Partial Approval and Disapproval of Air Quality State Implementation Plans (SIP); State of Nebraska; Infrastructure SIP Requirements for the 2008 Ozone National Ambient Air Quality Standard

The Environmental Protection Agency (EPA) is proposing to partially approve and partially disapprove elements of a State Implementation Plan (SIP) submission from the State of Nebraska addressing the applicable requirements of Clean Air Act (CAA) section 110 for the 2008 National Ambient Air Quality Standards (NAAQS) for Ozone (O3), which requires that each state adopt and submit a SIP to support implementation, maintenance, and enforcement of each new or revised NAAQS promulgated by EPA. These SIPs are commonly referred to as ``infrastructure'' SIPs. The infrastructure requirements are designed to ensure that the structural components of each state's air quality management program are adequate to meet the state's responsibilities under the CAA. EPA is proposing to disapprove Nebraska's SIP as it relates to section 110 with respect to visibility, for the 2008 O3 NAAQS.