induiil f i n llii. \sri . tin n tlui i il w li.'\RTdciermnuittn n I. s ilfrh'nJtri i o n r/f)/'rii i ti l l>

\/:/ ' t Ih c Siiii f

iiiii\ l als o prinidi

- . i dal f I n " h n I

t il'. f \our , < • nn'tl s U > tiwial l iin d t oni/i h I I ni l ll w ll.\K r

limils , no i iiis i il w rfi/uinnifn i l o insud l il u iifttipnwn! . /'('/ " Il w 1{.\R I (iiiidrlincs , \oiint. \slund j insttd l it>nlrol \• .../•'.,. ' • priHihiddv . hu t n o IUII T iliiinjn,

- uyit' , iiji , r

l\l' \<ii>pro\ii

i ll f ih f S W Th e Stat e o f

Wyomin g pnnxi^c s tha t PacifiCor p in.stal l ne w lo w NO

x bumer s wit

h advance dOF A o n Unit s 3 an d 4 , i n accordanc e wit h th e Division' s BAR T determination , an dconduc t th e require d initia l performanc e test s n o late r tha n Decembe r

3! , 201 0 an dDecembe r

31 , 2009 . respectively . Th e State o f Wyomin g tha

t PacifiCor

p instal l ne w full-.scal e fabri c filters o n Unit s 3 an d 4 , i n accordance with the Division's BART determination, and

conduct the initial

performance tests required

no later than December

31, 2010and

December

3!, 2012, respectively. _^^ iHiioiimini I- U'sttm:. liw ii(>nlicaidi' t.f'.X test nicilwd niiisi he sptu ificd

cdimv \\iili ihr irftiiitiHV (<l U'siinM and oilier irh'vani infornuilion.IV . Prope r Maintenanc e an dOperatio n o f Contro l Equipmen t .\ [ al l liinc

N iil'le r th e cmiiphanc e deadlin e specifie di n Kspefif v sectionll . ili c tmncr/o|)craiu r

o f eac h B.A K I uni t shal l maintain , eaiihnite . an d t)perat e aC'LMS , i n lul l complianc e wit

h th e requirement s foun d at 4 0 CF Rpar

t 7.S , l o aecurate K

mea.sur e SOI . NOx , diluen t

iCO ; o r Oo . an dslac k

ija s \t>lunielri c Ho

w ral e Iro meac h B.AR l unil . th e ( |;M S shal l b e use dU

i detennin e ccmpliunc c wit h tli e SO I an d .NO

x B.A K I ciius.siti n linut s lo r eac h B.XR

I uni l I n deierniinini ; eonipiiane e wil h ih e S()2 an dNO x BAR l liniiis . al l IXTJIKI S t)teniissii)ii s shal l tx. - included , inclmimi ; slarlups . sluiulnwns . emergencies , .uu J riiallunelnin s \()Ti:: l\r

section .W2(k) of

the ('\.\. liXRT

litnit<i must

he nut coiitinn(H4\lv. The ii.i K /' limits section of

ihe SI!' need to state that

the tt \ K T limits appl\ nt

all limes, tncliidini: periods of

SSM. The State of

Wyoming :ini[T<»se- that PacifiCorp conduct

initial NOx performance tests on Units 3 and

4 after the installation of

low NOx burners and

advanced OFA, within 30days of achieving a maximum design rate, but not later than 90days following initial start-up. /

or ^.,. ; '...;;, ...::.,,.: J^J-^- • '•^-^'-- 1--- _- -_j. ^- il-- -A -L ''J LLIIK l'requenc\

of icMina and other reicvoni infornuition. Owner/operulu r

shal l suhmi l report s u l aii \requirct l }V'i'"". i ^ i , . l i vi , i,. i \ ( i

