Document vB70R8KEZzEE3D9oOe8zkNXM8

JL I I .D * Jl ooar i c any FIRST IN RUBBER SI N CE 187 0 OVER 32,000 RUBBER PRODUCTS A KRO N OHIO Sep tem b er 2 6 , 1947 \ D r . R o b e r t A. Kehoe Ketterin g Laboratory U n iversity o f C in cin n ati C in c in n a t i, Ohio Dear D r. Keh oe* I sh a ll attem pt t o su pply you w ith the in form ation t h a t you r e q u est ed in y ou r l e t t e r o f Sep tem b er 9 t h . , r e l a t i v e t o ou r le a d em ployees wh ose u r in e and blood you r e c e n t ly exam in ed. Th ese in d iv id u a ls ar e a l l em ployees of a departm en t in w h ich m etallic le ad i s u sed fo r th e cu r in g of v a r io u s t y p e s of ru bber h o se . In b r i e f th e p ro cess in volves c a st in g th e m etal in to 1000 lb . in go t s, extru d in g th ese in go t s un der h ydraulic p r e ssu r e aroun d th e h ose to be cu r e d , m ech an ically st r i p p i n g t h e se le a d ja c k e t s fr om t h e h o se fo llo w in g t h e c u r in g , and r e m e lt in g th e u sed le a d f o r new i n g o t s , The c a st i n g room i s a d jo in in g b u t se p a r a t e d from t h e o t h e r p a r t s o f t h e p r o c e s s . The at m o sp h e r ic e xp o su r e i s h ig h e st in t h e c a st i n g room . The fo llo w in g v a lu e s fo r at m o sp h e r ic le a d con ten t w ill in d ic a t e t o you th e r e la t iv e degree o f exposu re a t th e v a r io u s op eration s: Range o f C o n ce n t r at io n (m gs. le ad p er cu b ic m eter o f a i r ) .49 - 2 .7 7.0 - 8.5 .11 - .82 .05 - 1.3 . O peration Castin g room. O perators exposu re durin g d r o ss rem oval. Gen eral workroom n ear e x t r u sio n p resses. Area around st r ip p in g m ach in e. M ech an ical v e n t ila t io n i s u sed in t h e c a st in g room^but as th e above r e su lt s w ill in d icate^ d oes n ot a t the p resen t tim e ad equ ately con tr ol the h azard. R o t at io n o f c a st in g room em ployees from t h i s a r e a t o any of the oth er o p e r a t io n s i s m ad e ,at fo u r month i n t e r v a l s . The w or k er s in t h e c a st i n g room a t th e tim e th e specim en s w ere c o lle c t e d were th e fo llo w in g! Rodatt Hopp H oledor F e ssle r ,,