Reconsideration on the Mercury and Air Toxics Standards (MATS) and the Utility New Source Performance Standards; Final Action

The U.S. Environmental Protection Agency (EPA) is providing notice that it has responded to 23 petitions for reconsideration of the final rules titled National Emission Standards for Hazardous Air Pollutants (NESHAP) From Coal- and Oil-Fired Electric Utility Steam Generating Units and Standards of Performance (NSPS) for Fossil-Fuel- Fired Electric Utility, Industrial-Commercial-Institutional, and Small Industrial-Commercial-Institutional Steam Generating Units, published in the Federal Register on February 16, 2012. The agency previously granted reconsideration on several discrete issues and took final action on reconsideration through documents published in the Federal Register on April 24, 2013, and November 19, 2014. The Administrator denied the remaining requests for reconsideration in separate letters to the petitioners dated April 21, 2015. A document providing a full explanation of the agency's rationale for each denial is in the docket for these rules.