(June 25, 2019, 12:27 PM EDT) -- CHEYENNE, Wyo. — A refining company on June 20 agreed to pay a $1.6 million civil penalty for violating the terms of a 2008 consent decree filed in Wyoming federal court that required it to reduce levels of sulfur dioxide emission and implement monitoring requirements to remedy violations of the Clean Air Act (CAA) (United States, et al. v. Holly Refining and Marketing Tulsa LLC, et al., No. 08-cv-00020, D. Wyo.)....