ExxonMobi l

Refinin g & Suppl yCompan y Safety , Healt h an d Environmen t P.O
. Box639 0 Kingwood , Texa s 7732 5 28 1 36 0 458 0 Telephon e Da n J
. Horto n Stat e Regulatio n Adviso r Downstrea m & Chemica l SH& E 

## E^onMobi l Refining & Supply

Jun e 30,200 4 Mr
. Robert Donaldso n Busines s Complianc e Division , Burea u o f Wast e Preventio n Departmen t o f Environmenta l Protectio n On e Winte rStree t Boston , M A0210 8 Re : Massachusett s Ai r Pollutio n Contro l Regulation s Engine s an d Combustio n Turbine s 31 0 CM R 7.0 0 an d 31 0 CM R 70.0 0 Dea rMr
. Donaldson, ExxonMobi l Refinin g an d Suppl yCorporatio n (ExxonMobil ) i s please d t o submi t comment s o n th e propose d amendment s t o th e Ai rPollutio n Contro l Regulation s identifie d above
. ExxonMobi l i s a majo rsupplie ro f moto rfuels , heatin g oils , an d lubricant s t o ou r customer s i n Massachusett s wit h ove r50 0 brande d servic e station s delivere d ou t o f tw o larg e produc t distributio n terminals
. Th e amendment s t o 31 0 CM R 7.0 0 propos e tha t stationarydiese l fuele d engine s b e require d t o utiliz e onl yUltr a Lo wSulfu rDiese l fue l (ULSD) , on-roa d fuel , whe n i t become s availabl e i n 2006
. Th e Departmen t suggest s tha t thi s chang e wil l resul t i n a 99.5 % reductio n i n sulfu rdioxid e emission s whe n compare d t o th e curren t heatin g oi l sulfu rlimits , (1 5 pp m S vs . 300 0 pp m S)
. However , th e Departmen t fail s t o provid e an ysupport fo rth e nee d fo rthi s amendmen t o rth e impac t th e amendmen t wil l hav e o n curren t ambien t ai rqualit ynon-attainmen t standards
. Neithe rca n th e Departmen t provid e th e numbe ro f stationar yengine s tha t thi s regulatio n wil l impact , ho wth e Departmen t wil l communicat e thi s chang e t o th e vas t majorit yo f facilitie s tha t ar e unpermitted , o rth e anticipate d annua l volum e o f ULS D tha t woul d b e require d b ythes e stationaryengines
.

A n ExxonMobi l Subsidiary(2 )
Jun e 30 , 200 4

Mr
. Donaldson , ExxonMobi l suggest s that th e Departmen t mus t firs t develo p a legitimat e cas e fo r th e nee d fo rregulatin g th e diese l sulfu rlevel s fo rstationar yengine s unde ra separat e an d shorte rimplementatio n schedul e tha n mandate d b yth e federa l government . That ha

s not bee n don e byi n thi s case . Unde rsectio n III
. Ai rQualit yImpacts , th e purpos e of thes e amendments i s "..reduction s o f emission s suc h as sulfu rdioxide , particulates , carbo n monoxide"
. Onl yne wstationar

ydiese l engine s wil l derive benefit s beyon d a sulfu rdioxid e emissio n reduction
. Existin g stationar yengine s d o not have th e ne wtechnolog y t o realiz e al l of thes e emission s reduction s an d therefore , emissio n reductio n benefit s wil l b e limite d t o a sulfu rdioxid e reduction
. A n almost equivalen t reductio n of al l emission s ca n realize d i n th e stat e b yadoptio n of th e U S EPA' s off-roa d diese l fue l regulation s fo rne wemergenc

yan d non-emergenc

ystationar

y diese l engines
. I f th e Departmen t ca n develo p a cas e fo rneed , ExxonMobi l suggest s that th e Departmen t conside rrequirin g th e U S EPA' s off-roa d diese l fue l regulations
. Adoptio n b

yth e Departmen t of th e U S EPA' s off-roa d diese l fue l specification s an d implementatio n schedul e fo rstationar ydiese l engine s will : 1 ) mandat e tha

t th e sulfu rconten t of off-roa d diese l fuel , limite d t o 50 0 pp m S b y2007 , b e extende d t o th e affecte d engines , an d 2 ) provid e sulfu rdioxid e emissio n reduction s equivalen t t o 90 % vs . 99.5 % i n th e proposa l withi n on e yea rof th e Department' s proposal , and , 3 ) coordinat e wit h th e arriva l of off-roa d diese l fue l int o th e suppl ysyste m an d allowloca l fue l deliver ycompanie s that delive rsmal l volume s t o thes e smal l usag e accounts , an d 4 ) avoi d ta

xissues
. ULS D i s sol d wit h federa l an d stat e taxe s include d at th e loadin g rack
. Thes e facilitie s woul d b e require d t o pa ythes e taxe s the n late rappl yfo rrefunds , a situatio n bot h costl yfo rth e custome ran d that open s th e doo rt o taxavoidanc e schemes
.(3 )
Jun e 30 , 200 4

Mr
. Donaldson , I n summary , ExxonMobi l suggests that th e Department' s proposa l t o mandat e ULS D i n 200 6 fo rstationar ydiese l engine s i s unsupporte d b yneed , unenforceable , an d ma

ycreat e unforesee n problem s fo rcustomer s an d th e State
. Thes e problem s ca n b e avoide d an d virtuall yth e entire anticipate d emissio n reductio n benefi t ca n b e realize d b ychangin g thi s proposa l t o incorporat e th e sulfu rconten t limit s an d implementatio n timetabl e fro m th e U S EPA' s off-roa d diese l fuels
. ExxonMobi l appreciate s th e opportunit yt o provid e thes e comments t o th e Departmen t an d we are prepare d t o discus s th e alternative s t o thi s proposal
. Sincerely ,