Air Plan Disapproval; Colorado; RACT Elements for the 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area

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The Environmental Protection Agency (EPA) is disapproving portions of a state implementation plan (SIP) revision submitted by the State of Colorado to meet Clean Air Act (CAA) requirements for the 2008 8-hour ozone national ambient air quality standards (NAAQS) in the Denver Metro/North Front Range nonattainment area (DMNFR Area). Specifically, the EPA is disapproving certain reasonably available control technology (RACT) SIP submittals.