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

EPA is approving in part and disapproving in part State Implementation Plan (SIP) revisions submitted by the state of Nevada pursuant to the requirements of the Clean Air Act (CAA) for the 1997 8- hour ozone national ambient air quality standards (NAAQS) and the 1997 and 2006 NAAQS for fine particulate matter (PM<INF>2.5</INF>). The CAA requires that each State adopt and submit a SIP for the implementation, maintenance, and enforcement of each NAAQS promulgated by the EPA, and requires EPA to act on such SIPs. Nevada has met most of the applicable requirements. Where EPA is disapproving, in part, Nevada's SIP revisions, the majority of the deficiencies have been already been addressed by a federal implementation plan (FIP). For one remaining deficiency, this final rule sets a two-year deadline for EPA to promulgate a FIP, unless EPA approves an adequate SIP revision prior to that time. EPA remains committed to working with Nevada's environmental agencies to develop such a SIP revision.