v wilhi n hOe.ilenda r

il.iNs aftei mmpleluM i u l ih e tcs i If amaximu mdesig n rat e i s not achieve dwithi n 9 0 day s of start-up . th e AQ D Administrato r ma y requir e testin g b e don e a t th e rat e achieve dan dagai n whe n u maximu mrat e i s achieved . . ^ ^ "ii i > " • • < i ' ' • ' init . Il l thepr t vhni \st/i.'»vur >\iti i dui H ' . I I ainaxiinun i desiji i lal e i s im t .lehievetl withi n 'X I dav s o t starl-up , ih c AQ D Admniisinilo r shal l requir e lesiin e he tlon e .i i th e lal e ayhir ' I i : ! . •. - i- : .,,,;..,....,.,. . . i,.. . . i A tes t protoco l shal l b e submitte d for Divisio n approva l prio r

t o testin g an dawritte n report o f th e tes t result s shal l b e .submitted t o th e Division . Testin g require db y th e WAQS RChapte r 6 . Sectio n 3 operatin g permi t r I • \i.i.yi < • ii.ij'u I '» . sccin' O - »'

i sci.>iiii i - * ma y b e submitte d t o .satisfy the testing required, llic prior u nient e i\ o relcrcm e to all

lIu o;u r.iiun^lunnu rci{uUtti<ms. fhis needs to he replaced with a provision iliat

will he in die SIP. Th e Stat e o f

Wyomin g propos e tha t PacifiCor p conduc t

initia l PM/P M 1 0 performanc e test s o n Unit s 3 iin d4 afte r th e installatio n o f

fabri c filters withi n 3 0 day s o f achievin g a maximu mdesign , rate , bu t no t late r than 9( ) day s followin g initia l start-up . performanie ttstim:. the upplicahle El'A test method must he specified

alon\i with the treipieih\ of

U'\tin<i and

other relevani infornuition. 1 1 ama.viniu mdesig n ral e i s no i achieve d wiihi n ^ ) du\ s o t suin-up . ih e .\(.) D .Xdmniisiratu r

shal l requir e lestini ; h e don e a t th e ral e achieve dan d aizaiii whe n a maximu mrat e i s aehieved . ^.)^ller.^^pel^ato r shal l suhini i re[H>rt. s o f

an y require d [X-'rlormanc e slac k

lest s to r particulat e matter , wiihi n 6 0 eaienda r day s after

complelioi i otlh e fcsi . I

n addiliu[ i l o annua l stac k tests , owner/ot>eralo r

shal l Ili!]n'.!'irj^!'riity.!;Llc : emission s lo r

complianc e wil h (h e 13,\ RI " emissio n limil s i

n accortiaiic e wii h ih eapplicabl e (\>iiipliaiie e As-uiaiie e Moniiorin' j K\\.V1 1 pla n develo|X'tl am i .ipprose< I H

I iceofdanc e w iih 4 0 (T Rpar t 64 . A tes t

protoco l shal l b e submitte d fo r Divisio n approva l prio r t o testin g an dawritte n report o f th e tes t result s shal l b e submitte d t o th o Division . Testin g require db y th e WAQS RChapte r 6 , Secdo n 3 operatin g permi t ma y b e submitte d t o .satisf y th e testin g required . Delet e ih e prio r senieiicc . Thi s i s areteiene e l o al l ih e iper.iiiiiL ; ['">•"" " 'e::uiaiions . Thi s need s lc > h e replace dwil h aprovisio n ihai wil l b e m Ih e SIP . Th e Stat e of

Wyomin g i • i performanc e test s an dcomplianc e wit h th e BART limit s fo

r N0.< b e determine dfor

Unit s 3 an d4 usin g acontinuou s emission s monitorin g syste m (CEMS) . .iM.JLii

i A Ill i liii.

