Technical Amendments to Procedure 6

The Environmental Protection Agency (EPA) is finalizing minor technical amendments to Procedure 6 that were proposed in the Federal Register on May 19, 2016. Procedure 6 includes quality assurance (QA) procedures for hydrogen chloride (HCl) continuous emission monitoring systems (CEMS) used for compliance determination at stationary sources. The QA procedures specify the minimum requirements necessary for the control and assessment of the quality of CEMS data submitted to the EPA. This action establishes consistent requirements for ensuring and assessing the quality of HCl data measured by CEMS that meet initial acceptance requirements in Performance Specification (PS) 18 of appendix B to part 60.