EPA is taking final action to disapprove revisions to the State Implementation Plan (SIP) for the State of Texas that relate to Emergency Orders. This includes portions of SIP revisions that relate to Emergency Orders that were submitted by Texas on August 31, 1993; December 10, 1998; February 1, 2006; and July 17, 2006. EPA is disapproving these revisions because these regulations do not meet the requirements of the Clean Air Act (the "Act" or "CAA"), EPA regulations, and applicable policy and guidance. EPA is taking this action under section 110 and parts C and D of Title I of the Act.