(a) Determination of Attainment: Effective February 8, 2013, EPA has determined that, based on 2009 to 2011 ambient air quality data, the San Francisco Bay Area PM2.5 nonattainment area has attained the 2006 24-hour PM2.5 NAAQS. This determination 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 for as long as this area continues to attain the 2006 24-hour PM2.5 NAAQS. If EPA determines, after notice-and-comment rulemaking, that this area no longer meets the 2006 PM2.5 NAAQS, the corresponding determination of attainment for that area shall be withdrawn.
(b) Determination of Attainment: Effective February 11, 2013, EPA has determined that, based on 2009 to 2011 ambient air quality data, the Yuba City-Marysville PM2.5 nonattainment area has attained the 2006 24-hour PM2.5 NAAQS. This determination 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 for as long as this area continues to attain the 2006 24-hour PM2.5 NAAQS. If EPA determines, after notice-and-comment rulemaking, that this area no longer meets the 2006 PM2.5 NAAQS, the corresponding determination of attainment for that area shall be withdrawn.
(c) Determination of Attainment: Effective August 14, 2013, EPA has determined that, based on 2010 to 2012 ambient air quality data, the Sacramento PM2.5 nonattainment area has attained the 2006 24-hour PM2.5 NAAQS. This determination 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 for as long as this area continues to attain the 2006 24-hour PM2.5 NAAQS. If EPA determines, after notice-and-comment rulemaking, that this area no longer meets the 2006 24-hour PM2.5 NAAQS, the corresponding determination of attainment for that area shall be withdrawn.
(d) Determination of Attainment: Effective October 10, 2013, EPA has determined that, based on 2010 to 2012 ambient air quality data, the Chico PM2.5 nonattainment area has attained the 2006 24-hour PM2.5 NAAQS. This determination 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 for as long as this area continues to attain the 2006 24-hour PM2.5 NAAQS. If EPA determines, after notice-and-comment rulemaking, that this area no longer meets the 2006 24-hour PM2.5 NAAQS, the corresponding determination of attainment for that area shall be withdrawn. [78 FR 1761, Jan. 9, 2013, as amended at 78 FR 2213, Jan. 10, 2013; 78 FR 42021, July 15, 2013; 78 FR 55228, Sept. 10, 2013] Sec. Sec. 52.248-52.251 [Reserved]