March 13, 2009

BILLINGS (iENERATlON, INC.

Suile 200

lOS7 West Riycr Street

Boise, Idaho S3702

Telcphonc (208) 344-31570

Tclccopicr (20S) 344-:39S4

Ms. Laurel Dygowski

U.S. Environmental Protection Agency

Region 8

1595 Wynkoop Street

Denver, CO 80202-1129

Dear Ms. Dygowski:

I am in receipt of your letter requesting stack and emission information about the

Yellowstone Energy Limited Partnership (YELP) facility located in Billings, Montana. I

have gathered the data to answer your request. The data is contained in a spreadsheet

attached to this letter.

Please note that in some cases where there was no data available, we have estimated

data, and have noted such estimates.

Inc. (208-344-

STATEMENT OF CERTIFICATION

I certify under penalty of law that I have personally examined and am familiar with the

information submitted in this dool:t ent and all attachments and that, based on my

inquiry of th~_i~ediatelt:esponsi e for~ining this information, I believe that the

informatiovr'is tru , accur te 2lnd co pie. am aware that there are significant

pen~ltie I for sub itting a . for a~on, includin je possibility of fine or

Imprison e " I f

Title: President Billin s Generation Inc

general partner of Yellowstone Energy Limited Partnership

Date: -----'----"'--+--------------

Requested Information

Part I: General Facility Data

Response Source Notes

11. Name of Facility IYello,"slon. Limited Partnership I I

I

2·.~oll1Jllete stree~addressoffacilily: - --- _-= 2215 N Frc)nlage Rd ------ n__ n._n____ --. --II ~eetAddres'" Bill,"~ ---- 1 b.....QlL_ --- ".-- Montana __

~Stat~_________ --- 59101 - _ __._

-d~ Zi~___ -_._- ---- Yellowstone Count e, Coun

1-. Facili.!Y_9..oJ)~cL _

a. Name: (First. Last)

b. Title: ----c:T8I8PhOnenumber:- d. Fax number: -- 8. E-mail' - .-

--==~~~~c---- -------- -------j-------- -------I

'208) 344-3570 .__...--_.--. ----1---- ------ ---- ._,(208) 344-3.9~'!.... _

scott.siddow8v@rosj·boiss.com

Requested Information Response Source Notes

Part II: Boiler Emission Unit Data

--

-------'--

----+----

L El'1~slon Unit name: EU1lCircuialirlg Fluidize~~(L13oilE!rL _

a T~f Boi!er__ __ __ _ Circulating Fluidiz~d bed Combustion

__ b Make __ - - - ---- =I~~ii;;:F'~w"r _ c. Model: HCFS -C:CModeIYear - ----.-- 1994 -----

-e:YearTflStalJed ------------- 1995--

~[~~!e.9_~9!:!jp01-~~nJj~~~_~ ----_-=== ~~~!~9_!T1 instaiJ§~n~~_~-

_[ Unit is cu~_q~~_C!t~f!~I .. (y_~s/noL ~__ y~ . . _

Jf.~858te OtfrnaioQer8tjon_---~______ -------1-------------------I

i(Will unit be ogerated in future:

h. Ma;jmum"Unit Caoacitv (MMBtufhi\ ---------------r455~5-·per boiler

Due to a shared staCk. the unccntrolled emissions are estimated from a pre

rating of the totals based on individual boiler heat inputs. IndiVidual unit tesl

data is not available for these units

2. Boiler Ouliellnformation

_§,_Q_9~~ unrt share eXh~iL;stsla-Ck?-~---- ~~___ _ _ Which unlls is it shared with? EU2

-~~haustVOlumetriCFJOivR.a!~t(a" cfm): -=-_=- BOiler" ~22_2.3?_7.e-,timaled. Combined St-a.£k_;_ 444,71,f~' act" stac-"_te~ta-v~- I Due to a shared stack, the volumetric flow rate is estimated from a pro-ratln

