The Environmental Protection Agency (EPA) is taking final action to approve four permitting rules submitted as a revision to the San Diego County Air Pollution Control District (SDAPCD or ``District'') portion of the California State Implementation Plan (SIP). These revisions concern the District's New Source Review (NSR) permitting program for new and modified sources of air pollution under section 110(a)(2)(C) and part D of title I of the Clean Air Act (CAA or ``Act'').

The Environmental Protection Agency (EPA) is taking final action to approve revisions to the State Implementation Plan (SIP) and Operating Permit Program for the State of Iowa. This final action will amend the SIP to update incorporations by reference to EPA methods for measuring air pollutant emissions, performance testing (stack testing) and continuous monitoring. These revisions do not impact the stringency of the SIP or have an adverse effect on air quality. The EPA's approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA).

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision from the New Mexico Environment Department (NMED) submitted on October 17, 2016, on behalf of the Albuquerque-Bernalillo County Air Quality Control Board (Air Board). The submittal is in response to the EPA's national SIP call on June 12, 2015, concerning excess emissions during periods of Startup, Shutdown, and Malfunction (SSM).

The Environmental Protection Agency (EPA) is redesignating the Oakridge, Oregon nonattainment area to attainment for the 1987 National Ambient Air Quality Standard for particulate matter of 10 microns or less (PM<INF>10</INF> NAAQS). The EPA is also approving a maintenance plan for the area that demonstrates continued compliance with the PM<INF>10</INF> NAAQS through the year 2035, which Oregon submitted, along with the redesignation request, for inclusion into the Oregon State Implementation Plan (SIP).