SAN FRANCISCO - Mike Shaver, a concerned reader in Houston, called to ask if we were aware that blood lead levels were measured in ug/dl---micrograms per deciliter of whole blood. Ug/m3 is how air lead levels are measured. We are sorry for the mistake.In the story on NEWS p. 00-5996 about the Los Angeles Occupational Lead Project and its petition to the Standards Board for a general industry lead standard based on screening for blood lead levels, we consistently wrote ug/m3 instead of ug/dl, the blood
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