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 proposing to approve a Clean Air Act (CAA) section 111(d)/129 plan (the ``plan'') submitted by the Colorado Department of Public Health and Environment (CDPHE) on July 14, 2017. The plan would allow for the implementation of emissions guidelines for existing commercial and industrial solid waste incineration (CISWI) units within the jurisdiction of the State of Colorado. The plan creates new enforceable emissions limits and operating procedures for existing CISWI units within the State of Colorado in accordance with the requirements established by the revised CISWI new source performance standards (NSPS) and emission guidelines (EG), promulgated by the EPA on March 21, 2011, with subsequent final amendments to the rule promulgated on February 7, 2013. This proposed plan approval rulemaking is being taken in accordance with the requirements of sections 111(d) and 129 of the CAA and the relevant parts and subparts of the Code of Federal Regulations (CFR).