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# OAR Box 1313 Prepped by LaTeia Shed



### Document

Number: 

# 32 ) ll-B- 6

Docket Number: 

# A-88-0 2

Printed 6/12/20089:03:28AM

Sheet 32 of 99P. 2

y s >:p!?%Yi tfii x 8 7 8 

# ® A-88-0 2 A-88-02 MIDWES T RESEARC H INSTITUT E '8*7 1 Dilf l 7\''* \ 450 5 Creedmoo rRoa

d Raleigh

. N.C

. 2761 2 Telephon e (919) 781-5750 

# FIL E COP Y

• # ^

Date : Apri l 22,^193 6

(Finalize d Ma y

9 , 1986 ) Subject : Sit e Visit—Saxoni a Frank e o f Americ a

Chromiu m Electroplatin g NESHA P EPA Contrac t 68-02-3817 ; ESE D Projec t 85/02 a MR I Projec t 7717- K 

# it/l j From : Rand

y Str a To : Al 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 sit e visi t wa s t o gathe r backgroun dinformatio n abou t th e chromiu

m electroplatin g operatio na t thi s plan t an d t o determin e th e suitabilit y

o f thi s plan t fo r chromiu m emission s testing . II . Plac e an

d Dat e Saxoni a Frank e o f Americ a Davi s Chape l Road Pos t Offic e Box354 2 Spartanburg , Sout hCarolin a 2930 4 (803 ) 579-396 6 Marc h13 , 198 6
III . Attendee s Saxoni a Frank e o f Americ a Rober t M . Kendrick , Vice-Presiden t
U . S . Environmenta l Protectio nAqenc y Al Vervaert , IS B Midwes t Researc hInstitut e Randy Strai t

/ Principa l Laboratorie s 425 Volke rBoulevard , Kansa s City

. Missour i 6411 CP. 3

IV . Discussio n
W e arrive da t th e plan t a t 10:0 0 a.m . Th e visi t consiste do f a discussio nabou t th e hardchromiu m platin g operatio nan dchromiu

m emission s captur e an

dcontro l equipment . Th e discussio nwa s followe db y a complet e tou r o f th e plant . A . Genera l Saxoni a Frank e o f Americ a i s a smal l captiv e sho ptha t manufacture s guides , sinkers , an

dothe r fla t part s fo r origina l equipmen t manufacturer s o f war pknittin g machines . Th e company als o manufacture s part s use di n fue l injectio nsystem s an delectri c fue l pump s fo r th e automotiv e industry . B . Proces s Th e plan t wa s performin g chromiu m platin g o f war pknittin g machin e guide s durin g ou r visit . Th e guide s rang e fro m 1 8 t o 2 1 millimeter s (mm ) (0.7 1 t o 0.8 3 inche s [in.] ) i nlengt han dar e les s tha n1 m

m (0.0 4 in. ) i n width . A

hol e i s stampe di non e en do f th e guides . Th e siz e o f th e hol e range s fro

m 0.4 3 t o 1. 8 m

m (0.0 2 t o 0.7 0 in. ) i ndiameter . Th e guide s ar e stampe dou t o f wire , tempere dwit hheat , an dtumbl e polished ; on e en di s the ncas t i na ba r o f solder . Th e solde r bar s ar e place d1 nplatin g rack s mad e o f polyviny l chlorid e an dplate dwit hchromiu m fro m 1 2 t o 2 0 minutes . Afte r bein g plated , th e guide s ar e rinse dwit hwater , remove d fro m th e solde r bars , tumble di nho t sawdus t t o remov e spots , an dtempere d wit hhea t t o remov e moistur e fro m unde r th e chromium-plate dsurface . Finally , on e en

