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# OAR Box 1132 Prepped byCandice Davis



### Document

Number: 

# 12 ) ll-C-1 0 Docket Number: 

# A-86-0 3

Printed 4/18/20082:24:46

PM Sheet 12 of 122P. 2



## y*!> * 

## .ft-03 jr-t'io

UNITED STATE S ENVIRONMENTA L PROTECTION AGENC Y

WASHINGTON

, D.C. 20460

OFFIC E O F AI RAN D RADIATIO N y.r . Thoma s C . Youn g Fxecutiv e Directo r Engin e Manufacturer* ; Associatio n On e Illinoi. 3 Cente r 11 1 Pas t Wacke r Driv e Chicago , I I 60C0 1 Dea r Mr , Younq :

• , Tnan k yo u fo r you r lette r describin g you r concer n vit h c'iese l fue l sulfu r and it s effec t o n coriDlianc e wit hth e 199 1 and 199 4 particulat e standards . Briefl yrecappin g ou r effort s i n thi s are a t c elate , i n Jun e o f 198 6 w e distrihute i fc r conar.«»n t a preliminar yrepor t o n th e effect s o f diese l fue l cjalit vo n emission s an e performance . Vi e hav e bee n analyrin c t> e cedent s receive d o n tni s reoort , an a i n additio n hav e feen . nrenarin n r*.cr

e detaile d analvse s o f son e o i c- 3 tn« r effec t o f rolfu r die:id e t o sulfu r sulfat e o n

i n enom e wea : th e He yissue.

- suc h tn e conversio n o f tn e atmospher e an e th e eftcc t o f culf'i r conten t c n recuire c engin e contro l technolog yand cost . Cne&f c analyse s wil l b e compile d int o a studyt o b e complete d nea r th e em ! o f tni s year . P. decisio n t o r rocee< 5 wit ha forma l rulemakin g aime d a t regulatin g diese l fue l cualit ywil l b e pad e upo n completio n o f thi s study- . On e o f th e r.or

e difficul t aspect s o f thi s studyi s ou r evaluatio n o f tn e type s o f technologie s t.'ia t woulc

1

- h e y-e d t o ree t tn e 199 1 <:nc i i?9 i heavy-cut ydiese l particulat e standard s or . curren t fu M versu = <-, ios—sulfu r fue l an ^ anyresultan t cos t -''.ifferer.-iai . W e nav e requeste r detaile d projection s o o tni s iasu e rro r al l o r tb e neavy-out vengin e iranufacturer s i n ou r r.eotir.n

s o n tra p developmen t efforts . T o date , a nurcoer o f risnufacturer n nav e submitte d genera l statement s concernin g th e effec t o f lo wsulfu r fue l o n potentia l compliance . However , littl e detaile d informatio n supporte d b ycomplet e tes t dat * ha s bee n received . Suc hinformatio n i s critica l i f EP Ai 3 t o accuratel yquantif yth e effec t o f diese l fue l sulfu r contro l o n th e heaw-dut ydiese l industry , ancl determin e th ei - Ftrm: -r.»rar !

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### inou^try 1 

### saM l it y t o ir-ee t th ? 190 1 an r 10 0 4 standard s wit han d withou t sulfu r control . Thus , anyassistanc e EM Acoul d provid e i n contactin g ter.be r companie s and encouragin g the: n t o rrovid e thi s infornjetio n t o FP Aa s soo n a s possibl e woul d b e ver y nclpful . I n r.unwviry , w o ar e pushin g ahes d v/it hou r study , o n tn e basi s c f ou r own analyse s an d th e inforrratio n w e hav e receive d t o d*te . Thnn'" . yo u agai n fo r providin g you r perspectiv e o n th e ircportar-ce c f reoucin qsulfu r level s i n diese l fuel . I assur e yo u cir.-s

t you r coiT^Pt s wil l receiv e carefu l consideratio n i n ou r deliix,-ration o n tni s issue . Sincerel yyours , 

