BILLINGS, Mont. - ExxonMobil Pipeline Co. crews have finished initial cleanup work on four sites contaminated when a pipeline carrying crude oil broke underneath the Yellowstone River three weeks ago.
The Environmental Protection Agency and the state Department of Environmental Quality will assess whether the cleanup is adequate.
Tom Livers, the state agency’s deputy director, told The Billings Gazette that state standards require the cleanup to continue until it would be more harmful than beneficial to the environment.
So far, 46 sites have been identified for cleanup after about 1,000 barrels of oil leaked into the river, starting on July 1.