|EPA has issued rules
covering over 80 categories of major industrial sources, such as chemical
plants, oil refineries, aerospace manufacturers, and steel mills, as well as
categories of smaller sources, such as dry cleaners, commercial sterilizers,
secondary lead smelters, and chromium electroplating facilities.
|EPA and state
governments (e.g., California) have reduced emissions of benzene, toluene,
and other air toxics from mobile sources by requiring the use of reformulated
gasoline and placing limits on tailpipe emissions.