Document 6EjrjQ2OG30p9ejwkkN6DoV9

March 29, 1941 Dr. EL I- 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 Mood - G.Q&5 Kgs. ?b per 100 gms. Ms lead excretions are dropping off nicely and should reach normal in a few weeks. Pros this joint on it might be a good idea to take the samples once a week, rather than at twoweek Intervals. Ste urine sample on SRpHPls 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 dean 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 h 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 Dr. H. I . Hess - {2} - March 29 19^1 either B. . Howe or Kelly of the Factory Inspection Division, I would appreciate your suggestions to them that they write Dr. Thompson or Dr. Heal concerning the code. I believe that he is v?aiting to hear from them before he forwards his advice to them. Cordially, m vr V/ illard Mac id, M. D. K* 0021298