EPA is approving several State Implementation Plan (SIP) revisions submitted to EPA by the State of North Carolina, through the North Carolina Department of Environment and Natural Resources (NC DENR), to address the nitrogen oxides (NO<INF>X</INF>) reasonably available control technology (RACT) requirements for the North Carolina portion of the Charlotte-Gastonia-Rock Hill, North Carolina--South Carolina 1997 8-hour ozone nonattainment area (hereafter referred to as the "bi-state Charlotte Area"). The bi-state Charlotte Area for the 1997 8-hour ozone national ambient air quality standards (NAAQS) includes six full counties and one partial county in North Carolina; and one partial county in South Carolina. Additionally, EPA is approving in part, and conditionally approving in part, several SIP revisions to address the volatile organic compounds (VOC) RACT requirements which include related control technology guidelines (CTG) requirements. Together, these SIP revisions establish the RACT requirements for sources located in the North Carolina portion of the bi-state Charlotte Area. In a separate rulemaking, EPA has already taken action on RACT and CTG requirements for the South Carolina portion of the bi-state Charlotte Area. EPA has evaluated the revisions to North Carolina's SIP, and has made the determination that they are consistent, with the exception of applicability for some CTG VOC sources, with statutory and regulatory requirements and EPA guidance. With respect to the applicability provisions for the CTG VOC sources noted above, EPA is finalizing a conditional approval of these provisions.