Approval and Promulgation of Implementation Plans; North Carolina: Charlotte, Raleigh-Durham, and Winston-Salem Areas Second 10-Year Maintenance Plan for the Carbon Monoxide National Ambient Air Quality Standard

The EPA is approving a revision to the North Carolina State Implementation Plan (SIP) submitted in final form on March 23, 2005. The SIP revision provides the second 10-year maintenance plan for the Charlotte, Raleigh-Durham, and Winston-Salem Carbon Monoxide Maintenance Areas, which are composed of the following four counties: Mecklenburg (Charlotte Area); Durham and Wake (Raleigh-Durham Area); and Forsyth (Winston-Salem Area). The second 10-year maintenance plan includes new motor vehicle emission budgets (MVEBs) for carbon monoxide for the year 2015. EPA is approving this SIP revision, including the new 2015 MVEBs for carbon monoxide, because it satisfies the requirement of the Clean Air Act (CAA) for the second 10-year maintenance plan for the Charlotte, Raleigh-Durham, and Winston-Salem Areas. In addition, in this rulemaking, EPA is providing information on its transportation conformity adequacy determination for new MVEBs for the year 2015 that are contained in the second 10-year carbon monoxide maintenance plan for the Charlotte, Raleigh-Durham, and Winston-Salem Areas. EPA determined that the 2015 MVEBs are adequate through a previous action.