Occupational Exposure to Inorganic Compounds of Lead

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Abstract
A group, initially of 60 persons, was subjected to mild occupational exposure to lead during a period of two years’ work in a new smelter. These men, under medical surveillance in an area in which the concentrations of lead in the air were determined at multiple sites on a bimonthly schedule, provided specimens of urine, also bimonthly, at the end of four hours of work on a morning shift. Urine was analyzed for content of lead, ε-aminolevulinic acid, and coproporphyrin. The data, while interesting, are not sufficiently revealing to provide suitable criteria for the appraisal of the severity of the exposure in relation to the danger of its continuance.