American Bottom Conservancy and Sierra Club (“Petitioners”) petitioned the Environmental Appeals Board (“Board”) to review various aspects of a Clean Air Act
(“CAA”) Prevention of Significant Deterioration (“PSD”) permit that the Illinois Environmental Protection Agency (“IEPA”) issued to ConocoPhillips Company
(“ConocoPhillips”) on July 19, 2007. The permit authorizes the Coker and Refinery Expansion Project (“CORE Project”) at the Wood River Refinery in Roxana, Illinois.