The Environmental Protection Agency (EPA) is finalizing a partial approval, partial disapproval, and partial conditional approval of revisions to the Maricopa County Air Quality Department (MCAQD or County) portion of the Arizona State Implementation Plan (SIP). This action concerns the County's demonstration regarding reasonably available control technology (RACT) requirements and negative declarations for the 2008 8-hour ozone National Ambient Air Quality Standards (NAAQS or ``standards'') in the portion of the Phoenix-Mesa ozone nonattainment area under the jurisdiction of the MCAQD. The EPA is also finalizing a conditional approval of a MCAQD rule that regulates emissions from surface coating operations and was submitted with the RACT SIP demonstration.