The EPA is approving revisions to the New Mexico State Implementation Plan (SIP) submitted by the Governor of New Mexico on behalf of the New Mexico Environment Department (NMED) in a letter dated October 7, 2008 (the October 7, 2008 SIP submittal). The October 7, 2008 SIP submittal concerns revisions to New Mexico Administrative Code Title 20, Chapter 2, Part 7 Excess Emissions (20.2.7 NMAC--Excess Emissions) occurring during startup, shutdown, and malfunction related activities. We are approving the October 7, 2008 SIP submittal because the revisions to 20.2.7 NMAC are consistent with the Clean Air Act (the Act). This action is in accordance with section 110 of the Act.