(a) Determination of attainment. EPA has determined, as of May 16, 2012, that based on 2007 to 2009 and 2008 to 2010 ambient air quality data, the Philadelphia-Wilmington, PA-NJ-DE nonattainment area has attained the 1997 annual PM_2.5 NAAQS. This determination, in accordance with 40 CFR 51.1004(c), suspends the requirements for this area to submit an attainment demonstration, associated reasonably available control measures, a reasonable further progress plan, contingency measures, and other planning SIPs related to attainment of the standard for as long as this area continues to meet the 1997 annual PM_2.5 NAAQS.

(b) Determination of Attainment. EPA has also determined, as of January 7, 2013, that based on 2008 to 2010 and 2009 to 2011 ambient air quality data, the Philadelphia-Wilmington, PA-NJ-DE fine particulate matter (PM_2.5) nonattainment area has attained the 2006 24-hour PM_2.5 national ambient air quality standards (NAAQS). This determination suspends the requirements for the State of DE to submit, for the Philadelphia-Wilmington, PA-NJ-DE PM_2.5 nonattainment area, an attainment demonstration, associated reasonably available control measures, a reasonable further progress plan, contingency measures, and other planning SIPs related to attainment of the standard for as long as this area continues to meet the 2006 24-hour PM_2.5 NAAQS.

(c) EPA approves the attainment plan for the 1997 annual fine particulate matter (PM_2.5) national ambient air quality standard (NAAQS) for the Philadelphia-Wilmington, Pennsylvania-New Jersey-Delaware nonattainment area submitted by the Secretary of the Delaware Department of Natural Resources and Environmental Control on April 3, 2008, as amended on April 25, 2012. The attainment plan includes the attainment demonstration and motor vehicle emission budgets in tons per year (tpy) used for transportation conformity purposes for New Castle County, Delaware. The attainment plan also includes an analysis of reasonably available control measures and reasonably available control technology, contingency measures and the 2002 base year emissions inventory. The 2002 base year emissions inventory was approved in a separate rulemaking action on March 4, 2013 (78 FR 10420).

(d) EPA approves the maintenance plan for the Delaware portion of the Philadelphia-Wilmington, PA-NJ-DE PM_2.5 Nonattainment Area (New Castle County) for the 1997 annual fine particulate matter (PM_2.5) national ambient air quality standard (NAAQS) submitted by the Secretary of the Delaware Department of Natural Resources and Environmental Control on December 12, 2012. The maintenance plans include motor vehicle emission budgets in tons per year (tpy) used for transportation conformity purposes for New Castle County, Delaware.

(e) EPA approves the maintenance plan for the Delaware portion of the Philadelphia-Wilmington, PA-NJ-DE PM_2.5 Nonattainment Area (New Castle County) for the 2006 24-hour fine particulate matter (PM_2.5) national ambient air quality standard (NAAQS) submitted by the Secretary of the Delaware Department of Natural Resources and Environmental Control on December 12, 2012. The maintenance plans include motor vehicle emission budgets in tons per year (tpy) used for transportation conformity purposes for New Castle County, Delaware.