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# OAR Box 1790 Prepped by Keeia Richards



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Number: 

# 245 ) ll-F-3 5 Docket Number: 

# A-90-3 7

Printed 10/31/200812:43:17

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OFFIC E OF NANA6EXEN T AN D BUDGE

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NS R Issues " < & Reinforc e positive aspect s ofWEPC o "causa l link " provisio n (-deman d growt h exclusion " i n proposal) , usin g languag e fro m 109 2 WEPC o preamble , not merel y referencin g th e package . "Th e ter m 'modification * mbant. Any phyo'e* ! •hang vIn , © rchang e I n ih e metho d o fopwertio n of , a stationarysourc e whic h Increase s th e amoun t o f an yai rpollutan t emitte d b ysuc h sourc e o rwhic h result s I n th e emissio n o f an yai rpollutan t not previousl yemitted. " "Th e NS R regulator

yprevision s requir

e tha t m e physica l o roperationa l chang e 'resul t in ' a n increas e i n actua l emission s i n orde rt o conside rtha t Cfiaftgetob d modification . I n othe rwords . NS R wil l not appll yunlee e EP A find s tha t ther e i s a causa l lin k betwee n th e propose d chang e an d an ypost chang e increas e in

emissions. ' ".. . wher e increase d operation s ar e i n respons e t o independen t factors , suc h a s system-wid e deman d growth , whic h woul d hav e occurre d an d affeote d te n unit' s operation s eve n i n th e absenc e o fth e physica l o roperationa l change , suc h increase s d o not resul t fro m th e chang e an d shal l b e exclude d fro m th e projectio n o ffuture actua l emissions, " ".. . durin g a representativ e baselin e perioeMb e plan t mus t ahv e bee n abl e t o accommodat e th e projecte d deman d prowht)physicali yan d legall yeve n absen t th e particula rchange. " "Consequently , wher e projecte d increase d operation s ar e i n reposn e t o a n Independen t factor , suc h a s deman d growth , whic h coul d hav e occurre d an d affecte d th e unit' s operation s durin g th e representative baselin e perio d eve n i n th e absenc e ofth e physica l o roperationa l change , th e increase d operation s canno t b e sai d t o resul t fro m thechang e an d tnerefor e ma yb e exclude d fro m th e projectio n o fth e unit' s futur e actua l emissions. " "I fefficiencyimprovement s ar e th e predominan t caus e o fth e chang e i n emission s an d deman d growt h i s not , th e exclusio n doe s not apply . .. . EP A decline s t o creat e a presumptio n tha t ever yemission s increas e tha t follows a chang e i n efficienc yi s inextricabl ylinke d t o th e efficienc ychange. " "Finally , thi s ne wprovisio n doe s no t diminis h th e scop e o fth e coverag e of EPA' s NS R regulations . Rather , i t merel yincorporate s int o th e eotual-to future-actua l methodolog ya requiremen t o fth e pre-existin g statutoryan d regulatoryscheme. "