Environmental Protection Agency July 10, 2013 – Federal Register Recent Federal Regulation Documents

Pursuant to its authority under the Clean Air Act (CAA), EPA is taking final action to approve portions of submissions made by the Indiana Department of Environmental Management (IDEM) to address the section 110(a)(1) and (2) requirements of the CAA, often referred to as the ``infrastructure'' state implementation plan (SIP). Specifically, we are finalizing the approval of portions of IDEM's submissions intended to meet certain requirements of sections 110(a)(2)(C), 110(a)(2)(D)(i)(II), and 110(a)(2)(J) of the CAA with respect to the 2006 24-hour PM2.5 national ambient air quality standards (2006 PM2.5 NAAQS). Among other provisions, these sections of the CAA require states to perform source impact analyses as part of their prevention of significant deterioration (PSD) programs. EPA is finalizing approval of Indiana's submissions intended to satisfy this requirement. The proposed rule associated with this final action was published on August 2, 2012.

EPA is taking final action approving State Implementation Plan (SIP) revisions submitted by the State of Colorado. On June 18, 2009, the Governor of Colorado's designee submitted to EPA a revised maintenance plan for the Ca[ntilde]on City area for the National Ambient Air Quality Standards (NAAQS) for particulate matter with an aerodynamic diameter less than or equal to 10 microns (PM10), which was adopted by the State on November 20, 2008. As required by Clean Air Act (CAA) section 175A(b), this revised maintenance plan addresses maintenance of the PM10 standard for a second 10-year period beyond the area's original redesignation to attainment for the PM10 NAAQS. In addition, EPA is also taking final action approving the revised maintenance plan's 2020 transportation conformity motor vehicle emissions budget for PM10. This action is being taken under sections 110 and 175A of the CAA.