_~ Boiler ~b~l;Jst outlet Temperature (flu 34q~"~ 2005 stack test averag~ of the totals based on mdividual boiler heat inputs. )ndlvldual unit test data [

. d. Bailer Exhaust Molst~.r~ (%} ~________ _ 7.24% _ _ _ 2005 ~~~*_~~_.~y_~r_age not available for these units

e Stack Height (ft) 199' 2006 Title V application

DiameteCift) - --- . -- --- a:- -.- --- ------- 2006 Title V application

l~_g:M"xirnlJl1l HourlyGr9"_J:leatlnJiu.ili0.M~tu/iirj- m Sailer L; 45.5_S:- eS~rflaied.~Cornbined Stack - 91-1 -.accllJill . QdglDalaii Quailly'p~rrnjt

t-- -~. Hours of OQ"r"tjo_n. 8,300 ----------- -------.-.--

J~~i:~;~~~~~,~:~~(;J::~~i,O~jt~2~r)~,.: --~__ ~~iftl;,.@,-es!jmated,~~~[I}5!_d_$.~~Ck,~132(fib-SIh~~_~~ma,t.e 2005 stack iest:~Clr1Irol_eti;CfencLI _k. avera~~I').fQlJtcoll~dNOx emiSSIOns (lblhrL_ _ __ B01!er__!....=_?_SQ. estimated, Combined Stack;; 500 Ibslhr - estlma!~c 200§. stack test, conlroL~!ficie~1'.- _

I. average uncontrolled S02 emissions (Iblhr). Boiler 1 =2781 estimated, Combined Stack - 5562.51bslhr estir 2005 stack test. control efficiency

The CFB boiler IS a relatively low emitter of NOx due to a lower firing

________. . .. j temperature compared to standard pulverized coal boilers The unit does n

however, contain any post-combustion control technologies.

---~---'

Due to a shared stack. the controlled emissions are estimated from a prorating of the tctals based on individual boiler heat inputs Individual unit te

data is not available for these units.

