(March 10, 2020, 1:56 PM EDT) -- DENVER — Suncor Energy (U.S.A.) Inc. on March 6 agreed to pay $9 million to the Colorado Department of Public Health and Environment for emissions and operating and monitoring violations that occurred at its Commerce City, Colo., refinery between 2017 and 2019, the department announced, stating that it is the largest payment the state has received for violations at one facility (In the Matter of Suncor Energy (U.S.A.) Inc., Nos. 2019-097, 2019-194, Colo. Dept. Public Health & Envir.)....