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Clean Air Markets

Field Audit Manual

The Continuous Emissions Monitoring System (CEMS) Field Audit Manual details recommended procedures for conducting a field audit of a Part 75 monitoring system. Included are: tools you can use to prepare for an audit, techniques you can use to conduct the on-site inspection and review records, proper methods for observing performance tests, and guidelines for preparing a final report. EPA has designed the audit procedures in this document so that personnel with varying levels of experience can use them. Appendix A of the manual also provides checklists that can be used as a guideline to ensure that all necessary data are obtained during facility inspection. 

Questions can be emailed to Louis Nichols ( or directed to the appropriate EPA, state, and local contacts.

Part 75 CEMS Field Audit Mannual: Appendix A Example Audit Forms and Guide Sheets (DOC)(42 pp, 821 K, July 16, 2003)

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