Approval and Promulgation of State Implementation Plan Revisions; Infrastructure Requirements for the 1997 and 2006 PM2.5 National Ambient Air Quality Standards; Prevention of Significant Deterioration Requirements for PM2.5 Increments and Major and Minor Source Baseline Dates; State Board Requirements; North Dakota

EPA is approving the State Implementation Plan (SIP) submission from the State of North Dakota to demonstrate that the SIP meets the infrastructure requirements of the Clean Air Act (CAA) for the National Ambient Air Quality Standards (NAAQS) promulgated for fine particulate matter (PM<INF>2.5</INF>) on July 18, 1997 and on October 17, 2006. The CAA requires that each state, after a new or revised NAAQS is promulgated, review their SIPs to ensure that they meet infrastructure requirements. The State of North Dakota submitted certifications of their infrastructure SIP on August 12, 2010 and May 22, 2012 for the 2006 PM<INF>2.5</INF> NAAQS. In addition, the State of North Dakota submitted a certification of their infrastructure SIP on May 25, 2012 for the 1997 PM<INF>2.5</INF> NAAQS. EPA is also approving SIP revisions that the State of North Dakota submitted that update the Prevention of Significant Deterioration (PSD) program and the SIP provisions regarding state boards.