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# OAR Box 1778 Prepped byOllie Stewart



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Number: 

# 79 ) ll-C-2 1 Docket Number: 

# A-90-0 6

Printed 10/28/20089:50:55AM

Sheet 79of 276^-£A .

1 tJNITED STATE S ENVIRONMENTA L PROTECTIO NAGENC Y WASHINGTON, D.C . 2046 0 

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# m. DE C 3199 0 II-C-2 1



## E I 1 1 U U Mr . Rober t Ralsto n Statio n Manage r Dayton Powe r an

d Ligh t Compan

y J.M . Stuar t Electri c Generating Station \\\\\\ JU NI ? 199 ! P.O . Bo x 46 8 Aberdeen , Ohi o 4510 1 OFFIC E O F AI R AN D RADIATIO N

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### > AAI R DOCKE T Dea r Mr . Ralston : I a mrespondin

g t o you r Septembe r 24 , 199 0 lette r i n whic h yo u requeste d a n o actio n assuranc e lette r fro m th e Unite d State s Environmenta l Protection Agency(EPA ) fo r a Clean Coa l Technolog y (CCT ) project . Yo u hav e requeste d an assuranc e fro mEP Ano t t o enforc e Ne wSourc e Performanc e Standard s (NSPS ) an d Preventio n o f Significan t Deterioratio n (PSD ) regulation s a t Dayto n Powe r an d Ligh t Company , J.M . Stuar t Station Uni t No . 4 . Du e t o the languag e i n th e recentl yenacte d Clean Ai r Ac t Amendment s whic h exempt s temporar

yCC T projects , a s define d therein , fro m PS D an d NSPS , i t i s n o longe r necessar yfo r EP

At o issu e n o action assuranc e letter s fo r CC T projects . Sectio n 415(b)(2 ) o f th e Clean Ai r Ac t state s tha t the "[installation , operation , cessation , o r remova l o f a temporar y clean coa l technolog ydemonstratio n projec t tha t i s operate d fo r a perio d o f five year s o r less , an d whic hcomplie s wit hthe Stat e implementatio n plan s fo r th e Stat e i n whic hth e projec t i s located an

d othe r requirement s necessar yt o attai n an

d maintai n th e nationa l ambien t ai r qualit ystandard s during an d afte r th e projec t i s terminated , shal l no t subjec t suc hfacilityt o th e requirement s o f section 11 1 o r par t C o r D o f Titl e I. " Thi s exemptio n applie s t o "physica l o r operationa l change s t o existing facilitie s fo r th e sol e purpos e o f installation , operation , cessation , o r remova l o f a temporar yclean coa l technolog

ydemonstratio n project. " Th e statut e define s clean coa l technolog ya s "an

y technology , includin g technologie s applied a t th e precombustion , combustion , o r pos t combustio n stage , a t a ne wo r existin g facilitywhic hwil l achieve significan t reduction s i n ai r emission s o f sulfur dioxid e o r oxide s o f nitroge n associate d wit h the utilizatio n o f coa l i n th e generation o f electricity , proces s steam , o r industria l products , whic hi s no t i n widespread us e a s o f th e enactmen t o f [Titl e IV]. "P. 3 

# ' 4

Thi s CC T projec t wil l demonstrat e technolog yfo r reducin

g nitrogen oxid e (NOx ) emission s throug hthe us e o f low-NO x cel l (LNC ) burners . According t o you r letter , LN C burner s can reduc e NO xemission s b

ya t leas t 5 0 percent . EP Asupport s thi s demonstratio n o f LN C burner s a s a mean s o f potentiall yreducin g NOxemission s fro

mutilit yboilers . Asuccessfu l demonstratio n o f thi s technolog

yshoul d provid e industr ywit han attractive , cos t effective , retrofittabl e optio n fo r us e i n achieving NO x control . Base d o n th e representation s mad e i n you r Septembe r 24 , 199 0 lette r an

d th e statutor

yprovisions-i n Titl e IV , th e LN C burne r demonstratio n a t J.M . Stuar t Statio n Uni t No . 4 wil l no t b e subjec t t o PS D o r NSPS . Thi s nonapplicabilitydeterminatio n onl y applie s t o J.M . Stuar t Statio n Uni t No . 4 , wher e th e demonstratio n i s being conducted . I t doe s no t appl yt o emission increase s above pre-demonstratio n level s tha t ar e attributabl e t o physica l o r operationa l change s othe r than thos e necessar yt o restor e th e uni t t o it s pre-demonstratio n conditio n o r whic h resul t fro

mphysica l o r operationa l change s tha t ar e unrelate d t o th e conduc t o f th e demonstratio n project . Furthermore , althoug h exemp t fro

mPS D an

d NSPS , th e CC T demonstratio n projec t a t J.M . Stuar t Statio n Uni t No . 4 mus t stil l compl ywit hal l othe r applicabl e Clean Ai r Ac t requirements . EP Ai s planning t o issue a n interpretative rulin g whic haddresse s th e exemptio n i n section 41 5 o f Titl e IV

fo r Clean Coa l Technolog ydemonstratio n projects . Pleas e keep U.S . EPA' s Regiona l Offic e i n Chicag o notified o f th e statu s an

d significan t result s o f thi s project . Your contac t ther e wil l b e Mr . Davi d A . Ke e wh o can b e reache d a t (312 ) 353-2212 . Sincerely , William'G . Rosenber g Assistan t Administrato r fo r Ai r an

d Radiatio n