Document wgDNL5rNB75Nwd4o8zkY8rYK6

Br John E. Wright, Standard Oil Development Company, P. 0* Box 243, Elizabeth B, Hev Jersey. ' Dear Doctor Wright t I am sending y o t ^ f o r the collection of samples of blood and urine from referred to in your letter of May 9, since it appears t h a t ^ S S r ^ u ^ o m e question in your mind concerning the potential exposure to lead on the part of this man'in the course of his vork. . .* . May I say, in all personal and professional courtesy, that you do not, it seems, have quite the correct idea as to the role of such analyses! Our purpose is that of measuring the extent of the lead absorption as a means of m easuring any risk that may be attached to the occupation. If Mr. M f l & L s taking proper precautions, he should have no exposure to lead"in his vork. If there Is any doubt on this score, it is neces sary that his manner of vorking be investigated, criticized and corrected. With respect to the potential absorption of tetraethyl lead, as differ entiated from that of inorganic lead compounds, there are no blood changes of any kind that have any relevance. Wo such changes occur even in fatal tetraethyl lead intoxication. Your finding of an apparent leucopoenia suggests the possibility of exposure to benzene (C-Ha ;, and if I vere responsible for this man, I should look into that possi bility with great care. . Cordially yours, RAK ef Robert a . Kehoe, M. >.