EPA Promulgates Regulations for Continuous Opacity Monitoring Systems

Posted Wednesday, May 21st, 2014

On May 16, 2014, the U.S. Environmental Protection Agency (EPA) published a final rule promulgating quality assurance and quality control (QA/QC) procedures for continuous opacity monitoring systems (COMS). This final action has been pending since early 2012 when EPA published a corresponding proposed rule.  EPA’s final rule addresses comments received on its 2012 proposal and states that the QA/QC procedures are modeled after manufacturers’ maintenance recommendations, and, as a result, most owners/operators are already following similar procedures. The procedures are codified in 40 C.F.R. part 60, Appendix F, and include requirements for daily instrument zero and upscale drift checks, daily status indicator checks, quarterly performance audits, annual zero alignments, and corrective actions for malfunctioning COMS.

The final rule is effective November 12, 2014.

For additional information, contact Andrew Holway.

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