# OAR Box 1132 Prepped by Candice Davis



### Document

Number: 

# 13 ) ll-C- 9 Docket Number: 

# A-86-0 3

Printed 4/18/20082:24:46

PM Sheet 13 of 122 P. 1P. 2 

## ^!fX pr-M-o*jr-c-<?

UNITE D STATE S ENVIRONMENTA L PROTECTION AGENC Y

WASHINGTON

, D.C. 2046 0 

### JU N -4I9& 7

OFFIC E O F AI RAN D RADIATIO N

Thomas J . Donohu e Presiden tan d Chie f Executiv e Office r America n Truckin g Association , Inc . 220 0 Mil l Road Alexandria , V

A 2231 4 Dea rMr , Donohue : Than X yo u fo rexpressin g you rview s o n diese l fue l sulfu r control . Briefl y recappin g th e event s leadin g up t o ou r curren tstud y o n sulfu rcontrol , EP A establishe d th e NO x an d particulat e standard s i n Marc h o f 198 5 fo rtruck s an d buse s startin g wit h th e 3 98 8 mode l year . Th e sulfu rissu e wa s raise d b y severa l manufacturer s a ttha ttime , controllin g fue l sulfu rwa s no ta feasibility * however , EP A di d agre e t o detai l a talate rdat e (fo rfurthe r 1 0 606 , Marc

h 15 , 1985 , and th e Regulator y Oxide s o f

Nitroge n Pollutan tSpecifi cStud y Analysi s o f

Comments , March , 1985) . bu tEP A conclude d tha t prerequisit e t o tra p stu^ y th e issu e i n more background , se e 5 0 P R Impac tAnalysis , an d Summar

y an d O n Jun e 17 , 1986 , aFedera l Registe rnotic e announce d th e availabilit y o f

apreliminar y repor to n diese l fue l qualit y an d i t s effect s o n emissions , performance , durabilit y an d costs . A docke twa s opene d (A-86-03 ) t o receiv e comment s o n th e report . W e hav e bee n analyzin g thes e comments , an d i n additio n hav e bee n preparin g aor e detaile d analyse s o f som e o f

th e issue s suc h a s th e effec to f sulfu ro n engin e sulfu rcontrol s an d th e effec to f sulfu r engin e technolog y an d cost . Thes e wil l b e t o b e complete d nea rth e en d o f thi s year . procee d wit h aforma l rulemakin g wil l b e mad e o f thi s study . wear , th e cost s o f conten to n require d compile d i n astud y A decisio n t o upo n completio nP. 3



### On e o f th e mor e difficul t aspect s o f

thi s stud y i s ou r evaluatio no f

th e type s o f

technologie s tha t

woul db e use dt o mee t th e 199 1 an d199 4 heavy-dut y diese l particulat e standard s on curren t

fue l versu s alow-sulfu r fue l an dan y resultan t cos t differential

. W

e hav e requeste ddetaile dprojection s o nthi s issu e fro mal l o f

th e heavy-dut y engin e manufacturer s i nou r meeting s ontra p developmen t efforts

. T

o date , anumber

o f manufacturer s hav e submitte dgenera l statement s concernin g th e effec t o f lo w sulfu r

fue l o n potentia l compliance

. However , littl e detaile dinformatio nsupporte db y complet e tes t dat aha s bee n received

. Suc hinformatio ni s critica l i f EP A i s t o accuratel y quantif y th e effec t o f diese l fue l sulfu r

contro l on th e heavy-dut y die3e l industry , an ddetermin e th e industry' s abilit y t o mee t

th e 199 1 an d199 4 standard s wit han dwithou t sulfu r control

. W

e ar e continuin g t o wor k wit hth e manufacturer s o

n this

. Som

e recen t

informatio nreceive dfrom manufacturer s indicate s tha t substantia l number s o f engine s ma

y mee t th e 0.2 5 g/BHP-h r

particulat e standar dwithou t trap s an d withou t sulfu r control

. I n summary , we ar e pushin g ahea dwit hbu r stud y o nth e basi s o f

ou r ow nanalyse s an dth e informatio nw e hav e receive d t o date

. Than

k you agai n fo r

providin g you r

perspectiv e o nth e importanc e o f

reducin g sulfu r

level s i ndiese l fuel

. I assur e yo u you r comment s wil l receiv e carefu l consideratio n i nou r deliberatio no

nthi s issue

. Sincerely , DON H
. CLA Y FO R 

### J
. Crai g Potte r Assistan t

Administrato r fo r Ai r an dRadiatio n