do f eac hguid e i s plate dwit htin , an dth e guide s ar e inspecte dan

dpacke dfo r shipping . Th e plan t use s tw

o chromiu

m platin g tanks . Th e platin g solution s consis t o f chromi c aci d(Cr0 3 ) i na concentratio no f 3 0 ounce s pe r gallo n (oz/gal ) o f water . Sulfuri c aci d(H 2 S0 4 ) i s use da s a catalys t i na concentratio no f 0.1 8 t o 0.2 2 oz/gal . A brightene r manufacture db y M& T Chemical s (CR-842 ) als o i s adde dt o th e platin g solution . Tank 1 i s 21 3 centimeter s (cm ) (8 4 in. ) i nlength , 8 1 c m (3 2 in. ) i n width , an

d7 9 c m (3 1 in. ) i ndept han dcontain s abou t 28 0 gallon s (gal ) o f platin g solution . Tan k 2 i s 17 5 c m (6 9 in. ) i nlength , 6 9 c m (2 7 in. ) i n width , an

d7 6 c m (3 0 in. ) i ndept han dcontain s abou t 25 0 ga l o f platin g solution . Durin g ou r visit , Tank 1 wa s bein g operate da t 5 volt s (V ) an d 8,00 0 ampere s (amps ) an dTan k 2 a t 7. 5 V

an d6,00 0 amps . Th e operatin g temperatur e o f bot htank s i s abou t 50° C (120°F) . Th e chromiu m platin g facilit y i s operate d5. 5 day s pe r week , 8 hour s pe r day , an d5 0 week s pe r year . C . Emission s Contro l
A schemati c o f th e emission s contro l syste m fo r Tank s 1 an

d2 i s presente di nFigur e 1 . Uprigh t draf t hood s ar e installe do nth e bac k o f bot htank s t o captur e chromiu m emissions . Th e ventilatio nrat e o f th eP. 4

STAC K
LEGEN D AIRFLOW

Figur e 1 . Schemati c o f th e har dchromiu m platin g operatio na t Saxoni a Frank e o f America .P. 5

hood s i s 22 5 cubi c fee t pe r minut e pe r squar e foo t o f liqui d surfac e area . Emission s fro

m bot htank s ar e ducte dt o a closed-loo pfum e scrubbe r syste m tha t wa s manufacture dan dinstalle d i n198 5 b y KC H Services , Inc . Th e scrubbe r i s a singl e packed-be dhorizontal-flo w uni t (mode l No . H200 ) tha t i s locate do nth e roo f o f th e plant . Th e desig nga s flow rat e o f th e scrubbe r i s 6,30 8 actua l cubi c fee t pe r minute , an dth e waterflo w

rat e i s 1 8 gallon s pe r minute . Th e scrubbe r wate r flow s b y gravit y

fro m th e scrubbe r t o a tank insid e th e platin g facilit y an di s recirculate dt o was h dow nth e scrubbe r o na continuou s basis . Cit y wate r i s use dt o mak e u p evaporatio nlosse s fro m th e system . Th e scrubbe r i s washe ddow nwit h clea nwate r onc e ever y 3 months . D . Conclusion s Th e two chromiu

m platin g tank s a t thi s facilit y appea r t o hav e effectiv e emissio ncaptur e an dcontro l systems . Th e KC H scrubbe r use dt o contro l emission s a t thi s plan t coul db e a goo dcandidat e fo r testin g fo r th e followin g reasons : (1 ) th e uni t i s representativ e o f th e type s o f contro l equipmen t use dt o contro l chromiu m emission s fro

m hardchromiu

m platin g operations , (2 ) th e scrubbe r system ca nbe teste dt o determin e th e effec t o f recirculate dwate r o ncontro l devic e performance , an d(3 ) ther e appear s t o b e adequat e duc t lengt ha t th e inle t an doutle t o f th e scrubbe r fo r tes t ports . However , du e t o th e typ e an dmodes t amoun t o f wor k plated , th e amoun t o f wor k neede dt o complet e a tes t ru nma y b e unreasonabl y

long . Saxoni a Frank e personne l wer e very cooperativ e durin g th e visit , an

dth e informatio nprovide dwil l b e mos t usefu l t o th e chromiu m study .



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