- pioviMtiii s ill ilii s •.Ci-iiiHi. certifie d in accordanc e wit h 4 0 CFR par t 6 0 an d dat afromth e CEM S ^h.tl l ijw . r tU v requiix ' , : 4 0 CFRpar t 75 . Th e State o f Wyomin g iniios^ ^ performanc e test s fo r complianc e wit

h Li e BART limit s io r

PM/PMi o conducte dannuall y followin g 4 0 CF R60.4 6 an d EPA Referenc e Tes t Method s 1-

4 an d 5 .

itii t W. .\i)iicndi\ .\ \les i '.hal l coiisi>i iifihre e runs , wiiheae h run .i t ieas i 12 0 miiiuie s ii

i ihu-ihi' • ,vi!,-,i,n^ . .,,,,,,1 , ,r/,n,i, v .i,,,,i,r, | nhi . ! ,• . TestiH g fcquifc d b y th e WAQS RChapte r 6 . Sectio n 3 operatin g permi t may b e submitte dt o satisf y th e testin g required . IVIci e ihe prio r sentence . I hi s i s alelereiic e l o al l th e opcralin g t)eriiti l iciiuiatioiis . I hi s need s t o h e replace dwil h aprovisio n lha t wil l h e in th e SI P II . SI P Element s tha tmus tb e added : • ^-ji-iL ^ •"

• • ' - j ^•

- " , .miiiii ; lim e lo t ih e variou s emissio n Jiiiiits . includin g

• SI P mus t

contai n monitorin g an d complianc e determinatio n specifics . {Se e Sectio n at

th e en do f

thi s analysis } • Th e SI P mu.s

t als o contai n th e specifi c recordkeepin g an d reportin g requirements . (Se e Footnot e 1 fo

r suggeste d language ) « Th e SI P mus t

explicitl y stat e thos e record s th e source s ar e require d t o kee p t o asses s complianc e fo

r th e tim e fram

e specifie din th e SIP . Record s mus t b e commensurat e wit h regulatory requirements . Record s mus t b e availabl e fo

r examinatio n upo n request . (Se e Footnot e 1 fo r suggeste d language ) • Th e SI P mus t

giv e reportin g .schedule s an dreportin g formats . • Recordkeepin g o Th e recordkeepin g mus t b e require d suc h tha t

failur e t o d o s o woul d b e a .separate violation . o Preferably , th e SI P shoul dspecif y tha t record s mus t

b e kep t for a t leas t five years ' Suggeste dlanguag e - Owner/operato

r shal l maincui n th e followin g records fo

r u t lea.s t liv e years , am

i the y mus t b e availahl e o n request : 1 . Al l CE.M S data, stac k tes t data , an ddat acollecte d pursuan t t o th e CA M plan , includin

g th e date , place , an dtim e o f sampling , measurement

, o r testing ; parameter

s sampled, measured

, o r teste d an d results ; ih e company , entity , o

r persti n tha t performe dth e testing , i f applicable ; an

d an y tield daiasheet

s fro m testing .Th e SI P shoul d require periodi c reporting.' Th e SI P shoul d require timel y deviatio n reporting.'^'* Includ e definition s for . (1 ) boile r operatin g day^ ; (2 ) CEMS^ ; and (3 ) substitute hourl y emissio n rates ^ Suggeste d languag e fo r monitorin g and complianc e determinations : 1 . Pound s Per Hou r An d Ton s Pe r Yea r Limit s Fo r any hou r i n whic h fiie i i s combuste d i n th e boiler , owner/operato r shal l calculat e hourl y S0 2 an d NO x emission s i n pound s a tth e CEM S i n accordanc e wit h th e monitorin g procedure s an d requirements o f 4 0 CF Rpar

t75 . I n calculatin g hourl y mas s emission s and emission s rate.s , owner/operato r shal l us e th e conversio n procedure s specifie d in 4 0 CFRpar t75 , Appendi x F . Fo r an y hou r tha tvalid , qualit

y assure d CEM S dat a ar e unavailable , emission s shal l b e calculate d i n accordanc e wit h th e mis.sin g dat

a substitutio n procedure s i n 4 0 CF Rpar

t75 . subpar

tD . Thes e hourl y value s shal l the n b e use d t o determin e complianc e i n accordanc e wit h th e particular limit' s averagin g period , a s follows : 3 . Recofd. s o f

qualit y cs.suranc e an dquality contro l activitie s fb r emission s measurin g system s including , but

nu t limite d to , an

y record s require d b y 4 0 CF RPa n 73 . i . Record s o f

al l major maintenanc e activitie s conducte do n emissio n units , ai r pollutio n contro l equipmen t

an dCEMS . 4 . An

y othe r record s require db

y 4 0 CH Rpart s 6 4 an d75 .

