Environmental Protection Agency June 2, 2020 – Federal Register Recent Federal Regulation Documents

The Environmental Protection Agency (EPA) is taking final action on a state implementation plan (SIP) revision submitted by the State of Arizona on behalf of the Maricopa Association of Governments (MAG) to meet Clean Air Act (CAA or ``the Act'') requirements for the 2008 ozone national ambient air quality standards (NAAQS or ``standards'') in the Phoenix-Mesa (``Phoenix'') ozone nonattainment area (NAA). The EPA is finalizing approval of the portions of the ``MAG 2017 Eight-Hour Ozone Moderate Area Plan for the Maricopa Nonattainment Area (December 2016)'' (``MAG 2017 Ozone Plan'' or ``Plan'') that address the requirements for emissions inventories, a demonstration of attainment by the applicable attainment date, reasonably available control measures (RACM), reasonable further progress (RFP), motor vehicle emission budgets for transportation conformity, vehicle inspection and maintenance (I/M) programs, new source review (NSR) rules, and offsets. The EPA is finalizing a disapproval of the portion of the MAG 2017 Ozone Plan that addresses the requirements for contingency measures for failure to attain or to make RFP. However, based on a separate finding that the Phoenix 2008 ozone NAA (``Phoenix NAA'') attained the 2008 ozone standards by the applicable attainment date, we previously determined that the requirement for the State to submit a SIP revision addressing attainment contingency measures no longer applies for the Phoenix NAA. We are also finalizing our determination that the requirement for the State to submit a SIP revision addressing RFP contingency measures no longer applies for the Phoenix NAA. Finally, we are finalizing approval of the portions of a SIP revision, the ``MAG 2014 Eight-Hour Ozone PlanSubmittal of Marginal Area Requirements for the Maricopa Nonattainment Area (June 2014)'' (``MAG 2014 Ozone Plan''), on which we previously deferred action.