Document Exa6Rx2Eexj73V6wxxXa1nVJg

March 29, 1941 Dr. Rw J - Hess 354 Metropolitan Building Denver, Colorado Dear leek: the analytical findings on the samples of blood end urine 3ent ua on March 21, 1941 were ea follows: trine - 0 .25 Kgs. Pb per liter M o o d - G.QS5 mgs. ?b per 100 gms. M z lead excretions are dropping off nicely and should reach normal in a few weeks. Pros this joint o n it might be a good idea to take the samples once a week, rather than at twoweek Intervals. Ste urine sample on S R p H P l s relatively low (#.10 mgs. Pb per liter) compared with hi3 previous figure and is consistent with his having had a brief severe exposure in the day preceding the first sample that X took. On the basis of this ssslytleal result, there would not appear to be say cause for concern at present. note that our needle was not returned with the fe&es of blood. If you will send It baok to U3, w will d e a n it up and forward it in time for yea to take another sample Ov/ing to the problem of contamination, it ia our policy to clean these needles here at the laboratory after every use . received a letter from Dr. Neal of the United States Public Health Service last v?eek in which 1 mentioned that he had not yet beard from the B&Llo Health people or the Industrial Commission in Colorado concerning the proposed code for lead plants. If you have opportunity to phone or meet R 0021297 Dr. H. T. Hess - {2} - March 29, 19^1 either B. Y. Howe or Kelly of the Factory Inspection Division, I would appreciate your suggestions to them that they write Dr. Thompson or Dr. Neal concerning the code. I believe that he is waiting to hear from them before he forwards his advice to them. Cordially, i:vr W illar'd Mac hie, M. B. 0021298