' Suggeste dlanguag e - Owner/operato r shal l als o submi t

quarterl y CEM S performanc e reports , t o include date s anddurado n o f

eac h perio d durin g whic h th e CEM S wa s inoperativ e (excep t fo r zer o an d spa

n adjustment s an d calibrado n checks) . rea.son(s ) wh y th e CEM S wa s inoperativ e an dstep s take n t o preven t recurrence , an y period s fo r whic h missin g dat asubstitutio n procedure s wer e used , any CEM S repair s or adjastmcnts . an dresult s o f any CEM S performanc e test s require d by 4 0 CF Rpa n 7 5 (Relativ e Accurac y Tes t Audits . Relativ e Accurac y Audits , an dCylinde r Ga s Audits) .

' Suggeste dlanguag e - Owner/operato r shal l submi t

quarterl y exces s emission s repun s n o later tha n the .10 ^ da y followin g th e en do f

eac h calenda

r quarter . Exces s emission s mean s emission s tha t excee dth e emis.sion s limit s specifie din above .

' Sugge.stedlanguag e - Owner/operato r shal l als o submi t

quarterl y report s o f

an y exceedance s o r

excursion s under the approve d CA

M plan , an dstep s take n t o correc t th e exceedance s o r

excursions , in accordanc e widi40CI-'R64.<i(a) . ' Define boile r

operatin g da

y a s "any 24-hou r

perio dbetwee n 12:U

0 midnigh t andth e followin g midnigh t durin g which any fue

l i s combuste da

t any tim e a

t th e stea mgeneratin g unit. " See . 4 0 CF Rpar t 51 , Appendi x Y . sectio n V .

" Suggeste dlanguag e - Continuou s emissio n monitorin g system " o r "CEMS " mean s th e equipment require db y Ithi s sectio n | t o sample . unalyTC , measure , an dprovide , b y mean s o f

reading s recordeda

t leas t onc e ever y 1 5 minute s (usin g a

n automate d dat aacquisitio n andhandlin g syste m(DAHS)) . apermanen t recordo f S0 2 o r NO x emissions , othe r

pollutant emissions , diluent , o r

stac k ga s volumetri c flow rate . Suggeste dlanguag e - "Substitut e hourl y emissio n rates " o r "substitut e hourly emissio n values " meaa s any hourly emissio n rate s o r value s calculate di

n accordaiKc wit

h th e missin g dat asubstitutio n procedure s o f 4 0 CH Rpar t 75 . subpar

t D , where valid , qualit

y a.ssure d CEM S dat afo

r tha t hour are unavailable .a . Pound

s Pe r Hou r LimiLs , I f th e limi t[i n Tabl e (cross-re f BAR T limi t talile)|i s expresse da s aIb/h r limit , owner/operato r

shal l calculate averag e Ib/h r emission s ove r th e appropriate averagin g period , a s follows : i . Limit s wit

h a30-da y averagin g period : Emission s shal l b e calculate d on a 30-da y rollin g averag e basis . A

t th e en d o f

eac h boiler

operatin g day , owner/operato r shal l calculate ane

w 30-da y rolling averag e emissio n rate i n Ib/h r fro mth e arithmeti c averag e o f al l vali d and substitute hourly emissio n value s fro mth e CEM S fo

r th e mos t recen t 3 0 boiler operatin g day s ii . LimiL

s wit h a12-mont

h averagin g period : emission s shal l b e calculate d on a12-mont

h rollin g averag e basis . A

t th e en d of

eac h month , owner/operato r shal l calculate ane

w 12-mont

h rolling averag e emissio n rate i n Ib/h r fro mth e arithmeti c averag e o f all vali d and substitute hourly emissio n value s fro mth e CEM S fo

