The manual contains monitor-specific performance audit procedures and data forms for use in conducting audits of installed opacity continuous emission monitoring systems (CEMS). General auditing procedures and acceptance limits for various audit criteria are discussed. Practical considerations and common problems encountered in conducting audits are delineated, and recommendations are included to optimize the successful completion of performance audits. Performance audit procedures and field data forms were developed for six common opacity CEMS: (1) Lear Siegler, Inc. Model RM-41; (2) Lear Siegler, Inc. Model RM-4; (3) Dynatron Model 1100; (4) Thermo Electron, Inc. Model 400; (5) Thermo Electron, Inc. Model 1000A; and (6) Enviroplan Model D-R280 AV. Generic audit procedures have been included for use in evaluating opacity CEMS with multiple transmissometers and combiner devices. In addition, several approaches for evaluating the zero alignment or 'clear-path' zero response have been described. The zero alignment procedures have been included since the factor is fundamental to the accuracy of opacity monitoring data, even though the zero alignment checks cannot usually be conducted during a performance audit.

"Office of Research and Development, Environmental Monitoring Systems Laboratory." "EPA project officer, Thomas J. Logan." "April 1987." "EPA-600/8-87-025." "EPA contract no. 68-02-4125." "Work assignment nos. 140A and 182A." "EPA contract no. 68-02-4442, work assignment no. 11."