Approval and Promulgation of Implementation Plans; Alabama Prevention of Significant Deterioration and Nonattainment New Source Review

EPA is taking final action to approve revisions to the Alabama State Implementation Plan (SIP) submitted by the State of Alabama on June 16, 2006. The SIP revisions modify Alabama's Prevention of Significant Deterioration (PSD regulations in the Alabama SIP to address changes to the federal New Source Review (NSR) regulations, which were promulgated by EPA on December 31, 2002, and reconsidered with minor changes on November 7, 2003 (commonly referred to as the "2002 NSR Reform Rules"). EPA proposed approval of these revisions on January 24, 2008; no comments were received on that proposal. The revisions include provisions for baseline emissions calculations, an actual-to-projected-actual methodology for calculating emissions changes, options for plantwide applicability limits, and recordkeeping and reporting requirements.