Promulgation of Federal Implementation Plan for ArizonaPhoenix PM-10 Moderate Area; Disapproval of State Implementation Plan for ArizonaPhoenix PM-10 Moderate Area

Under the authority of section 110(c)(1) of the Clean Air Act (CAA or ``the Act''), EPA is today promulgating a federal implementation plan (FIP) to address the moderate area PM-10 requirements for the Phoenix PM-10 nonattainment area. Specifically, for both the annual and 24-hour PM-10 standards, EPA is promulgating a demonstration that reasonably available control measures (RACM) will be implemented as soon as possible, a demonstration that it is impracticable for the area to attain the standards by the statutory attainment deadline and a demonstration that reasonable further progress (RFP) is being met. As part of the FIP, EPA is promulgating a fugitive dust rule to control PM-10 emissions from vacant lots, unpaved parking lots and unpaved roads, and is also promulgating an enforceable commitment to ensure that RACM for agricultural sources will be proposed by September 1999, finalized by April 2000 and implemented by June 2000. In addition, EPA is today finalizing its disapproval of the Arizona moderate area plan's RACM, RFP and impracticability, demonstrations because those demonstrations do not adequately address the Act's moderate area PM-10 requirements. EPA recently established a new standard for PM-2.5 and also revised the PM-10 standards; however, today's action does not address those standards.