Document 2qV4qG63EjzjDaz73o8ka0jYR

3' TETRA ETHYL LEAD PLANT Ju n e 9 , 1931 DR. W. . DEUEL: . A s e r ie s o f a ir sam ples r e c e n t ly ta ke n in 3 P la n t shows t h a t t h e le a d exposur e en coun ter ed , r em ains about th e same a s determ ined by th e p r e vio u s t e s t . There i s but l i t t l e exposure on t h e f i r s t flo o r ; t h e r e i s somewhat more on t h e fo u r t h and f i f t h flo o r s ; and the s t i l l flo o r , as u s u a l, co n s t it u t e s the gr e a te st h a za r d in t h e Main B u ild in g . A ve r y l i t t l e t e t r a e t h y l le a d d iffu s e s in t o t h e s m e lt e r by t h e s lu d ge p i t d o o r . The Allo y B u ild in g shows no p a r t ic u la r ch an ge from l a s t m onth. The h igh r e s u lt s o b t a in e d a t t h e Gr in d e r Pan in t h e Allo y were caused by an u n usu al co n d it io n which has been o b via t e d . A number o f b o le s had been bored in th e gr in d er stank in or d er t o o b t a in sam ples o f gr in d e r exh au st ga s e s . These h o le s were ade q u a te ly blocked w ith rubber stop p er s at the te r m in a tio n of the t e s t s on t h e m i l l , but in t im e th ey became u n p lu gge d , a llo w in g a la r g e amount o f a llo y d u st t o f l y in t o t h e room d u r in g g r in d in g . At Dr . Kehoe' s r e q u e s t , t h e a ir sam p les were t a k e n a t s e v e r a l le v e ls near th e s t a ck which is b e s id e th e gr in d e r p an . Un fo r t u n a t e l y , th e sam p lin g ap p a r a tu s was p la ce d clo s e to t h e s e h o le s and th e ve r y h igh r e s u lt s n oted were o b t a in e d . The s a m p lin gd e vice was r e moved b e fo r e t h e r e s u lt s were c a lc u la t e d and co n s e q u e n t ly in v e s t ig a t e d , so t h a t a s e r ie s o f ch eck sam ples w ith t h e h o le s s e cu r e ly p lu gge d cou ld not be ta ke n t h is month w ith ou t undue e ffo r t and lo s s o f t im e . However, t h e r e q u e s t o f Br . Kehoe w i ll be b or n e in m in d , and t h e n e xt sam ples taken a t t h e gr in d e r pan w ill be a t d iffe r e n t le v e ls . EWC/ lCR* J . L. STECHER, 8 UPT. K0 0 0 0 7 7 .t 6 N9515 ANALYTICAL DATA Pla ce He igh t fromt Flo o r Sm e lte r slu d ge p it door 5 ft . Allo y F ir s t flo o r #3H gr iftn d e r 5 it 5 Second Flo o r # 11 ?o t room # 12 # 13 * * # 11 " 11 * 12 .713 " " 73 gr in d e r can Co o le r 5 5 5 it tt 6 6 i nH. 6N 1 ft . 3 ft 4 ft 5 ft 6 ft 6 in . B Bu ild in g F ir s t Floor Air duct (by e le va t o r ) 6 In . ( Op p o s it e 11) 6 * * (Lew is Pump) 6 H 11 ( Op p o s it e Lew is Pumps) Lew is Pump #2 (t o p ) Ce n t r ifu g a l pump 6 b a 6 l w r Third Floor Air d u ct ( b e t . 1 -3 ) " ( 5-7) r- n ( 2-4) o ( 6 -S) O Fourth Floor 'K-U, #7 fr o n t ;fg #10 F ift h Floor 6 6h 6 tt 6 ft 6 6 6 ft it it 6 it n Time o f Hun 24 h r s . 24 .It & 24 24 If 24 it 24 Si 24 it 24 i 24 a 24 ft 24 >t 24 si 24 24 24 24 ft ti 24 ft 24 tt 24 )i 24 i 24 24 ft 24 ft 24 ft 24 ti 24 if 24 it 24 ft Pb a s Mg/ cu .0 0 5 9 .0 0 5 9 Kg .0 0 19 Bg .0 059 m .0 0 1 9 .0 0 0 4 . 09S .250 .0 0 5 9 Kg .0 0 1 9 Kg , .0 0 0 4 Kg .0 0 19 Mg .0 0 4 0 .0 059 .0 0 5 9 .0 0 19 .0 0 19 Nng .0 0 0 4 N9515.01