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.
Return to Emissions Monitoring and Reporting for more information.
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)
- Part 75 Audit Spreadsheet (XLSM)(85MB, September 10, 2019)
- Part 75 CEMS Field Audit Manual (PDF)(107 pp, 2 MB, July 16, 2003)
- Part 75 CEMS Field Audit Manual: Appendix A - Example Audit Forms and Guide Sheets (PDF)(41 pp, 524 K, July 16, 2003)
- Abbreviated part 75 CEMS audit (PDF)(2 pp, 168 K, July 15, 2019)