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# OAR Box 1781 Prepped by Ollie Stewart



### Document

Number: 

# 32 ) 11-1-2 4 Docket Number: 

# A-90-3 7

Printed 10/29/200810:46:19 AM Sheet 32 of 142P. 2

NewYor k Stat e Departmen to

fEnvironmenta l Conservatio n 5 0 Wol fRoad , Albany , Ne wYor k 1223 3

Apri l 1 , 1991

MEMORANDU M TO : Thomas C Jorlln g Commissione r 

## bi- ;
Regiona l Ai r Pollutio n Contro l _Engirie^erjr/\/;,,
. MOJ^ : Burea u Director s Sectio n Chief s FROM : Mr . Alle n (Originator : R . Parker ) SUBJECT : Ga s Turbin e NO xPolicy
. 91-AIR-3 9
Polic y NYSDE C polic yregardin g NO xcontro l fo r ga s turbine s i s a s follows
. A s ; always , th e Bes t Availabl e Contro l Technology(BACT ) fo r project s subjec t t o revie wunde r th e Preventio n o f Significan t Deterioratio n (PSD ) regulation , i s determine d case-by-case
. However , a s o f thi s date , BAC T leve l o f contro l fo r NO xemission s fromga s turbine s i s generall yregarde d a s 9 ppm v(dry , correcte d t o 15 % 0 2 ) whe n firing natura l ga s an d 1 8 ppm

v(dry , correcte d t o 15 % 0 2 ) whe n firing distillat e oil
. . I f oi l i s use d solel ya s a backup fue l i n a ga s turbin e projec t usin g Selectiv e Catalyti c Reductio n (SCR ) th e following als o applies
. I n recognitio n o f th e potentia l problem s o f increase d particulat e an

d ammoniu

mbisulfat e formatio n durin g oi l firing , NO x emissio n level s up t o 3 0 ppm ca n b e considere d BAC T i f ther e i s a correspondin g decreas e i n th e ammoni a sli p limit
. Fo r a 3 0 ppmNO x limi t durin g oi l firing , ammoni a sli p shoul d b e limite d t o 3 ppm v (dry , correcte d t o 15 % 0 2 )
. Th e abov e BAC T guidelin e limit s assum e tha t NO xemission s ar e bein g controlle d from2 5 ppmo n ga s an d 4 2 ppmo n oi l (vi a combustio n modifications ) down t o 9 ppm/1 8 ppm , whic hi s currentl yachievabl e wit hSC R NO xcontrol
. Projec t applicant s ma yattemp t t o demonstrat e tha t 9 ppm/1 8 ppmi s no t BAC T fo r a particula r project
. However , th e applican t mus t demonstrat e wha t uniqu e circumstance s preclud e thi s leve l o f contro l fo r th e projec t a s compare d t o othe r project s whic har e proposin g o r achievin g 9 ppm/1 8 ppm . NYSDE C wil l revie wthes e demonstration s case-by-case
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- Applicabilit v Thi s polic yapplie s t o al l ga s turbin e project s subjec t t o PS D review! ' Sinc e i t i s EPA' s polic ytha t BAC T determination s ar e no t fina l unti l th e fina l PS D permi t i s issued , thi s polic yapplie s t o al l PS D project s whic hhav e no t receive d a fina l permi t from NYSDE C * a s o f thi s date
. Al l non-PS D ga s turbin e project s fo r whic hNYSDE C ha s receive d application s prio r t o 11/8/9 0 ar e no t affecte d b ythi s policy
. However , al l non-PS D ga s turbin e project s fo r whic hNYSDE C ha s no t receive d a n applicatio n a s o f 11/8/9 0 ma yb e subjec t t o thi s polic y pursuan t t o th e Stat e Environmenta l Qualit yRevie wAc t ( 6 NYCRR Par t 617)
. Th e applicabilit yo f thi s polic ypursuan t t o SEQR wil l b e determine d o n a case-by-cas e basis
. Backgroun d Ther e ar e a larg e numbe r o f ga s turbin e project s bein g propose d throughou t th e Northeas t a t thi s time
. Ne wYor k Stat e alon e ha s 2 0 application s pendin g fo r ga s turbin e projects
. Thi s mayb e th e resul t o f severa l factor s including a n apparen t abundanc e o f affordabl e natura l gas , financia l incentive s fo r cogeneratio n facilities , an

d th e developmen t o f a biddin g system fo r utilitie s t o mee t increasing powe r demand
. Regardles s o f th e reasons , du e t o th e larg e numbe r o f projects , NYSDE C an d al l o f th e NESCAUMstate s ar e concerne d abou t th e potentia l cumulativ e impact s o f NO x emission s fro

mthes e facilitie s wit hregar d t o th e Northeas t ozon e non-attainmen t ..and
. aci d depositio n problems
. I n ligh t ;o f these

