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# OAR Box 1846 Prepped byOllie Stewart



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# 13 ) ll-C- 1 Docket Number: 

# A-90-07

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### U-CL-o l
UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y

WASHINGTON, D.C . 2046 0

SE P 2 7 1990 OFFIC E O F AI R AN O RADIATIO N Dougla s Durant e Washingto n Representativ e Clea n Fuel s Developmen t Coalitio n Ai r Right s Building 731 5 Wisconsi n Ave . Suit e 51 5 Eas t Towe r Bethesda , M D 2081 4 Dea r Mr . Durante : . .s 

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Thi s i s i n respons e t o you r Septembe r 4 , 199 0 lette r requesting guidanc e regarding EPA' s Advanc e Notic e o f Propose d Rulemaking (ANPRM ) o n Fue l an d Fue l Additiv e Registratio n (5 5 FR 32218 ; Augus t 7 , 1990) . I n tha t lette r yo u expresse d concer n abou t th e potentia l impac t o n producer s o f ethanol , methy l tertiarybuty l ethe r (MTBE ) an d ethy l tertiarybuty l ethe r (ETBE) . A s yo u mayknow , currentl yunde r Sectio n 211(b)(1 ) o f the Clea n Ai r Ac t (CAA) , designate d moto r vehicl e fuel s an d additive s mus t b e registere d wit hth e EPAprio r t o thei r sal e o r introductio n int o th e marketplace . A s i s presente d i n th e regulation s implementing thes e provision s (4 0 CF R Par t 79) , thes e consis t o f moto r vehicl e gasolines , diese l fuels , an d thei r additives . Sinc e MTBE , ETBE , an d ethano l ar e no wfue l additives , theyar e covere d b ythes e requirements . Th e progra

mt o b e develope d unde r Sectio n 211(b)(2 ) a s par t o f th e registratio n requiremen t wil l encompas s the assessmen t o f health , welfare , an d emissio n contro l system effect s o f fuel s an d additives . A s discusse d i n th e ANPRM , w e ar e considering a tiere d approac hwhereb yincreasing level s o f requirement s wil l b e organize d int o tiers , an d producer s wil l onl ynee d t o complet e th e tier s necessaryt o provid e adequat e informatio n fo r regulatorydecisio n making . Thi s approac h woul d b e on e wayi n whic hth e cos t an d effort s o f complying wit hth e registratio n requirement s coul d b e minimized .

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On e importan t aspec t o f thi s program , an d on e tha t yo u raise d i n you r letter , i s the provisio n i n Sectio n 211(e)(3)(C) . Thi s sectio n provide s the Administrato r wit hthe authorit yt o "exempt " an yfue l o r additiv e fro mth e regulation s "upon a finding tha t an yadditiona l testing o f suc hfue l o r additiv e woul d be duplicativ e o f adequat e existing testing" . W e ar e sensitiv e t o you r concern s regarding thi s issu e and , a s mentione d i n the ANPRM , w e ar e soliciting idea s o n way s i n whic ht o handl e it . A s o f yet , however , w e canno t provid e yo u definitiv e informatio n sinc e no decision s hav e bee n mad e an d w e ar e i n the earl ystage s o f progra mdevelopment . Althoughw e hav e give n considerabl e though t t o the issues , approaches , an

d concept s presente d i n the ANPRM , pleas e bea r i n min d tha t the purpos e o f the ANPRM i s t o la you t th e issues , infor m th e publi c o f our ideas , an d solici t comments . Ther e i s ye t a significan t amoun t o f wor k t o b e don e i n preparing the Notic e o f Propose d Rulemaking an d w e hav e invite d comment s o n the discussio n i n th e ANPRM . W e than k yo u fo r you r comment s an d w e wil l b e placing themi n the EPAAi r Docket . An y additiona l thought s o r suggestion s yo u mayhav e o n the subjec t woul d als o be appreciated . Th e commen t period , whic hrun s throughOctobe r 26 , 1990 , i s on e wayyo u mayassis t EPAi n shaping thi s progra m an d w e welcome you r participation . I f yo u hav e an yquestion s o r woul d lik e mor e information , pleas e fee l fre e t o cal l Caroly n Krueger , th e contac t perso n liste d i n the ANPRM . He r phon e numbe r i s (313 ) 668-4274 . Sincerel yyours , ORIGINA L SIGNE D BY RICHAR D D.WILSO N Richar d D . Wilso n Director , Offic e o f Mobil e Source s