Document 9Lmdm9eLJvGYpBBwyJnvwLDyL

EGISTEREO P R OFE SSION AL ENGINEER Mel v in w . Fir st , 5 c . D CO N SU LT I N G a n d R ESEA R CH EN G I N EER 295 Up l a n d a v e n u e New t o n H i g h l a n d s , Ma s s a c h u s e t t s 02161 (617) 332-3B77 25 June 1968 D r . R o b e r t A. Xa h o e P r ofessor em eritus of Occu p ation al Medicine U n iversity of Cin cin n ati Ketterin g Laboratory Ad en en d B e t h e s d a Ave n u e s C i n c i n n a t i , O h io Age 19 Leer Dr . Keh oe: Thank you fo r you r k in d and in fo r m a t ive l e t t e r r e l a t i v e t o t h e cu r r e n t s i t u a t i o n i n " O' B u i l d i n g c f E t h y l C o r p o r a t i o n ' s Ba t o n Bo u ge P l a n t . I vvas p l e a s e d t o l e a r n t h a t t h e y a r e c o n t i n u i n g w i t h t h e a l t e r a t i o n s t o t h e v e n t i l a t i o n system a s I h a d n 't h e a r d fr om them fo r s e v e r a l months and was cu r io u s abou t t h e ir p r o gr e s s . I q u it s a gr ee th a t Park and J ones are' ver y com petent and w e ll m o t i v a t e d t o w a r d t h e o b j e c t i v e s w h i c h we h o l d i n com m on . Me h a v e h igh h on es t h a t t h e e n gin e e r in g m o d ific a t io n s now u n d erway w i l l p r o d u c e s i g n i f i c a n t l o w e r i n g o f t h e l e a d c o n t e n t o f B u i l d i n g " C" a i r . I t would be o f in t e r e s t to ob t a in p er so n a l sam p les, as w e ll as a r ea sam p les, b e fo r e and a ft e r , to e va lu a t e exp osu r es and im provem ents more p r e c i s e ly . "Best'wish es / / Uuv yiin i t ' / M e l v i n W. F i r s t g g 0015518 N19583