Document JNap76b5mwqYYK627nVB9VEnO

STATE OF CALIFORNIA--HEALTH AND WELFARE AGENCY DEPARTMENT OF PUBLIC HEALTH 2151 BERKELEY WAY BERKELEY 94704 February 21, 111, RONALD REAGAN, Governor Mr. Victor Sussman Air Pollution Control Commission P.0. Box 90 Harrisburg, Pennsylvania 17120 Dear Mr. Sussman: This is to confirm our conversation of last we . which I called to your attention an error in my letter of 9 Fe'or . The third sentence in the paragraph below the pee riction equation should read: "We feel that an avei'age exposure o;.' icrograms per cubic meter can be predicted to result in an average' l o o d level of about 27 micrograms per 100 grams of blood." This error in citing units is the more regrettable as the units were not cited in t.ie prediction equation. Your attention is drawn to the fact that this relationship is useful no matter what fraction is assumed for respiratory retention of air borne lead. I In the off chance that you have not seen it, I enclose a paper published in the Proc. XV Congres Internationale de Medecine du Travail, (Vienna 19-2b Sep. 1966) showing a trend upward of blood and urine lead with experimental exposures to 10 micrograms per cubic meter. Please accept my apologies for giving you erroneous information due to a typographical slip-up. . I look forward with interest to the results of your Department's study of this problem. . S:' JRG:vc cc: Dr. Sturgis Mr. Malcolm Schoenly / lohn R. Goldsmith, M'.iD.D., Chief Environmental Hazardis Ejvaluation Unit ft Of 0 01 3 14 0 TABLE M - 4 BLOOD LEAD LEVELS AND ESTIMATED AMBIENT AIR OCCUPATIONAL EXPOSURES OF SELECTED POPULATIONS TYPE OF POPULATION ESTIMATED EXPOSURE (ug/M^) MEAN BLOOD LEAD (ug/100 (in Blood) Occupational Ambient Average^- Male Female Community Populations Without Occupational Exposures . Known ' Remote California mountain residents Composite rural U.S. Suburban Philadelphia Composite urban U.S. L.A. Aircraft workers Pasadena City employees Downtown Philadelphia 0.12 0.3 1.0 1.4 1.9 2.0 2.5 12 9 16 10 13 13 21 16 19 17 19 12 24 18 Populations With Known Occupational Exposures Cincinnati policemen (all) Cincinnati traffic policemen L.A. traffic policemen Cincinnati auto test lane inspectors Cincinnati garage workers Boston Sumner tunnel employees 4.6 10.0 10.0 14.0 21.0 44.5 2.0 .O 2.0 4.6 3.0 5.3 1.0 5.3 1.0 7.3 1.0 15.8 25 30 21 30 38 30 For populations with known occupational exposures, the average is a weighted average of presumed occupational and ambient exposure. Ambient exposures are estimates only and were not necessarily meas ured at the same times and places at which the populations were exposed. Source: Mean blood lead levels were taken from U.S. Public Health Publication No. 999-AP-12 (Survey of Lead in the Atmosphere of Three Urban Communities). Atmospheric lead exposures were estimated for these populations from this and other sources. 001 l N14912.01 FIGURE K - 1 BLOOD LEAD LEVELS BY ESTI MATED AMBI ENT AND OCCUPATIONAL AIR EXPOSURE FOR SELECTED POPULAT V V3 0