National Aerometric Data Bank

Fig. 4-8. Sulfur dioxide concentration versus averaging time and frequency for 1980 at U S. National Aerometric Data Bank (NADB) Site 264280007 HOI, 8227 S. Broadway, St. Loutis, Missouri. Source Chart courtesy of Dr. Ralph Larsen, U.S. Environmental Protection Agency, Research Triangle Park, NC see also Fig. 19-13.

The location of the probe necessitates careful design and documentation to ensure that surrounding environmental conditions do not interfere with the subsequent interpretations of the measurement data. Examples of such minimal site descriptions are given in Table 6-3. Some of this information is now included with all the data logged into the epa s National Aerometric Data Bank, and some was provided by the control agencies. An example of a site description in southern California based on the requirements of the California Air Resources Board is shown in... 

The concentrations of atmospheric chromium in remote areas range from 0.005 to 2.6 ng/m3 (Barrie and Hoff 1985 Cary 1982 Schroeder et al. 1987 Sheridan and Zoller 1989). Saltzman et al. (1985) compared the levels of atmospheric chromium at 59 sites in U.S. cities during 1968-1971 with data from EPA s National Aerometric Data Bank file for 1975-1983. They concluded that atmospheric chromium levels may have declined in the early 1980s from the levels detected in the 1960s and 1970s. 

A. Federal, State Local Air Monitoring -National Aerometric Data Bank (NADB)... 

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