3, EXlstln.g-,,~uli9Jl<::-"Illr"'--E..qtJijlment_

a. PM Control Technology Information

}~:e1~~eT~n~~~~fi6~~~~ii~-=--=~_~ __n ~ __:-J'~~~~=~~n_-_- ~~~___=~--:. n __ ~- =~I%~@ ~~::_~ :~~:~~~ -=---= _ _ iii. Ye§!:l~st_alJ~~. . ~______ _ ~~5 ._.. _ _

~~~~~~_~t ()f qQntrol DeviceJ~L " Iunknown_: was~faled into piant0~~.9.Sl...___ _ _

v.. Annual Operatin9.<::ost of Control-Device (~yrL __ . Boiler 1 ; S100,.o00, Main StaCk; S200,OOO

v! _Exp~E.~~~pme~_~· 30 years frcm ~nstaIL~~~ _ . ~___ _ _

__ ,,-,,- Relevanl sizinginrormation . ~0<l,1,o,o_acfm p-",-t)o~r:."Jlpro~lm~e_______ 2006 Title V apjllic.'l~on _

_~~~i_g[l ~ntfl?~_efficleQ0J~L_______ _ 9~:r? __ _ _ _ __ ._________ _ 2006 Title V application

IX ~ver~.!' ContrOlled PM ~I1lJssic>llsjlb~L Boiler 1_;6 6 esti'llated. Combined StaCk; .13_2ibslhr - .~~al 21612007. stack ~esL__

=--b.NO~f.()~~~~TechnofQgyInform~i~---'---===~~__ _ ,._.,_,._______ _ "

_-,-lYe~_of NOx Control Technology_ _ CFEl.boil,,:,:

1

_ 1/ Make/Model."f NOx Control T~"-nology --- --- ~la_ HI Year Installed n/a

___-'v Installed Cost of coiltr.onfiViCe-(~L==--- -- nhi- __ _

_~ Annualgp-"'-alIn~~r1trol DevlC~~...':L n./9.. " ""-~cted-"~eofe.'Jll'f'ment _ __ _ _ nla _

VII Relevant S!Zlng rnformatlon n/a

- VIII DeSign controlefflcler1c?Y {~o) ------ --80%-- -- .., _u_____ 1~.Q6 Title V afJplication I --=-ix. Avera~e~C_o_ntrolled NOx Emissio~_S(ib7hr) =-==- Boiler 1~50 este-~aK~,- ~O~bined Stack - 100 Ibs/hr- ac~.':§L_~cal C~E.r,.il-Q~ _

- b' -S.2-2 Control TechnologYlllformalcon______ _ __ _ _ _ _ __ _ _ _

_~pe 01502 COntr()ITechn<Ol".g!' _ _ LI'IlestoneIIlJecllolllcJ.f"S S.a"er _ j_ _ _ II Make/Model of 502 Control Technolog~ n/a . _ _ The limesto;le injection control technology IS a part in the operating proces

---~Year Installed - ------ -- - 1995 -------- -- - --------,-,-----~_- of the CFB bOiler It IS not a separate "add-on" device. but it does succeed i

__ IV Installed Costaf.f~.!rol p~vice-{S) ~~-_--- - nia -=-feature-Of C.f!3 b~~ -_----=-=-- _~ - -- ~_~~ -_.--=------::-:_~ controlling S02 emisSlcns at the pefmilled conlrol effiCiency.

....Y.- Annual 0p~aling Cost of C0.l1trol ~Ice (Sl~_ _ _ S2 280,000 per year total- S1_.140 000 per bOiler _ _ _

_ vi. ~~£ected life of eq~!!!ent: _.________ 30 years Jco_r::'_ present . _

_=VII. Rel~y~Qt_~formati~__ . _ 39,100Ibs/h.!..tctal, 19,550E~~rboiler ~------_-_------~--------

viii. ~n control efficienc~ 92% _ _ _.. 2006 Title V application

,X: Average Controlled 502 Emissions(j5/hr)-------- Soiler 1-= 222.5 estimated. Combined Stack - 445 Ibslhr - actua Tvpical CEM Data --

___~rT!~.IdD!..Qfl~HLs~j_ftcn_~)

Sulfl,l!._(:onte:Jl_of Fuel (?~_~~·L.

_~_?~Lrn!:JiD..£!!.el.Eld.og .R2_te {ts>[lIhr;

_ _Heating Valee olEuel (Slu~.b),_.

__.Yi!.§c_of Da!~Jf Not_~QQ?--,!~il_§on for _QQ.L.!:J~Lr:!g_~_Q~ __

4. Fuellnforrnation _ . 1_ _ _

~i,L~a.c-h.IYl'e ofFuel Us~d__ __ .____ «Oke l Coker ~s .. _L _

