Document rp7Ov7Gxnap6jdEBv8k7p6zje

Ja n u a r y 20, 1956 D r , S, C, Sh ep ar d 314 U tica Squ are M ed ical Cen ter T u lsa i-i, O klah om a D e ar D octor Sh ep ard : i am air. dd th at n o r e fe r e n c e can b e m ad e to se r v e you r p u r p o se s in th e c a se in t u estio n . It is u n lik ely th at th e alle ge d so u r ce of exp o su r e, by it se lf, would cau se le ad p oison in g, but it is p o ssib le , th at it cou ld. It is a m a t t e r {}) o f th e t e m p e r a t u r e t o -which le a d o r an a llo y o f le a d -was h e a t e d , p lU 3 (2) th e am ou n t o f su r fa c e o xid at io n t h at o c c u r r e d fr o m t im e to t im e , an d ih<S d e g r e e o f c l e a n l i n e ss e m p lo y e d t o p r e v e n t t h e su sp e n sio n o f su c h o xid e in to the a ir , - e , th e total se v e r it y of th e e xp o su r e to lead com pou n ds an d (3) the d u r atio n of th e p e r io d o f e x p o su r e . Th e fa m ilia r eq u atio n o f d o 3e x t i m e 13 t h e r e a l i s s u e , an d t h is eq u at ion h a s t o be k n ow n t o b e a b le to sa y th at ad equ ate exp o su r e did o r did not e xist. if you know , by o b ser v atio n , th at the exp o su r e w as n egligib le, you can so t e st ify . If you do n ot know , you w ill h ave to h ave evid en ce, eith er in t e r m s of a ir an aly se s (or som e equ ivalen t type of in form ation as to the in ten sity of th e e xp o su r e ), o r in t e r m s of too sh o r t a p e r io d of e xp o su r e (d an gerou s ab so r p tio n fr o m th is so u r ce cou ld h ar d ly o ccu r in a few w e e k s). O th er w ise you m u st sh ow , by su it ab le a n a ly se s o f b lood an d u r in e (or both ) th at th e ab sorp tion of lead w as too little to be sign ifican t. My d isc u ssio n of th e so u r ce s of exp o su r e in the r efer en ce w ork In d u strial H ygien e an d T oxicology , Volum e II, p . 646 - In ter scien ce P u b lish e r s, In c ., New York - ed ited by F r an k A . P at ty , m ay be u se fu l to you , but it w ill n ot give youropin ion th e su p p or t it n ee d s. In cid e n t ally , th e r e a l q u e st io n in t h is c a se w ou ld se e m to b e "D id th e m an h ave le a d p o iso n in g ?M W hat abou t i t ? D id h e ? Do you h ave an aly t ic al eviden ce one w ay o r the oth er ? Sin cerely y o u r s, RAK ef Robert A . Kehoe, M. D. N 6314