r th e mos t recen t 1 2 months , b . Ton s Pe

r Yea r Limits , I f th e limi t [i n Tabl e (cross-re f

BAR T limi t

table)]i s expresse da s aton.s/y

r limit , rolling 12-mont

h total , tota

l emission s i

n tons/y r shal l b e calculate do n ai 2-mont

h rolling basis . A

t th e en d o f eac h month , owner/operato r shal l calculate ane

w 12-mont

h emission s total , in tons/yr , usin g all vali d and substitute hourly emissio n value s fro

mth e CEM S fo

r th e mos t recen t 1 2 months . 2 . Pound s Pe

r Millio n Bt

u Limit s Fo r an y hou r i n whic h fue

l i s combuste d i

n th e boiler , owner/operato r shal l calculate hourly averag e S0 2 and NOx concentration s i n pound s pe

r millio n Bt

u a t the CEM S i n accordanc e wit

h the requirement s o f

4 0 CF Rpar t 75 . Fo r an y hour tha t valid , qualit y assure dCEM S dataar

e unavailable , emission s shal l b e calculate d i n accordanc e wit h th e mis.sin

g datasubstitutio n procedure s i n 4 0 CF Rpar t 7 5 subpar

t D . Thes e houriy average s shal l then b e used t o determin e complianc e i

n accordanc e wit

h th e particula

r limit' s averagin g period , a s follows : a . Limit s wit

h a3-hou r averagin g period : emission s shal l b e calculate d on a3-hou r rolling averag e basis . A

t the en d of eac h hour , owner/operato r shal l calculate ane

w 3

- hou r averag e emissio n rate i

n Ib/MMBt

u fro mthe arithmeti c averag e o f th e vali d an

d substitute hourly emissio n rates fro mth e CEM S fo

r th e mos t recent thre e hours . b . Limit s wit

h a30-da y averagin g period : emis.sion s shal l b e calculate d o n a30-da y rolling averag e basis . A

t the en d o f eac h boile r

operatin g day , owner/operato r shal l calculate ane

w 30-da y rolling averag e emissio n rate i n Ib/MMBt

u fro mth e arithmeti c averag e o f all vali dandsubstitute houri y emissio n rates fro mth e CEM S fo

r th e mos t recent 3 0 boile r operatin g days . c . Limil s wit

h a90-da y averagin g period : emission s shal l b e calculate d o n a90-da y rollin g averag e basis . A

t th e en d of

eac h boile r

operatin g day . owner/operato r shal lcalculat e a ne w 90-da y rolling averag e emissio n rat e in Ib/MMBt

u fro m th e arithmeti c averag e o f

al l vali d and substitute hourl y emissio n rate s from th e CEM S fo r th e mos t recent9 0 boile r operatin g days . d . Limit s wit h a 12-mont h averagin g period : emission s shal l b e calculate d o n a 12 - mont h rolling averag e basis . A tth e en d o f eac h month , owner/operato r shal l calculat e a ne w 12-mont

h rolling averag e emissio n rate i n Ib/MMBt u from th e arithmeti c averag e o f al l vali d and substitut e hourl y emissio n rates from th e CEM S fo r th e mos trecen t1 2 months . e . Limit s with a

n annua l calenda r averagin g period : emission s shal l b e calculate d o n a calenda r yea r ba.sis . A tth e en d o f eac h calenda r year , owner/operato r shal l calculat e a ne w emissio n rate i n Ib/MMBt u from th e arithmeti c averag e o f al l vali d and substitut e hourl y emissio n rates from th e CEM S fo r th e precedin g year .

