||National trends in trace metals in ambient air 1965-1974 /
Faoro, Robert B. ;
McMullen., Thomas B.
||Environmental Protection Agency, Research Triangle Park, N.C. Office of Air Quality Planning and Standards.
|| U.S. Environment Protection Agency, Office of Air and Waste Management, Office of Air Quality Planning and Standards, Monitoring and Data Analysis Division,
Air pollution ;
Trace metals ;
Industrial wastes ;
Combustion products ;
Exhaust emissions ;
Gas analysis ;
Chemical analysis ;
Urban areas ;
Air quality data ;
National Air Surveillance Networks
||Research Triangle Park Library/RTP, NC
||Some EPA libraries have a fiche copy filed under the call number shown.
||iv, 28 p. : ill. ; 28 cm.
This report examines trends over the past 10 years (1965-74) in ambient concentrations for 11 metals: beryllium, cadmium, chromium, copper, cobalt, iron, lead, manganese, nickel, titanium, and vanadium. The trends are derived from samples collected from 92 urban and 16 nonurban hi-vol stations in the National Air Surveillance Network. For purposes of presentation, the trace metals were grouped into two broad categories: the metals related to fuel combustion and those related to industry. Possible reasons for the trends observed are given for most of the metals studied.
Includes bibliographical references.