GE Aircraft Engines Joh n M . Crayno n Plan t Manage r- EH& S 100 0 Wester n Avenu e MD164X 9 Lynn , Massachusett s 0191 0 Phone : (781 ) 594-529 7 Fax : (781 ) 594-628 4

Jun e 30 , 200 4 Mr . Rober

t T . Donaldson , Associat

e Directo r Busines s Complianc e Divisio n Burea u o f Wast e Preventio n Departmen

t o f Environmenta

l Protectio n On e Winte r Street, Eight

h Floor Boston , Massachusett

s 0210 8 SEN T VI A FA X AN D FEDERA L EXPRES S Dea r Mr . Donaldson : Than k yo u fo r givin g u s th

e opportunit

y t o commen

t o n th e propose d amendment

s date d Ma y 200 4 to 31 0 CM R7.0

0 an d 31 0 CM R70.0

0 fo r engine s an

d combustio n turbines . Upo n revie w o f th e propose d regulations , G

E ha s th e followin g comments :

• Unde r 31 0 CM R7.26(42 ) - G

E request s tha t MADE P replace "emergenc y engine s an

d turbines " throughou

t wit h "emergenc

y o r standb y engine s an

d turbines. " Thi s section should b e applicable to bot

h emergenc

y and standb

y engines , i n conformity wit h existin g Subpart

s 31 0 CM R7.02(8)(i ) an

d 7.03(10) , whic h hav

e historicall y regulated thes e engin e classification s together . • G E ha s agenera l commen t o n th e applicabilit

y o f small emergenc

y o r stand-b y engin e generator s t o 31 0 CM R7.26(42) . Thi s regulatio n effectivel y increase s regulator y obligation s b y lowerin g th e applicabilit

y threshol d fo r

smal l engines . Previously , emergenc y generator

s wit h ahea

t inpu t les s tha n 3 MMBtu/h r

woul d hav

e bee n exempte d fro mpla

n approva l an d considered Titl e V insignifican t sources . Unde

r 31 0 CM R7.26(42) , a

s proposed , unit s a

s smal l a s 3 7 kW powe

r output (approximately 300,00 0 Btu/h r hea t input ) installe d si x month s o r mor e after th e effectiv e dat

e o f thi s subpart, wil l hav

e to b e certified , mee

t certai n operationa

l limitations , an

d include d a

s a significan t

source/emissio

n uni t o n afacility' s Titl e V Operating permit , onc e th e propose d engin e regulation s ar

e incorporate d int o th

e SIP . I f implemented , thi s woul d plac e a n undu e recordkeeping an

d reportin g burde

n on facilitie s b y requirin g tha t informatio n o n complianc e o f these unit s b

e include d i n th

e semi-annua

l complianc e verification . I n addition , facilitie s woul d b e subject t o highe r operating permi t

fee s base d o n th e inclusio n o f

thes e new , smal l units . Similarly , a s mentioned below , th

e inclusio n o f

existin g unit s rated les s tha n 3 MMBtu/h r

hea t input a s significan t

sources i n facilit y operating permit s woul d result i n adde d paperwor

k an d fee s wit h littl e environmenta l benefit .Mr . Rober t T . Donaldson/MADE

P Jun e 30,200 4 Pag e 2 o f 3 Th e emission s fro mal l o f

thes e small unit s ar

e ver y minor . Mos t

emergency/standb

y unit s ar e operate d o n th e orde r o f abou t 5 0 hour/yea

r o r less , whic h equates t o les s tha n 0. 3 to n NO x pe

r yea r fo r adiesel-fire d generato

r wit h abou

t 37 0 K W powe

r outpu t (hea t input ratin g o f abou t 3 MMBtu/hr) , o

r 0.0 3 to n NO x pe

r yea r fo r auni t wit h 3 7 K W powe r outpu t (approximately 300,00

0 Btu/h r hea t input rating ) base

d o n highl y conservative AP-4 2 emission factors . • Th e stac k heigh t an d emissio n dispersio n requirements o f 31 0 CM R7.26(42)(d) 4 fo r ne w emergenc

y engine s an

d turbine s ar

e bot h onerou s an

d unclear . Th

e propose d requiremen

t tha t a n emergenc

y engin e o r turbin e wit h apowe

r outpu t equa l to o r greate r tha n 30 0 KW , bu t les s tha n 1 M W hav

e aminimu mstac

k heigh t o f te n fee t abov e a facilit y roofto p o

r it s enclosur

e i s impractical . These engine s ar e ofte n locate d jus t outsid e o f alarg e industrial buildin g (a s the y serv e a s backu p t o proces s o

r lightin g withi n th e building ) wit h no "enclosure, " pe r se . Th e ne w regulation s woul d the

n requir e constructin g afree-standin g stac k o f typicall y 7

5 t o 10 0 fee t o r mor e i n orde r to mee t th e requiremen

t t o b e te n foo t abov e th e rooftop . Thi s i s impractical considering these engine s operat

