Federal officials want Illinois’ attorney general to ensure that a pipeline operator conducts a proper cleanup after an estimated 165,000 gallons of crude oil spilled in southern Illinois.

The oil leak started Friday in Edwardsville near Illinois 143 and entered Cahokia Creek, which runs parallel to the pipeline.

The Belleville News-Democrat reports that Marathon Pipe Line, which operates the pipeline, shut it down and sent equipment and workers to contain and clean up the oil.

EPA officials have asked Illinois’ attorney general to ensure that Marathon remediates the spill, assesses and repairs the pipeline, investigates the extent of the spill and takes other steps.

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