Document a1DDxr4R7598wNqE9jMV4L3RN

JLesdi FELIX EDGAR WORMSER,PRESIDENT K.C. BROWNELL,VICE PRESIDENT U. A . MARTINO, VICE PRESIDENT ROBERT LINDLEY ZIEGFELO. SECRETARY-TREASURER Assim siBt lcEiBi -4-20 LEXINGTON AVENUE NEWYORK17,K.Y. MA N F R E D BOWDI T C H DIRECTOR OF HEALTH AND SAFETY December 14, 1953 Robert A. Kehoe, M.D., Director Kettering Laboratory University of Cincinnati Eden Avenue Cincinnati IS, Ohio Dear Bob: - As is not unnatural, I find myself with some frequency a party to discussions on the subject of Threshold Values for lead and its compounds. The latest suggestion to come my way in this field is one to the effect that the time honored and all embracing 0.15 mg. per. cu. m, should be raised to 0.25 for lead fume and to 0.5 for such lead dusts as those from grinding ores, processing, etc. What do you think of that? ' I have long felt in a mild -way that- 0.15 was probably too Io'-j and in a far stronger way that it was pretty absurd to lug around such toxicallv disparate eggs as lead oxide and lead sulfide in the same hygienic basket. If, therefore, the matter of these values is to be opened, up, would it not be better to throw it wide open and do a thorough cleaning of the hen roost? And one more if. If this is to be cone, should it be left to that rather strangely constituted committee of the ACGIH or should there be a partial resurrection of the A S A 's more cumbersome but also more meticulous Z37 committee for the purpose? I frankly do not know too much about the present functioning of the ACGIH group, but I have heard enough criticism of their end results to be somewhat from Missouri. p . v n b T* 1 T7- MB: JG