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EPA Promulgates Procedure 3 (COMS QA Procedures) (5/16/14)

On May 16, 2014, EPA published Procedure 3, Quality Assurance Requirements for Continuous Opacity Monitoring Systems at Stationary Sources, as a final rule in the Federal Register.  Procedure 3 establishes the ongoing QA/QC requirements for COMS.  Affected sources must comply with Procedure 3 no later than November 12, 2014.  Procedure 3 requires daily calibration drift tests; quarterly calibration error tests, optical alignment checks and zero compensation checks; and annual zero alignment audits. Procedure 3 also requires affected sources to develop written QA/QC procedures for conducting the required tests.  Procedure 3 allows the use of a temporary COMS to replace the primary analyzer during repairs.  Section 10.5 also requires affected sources to develop a corrective action program that addresses what diagnostic tests must be performed after certain preventive and corrective maintenance procedures to ensure that the COMS is collecting valid data.  Along these lines, the final Procedure 3 excludes Table 17-1 from the proposed Procedure 3 (published in the Federal Register on February 14, 2012) which was more prescriptive in defining the required diagnostic and/or recertification tests.    A copy of the final Procedure 3 can be found in our FTP library.

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Last Revised: February 16, 2016