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# OAR Box 1105 Prepped by Candice Davis



### Document

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# 113 ) ll-B-0 1 Docket Number: 

# A-79-3 3

Printed 4/14/2008 3:11:59 PM

Sheet 113 of 131P. 2 

## Collier , Shannon , Ril l & Scott , PLL C Attorneys-at-La w 305 0 KStreet , N.W . Suit e 40 0 Washington , D.C . 20007 Che t M . Thompso n (202 ) 342-881 5 Internet : cmt@colshan.co m Tel. : (202 ) 342-840 0 Fax : (202 ) 342-845 1 1 0 Barrac k Stree t Leve l 1 2 Sydney , NS W2000 , Australi a Tel. : 61-2-262-670 0 Fax : 61-2-262-326 3 (202)342-881 5 Octobe r 29 , 199 9 Mr . Kevi n Cavende r U.S . Environmenta l Protectio n Agenc y Metal s Grou p Emissio n Standard s Division (MD-13 ) Researc hTriangl e Park , NorthCarolin a2771 1

Re : NSP S Subpart s A A an d AA aCO M Requirement Dea r Kevin : Thi s i s i n respons e t o you r reques t las t monthfo r clarificatio n o n th e numbe r o f electri c ar c furnac e ("EAF" ) stee l facilitie s subjec t t o Ne w Sourc e Performanc e Standard s ("NSPS" ) subpart s A A an dAA aan dfor empirica l evidenc e o f

th e error-ban dprove n t o b e inheren t t o continuou s opacity monitor s ("COMs" ) —an error-ban dw e believ e render s COM s incapabl e o f accuratel y measurin g complianc e withth e NSPS ' stringen t thre e percen t

opacit y standard . I apologiz e for

th e delay i n respondin g t o you r reques t but i t too k m e som e tim e t o addres s ou r trad e association s an dt o locat e pertinen t data . Over th e summer , w e conducte da n informal surve y o f

Stee l Manufacturer s Associatio n ("SMA" ) an dSpecialty Stee l Industr y o f NorthAmeric a("SSINA" ) membe r companies . W e receive dresponse s from2 7 companie s representin g 3 5 different facilities . O f

those , 2 7 reporte d bein g subjec t

t o NSP S subpart

A A o r AA aan d1 2 reporte dusin g COMs . Frankly , I believ e ther e are man y mor e companie s usin g COM s tha n thos e that responded . Attache dfor

you r revie w are selecte dMetho d9 observatio n form s prepare db y certifie d smoke reader s at

SMI-Texas , a

n EA Ffacilit

y locate di n Seguin , Texas . SM I ha s apractic e o f conductin g Metho d9 reading s wheneve r it s CO M alarms . Th e attache dform s highligh t onl y afew ofth e man y instance s whe n SMI' s COM s indicate dopacity abov e thre e percent , but ye t Metho d9 reading s confirme dopacitie s o f zero . Not e that

o n som e day s th e CO M indicate dan exceedanc e for period s whe n th e furnac e wa s betwee n heats .P. 3 '""T j Collier , Shannon , Ril l & Scott , PLL C Mr . Kevi n Cavende r Octobe r 29,199 9 Pag e 2 I n th e nex t

fe w days , I wil l als o b e sendin g yo u dat afro mBayo u Steel . That dat awil l sho w instance s wher e th e CO M was alarmin g o n day s whe n it s furnac e was not eve n running . Th e dat a are bein g copie dan dsen t t o m e now , an dI wil l pas s i t alon g a s soo n a s I ge t

them . I hop e yo u fin dthi s informatio n helpful . W e are als o anxiousl y awaitin g th e opportunit y t o revie w th e draf

t amendmen t

languag e t o EPA' s Performanc e Specification s 1 . Le t m e kno w wha t els e w e can d o t o assis t

you . Sincerely , Che t M . Thompso n Counse l t o SM A an dSSIN A Enclosur e cc : Mr . Thoma s A . Danjczek , SM A Mr . Danie l F . Szwed , SSIN A