ADEQ SIP For Regional Haze Program

EPA is proposing to approve in part and disapprove in part a revision of Arizona's State Implementation Plan (SIP) to implement the regional haze program for the first planning period through July 31, 2018. This proposed action includes all portions of the SIP except for three electric generating stations that were addressed in a final rule published in the Federal Register on December 5, 2012. The Clean Air Act (CAA) requires states to adopt and submit to EPA SIPs that assure reasonable progress toward the national goal of achieving natural visibility conditions in 156 national parks and wilderness areas designated as Class I areas.

EPA is taking action on Arizona's Best Available Retrofit Technology (BART) control analysis and determinations, Reasonable Progress Goals (RPGs) for the State's 12 Class I areas, Long-term Strategy (LTS), and other elements of the State's regional haze plan. If EPA takes final action to disapprove any portion of the SIP, EPA will work with the State to develop plan revisions to address the disapproved provisions.

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