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# OAR Box 

# 1814 Prepped by Ollie Stewart



### Document

Number: 

# 36 ) ll-B-1 4

Docket Number: 

# A-88-0 2

Printed 11/7/2008 7:22:07

AM Sheet 36 of 63P. 2

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## A-88-02

MIDWES T RESEARC H INSTITUT i

450 5 Creedmoo rRo « Raleig h N C Telephon e (919 ) 781-57 *

Date : Octobe r 31 , 198 6

(Finalize d Decembe r 1 , 1986 ) Subject : Sit e Visit—Chrom e Craf t Corporatio n

Chromiu m Electroplatin g NESHA P EP A Contrac t 68-02-3817 ; ESE D Projec t 85/02 1 MR I Projec t 7717- K /•*• »

From :
To : Randy

Strait ^

A l Vervaer t ESED/ISB/SS S (MD-13 ) U . S . Environmenta l Protectio nAgenc y Researc hTriangl e Park , N.C . 2771 1

I . Purpos e Th e purpos e o f thi s visi t wa s t o determin e th e suitabilit y o f th e plan t fo r chromiu

m emission s testin g t o asses s th e effectivenes s o f a fume suppressan t t o inhibi t mistin g fro m a decorativ e chromiu m platin g tank . II . Plac e an

d Dat e Chrom e Craf t Corporatio n 31 8 Midlan d Highlan d Park , Michiga n4820 3 (313 ) 868-244 4 Septembe r 5 , 198 6

III . Attendee s Chrom e Craf t Corporatio n Richar d Barnet t Wayn e Reddekop p
U . S . Environmenta l Protectio nAgenc y (EPA )

A l Vervaert , IS B Midwes t Researc hInstitut e Randy Strai t

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IV . Discussio n W e arrive da t th e plan t a t 9:3 0 a.m . Th e visi t consiste do f a discussio nabou t th e decorativ e chromiu m platin g operation s a t th e plan t an dpossibl e emissio ntestin g t o asses s th e effectivenes s o f a fume suppressan t use dt o contro l mistin g fro m a decorativ e chromiu

m platin g bath . Th e discussio nwa s followe db y a tou r o f th e platin g shop . P. 3

A . Genera l Chrome Craf t Corporatio ni s a jobsho ptha t perform s decorativ e chromiu m platin g o f truc k bumpers . Th e plan t operate s tw o decorativ e chromiu m platin g line s 1 6 hour s pe r day , 5 day s pe r week , an d5 0 week s pe r year . Bot hline s ar e equippe dwit hhoist s tha t ar e use dt o transfe r eac h rac k o f bumper s throug ha serie s o f tanks . Th e company woul dallow testin g t o b e performe donl y o nth e chromiu

m platin g tank o nlin e No . 1 . Therefore , th e followin g proces s informatio nwa s obtaine dprimaril y fo r platin g Un e No . 1 . B . Proces s Informatio n Platin g lin e No . 1 include s th e followin g operation s insequence : 1 . Degreasin g an

dcleanin g (severa l tanks) ; 2 . Semibrigh t nicke l platin g (1 6 bays) ; 3 . Brigh t nicke l platin g (severa l tanks) ; 4 . Rins e wit h3 9 gram s pe r lite r (g/n ) ( 5 ounce s pe r gallo n [oz/gal] ) o f chromi c aci d( 3 tanks) ; 5 . Chromiu

m platin g ( 1 tank) ; 6 . Drai n( 1 tank) ; an d 7 . Wate r rins e ( 3 tanks) . Th e chromiu

m platin g tank i s 2. 4 meter s (m ) ( 8 fee t [ft] ) long , 1. 8 m ( 6 ft ) wide , an

d1. 8 m ( 6 ft ) dee pan

dcontain s abou t 7,57 0 liter s (i)

