On 05/16/14, U.S. EPA published in the Federal Register a final rule that establishes Procedure 3 under 40 CFR 60 Appendix F: Quality Assurance Requirements for Continuous Opacity Monitoring Systems (COMS) at Stationary Sources. This procedure is applicable to sources that use COMS to demonstrate compliance with NSPS opacity limits. Procedure 3 is intended to establish the minimum QA/QC requirements to verify and maintain an acceptable level of quality of the data produced by COMS. U.S. EPA based the procedure on COMS manufacturer maintenance recommendations and believes that most facilities already meet these requirements. The rule is effective on November 12, 2014.
Procedure 3 provides requirements for:
(1) Daily instrument zero and upscale drift checks and status indicators checks;}(2) Quarterly performance audits which include the following assessments (some of which may be relaxed to semiannual depending on the results):
(i) Optical alignment,
(ii) Calibration error, and
(iii) Zero compensation.
(3) Annual zero alignment.
Procedure 3 also requires that a corrective action program be in place to address repair and maintenance of the COMS.
For more information, contact your EPS consultant.