Approval and Promulgation of Air Quality Implementation Plans; Colorado; Revisions to Regulation Number 1

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EPA is taking direct final action approving State Implementation Plan revisions submitted by the State of Colorado on August 3, 2007 to Colorado's Regulation Number 1 (revisions to the performance testing requirements for air curtain destructors). Colorado adopted these rule revisions on October 2, 2006. All other actions submitted by the State of Colorado concurrent with Colorado's Regulation Number 1 revision request will be acted on at a later date. This action is being taken under section 110 of the Clean Air Act.