### ENCLOSUR E 3

DRAF T COMPLIANC E DETERMINATIO N LANGUAG E FO

R COLORAD O BART LIMIT S 2/11/1 0 I . Monitoring , Recordkeeping , an d Reportin g A , Definition s "BART unit " mean s an y uni t subjec t t o aBAR T emissio n limi t

in Tabl e "Boiler operatin g day " mean s any twenty-four-hour perio d betwee n midnight

and th e followin g midnight

durin g whic h any ilie l i s combuste d a t any tim e in aBAR

T unit . "Continuou s emissio n monitorin g system " o r "CEMS " mean s th e equipment require db y [thi s section ] t o sample , analyze , measure , an d provide , b y mean s o f reading s recorde da

t leas t onc e ever y 1 5 minute s (usin g a

n automate d dat aacquisitio n an dhandlin g system(DAHS)) , apermanent record o f S0 2 o r NO x emissions , other pollutant emissions , diluent , o r

stac k ga s volumetri c flo w rate . "Substitut e hourl y emissio n rates " o r "substitut e hourl y emissio n values " mean s an y hourl y emissio n rate s o r

value s calculate d in accordanc e wit h th e missin g dat a substitutio n procedure s o f

4 0 CF Rpar t 75 , subpar

t D , where valid , qualit

y assure d CEM S dat afo r tha t hour ar e unavailable . B , Monitoring/Complianc e Determination : S0 2 an d NO x BAR T Limit s A t al l time s afte

r th e complianc e deadlin e specifie d i n [[specif y sectionll . th e owner/operato r

o f eac h BAR

T imi t shal l maintain , calibrate , an d operat e aCEMS , i n fiil l complianc e wit

h th e requirement s found a t 4 0 CF Rpar t 75 , t o accuratel y measur

e S02 , NOx , diluent , an dstac k

ga s volumetri c flow rate fro meac h BAR

T unit . Th e CEM S shal l b e use dto determin e complianc e wit h th e S0 2 an d NO x BAR

T emissio n limit s fo

r eac h BAR T unit . I n determinin g complianc e wit h th e S0 2 an d NO x BAR

T limits , al l period s o f emission s shal l b e included , includin g startups , shutdovms , emergencies , an d malfimctions . NOTE : Per sectio n 302(k ) o f th e CAA , BART limits mus tb e metcontinuously . Th e BAR T limits sectio n o f

th e SI P an d Reg . 3 need to state tha tth e BAR T limits appl y a tal l times , includin g period s o f SSM . 1 . Pound s Pe

r Hour AndTon s Pe

r Yea r Limit s For any hour i n whic h fiiel i s combuste d in th e boiler , owner/operato r shal l calculat e hourl y S0 2 an dNO x emission s in pound s a t th e CEM S i n accordanc e wit h th e monitorin g procedure s an drequirement s o f 4 0 CFRpar

t 75 . I n calculatin g hourly mas semission s an demission s rates , owner/operato r shal l us e th e conversio n procedure s specifie di n 4 0 CF

Rpar t 75 , Appendi x F . For

any hou r tha t valid , qualit

y assure d CEM S dat aare unavailable , emission s shal l b e calculate d in accordanc e vn\ h th e missin g dat a substitutio n procedure s i n 4 0 CFRpar t 75 , subpar

t D . Thes e hourl y value s shal l the n b e use dt o determin e complianc e i n accordanc e wit h the particuleu : limit' s avereiging period , a s follows : a . Pound

s Pe r Hou r Limits . I

f th e limit[in Tabl e ^(cross-re f BART limi t table)]i s expresse da s aIb/h r limit , owner/operato r

shal l calculat e averag e Ib/h r emission s over th e appropriate averagin g period , a s follows : i . Limit s wit

h a30-da y averagin g period : Emission s shal l b e calculate d on a 30-da y rollin g averag e basis . A t th e en d o f

eac h boiler

operatin g day , owner/operato r shal l calculate ane w 30-da y rollin g averag e emissio n rate i n Ib/h r fh> mth e arithmeti c averag e o f al l vali dan dsubstitute hourl y emissio n value s fi'omth e CEM S fo r th e mos t recent 3 0 boiler operatin g day s ii . Limit s wit

