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# OAR Box 

# 1814 Prepped by Ollie Stewart



### Document

Number: 

# 60 ) ll-B-3 8
Docket Number: 

# A-88-0 2

Printed 11/7/20087:22:08AM

Sheet 60of 63P. 2

sr 4 , 

## A-88-0 2

UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y Offic e of Ai rQualit yPlannin g an d Standard s Researc h Triangl e Park , Nort h Carolin a 2771 1

1 9 MA Y 198 8 

# rj

' * t^y *-|* f

MEMORANDUM
SUBJECT : Tri p Repor t - Collectio no f Chromiu m Sample s fro

m a Decorativ e Chrom e Platin g Plan t
FROM : J.W . Brown , Tes t Suppor t Sectio n

Emissio nMeasuremen t Branch , TS D (MD-19 ) TO : R.T . Shigehara , Chief , Tes t Suppor t Sectio n

Emissio nMeasuremen t Branch , TS D (MD-19 ) 

# 5 1

Plac e an d Date : Automati c Di e Castin g

Harpe rStree t St

. Clair e Shores , Michiga n

Participants :

Discussion : Apri l 16-28 , 198 8

Automati c Di e Castin g

Pee rAssociate s - Fre d Taf t Scot t Verhell e

- Do n Duva l 1 Eri c Hollan d Hele n Owens And yWisema n Pacifi c Environmenta l Service s - Ji m Bla u
MR I - Robi nBarke r Chrom e Tec h- Larr y Zitk o Environmenta l Protectio nAgenc y - Joh nBrown Fran k Clay

Tes t personne l travele d t o St

. Clair e Shore s o n th e weeken d s o tha t samplin g coul d star t o n Monday , Apri l 18th

.

/

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A tota l o f 1 4 chromiu m screenin g tes t run s wer e mad e wit hqua dnozzle s enablin g collectio no f fou r sample s pe r test . Th e chromium screenin g sample s wer e collecte d eithe r simultaneousl y o r overlappin g wit hth e referenc e Modifie d Metho d 13 B samples . Al l tes t sample s wer e collecte da t th e inle t t o a scrubbe r contro l device . Ther e wa s n o pla nt o collec t sample s fro

m th e scrubbe r outle t becaus e a principa l objectiv e o f thi s fiel d tes t wa s t o evaluat e th e emissio nreductio neffectivenes s o f fume suppressant s and surfac e tensio nadditive s o nth e platin g tan k solutio n surface . Analysi s fo r CR + 6 wa s conducte do nsit e fo r bot hreferenc e an d screenin g sample s b

y photometr y

o na Spe c 2 0 analyzer . A stalagtomete r wa s se t u p fo r measuremen t o f th e platin g bat hsurfac e tensions . Th e firs t se t o f run s wa s complete donMonday . Th e secon dtw o sets , withou t platin g tan k emissio ncontrol , wer e mad e o nTuesday . Th e thir d chromiu m screenin g tes t ru

nwa s traverse d t o chec k fo r uneve ndistributio n i nth e duct . A

compariso no f result s indicate dtha t representativ e samplin g coul d b e achieve d withou t traversing . Tw o set s o f run s wit hfume suppressan t contro l wer e complete do n Wednesday . On e o f thes e screenin g test s include dsingl e poin t samplin g a t th e lowes t poin t onth e vertica l axi s t o chec k fo r possibl e stratificatio ni nth e horizonta l duct . Tes t result s indicate dtha t n o significan t stratificatio nwa s present . Sampl e catc honth e firs t run , usin g fum

e suppressant , wa s quit e smal l s o samplin g tim e wa s extende dfo r al l subsequen t tests . Cleaned , use dTeflo nnozzle s wer e use dfo r th e fift hchromiu

m screenin g test . N

o desirabl e sampl e bia s wa s indicate db y tes t results . Th e las t se t o f runs , wit hth e firs t platin g bat hsuppressant , wa s complete d onThursday . A nextr a chromiu

m screenin g tes t usin g polyethylen e nozzle s wa s run . Th e plan t shu t dow nplatin g operation s o n Frida y s o n o furthe r testin g coul d b e don e unti l productio nresume do nth e followin g Monday . Slo w depletio no f th e firs t foa m suppressan t delaye dcollectio no f sample s onApri l 25th . Th e sevent hchromiu m screenin g ru

nwa s extende dt o 6 hour s t o increas e catc hquantity . Th e individua l sample s o f Ru n7 wer e spli t fo r analysis , tw o wer e analyze d immediately , an dtwo wer e teste d afte r standin g overnight . Tes t result s confirme dth e expecte dstability . Th e las t tw o set s o f sample s wer e collecte d o nTuesday . Th e chromiu m screenin g run s wer e conducte dfo r 4 hour s each . Two extr a washe s wer e recovere d fo r analysi s onth e las t run , on e from th e tubin g connector , an d on e fro m th e lon g Tygo nsampl e line . A post-tes t lea k chec k an d calibratio nchec k wa s performed .

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Conclusion s an

d Recommendations : Th e screenin g sampl e result s wer e good i nterm s o f reproducibility , eve nat th e very

lo w concentration s encountere dwit hhig hefficienc y platin g bat hcontrol . Accurac y wa s onl y

margina l compare dt o th e referenc e tes t results . Th e screenin g sample s wer e abou t 2 5 percen t lowe r tha nth e referenc e samples .
cc : Da nBivin s (MD-14 ) Frank Butle r (MD-77A ) Frank Cla y

(MD-14 ) .^Cl Vervaer t (MD-13 ) Georg e Wals h(MD-14 )



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