National Performance Audit Program: Ambient Air Audits of Analytical Proficiency, 1988

摘要

The report presents the results of the U.S. Environmental Protection Agency's 1988 National Ambient Air Performance Audit Program. Semiannual audits were conducted for lead, nitrate and sulfate on filter strips. One audit was conducted for high volume/PM-10 size selective inlet (SSI) sampler flow rate and carbon monoxide. Continuous sulfur dioxide monitors were audited throughout the year. Pilot-scale audits conducted for dichot sampler flow, continuous nitrogen dioxide monitors, and ozone monitors in 1988 were successful. These audits were initiated on a full-scale basis in 1989. The results of each 1988 audit are presented in tabular form for each concentration level. The overall performance for all participants for each audit conducted since the beginning of the program (with the exception of sulfur dioxide and high volume/PM-10 (SSI)) is also shown graphically.