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# OAR Box 1778 Prepped byOllie Stewart



## Document

Number: 

# 76 ) ll-C-1 8 Docket Number: 

# A-90-0 6

Printed 10/28/20089:50:55AM

Sheet 76 of 276P. 2

< 

# SB? . U J

a
Marc h8 , 199 0 

### II-C-1 8

UNITED STATES ENVIRONMENTAL PROTECTIONAGENC Y REGIO N5 23 0 SOUTHDEARBOR

NST . CHICAGO, ILLINOI

S 6060 4 REPLYT OTH E ATTENTION OF : Mr . Timoth

yJ . Metho d Assistan t Commissione r Offic e o f Ai r Managemen t Indian a Departmen t o f Environmenta l Managemen t 10 5 Sout hMeridia n Stree t Pos t Offic e Bo x601 5 Indianapolis , Indian a 46206-601 5 D63 T Mx . Method : Pleas e b e advise d tha t n yJanuary30 , 1990 , lette r t o you r regarding th e Clea n Coa l Technology(CCT ) projec t a t Norther n Indian a Publi c Servic e Coirpany' s (NIPSCO ) Baill yGenerating Station , shoul d b e modified . Whil e the ' Environmenta l Protectio n Agenc y(EPA ) continue s t o agre e wit hth e Stat e tha t Clean . Ai r Ac t (CAA ) provision s fo r ne wscurc e performanc e standard s (NSPS ) an d ne wsourc e revie w(NSR ) d o no t appl yi f th e condition s outline d i n my Januar y30 , 1990 , lette r ar e met , some revision s ar e necessary . O n pag e 8 , th e sectio n o n "Condition s fo r Permanen t Control s o r Device s t o B e Considere d Ne t Les s Environmentall yBeneficial " shoul d b e change d a s folloi-/s :

I n fir.j t paragraph , second sentenc e (chang e underlined ) - "At thi s time , EFA . anticipate s tha t it s rulin g wil l inclurL

e a presumptio n tha t suc hpollutio n control s wil l no t resul t i n a n environmenta l harm , wit h respec t t o permanen t controls , i f th e sourc e demonstrate s that: "

I n th e second conditio n (chang e underlined ) - "2 . Ther e will-b e n o environmenta l harmresulting fromth e propose d activities . Thi s incline s condition s tha t th e propose d chang e woul d no t by itself : 

### (a ) (no change )

(b ) increas e th e annua l amission s c f anypollutan t regulate d unde r th e CAA; " (delet e th e Tffiras e "a s a resul t o f increase d capacit y utilizatio n rate )P. 3

- 2 - Inser t ne wparagrap hafte r conditio n 2 d - "Change s whic har e expecte d t o increas e emission s t o th e atmosphere , suc ha s change s whic hincreas e a source' s hourl yoperatin qcapacit y(e.e . , eliminating a bottleneck) , hourl yemission s rat e (e.g. . on e pollutan t decrease s bu t anothe r increases) . o r utilizatio n rat e (e.g. . a n anticipate d increas e i n hour s o f operatio n resulting fromth e installatio n o f controls ) woul d no t b e affecte d b ythi s interpretatio n an d woul d continu e t o b e potentiall ysubiec t t o NS R and NSPS . Th e EF Awil l presume , however , tha t th e additio n o f a contro l devic e wil l not , b vitself , resul t i n a n increas e i n capacit yutilization . However , thi s presumptio n wil l b e overcom e i f ther e i s a clea r likelihoo d tha t operatin g hour s o r productio n rate s wil l increas e becaus e o f th e installatio n o f th e device . O n pag e 10 , a corresponding chang e shoul d als o b e mad e t o amend th e firs t ful l paragrap ha s follow s (chang e underlined) : "Th e EF Aals o anticipate s tha t it s interpretativ e ruling will.. . I n assessing whethe r anyne t increas e i n actua l emission s o f anypollutant , ove r representativ e actua l emissio n rates , i s likel yt o occu r a s a resul t o f th e additio n o f controls , th e reviewing agenc yshoul d conside r th e economi c incentive s t o increas e productio n rate s o r hour s o f operation s associate d wit hth e installatio n and us e o f th e contro l device . Wher e increase d emission s du e t o increase d utilizatio n o f th e facilit yar e clearl ya likel y resul t fromadditio n o f th e device , th e chang e shoul d no t b e considere d environmentall ybeneficial. " (Delet e las t sentenc e o f paragrap hstarting wit h"Th e authority...) . I f yo u hav e anyfurthe r questions , pleas e contac t Mr . Ro n Va n Mersberge n a t (312 ) 886-6056 . Sincerel yyours ,

Davi d Kee , Directo r Ai r and Radiatio n Divisio n cc : WilliamR . Elliott , NIPSC O Thoma s R . Anderson , Sav e th e Dune s Counci l