- -------- 124,350 tons l252.310 tons-per~---- ----·---f200Tj;,;el ese·· \_ , ' . -------.-.--- ---------,------------- r---------------- ------- ,uel use was even,y Spilt oewee·" the two bOilers

14506130o ~----- ----~Iypic"Jfueianiil~is.------

__ 1~7~TOdh~-I~To~~~0~r- __~_:._=~ __ =_-~---_--I- .,. _~~~_~-= __ - ~~~°t~~~yei~_~~~~;a~~"_~~~p~~Ii~;o~coker gas__ I~tP~-a~ue!fln~ySl~ _

Requested Information

Part II: Boiler Emission Unit Data

Response Source Notes

1. Emission Unit name:

a~l'P_e of.!l.~r~- -- -

_ Jl..~-"k~_

c Model

C1Modal Year

"-Year Installed

T~eCtedE_~ui!l'11irill;fe

___9_" U--.O.illi curreD1!Y__QP_~r§!ion~LJY§.§LC~)

~---

~~l.Q~e Qffina!~p~~_~

____ Ii VViIl_~_nit be operated in futlJrEL

h Maximum Unit Capacity (MMBtu!h(

IClrcuJat!ng}luidlze~ -bed Corribu~t1on

- -- ~~~1ella P~\'I~r-_=-~____~~=_

199~ _

ya.'-

455 5 per bOlier

,--

----1----- ----

oriainal air Quahty permit

----- I

I 2. Boiler Outlet Information

=~a-·-DQisu0itshare ex~cic_ _ __.. __ ---._-- y~--

\I\lhich units is it shared with? EU1

___.!i.__Boiler ~xhgust Volurn.el'l~I'I~_~'!t8~laciii1i--~er2_=~i22357 estimaled_~,,-mb;;,eifStack;444,714 '-"CtlJ -005 sfack tisTav~~g~

c. Boi~""h?lJ.st outlet Temperature(FL 340"F ;1005 stack test aver~g,,-_

__ cJ B_oi~Exhaus( M()i~tur,,-{~_ _ L2.i"'_ _ 200.5._S!a.ck lestaver"Jl.e

t

-"- Stack H_~igQ1ifl)_____ ----- ]~' --- ------- - ~006 TItle V-"PPlicatio"--l

~:~~~~~~~'"ii~~r~tr()ssHiajJnI'LJ(lMMBtulhrL__ - ..--- ~0ILerE_4555eStimateci-Combina.c[§t8~~1~,~:cL~C:=~fu;I~~~~21~ic;~:1l h Hours of OP§'f.aJrQr1... _ 13,300 _

i~:~~::~~..~~:r~~~~~C~~~:~.Ys.~~hrj _ ----~__ I~.~:r20 660..esiimaled._9~~~nedStack 1_~20..lb_.S!h~~~!i."1l~.rn2005 sta~k~~st, oii~!r.~1 effl.c[.e.-..ngy~ __!~A~C§9~l!OCO_f1tr9l@Q.J"JOx e!TJs?~qE!~Jl.QtbO ~~er 2 = 25q~~timated. _g_!.?mp-'i.0ed Stack::: 5DO_I.bs/hr eslh~~~~ 2005 stack test contr-.9!~ff~ency

l. averaqe uncontrolled 502 emissions (lblhr) BOller 2::: 2781 estimated, Combined Stack = 5562.51bsihr - est! 2005 stack test control efficiency

Due to a shared stack the vo!umetnc flow rate IS estimated from a pro-ratln

of the totals based on individual bOIler heat Inputs Inc/vidual unities! data i

no! available for these units

Due to a shared stack. the uncontrolled emisSions are estrmated fram a pn

raung of the totals based on indivldu8i bOIler heat Inputs Ind[Vldual unit tas

data IS not avaIlable for these units

I

Due to a shared stack, tne controlled emISSions are estimated from a prorating of the totals based on indIvidual bOiler heal Inputs Individual unit t8S

data IS not aval!able for tnese units

The Wl~eS[One injection controllechnology [s a part If: !i;e operating proces

of me CFB bOlier It IS not a separate "add-on" device. !JUt It does succeed i

controilmg 802 emissions at me permitted control effiCiency

The CFB bOIler IS a relattvely low emllter of NOx due to a lower firing

