The Sierra Club petitions the Environmental Appeals Board (“Board”) to review a decision by the Department of Environmental Quality for Pima County, Arizona (“Pima County”) to issue a federal Prevention of Significant Deterioration (“PSD”) permit to Tucson Electric Power. The permit authorizes Tucson Electric Power to construct and operate up to ten additional electricitygenerating units (“Units”) at its Irvington Generating Station facility.

WildEarth Guardians (“Petitioner”) petition the Environmental Appeals Board (“Board”) to review a decision by U.S. EPA Region 8 (“Region”) to issue six synthetic minor new source review permits to Anadarko Uintah Midstream, LLC (“Anadarko”) authorizing continued operation of six natural gas compression facilities in Uintah County, Utah, within the boundaries of the Uintah and Ouray Indian Reservation. The Region issued the permits pursuant to the Federal Minor New Source Review Program in Indian Country. 40 C.F.R. §§ 49.151-.161.

The Center for Biological Diversity, Desert Citizens Against Pollution, California Communities Against Toxics, and Sierra Club (collectively “Conservation Groups” or “Groups”) petition the Environmental Appeals Board (“Board”) to review a Clean Air Act prevention of significant deterioration permit that the U.S. Environmental Protection Agency (“EPA”), Region 9 (“Region”), issued to Palmdale Energy, LLC (“Palmdale”).