h a12-mont

h averagin g p)eriod : emission s shal l b e calculate d o n a12-mont

h rollin g averag e basis . A t th e end o f

eac h month , owner/operato r shal l calculate ane w 12-mont

h rollin g averag e emissio n rate in Ib/h r fromth e arithmeti c averag e o f al l vali dandsubstitut e hourl y emissio n value s fromth e CEM S fo r th e mos t recent 1 2 months . b . Ton s Pe

r Yea r Limits . I f th e limi t (i n Tabl e (cross-re f

BAR T limi t

table ) ji s expresse da s atons/y r

limit , rollin g 12-mont

h total , tota

l emission s i n tons/y r

shal l b e calculate do n a12-mont

h rollin g basis . A

t th e en d o f

eac h month , owner/operato r shal l calculate anew 12-mont

h emission s total , in tons/yr , usin g al l vali d an d substitute hourly emissio n value s fromth e CEM S fo r th e mos t recent 1 2 months . 2 . Pound s Pe

r Millio n Bt

u Limit s For any hour i n whic h fiiel i s combuste d i n th e boiler , owner/operato r shal l calculate hourl y averag e S0 2 andNO x concentration s i n poimd s pe r

millio n Bt

u a t th e CEM S i n accordanc e wit

h th e requirement s o f

4 0 CF Rpar t 75 . Fo r any hour tha t valid , qualit y asstire dCEM S dat aare unavailable , emission s shal l b e calculate d in accordanc e wit h th e missin g dat asubstitutio n procedure s i n 4 0 CF Rpar t 75 , subpar

t D . Thes e hourl y average s shal l the n b e use dt o detennin e complianc e in accordanc e wit h th e particula

r limit' s averagin g period , a s follows : a . Limit s wit

h a3-hour averagin g period : emission s shal l b e calculate d o n a3-hou r rollin g averag e basis . A

t th e en do f

eac h hour , owner/operato r shal l calculat e ane w 3

- hour averag e emissio n rate in Ib/MMBt u fromth e arithmeti c averag e o f th e vali d and substitute hourl y emissio n rate s fromth e CEM S fo r th e mos t recen t thre e hoiu^ . b . Limit s wit

h a30-da y averagin g period : emission s shal l b e calculate d o n a30-da y rollin g averag e basis . A

t th e endo f

eac h boiler

operatin g day , owner/operato r shal lcalculate ane w 30-da y rollin g averag e emissio n rat e i n Ib/MMBt u fix)mth e arithmeti c averag e o f al l vali dan

dsubstitut e hourl y emissio n rate s fromth e CEM S fo r th e mos t recent 3 0 boile r operatin g days . c . Limit s wit

h a90-da y averagin g period : emission s shal l b e calculate d o n a90-da y rollin g averag e basis . A

t th e en do f

eac h boile r

operatin g day , owner/operato r shal l calculat e ane w 90-da

y rollin g averag e emissio n rat e i n Ib/MMBt

u fix)mth e arithmeti c averag e o f al l vali dan dsubstitut e hourl y emissio n rate s fromth e CEM S fo r th e mos t recent 9 0 boile r operatin g days . d . Limit s wit

h a12-mont

h averagin g period : emission s shal l b e calculate d o n a12

- mont h rollin g averag e basis . At th e en d o f

eac h month , owner/operato r shal l calculate a ne w 12-mont

h rollin g averag e emissio n rate in Ib/MMBt u firomth e arithmeti c averag e o f all vali dan dsubstitute hourly emissio n rate s fromth e CEM S fo r th e mos t recent 1 2 months . e . Limit

s wit h a n aimua l calenda r averagin g period : emission s shal

l b e calculate

d o n a calenda r yea r basis . A tth e en d o f eac h calenda r year , owner/operato

r shal l calculat e a ne w emissio n rat

e in Ib/MMBt

u fro m th e arithmeti

c averag e o f ai l vali d an d substitut e hourl y emissio n rate

s from th e CEM S fo r th e precedin g year . {[Nee d to addres s bubble d units.} } C . Monitoring/Complianc e Determination : Particulate BAR T Limit s 1 . EG U Particulate BAR

