Approval and Promulgation of State Plans for Designated Facilities and Pollutants; Colorado; Control of Emissions From Existing Commercial and Industrial Solid Waste Incineration Units

The Environmental Protection Agency (EPA) is approving a new state plan (the ``plan'') submitted by the Colorado Department of Public Health and Environment (CDPHE) for the regulation of existing commercial and industrial solid waste incineration (CISWI) units within the jurisdiction of the State of Colorado. The plan has been submitted to the EPA for approval following the promulgation of federal new source performance standards (NSPS) and emission guidelines (EG) for CISWI units on March 21, 2011, and the subsequent, limited revisions to that final rule on February 7, 2013, and June 23, 2016. This plan approval final rulemaking action is being taken in accordance with sections 111(d) and 129 of the Clean Air Act (CAA, or the ``Act'').