EPA is approving a State Implementation Plan (SIP) revision submitted by the State of North Carolina, through the North Carolina Department of Environmental and Natural Resources (NCDENR), on April 16, 2001. These revisions include the adoption of rules 15A NCAC 2D .0611 through .0615, the amending of .0501, .0903 and multiple rules within Chapter .0600 Monitoring: Recordkeeping: Reporting, the adoption of rules 15A NCAC 2Q .0316 and .0317 and the amending of rules .0109, .0803 and .0805 through .0808. The purpose of these revisions is to make the revised regulations consistent with the requirements of the Clean Air Act as amended in 1990 (CAA).