An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Air Emission Measurement Center (EMC)

Procedure 3 Quality Assurance Requirements for Continuous Opacity Monitoring Systems at Stationary Sources

Applicable Performance Specifications

PS-1 for Opacity

Supporting Information

Fact Sheet - Quality Assurance Requirements for Continuous Opacity Monitoring Systems at Stationary Sources(2 pp, 91 K, October 14, 2014, About PDF)
40 CFR Part 60, Appendix F, Procedure 3 – Suggested COMS diagnostic test(2 pp, 247 K, About PDF)

Procedure

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

Procedure 3 - Quality Assurance Requirements For Gas Continuous Emission Monitoring Systems Used For Compliance Determination 8-7-2017 (PDF)(8 pp, 381 K)
Promulgated quality assurance Procedure 3 Quality Assurance Requirements for Continuous Opacity Monitoring Systems at Stationary Sources