e s o infrequently . I f th e engin e i s les s tha

n 30 0 KW , th e requiremen

t unde r 31 0 CM R7.26(42)(d)4.a. i states tha t location s tha

t ar e subject to downwash o f

th e exhaus t b e avoided . Locatin g a n engin e nex t t o a n industrial buildin g inevitabl y woul d subject i t to som e downwash . Thes e engine s nee

d to b e locate d nex

t t o building s since the

y suppor t th e require d proces s operation s an

d lightin g i n apowe

r outage . However , i t

i s unclea r a s t o ho w t o determin e i f alocatio n i s subject

t o downwash , an

d ho w muc

h downwash (i f

any ) i s acceptable . • Unde r 31 0 CM R7.05(l)(a)3 , 7.26(42)(c) , an d 7.26(43)(c) , regardin g th e sulfu r conten t o f fuel , G E believe s complianc e wit h thi s requiremen t shoul d b e contingen

t upon th e complianc e o f

refinerie s wit h 4 0 CF

R80 . I n addition , th

e complianc e dat

e fo r thi s regulatio n should b

e liste d i n the MADE P regulatio n a s six month s after

th e widesprea

d availabilit y o f ultra-lo w sulfu r

fue l fo r purchase i n Massachusetts . Unles s these contingen t obligation s ar

e fulfilled , i t

wil l b e impossibl e fo r

regulate d facilitie s to mee t thi s fue l sulfu r

requirement . G E propose s tha

t th e languag e o f 31 0 CM R7.05(l)(a) 3 be change d a s follows : "O n an d after [si x month s after

effectiv e date ] n

o fue l supplie

r shal l offe r

fo r sale , fo r us e i n an y engin e rated a t apowe r output equa l to greate

r tha n 3 7 kW , o

r an y turbin e rate

d a t a powe r outpu t equa l t o les s tha

n 1 MW , an

y diese l fue l tha t fail s t o comply wit h th

e applicable U S EP

A sulfu r limit s pursuan

t to 40 CF R80... "

• Unde r 31 0 CM R7.02(2)(b)2 9 - "Exemption s fro mPla n Approval, " include i n thi s exemption , existin g engine s an d turbine s installe d prio r

to [si x month s o f

th e effectiv e dat e o f thi s subpart

] whic h hav

e aenerg y inpu t capacit y o f les s tha n 3 millio n Btu/hr . A s currently proposed , th

e ne w languag

e wil l n o longe r specificall y exemp

t these existin g smal l unit s fro mpla

n approval , makin g their

regulator y statu s i n th

e MADE P regulation s unclear . Moreover , 31 0 CM R7.0 0 Appendix C(5)(h ) currentl y allow s facilitie s t o propos e tha

t unit s exempte

d unde r 31 0 CM R7.02(2)(b)2 9 likewis e b e exempte d fro mth e requirements o f

31 0 CM R7.0

0 Appendi

x C(5)(b) . Wit h th

e propose d

iMr . Rober t T . Donaldson/MADE

P Jun e 30 , 200 4 Pag e 3 o f 3 change , th

e classificatio n o f

existin g engine s les s tha

n 3 MMBtu/h r

a s insignifican t source s i n Titl e V wil l als o b

e uncertain i f

MADE P elect

s t o incorporat

e these propose

d regulation s i n th

e stat e SIP . G E propose s tha

t th e followin g languag

e b e adde d t o th e proposed ne

w languag

e o f 31 0 CM R7.02(2)(b)29 : "an

d a n individua l interna

l combustio n engin

e suc h a s a combustion turbin e or

reciprocatin g engin

e havin g a

n energ y input capacit y o f les s tha n 3,000,00 0 BTU/hr installe d prio r

to [si x month s fro mth

e effectiv e date]... "

• A s agenera

l commen t o n these ne

w regulations , G

E believe s thes

e regulation s ca

n b e simplifie d by referrin g t o th e EP A standard

s unde r 40 CF R8 9 regulatin g th

e manufactur

e o f non-roa d engines . Th

e emission limitation s fo r engine s include d i n Tabl e 2 o f 31 0 CM R7.26(43)(b ) tha t diffe r fro mthos e i n 4 0 CF

R8 9 i s confusin g an

d might requir e manufacturer s to desig

n engine s specifi c t

o Massachusett

s requirements . Facilitie s woul d b

e a t th e merc y o f th e manufacturer s to suppl

y the mwit h engine s tha

t mee t Massachusett

s requirements . A t

aminimum , MADE P should consul t wit h engin

e manufacturers on thei r

abilit y to mee

t th e emission rate s i n Table 2 . I f yo u hav e an y question s regarding these comments , please cal l Amy Wong/GEAE , Ai r Program s Leade r a t 781-594-2382 . Sincerely , Joh n M . Craynon Plan t Manage r - Environmenta

l Healt h & Safet y c : Am y Wong/GEA

E