problems , NESCAUMha s develope d a polic yregardin g ga s turbine ' emission s whic hcall s fo r NO xemissio n level s simila r t o thos e include d i n thi s policy
. Fo r a n 8 0 MWsingl e ga s turbin e project , approximatel y30 0 tons/yea r o f potentia l NO xemission s ca n b e remove d byreducin g NO x emission s from2 5 ppmgas/4 2 ppmoi l down t o 9 ppmgas/1 8 ppmoil
. 30 0 tons/yea r o f NO xemission s ma yno t significantl ycontribut e t o th e Northeas t ozon e an d aci d depositio n problem s alone
. However , th e cumulativ e potentia l NO xreduction s fromal l o f th e ga s turbine s combine d i s significant
. I n Ne wYor k State , cumulativ e NO xreduction s fo r th e 2 0 propose d project s (172 0 MW ) exceed s 600 0 tons/year
. Ther e ar e severa l ga s turbin e project s i n Ne wYor k Stat e an d i n th e Northeas t tha t ar e proposin g th e installatio n o f SC R control
. A lis t o f thes e project s ca n b e foun d i n attachmen t one . I t i s apparen t tha t SC R technologyi s a technicall yfeasibl e metho d o f obtainin g 'significan t NO xreductions
. Sinc e significan t NO x emission s wil l b e achieve d a t som e facilities , th e sam e degre e o f contro l shoul d appl yt o simila r ne wprojects
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- Applicant s mus t us e th e Top Dow n approac hi n demonstratin g tha t 9 ppmga s an

d 1 8 ppmoi l i s beyond BACT . I n doin g so , i n orde r t o rul e ou t a contro l optio n base d o n economics , th e applican t mus t presen t wh

yth e cos t o f installing th e contro l fo r thei r projec t i s significantl yhighe r tha n th e cos t fo r othe r project s offerin g th e sam e controls
. Thi s approac hi s supporte d i n EPA' s draf t writte n guidanc e entitle d "TO P Down " Bes t Availabl e Contro l TechnologyGuidanc e Documen t date d Marc h15 , 1990
. Acopyo f thi s documen t ma yb e obtaine d fromth e Burea u o f Sourc e Control
. A s a n example , conside r a simpl e cycl e ga s turbin e projec t tha t wil l b e use d t o provid e pea k power . I t i s technicall yfeasibl e t o achiev e 9 ppmo n ga s an d 1 8 ppmo n oi l b

yinstallin g SCR . However , thi s woul d requir e coolin g th e exhaus t ga s prio r t o enterin g th e SCR . Afte r reviewin g th e lis t o f cogeneratio n project s i n attachmen t one , i t i s eviden t tha t thi s woul d b e a n expens e uniqu e t o thi s typ e o f project
. Further , a peakin g uni t i s ofte n limite d i n th e annua l hour s o f operation
. Thi s limi t reduce s th e potentia l annua l NO xreductions , whic hi n tur n increas e th e cost/to n o f NO x remova l b

ySCR . An applican t coul d presen t thes e factor s i n a To p Down BAC T analysi s t o demonstrat e tha t SC R i n thi s cas e i s beyond BACT .
Futur e Disposition
. Th e technologyfo r controlling NO xemission s fromga s turbine s i s rapidl yevolving
. Thi s polic yreflect s th e situatio n a s i t exist s now . Howeve r futur e development s suc ha s "Dry-Lo wNOx " combustio n ma ycaus e change s t o thi s policy
. A s thes e development s occur , th e Burea u o f Sourc e Contro l wil l reconside r an d modif ya s necessary thi s policy
. cc : Regiona l Director s o f Environmenta l Qualit yEngineerin gGa s Turbin e Project s i nthe Northeas t Permittedvit hor Proposin g SCRNOxContro l 2/22/9 1 Projec t Nam

e Stat e
DunkirkCogen HadsonPowe r Eas t Syracus e KEAC Partner s Indec kOlean Sithe/Alco a Indec kCorint h Selkir kCogen Wallkil l IP P Guilderlan

d Pawtucke t Powe r CogenTechnologie s OceanStat e Powe r MASSPOWER Altresc o Ventro n CN GLakewood ArrowheadCogen 

### N Y N Y N Y N Y N Y N Y N Y N Y N Y N Y R I N J R I M A M A M A N J V T Siz e


### 5 0 8 0 10 0 14 5 7 9 7 9 10 0 25 2 15 0 23 0 6 0 16 5 50 0 24 6 16 0 2 8 21 0 2 5 Back-u

p Oi l Us e Ye s Ye s Ye s Ye s 

### Ye s Ye s Ye s 

### Ye s Ye s 

### Ye s Ye s 

### Ye s Ye s Ye s Ye s Ye s 

### Ye s Ye s NOxlimi t

Gas/Oi l 9 ppm/4 8 pp

m 9 ppm/6 5 pp

m 9 ppm/3 0 pp

m 9 ppm/1 8 pp

m 9 ppm/1 8 pp

m 9 ppm/1 8 pp

m 9 ppm/1 8 pp

m 9 ppm/1 9 pp

m 9 ppm/3 0 pp

m 9 ppm/3 0 pp

m 9 ppm/1 8 pp

m 1 5 ppm/6 5 pp

m 9 ppm/4 2 pp

m 9 ppm/1 8 pp

m 9 ppm/1 8 pp

m 9 ppm/ 9 pp

m 9 ppm/2 1 pp

m 9 ppm / Statu s

Proposed Propose d Proposed Proposed Proposed Proposed Proposed Proposed Propose d Proposed Permitted Operating Permitted Permitted Operating Permitted Proposed Permitted

••-/•fcS** 1 - ' ' .

Attachmen t (l )