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- Memo: Opacity Monitor Manufacturers Certifying Conformance with PS-1(3 pp, 522 K, March 20, 2017 About PDF)
- 40 CFR Part 60, Appendix F, Quality Assurance Procedure 3
- 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, 241 K, About PDF)