Approval and Promulgation of Air Quality Implementation Plans; Maryland; Infrastructure Requirements for the 2015 Ozone National Ambient Air Quality Standard

The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision submitted by the State of Maryland for the 2015 ozone national ambient air quality standard (NAAQS or standard). Whenever EPA promulgates a new or revised NAAQS, states are required to make a SIP submission showing how the existing approved SIP has all the provisions necessary to meet certain SIP requirements for the new or revised NAAQS, or to add any needed provisions necessary to meet these requirements. The SIP revision is required to address basic program elements, including, but not limited to, regulatory structure, monitoring, modeling, legal authority, and adequate resources necessary to assure attainment and maintenance of the standards. These elements are referred to as infrastructure requirements. Maryland has made a submittal addressing the infrastructure requirements for the 2015 ozone NAAQS. EPA is approving Maryland's SIP revision addressing the infrastructure requirements for the 2015 ozone NAAQS in accordance with the requirements of section 110(a) of the Clean Air Act (CAA).