Document k6E27VKL8bjamvO4ZV03YO90y

May 1 5 , I 94-O D r . Graham Ed gar Eth y l G asolin e Corporation Ch rysler Bu ild in g New Y0r k C it y New York Dear Graham: We a r e now m ak in g p r e p a r a t i o n s fo r th e stu dy o f th e le a d in th e st r e e t d u st s and in v a r io u s p a r t s o f th e atm osph ere o f C in c in n a t i, a s a p r e lim in a r y to th e st u d y o f o t h e r c i t i e s . Our p r e se n t p la n s a r e r a t h e r com p r eh en sive in n a t u r e an d we e x p e c t t o u se ' C in c in n a t i a s a p r o v in g gr ou n d f o r t h e w ork. We s h a l l p r o b a b ly c a r r y o u t some l a b o r a t o r y o b se r v a t i o n s in o r d e r to se t t le ce r tain qu estion s th at are n ot e n t ir e ly cle ar , but our f i r s t ob servation s w ill c o n sist of a se r ie s of sam ples o b tain ed by e l e c t r o - st a t ic means a t a co n sid e r ab le number o f sp o t s in C in c in n a t i. W ith t h e se d a t a a t h an d , we s h a l l be a b le t o p la n fu r t h e r o b se r v a t i o n s. I t i s n o t our p lan to p roceed r a p id ly , bu t r a t h e r c a r e fu lly , and I a n t i c i p a t e t h a t we w i l l p r o b a b ly sp e n d t h e g r e a t e r p o r t io n o f th e year a t our o b se r v at io n s in C in cin n ati and our lab or ator y experim en tation . I sh a ll keep you acqu ain ted w ith our p r o gr e ss as tim e goes on , b u t do n ot exp ect an yth in g very dram atic in the n ear fu t u r e . My p r e se n t l e t t e r co n ce r n s i t s e l f w ith our n eed fo r a v a ila b le d a t a on th e com p osit ion o f exh au st gas w ith r e sp e c t to th e end p r od u cts o f th e com bu stion o f Eth y l F lu id . Se v e r a l q u e st io n s p r e se n t th em se lv es t o u s w h ich h ave p r o b ab ly been an sw ered by v a r i o u s t y p e s o f i n v e s t i g a t i o n . F i r s t , we n eed t o know w h eth er t h e r e a r e an y c o n d it io n s un der which un ch an ged t e t r a e t h y l l e a d can e sc a p e in t h e e x h a u st g a s . Secon d we n eed t o know th e c o m p o sit io n , p a r t i c l e s i z e an d v a r io u s o th er ch em ical and p h y sic a l p r o p e r t ie s o f th e le a d compounds whicli ocon r in th e e xh au st g a s, which ar e d e p o sit e d in th e m otor and in th e exh au st sy stem . I t would p r o b ab ly a lso be u s e f u l f o r u s t o know a s much a s p o s s i b l e ab o u t th e v a r ia b il it y o f th e c o n ce n t r at io n s o f h ydrobpom ic a c id a s we LI'. a s car b o n m on oxid e, car p o h d io x id e e t c . Not t o go in t o fu r t h e r d e t a i l , what i s r e a l l y r e q u ir e d i s a l l o f th e p o t e n t ia lly u se fu l a v a ila b le : d a t a from an y sou r ce b u t c h ie fly u n p u b lish ed d at a which ar e in th e h an ds o f the te ch n ical s t a f f o f Eth yl G asolin e Corporation . 1 am more' o r l e s s f a m i l i a r w it h some o f th e f a c t s ou t i t seem s w ise t o g e t t o g e t h e r a l l o f th e a v a i l a b l e d a t a an d t o make a v e r y c a r e f u l st u d y o f t h e f a c t s a s t h e y a r e now known b e fo r e d e v i si n g fu r t h e r exp er im en t a t io n . I r e a liz e t h a t you do n ot h ave a l l o f t h is in fo r m a t io n in you r own h a n d s, b u t you p r o b a b ly know mors abou t m e r e i t can be ob tain ed th an does anyone ej.se in the C o r p o r at io n . I would a p p r e c ia t e i t ver y much i f you w ould t a k e su ch s t e p s a s a r e co n v e n ie n t t o se e t h a t I am su p p li e d w it h t h i s in fo r m a t io n . I sh a ll a lso be very g r a t e fu l i f you or C al, or any o f t h e o t h e r t e c h n ic a l men, w ould make su ch su g g e st io n s a s seem fe a .sib l e f o r t h e i d e n t i f i c a t i o n o f t h e le a d w hich i s d e r iv e d from e xh au st g a s. W ith my t h an k s i n ad van ce fo r you r h elp and w ith k in d e st p e r so n a l r e g a r d s, I am ' Sin cerely you rs, RAKt ls R o b e r t A. Keh oe, M.D