(a) Addition to the Colorado State Implementation Plan of the Colorado Interstate Transport regarding the 1997 8-Hour Ozone Standard for the “significant contribution,” the “interference with maintenance” requirements, and the addition of “interference with visibility protection” requirements regarding the 1997 8-Hour Ozone and PM2.5 Standards, submitted by the Governor's designee on June 18, 2009 and March 31, 2010.
(b) Addition to the Colorado State Implementation Plan of the Colorado Interstate Transport SIP regarding the 1997 8-Hour Ozone and 1997 PM2.5 Standards for the “interference with prevention of significant deterioration” requirement, and the addition of the “significant contribution” and “interference with maintenance” requirements regarding the 1997 PM2.5 Standards, submitted by the Governor's designee on March 31, 2010.
(c) Addition to the Colorado State Implementation Plan of the Colorado Interstate Transport SIP regarding 2006 PM2.5 Standards for all four of the CAA section 110(a)(2)(D)(i) requirements submitted by the Governor's designee on May 11, 2012.
(d) Addition to the Colorado State Implementation Plan of the Colorado Interstate Transport SIP regarding 2008 Ozone Standards for both of the CAA section 110(a)(2)(D)(i)(I) requirements submitted to EPA on December 31, 2012.
(e) Addition to the Colorado State Implementation Plan of the Colorado Interstate Transport SIP regarding 2012 PM2.5 Standards, submitted to EPA on December 1, 2015, for both elements of CAA section 110(a)(2)(D)(i)(I) for the 2012 PM2.5 NAAQS.
(f) Addition to the Colorado State Implementation Plan of the Colorado Interstate Transport SIP regarding 2010 Standards, submitted to EPA on July 17, 2013, and February 16, 2018, for both elements of CAA section 110(a)(2)(D)(i)(I) for the 2010 SO2 NAAQS.
[77 FR 1039, Jan. 9, 2012, as amended at 80 FR 47864, Aug. 10, 2015; 81 FR 7708, Feb. 16, 2016; 83 FR 31329, July 5, 2018; 83 FR 44503, Aug. 31, 2018]