Document ZYYO7yeyj19oBv9GZq8wnLj7

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]L*mI liaciiaiaitoi **. e. HA^rNes.PResiDENT %JMM, BOWLBV. VICE PRESIDENT K. C. BROWNELL,VICE PRESIDENT J . A . MARTINO, VICE PRCSIOENT ROBERT LINDLEV ZIEOrCLD, SCCRETARV- TREASURER 4 2 0 LEXINGT ON AV EN U E MEWYORK17,M.Y. MANFRED BOWD1TCH DIRECTOROF HEALTHANDSAFETY March 16, 19$6 p.obert A. Kehoe, M. D. Director, Kettering Laboratory University of Cincinnati Fden Avenue Cincinnati 19, Ohio Dear Bob: I have recently dug from my files the letter from Bill Fredrick from which excerpts are herewith. I thought you might like to have these data in connection with the Los Angeles matter. Sincerely, Enclosure cc: Mr. Costello 0004866 Excerpts from letter dated April 22, 1955 From: Dr. William G. Fredrick, Sc.D. To: Manfred Bowditch 7/e have made a considerable number of determinations as to atmospheric lead content of the City of Detroit in past times but have not done so recently because the lead level stays consistently low. As far as general atmospheric lead samples are concerned, in'those examinedin the year 1951 maximumlead concentration was 13 micrograms per cubic meter and median was 0.6 micrograms. These samples were collected over the period from May 17 through June 17 in 1952. Samples collected over the period, August 7 to September 19 showed a maximumvalue of 1.6 microgram per cubic meter and a median value of O.ii micrograms. The average level of atmos pheric lead in the general air is consistently below 1 microgram per cubic meter. Te have done certain air sampling in the neighborhood of a small lead smelter over a period of approximately 30 days and the lead concentration ranged from 0.U9 to 12.5 microgram per cubic meter. Samples taken in the neighborhood of a brass foundry utilizing a cupola for melting high lead alloy showed values of h to 9 microgram per cubic meter. Shortly after the report to which you make reference appeared, and which I believe came to our attention, in Time magazine, we took a Zh hour sample of air about 10 feet above ground in one of our most heavily trafficed downtown streets. The lead content of this atmosphere was less than 1*microgram per cubic meter. I believe that you can obtain some detailed information concerning the news report which was obviously a misunderstanding from Mr. Leslie Chambers, F.obert Taft Laboratories, U.3. Public Health Service, Cincinnati, Ohio N7181.01