Marathon Petroleum agrees to Mich. site cleanup (AP) — Marathon Petroleum Co. has agreed to start cleaning up the source of oil byproducts under a former refinery site in West Michigan, and the company expects to submit a plan to state regulators later this year. Details of the overall cleanup plan haven't been determined, and the Michigan Department of Environmental Quality must approve Findlay, Ohio-based Marathon's plans. Under the agreement, the plan "may include cleanup, removal, disposal, on-site treatment, off-site treatment, active remediation, passive remediation, and/or ... Read More