Environmental Protection Agency August 23, 2013 – Federal Register Recent Federal Regulation Documents

EPA is proposing to partially approve and partially disapprove the State Implementation Plan (SIP) submissions from the State of Utah 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 particulate matter less than or equal to 2.5 micrometers ([mu]m) in diameter (PM2.5) 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 SIP to ensure that it meets the requirements of the ``infrastructure elements'' necessary to implement the new or revised NAAQS. The State of Utah provided infrastructure submissions for the 1997 and 2006 PM2.5 NAAQS, dated April 17, 2008 and September 21, 2010, respectively. We propose to disapprove the submissions with respect to the requirements for state boards and to approve the remaining submissions that we have not already acted on. We also propose to approve portions of a submission from the State which was received by EPA on March 19, 2012. This submission revises Utah's Prevention of Significant Deterioration (PSD) program to meet Federal requirements as they existed on July 1, 2011, including required elements of EPA's 2008 PM2.5 New Source Review (NSR) Implementation Rule and 2010 PM2.5 Increment Rule. EPA acted separately on the State's submissions to meet certain interstate transport requirements of the CAA for the 2006 PM2.5 NAAQS.

EPA is proposing to approve revisions to the Maricopa County Area portion of the Arizona State Implementation Plan (SIP). These revisions concern particulate matter (PM) emissions from fugitive dust sources. We are approving local statutes that regulate these emission sources under the Clean Air Act as amended in 1990 (CAA or the Act). We are taking comments on this proposal and plan to follow with a final action.