1H00 2 :>.)f i Uaku rA V t r l u . ConctiriJ , Mastachusiitt ; 017 4 = Februar y 20 , 200 4

Ms . Kare n Rega s Massachusett

s Departmen

t o f Environmenta

l Regulatio

n Burea u o f Wast e Preventio

n 8 t hFloo r 1 Winte r Street

Boston , M A 0210

8 Subject ; Comment

s on the Propose

d Amendment

s to Massachusett

s DE P Regulation s 7.0 0 Dea r Karen : Thi s lette r provides severa

l comment

s o n th e Department' s propose

d change s to 31 0 CM

R 7.00 . I n general , th

e clarification s bein

g mad e t o thes e regulations ar

e welcom e modifications . 1

- 702f2Vf

) - Exemptions for

Exclusions tha

t Contraven

e a n Existing Pla

n Approval : 7.02(2)(f ) includes ne

w languag e tha t specifie s tha

t actions tha

t would'contraven

e existin g "monitoring , recordkeeping , testin g o r reportin g requirements " requir

e aPla n Approval . Thi s wording seem

s t o b e to o restrictive ; i t

i s suggeste

d tha t th e Departmen

t could ad d a qualifie r her e to indicat

e tha t "substantiv

e relaxation s o f

existing monitoring , recordkeeping , testin

g o r reportin g requirement

s requir e aPla n Approval . Thi s would allow monitorin

g flexibilit y provision s t

o b e adde d withou t th e unnecessar

y burde n o f undergoin g th e Pla n Approva

l process . Telephon e 9 7 K , 3 7 1. 4 A n o F ; i < • N i rr \i 1 e 978.3 7 i .2^6 8

2 . 7.02f4Va

i an d (b ) Limite dPla

n Approva

l (L?A > Applicabilit

y fo r Fue l Utilizatio n Facilitie s Th e descriptio

n o f th e calculatio

n procedur

e fo r LP A potentia l emission s unde r 7.02(4)(b) propose s t o strik e th e sentence : Th

e calculation can-conside

r propose d limitation s or restriction s on operatin

g rat e or shor t and long ter

memissions , provide d tha t thes e condition s becom

e federall y enforceabl

e upo n plan approval . Thi s raises severa l question s concernin

g th e ne w LP A program . I f

suc h operatin g rate restriction s ar

e propose d i n th e LP A Application , ar

e suc h restriction s stil l adequat

e to maintai

n potentia l emission s < 5 tp y fo r

LP A applicability ? Also , wit

h respec t t o 7.02(4X3X4) , ar

e LP A restriction s (still ) considere d federall y enforceabl

e fo r propose s o f determinin

g th e nonapplicabilit

y o f PS D and/o r Non-Attainmen

t NSR ? I f a n LP A i s presumptivel

y approved

, doe s thi s impac

t th e federa l enforceabilit

y o f suc h operatin g limitations ? 3 . 7.02(8X

0 an d (b ) Emergenc

y o r Standb y Engine s Th e siz e restriction "bu

t less tha n 10,000,00

0 Bt u pe r hour " i s propose

d t o b e stricke n fro m7.02(8Xi) , bu

t thi s requiremen

t appear s t o b e retaine d i n 7,03(10) . Di dth

e Departmen

t inten d to leav e th e 10,000,00

0 Btu/h r uppe r limi t in 7.03(10

) bu t strik e i t fro m 7.02(8)(0 ?

A Tyco mfrasvucture

Services

Company02/20/0 4 FRI 17:2 6 FA X 50 8 37 1 246 8 EART H TEC H 12100 3 Ms . Kare n Rega s Pag e 2 Februar y 20,2004 4 . 31 0 CM

R7.06(1 ) Opacit

y Regulations : Thes e rule change

s see mt o b e a n opportun e tim e t o consolidat

e 7.06(l)(a) an

d (l)(b ) int

o asingl e consisten

t requirement . Th

e distinction betwee

n "smoke " (a

s regulate d unde r (IXa) ) an d "opacity " (a

s regulate d unde r (1Kb) ) ha s neve r bee n particularl

y clear . Th

e definition s unde

r 31 0 CM R7.0 0 sugges t smok e i s an y visibl e aeroso

l (othe r ma n water ) tha t result s fro mcombustion . However , 1 hav e hear d representative

s o f th e Departmen

t indicat e tha t "smoke " unde

r ( 1 )(a ) i s reall y only "blac

k smoke. " Th

e referenc e to th e Ringleman n Char t appear s t o b e aholdove

r fromolde r regulator y programs . Exclusiv

e us e o f opacit y rathe r tha n "th e Chart " wouldb

e consisten

t wit h bot h Federa l COM S performanc

e specifications , an

d references t o visibl e emissio n test s usin g EP A Metho d 9 . Also , ther e ar e othe r difference s i

n (l)(a ) an d (l)(b ) tha

t wouldb e eliminate

d i f (l)(a ) an d (lXb ) ar e consolidated . 7.06( 1 Xa

) allow s u p t o 6 minutes pe

r hou r a t o r abov e "No . 1 o f th e Chart " (2

0 % opacity) , whil e 7.06( 1 Xb ) allow s onl y u p to 2 minutes pe

r hou r abov e 20 % opacity . I t

woul dsee maconsisten

t 6 minutes wouldb

e mor e appropriat

e i n eac h case. Also , unde

r th e curren t rule , tim e a t exactl y 20 % opacit y (suc h a s ma y occu r wit h Metho d 9 ) woul dcoun

t agains t th e 6 minut e limi t fo r 7.06(l)(a) bu

t no t fo r th e 2 minut e limi t unde r (l)(b) . I t i s suggeste

d th e Departmen

t conside r adoptin g a n opacit y complianc e approac h usin g 6-minut e bloc k averages , an

d no t definin g a

n exceedanc

e unles s th e opacit y exceed s 20% . Thi s wouldb

e consisten

t wit h th e Federa l Ne w Sourc e Performanc

e Standard

s fo r Fossil-Fue

l Stea mGeneratio

n Units . Unde

r thi s approach

, n o perso n woul db e permitte d greate r tha n 20% opacity , excep

t tha t on e 6-minut e perio d n o greate r tha n 40 % opacit

y pe r hou r woul db e allowed . Th e ne w opacit y provision unde

r 7.06( 1 )(c ) ha

s o f cours e bee n debate d an d discusse d i n detail . Th e onl y suggestio

n begi n mad e her e i s tha t th e preparatio

n o f aPla n o f Goo d Operatin g Practices doe

s no t see mwarrante

d fo r source s which ca n mee t th e 15%/27?/ 0 limit s a s specified i n 7.06(c)(1) . 5 . 7.54 : Ne

w Larg e Combustio

n Emissio n Uni t Rul e 7.54(2)(a ) an d (b) : Th e definitio n o f

a"Larg e Combustio

n Emissio n Uni t (LCEU) " shoul

d clarif y whethe r aCombine

d Cycl e turbin e configuration fall s withi n th e definitio n o f "indirect hea t exchanger" . 7.54(2Xj) : I t

i s no t clea r wh y onl y electric utility stea

mgeneratin

g units ar e abl e to us e "representativ

e actua l annua l emissions " occurrin

g afte r implementatio

n o f th e change . I t i s suggeste

d tha t thi s provision s b

e extende d t o al l LCEUs . Than k yo u fo r th e opportunit

y t o provid e thes e comments . Sincerely : S*>rge# . Lipka^P.E . EART H TEC H A Tyco infrastructure Services Company