Notes
This EPA technical report presents model-extrapolated estimates of airborne lead concentrations at U.S. airports resulting from the use of leaded aviation gasoline (avgas) in piston-engine aircraft. The report describes air quality modeling methods, air quality factors (AQFs), and national analysis methods used to identify airports where lead concentrations may exceed the National Ambient Air Quality Standards (NAAQS). Results include uncertainty characterization and identification of airports with potential lead levels above the NAAQS.