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Pages 2-3

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From page 2...
... 2C H A P T E R 2 2.1 U.S. Standards for Airborne Lead Concentrations Concerns regarding adverse health effects associated with exposure to airborne lead resulted in lead being classified as an air pollutant pursuant to the Clean Air Act in 1976, followed by the requisite enactment of a health-based National Ambient Air Quality Standard (NAAQS)
From page 3...
... Regulation of Airborne Lead in the United States 3 Figure 1. Maximum 30-day average lead levels in California (1973–1998)

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