(2,00 0 gallon s [gal] ) o f platin g solution . On e rac k o f bumper s i s plate da t a time o non e sid e o f th e tank whil e th e othe r sid e o f th e tank i s ai r agitated . Eac hrac k hold s 5 bumpers , an d1 4 rack s ar e plate dpe r hour . Eac hplatin g cycl e take s 4 minute s (min ) an d1 0 seconds , an deac hrac k 1 s chromiu m plate dfo r 2. 5 min . Th e norma l operatin g voltag e an

dcurren t ar e 9 volt s an d6,00 0 amperes , respectively . Th e chromiu

m platin g bat hcontain s chromi c aci dina concentratio n o f 30 0 g/ a (4 0 oz/gal ) an da sulfuri c ad d catalys t i na concentratio no f 1. 6 g/ n(0.2 2 oz/gal ) o f platin g solution . Th e norma l operatin g temperatur e o f th e solutio nrange s fro m 43 ° t o 46° C (110 ° t o 114°F) . Th e chromiu

m platin g tank o nlin e No . 2 1 s 1. 5 m ( 5 ft ) long , 1. 5 ( 5 ft ) wide , an

d2. 4 m ( 8 ft ) dee pan

dcontain s abou t 3,78 5 i (1,00 0 gal ) o f platin g solution . On e rac k i s plate da t a time . Eac hrac k hold s 4 bumpers , an

d1 0 rack s ar e plate dpe r hour . Eac hplatin g cycl e take s abou t 6 min , an

deac hrac k o f bumper s i s chromiu m plate dfo r 3 m1n . Th e norma l operatin g voltag e an dcurren t ar e 8 volt s an d5,00 0 amperes ,P. 4

respectively . Th e platin g solutio ni s supplie db y UDYLITE ®an

dcontain s chromi c ad di na concentratio no f 30 0 g/s , (4 0 oz/gal ) an da fluorid e catalyst . C . Emissio nContro l Th e chromiu

m platin g tan k o nlin e No . 1 i s controlle db y a fume suppressan t supplie db y UDYLITE ®(ZERO-MIST ®HT) , tha t form s a foa m blanke t ove r th e platin g solutio nt o reduc e chromi c aci dmisting . Th e tank i s equippe dwit hdouble-side ddraf t hoods . Eac hhoo di s vente dt o a separat e scrubbe r manufacture db y Niehau s Brothers , Inc . Th e ga s flow rat e t o eac hscrubbe r i s abou t 39 6 cubi c meter s pe r minut e (14,00 0 cubi c fee t pe r minute) . Th e chromiu

m platin g tank o nlin e No . 2 i s equippe dwit ha single side ddraf t hood , tha t als o i s vente dt o a scrubbe r manufacture db y Niehau s Brothers , Inc . D . Conclusion s Chrom e Craf t Corporatio ni s a jo bsho ptha t perform s decorativ e chromiu m platin g o f bumpers . Emission s fro m th e chromiu

m platin g tank o n U n e No . 1 ar e controlle db y a fum e suppressan t an dtwo scrubbers . Ther e wer e n o visibl e emission s fro m th e chromiu

m platin g tan k durin g th e visit . Emissio ntestin g coul db e performe da t thi s plant ; however , 1 t i s a margina l candidat e fo r th e followin g reasons : 1 . Th e scrubbe r outle t i s locate dinsid e th e platin g shop . Ther e i s some concer ntha t th e scrubbe r woul dno t contro l chromiu m emission s adequatel y

durin g th e uncontrolle demissio ntes t t o mee t th e Occupationa l Safet y an dHealt hAdministratio nstandard s fo r chromiu m concentration s i n th e roo m air . 2 . T o obtai nuncontrolle demissio ndata , th e existin g platin g solutio nwoul dhav e t o b e draine dt o a holdin g tank supplie db y EPA becaus e th e fume suppressan t canno t b e depleted . Th e uncontrolle dtes t woul dhav e t o b e performe do nnew platin g solutio nmad e upb y plan t personnel . 3 . Eac hhoo do nth e tan k i s vente dt o a separat e scrubber . Plan t personne l state dtha t th e scrubbe r controllin g mis t fro m th e sid e o f th e tank tha t i s ai r agitate dcoul db e turne dof f durin g th e test . Th e hoo d o nth e othe r sid e o f th e tan k wher e platin g 1 s performe dshoul dprovid e adequat e ventilatio ndurin g th e test . However , befor e testin g i s performed , th e actua l ga s flow rat e o f th e scrubbe r shoul db e measure dt o determin e i f th e ventilatio nrat e o f th e hoo d1 s adequate . Ther e i s abou t 1. 5 m ( 5 ft ) o f straigh t ductwor k leadin g t o th e inle t o f th e scrubbe r tha t woul dprovid e a nadequat e locatio nfo r a tes t port . Availabl e spac e a t thi s location , however , i s somewha t limited .



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### Chrom e Craf t personne l wer e ver y cooperativ e durin g th e visit , an d th e informatio nprovide dwil l b e mos t usefu l t o th e chromiu m study .



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