temperature compared 10 standard pulvenzed coal bOIlers The unit does n

however. contain any post-combustIon contrel technologIes

_120(JEj Title V appl'callon

12006 Title V ap~ation

-~=-.:: -- -

-- Ltmestone f~ction tDCFB Bo~-- --- n/-a--- -------.--

=~~~1~~~i~~~f~;:,::~~~'~·!~-~_~=_~-_~~~- ·I~~;~r 2 = 2225-estimated-;Gomblnect-Slack = 445lbslhr:acj~~~~~~;~atiC"_un

":=]~~g;~~se= 1~

Unknown

Boiler 2 = S100,000, Combined Stack = S200-:-aclO-----_·

____ ~9_Y_earsfrom-rnstal1atJ9~__=== ,~·· ~==- .______ . _ _.__.1 204, 199 a~f!1_~ boileL-_~EProxim~§_______ . 2006 I.!!~_Y_~p.2ll£ation_ 99% __ __. 2006 Title!\japR"~ti"-rl _

_B_oiIer_2--=.s._6es"rn-"ted,(~oi11blned_.§tack =.J~2Ibs/hr - actual 2/1".'2005 _stack tesl

=11~Bb~er ~- _~~~-~~~-~~---- --------

n/a

-~;: ---=- ---- -~-- ~f~;: --= ---=---=-- -- - --- -=- ---.:: --- - - 80% - - - -- - - - -- - 2006 Tllie V i3flpllc8tion

-_1B~~ec~~st~_Comb:~ Stack~iOO~SI~:ua~~ I~CEMDala --

bS02 Control_Technolcg)~-informaliOn

--'.Type OiSOiCOntroiTechnOlo9Y

--Ii-Make/Model of S02 Conlrol Technology -iii Year inst8Iled-- -----..---

IV Installed C-c-st of (onirol DeVice (5)--

___-~;~Annuaj6peratj~,Cost- offontroL[5"ev~~_(s1Yr} _

___ VI Expected life of equiflrn~r1t......_ . _

~_ji, Relevant sizing information

=-viii _ Deslgn contrci effici~~~'yj~L_ _ _ _

IX Averaoe Controlled 502 EmISSions (Iblhr)

_~ti9~_go~!~l~chnology!_~(~rmali~n..

__i.llP!,~O:<C;ontrolTechrlOl£.9.L _

Ii Make/Model of NOx Control Technology

{it Yearlnstalled-- ------ -

-,"lnstaTIed Cost of Conlrol DeVice (sj-

--- v_Annual O-~r.§!!Ln..9~ost of Con.~Q~~~e (~a~=-. __.__ __~~ ~~[?ected life ,!~guipmen~ _

_~B~l~vai't sizing j~oI!:Datjo,!-. _

viii Design control efficiency (O/eL

IX- ~~g-et...Sl_I1~rpjl~~~Ox _~mis~!ons llb/hO

~, ExistiJ'R"-~lIution Control~llipment_

a PM COf1trol TechnOlo~y Information __

i,Type of PM Cor1tr.~1 T_echnoio~L

il Make/Model 01 PM Control Technology -m-Yearfnstal-led----- --------

TvTnS-talledCoslo]ConlrOlD!'vlcim _

v Annual Operati~g Cost of Control D~vice (S/yr)

,_=-=-~_ E~ected life of eq~Jp!!l~nt -_ - ---

vii _Rel~vanl sizing inforrl}8tlon·

-~- YJll~-]§~rgn cg!!!~J efficiencil~f· _

[X_!'-_':~~.9~f9i1lrElle~_~__~rnisslons_ {~!!:n_

4. Fuel Information

his!-E""h TYP"-2I£;iijJseci--

Amount Of f.1.:l_?1 U~~t!Q!1_s)

fi§.a~n9..'Ialue~F_LJe.L@UIlb)

._==\I:OI<e !~o..k.er G.as .-~-----~-- --- li--------- __ .J24}.5.o.lCnS/.2.-"~10to.n.S.p"-,--bcJiler _. __.--- 2.QQ7iuei use

-:-_]145001306 ===-=-=--=-=-= ---- -=----=-__=_ ttlJiC8Duelan"Jysis.

-·-.. --------1 rue' use was evenly split behNeen the h.·/e bOIlers

_Maxim~Olf.uel F!_~ Rat~ (ton!t1~L.

_fu!Ifui_.Q.ontent oLf~~ i!~) v.yt.)

.-J. ------ ----- --------~

_._~_ ~.?_L~ T.9Q.~r 130 To~lhfj~er boiler __

6%/O.€3% _,Iyl'ic~uel a~Xsis

~---.r~_a.r of Oal~_!L~Q!.._~Q02. reas_~!lJor o_ot u§J09_ 2002_

--.---.-- -- ------------ --I ---~---

~007 _!xpical"'y~ar ?Q~~:_~.E~g~~ lxpicaIJ~_~~c_~<?r cOke~g~ _