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# OAR Box 1830 Prepped by Ollie Stewart



### Document

Number: 

# 102)IV-C-6 8
Docket Number: 

# A-87-1 1

Printed 11/13/2008 7:20:56

AM Sheet 102 of 232i.

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TM - J, ' EL2

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### I ,£ , i UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y ^ 5SBJ / WASHINGTON , D.C . 2046 0
,,-,•• FE B i 2 19 8

OFFIC E O F AIRAND11ADUTIOM

Honorabl e Hank Brow n Hous e o f Representative s Washington , D.C . 2051 5 Dea r Mr . Brown : Than k yo u for you r lette r forwardin g the concern s o f your constituent , Ms . Att a De e Ogden , abou t ou r proposed gasoline volatilit y

regulations . We wil l b e placin g thes e comment s i n th e rulemakin

g docket. . Fro m ou r analysi s o f refiner y an d natura l ga s liquid s industr y impacts , w

e expec t tha t implementatio no f th e proposed RV P reductio

n t o 9 ps i i nClas s C area s (an d proportionall y elsewhere ) woul d remov e a significan t quantity o f butane fro

m us e a s a gasoline component . Mos t o f thi s butan e i s currentl y produced b

y refineries , bu t a significan t portion come s fro m natura l ga s processin g facilities . W e concluded tha t a substantia l portionwil l b e purchased (a s a petrochemica l feedstock , for example ) wit honl y a smal l decreas e i n price . The averag e increas e i n the pric e o f gasoline woul d b e abou t on e cen t pe r gallon . Regardin g emissio

n reductions , our analysi s conclude s tha t the proposed volatilit y reduction s represen t the singl e larges t sourc e o f moto r vehicl e VO C contro l availabl e ( a nationwide reductio no f abou t eight percent) . Volatilit y

control s migh t increas e oi l import s unde r certai n circumstances , bu t the overal l effec t i s no t likel y t o b e severe . Volatilit y reduction s woul d clearl y requir e additiona l hydrocarbon refiner y stocks . I f refinerie s purchas e crude oi l for thi s replacemen t stock , muc ho f i t ma y b e imported . Offsettin g this , however , woul d b e the reductio nin curren t butan e import s resultin g fro m the surplu s domesti c suppl y o f butane . Alternatively , i f mos t refiner s us e the surplu s butane a s th e replacemen t hydrocarbonstoc k (throug h alkylatio

n o r conversio

nt o MTBE) , an

y effect s o

n energ y import s woul d b e small . W e wil l continue t o analyz e thi s issue .P. 3

- 2

-

Ou r analyse s o f th e environmenta l an d economi c impact s o f a summertim

e volatilit y

contro l progra

m ma y b e foun

d in th e Federa l Registe r notic e an d ou r Draf t Regulator

y Impac t Analysis , availabl e throug hTa d Wyso r o f m

y An nArbo r staf f (313-668-4332) . We ha d a publi c hearin

g inOctobe r an

d expec t t o receiv e numerou s additiona l comment s o nthi s rulemakin

g befor e th

e en d o f the commen t perio d (Februar

y 11 , 1988) . We wil l full y conside r al l o f thes e comment s indevelopin g our fina l regulator

y analysis . Le t m e kno w i f w e ca nb e o f furthe r assistance . Sincerel y

yours , ORIGINA LSIGNED B Y 1 RICHAR D D

. WILSONf 

### Richar d D . Wilso n Director , Offic e o f

Mobil e Source s

Prepare d by : For

mLetter:sal:2/8/88:AL88046 5 - ECTD , An n Arbor , M I
bcc : Regio n 0 8 Congressiona l Liaiso n Docke t No
. A-85-2 1 c/ o Jacki e McManu s