The U.S. Court of Appeals for the Sixth Circuit has ruled that the U.S. Environmental Protection Agency (EPA) improperly relied on a “functional interrelationship” analysis to determine that a natural gas sweetening plant and approximately 100 natural gas well sites scattered over 43 square miles constituted a single stationary source under the Clean Air Act (CAA). Summit Petroleum Corp. v. U.S. Environmental Protection Agency, 690 F.3d 733 (6th Cir. 2012). As a result, EPA may need to reconsider its longstanding position on how broadly the term “single source” sweeps, which could impact facilities far beyond the oil and gas industry.