T Limits . Complianc e wit

h th e particulat e BAR

T emissio n limit s fo

r eac h EG U BAR T unit shal l b e determine dfro

marmua l performanc e stac k

tests . Withi n 6 0 day s o f

th e complianc e deadlin e specifie din , an d o n a t leas t a n annual basi s thereafter , th e owner/operato r

o f eac h EG U BAR T uni t shal l conduc t

astac k tes t o n eac h uni t

t o measure particulate emission s usin g EP A Metho d 5 , 5B , 5D , o r

17 , a s appropriate , in 4 0 CF Rpar t 60 , Appendi x A . A tes t

shal l consis t

o f thre e runs , wit

h eac h run a

t leas t 12 0 minute s i n duratio n andeac h run collectin g aminimu msampl e o f 6 0 dr y standard cubi c feet . I n additio n to annua

l stac k tests , owner/operato r

shal l monito r

particulate emission s fo

r complianc e wit

h th e BAR

T emissio n limit s i

n accordanc e wit

h th e applicabl e Complianc e Assuranc e Monitorin g (CAM ) pla n develope d and approve d in accordanc e wit

h 4 0 CF Rpar t 64 . 2 . CEME

X Particulat

e BAR T Limits . [[Need t

o addres s CEMEX particulate limits - 20 % opacit

y and lb/to n o f

dr y feed.} } D . Recordkeepin g Owner/operato r

shal l maintai n th e followin g record s fo r a t leas t five years :1 . All CEM S data , stac k tes t data , an d dat acollecte d pursuant t o th e CA M plan , includin g th e date , place , andtime o f sampling , measurement , o r testing ; parameter s sampled , measured , o r

teste dandresults ; th e company , entity , o r perso n that

performe d th e testily , if

applicable ; an dany field dat asheet s fromtesting . 2 . Record s o f

qualit y assuranc e an d qualit

y contro l activitie s fo

r emission s measurin g system s including , but no t limite d to , an

y record s require d b y 4 0 CF RPar t 75 . 3 . Record s o f

al l major maintenanc e activitie s conducte d o n emissio n imits , ai r pollutio n contro l equipment , an dCEMS . 4 . An

y othe r record s require d b

y 4 0 CF Rpart s 64 and 75 . E . Reportin g requirement s Owner/operato r

shal l submi t

quarterl y exces s emission s repKJrt s n o later tha n th e 30" ' da y followin g th e en do f

eac h calenda

r quarter . Exces s emission s mean s emission s tha t excee dth e emission s limit s specifie d i n above . Owner/operato r shal l submi t report s o f any require dperformanc e stac k test s fo r particulate matter , withi n 6 0 calenda r day s afte r completio n o f

th e test . Owner/operato r

shal l als o submi t

quarterl y report s o f an y exceedance s o r

excursion s under

th e approve d CA

M plan , and step s take n t o correc t th e exceedance s o r

excursions , i

n accordanc e wit

h 4 0 CF R64.9(a) . Owner/operato r

shal l als o submi t

quarterl y CEM S performanc e reports , t o includ e date s an dduratio n o f

eac h perio ddurin g whic h th e CEM S wa s inoperativ e (excep t fo r zero andspa

n adjustment s an

dcalibratio n checks) , reason(s ) wh y th e CEM S wa s inoperativ e an dstep s take n t o prevent recurrence , an

y period s fo

r whic h missin g dat a substitutio n procedure s were used , an y CEM S repair s o r

adjustments , an d result s o f any CEM S performanc e test s require d b y 4 0 CF Rpar t 7 5 (Relativ e Accurac y Tes t Audits , Relativ e Accurac y Audits , an dCylinder Ga s Audits) ,