Citation:

Logan, T.J., K. Hazel, S. Plaisance, AND J. Feeler. TECHNICAL ASSISTANCE DOCUMENT, PERFORMANCE AUDIT PROCEDURES FOR OPACITY MONITORS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-92/110.

Description:

This manual contains monitor-specific performance audIt procedures and data forms for use in conducting audits of installed continuous opacity monitoring systems (COMSs). eneral auditing procedure and acceptance criteria for various audit criteria are delineated. Practical considerations and common problems encountered in conducting audits are discussed, and recommendations are included to optimize the successful completion of performance audits. Performance audit procedures and field data forms ware developed for the following opacity monitors: (1) Lear Siegler Measurement Controls Corporation Dynatron 1100M and MC2000; (2) Lear Siegler Measurement Controls Corporation Model RM-41; (3) Lear Siegler Measurement Controls Corporation Model RM-4; (4) Dynatron Model 1100; (5) Thermo Environmental Instruments, Inc. Model 400: (8) Thermo Environmental Instruments, Inc. Model 1000A; (7) Thermo Environmental Instruments, Inc, Model D-R280AV; (8) Enviroplan Model CEMOP-281; (9) United Sciences, Inc, Model 5OOC; (10) Land Combustion Model 4500; and (11) DataTest Models 900A and 900PM. The concise step-by-step format of the audit procedures promotes a thorough evaluation of the quality of the monitoring data and the reliability of the opacity monitoring program. eneric audit procedures have been included for use in evaluating COMSs with multiple transmissometers and combiner devices. n addition, several approaches for evaluating the zero alignment or "clear-path" zero response have been described. lthough the zero alignment checks cannot usually be conducted during a performance audit, the zero alignment procedures have been included because this factor is fundamental to the accuracy of opacity monitoring data.

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