### ORIGINA L SIGNE D E Y RICHAR D D.WILSO N Richar d D . Kilso r Director , Offic e o f Moc-il c Sourco c

ir>cc: T . Darlington , SDS B J . Anderson , SDS D Z\ SpriK , SDS B CDf,!s : Darlington : Parsons : 25 6 5 Plymout hRd . :X473 : 7/2/8 7 : ID ' Las t reviewe d b

yCnarle s Gray:7/13/8 7 AR 893 5P. 4



### *I xS^J

\ UNITE D STATE S ENVIRONMENTA LPROTECTIO NAGENC Y jgy^ L^ WASHINGTON , D.C
. 20460

JU NI3 I9S 7 OFFICEO F

V W IAI RAN D RADIATIO N 

### Hr . Joh n B . Curci o Presiden t an

d Chie f Executiv e Office r Hac kTrucks , inc . ixecutiv

e Office s Bo xH Allentown , P A18105-500 0 Dea r Mr . Curcio : Than k yo u for your lette r describing you r curren t testing an d developmen t efforts . W e ar e please d tha t significan t reduction s in engine-ou t particulat e emission s ar e bein g raaoe, an d look forward t o receiving the result s o f your testing programs , including your recen t developmen t work in achieving a 199 1 lo wmileag e targe t o f 0.1 7 g/BHP-h r wit hlo

wsulfur fuel . an d withou t aftertreatment . Whil e thi s dat a wil l b e importan t in evaluating complianc e strategie s for the lo wsulfu r case , w e woul d lik e t o reiterat e tlia t w e als o nee d t o knowthe projecte d complianc e strategy(ies ) Mack woul d us e for 199 1 wit hcurren t sulfur levels . Thi s informatio n i s o f vita l importanc e i n comparing the cos t o f particulat e reduction s o n the vehicl e (throug hfurthe r reduction s in engine-cu t emissions , an d aftertreatment ) t o the cos t o f particulat e reduction s through fue l controls . I f thi s coul d b e provide d along wit hth e complianc e demonstratio n o n lowsulfu r fuel , i t woul d be very helpfu l t o our analysis . Than k yo u agai n fo r you r significan t effort s in studying thes e issue s an

d reporting th e result s t o EPA .

Sincerely , 

### (Sgd ] J . Ciai gMe i J . Crai g Potte r Assistan t Administrato r fo r Ai r an

d Raciatio nannu m mininr ' UNITE D S~fE S ENVIRONMENTA L PROTECTIO N A"C Y "i;;tf " ) • . a. : 

# ft-8l-ozjr~a-i2- P- 5 „



## JUL f 7 (98 7

Mr . Joh nD . Winter s Vic e President Caterpillar , Inc . 100 0 N.E . Adams Peoria , I I 6162 9
Dear Mr . Winters i Than kyo ufo r supplying additiona l informatio n o n th e effec t o f diese l fue l sulfur o n particulat e emission s fro myou r engines . W e look forward t o meeting wit hyo u i n Ann Arbo r i n th e nea r futur e t o iiscus s futur e Caterpilla r technology . W e appreciat e your transmitta l o f the Chevro n an d Radia n papers . W

e were awar e o f the m and , i n fact , ou r ow n stud yi s aime d a t resolving some significan t uncertaintie s whic hw e perceiv e t o b e presen t in eac ho f them . On e omissio n o f bot h o f thes e estimate s o f the cos t effectivenes s o f diese l fue l sulfu r contro l i s tha t theyd o no t tak e int o accoun t th e "credit " associate d wit hreducing o r eliminating the us e o f exhaus t aftertreatment controls . Thi s credi t i s estimate d a s th e differenc e i n complianc e cos t (witheithe r the 199 1 o r 199 4 standards ) betwee n curren t an d lowsulfu r fuels . I n orde r t o estimat e thi s value , EPAmus t projec t the futur e complianc e strategie s engine manufacturer s ar e contemplating bot hwit han d withou t lo wsulfu r fuel . An yspecifi c informatio n yo u coul d provid e i n thi s are a woul d be ver yhelpful . Sincerely , JL'CLXYFO R 

### J . Crai g Potte r Assistan t Administrato r fo r Ai r an

d Radiatio n