Partial Approval, Conditional Approval, and Partial Disapproval of Air Quality State Implementation Plans; Nevada; Infrastructure Requirements for Fine Particulate Matter

The Environmental Protection Agency (EPA) is approving in part, conditionally approving in part, and disapproving in part a state implementation plan (SIP) revision submitted by the State of Nevada pursuant to the requirements of the Clean Air Act (CAA or "Act") for the implementation, maintenance, and enforcement of the 2012 national ambient air quality standards (NAAQS) for particulate matter less than 2.5 micrometers in diameter (PM<INF>2.5</INF>). As part of this action, we are reclassifying certain regions of the State for emergency episode planning purposes with respect to PM<INF>2.5</INF>. We are also approving an exemption from emergency episode planning requirements for PM<INF>2.5</INF> for the Nevada Division of Environmental Protection (NDEP) and Washoe County. Finally, we are approving two new definitions and four regulatory revisions into the Nevada SIP.