Exxon, Conoco say Yellowstone oil sheen not theirs

Moore said an oil-spill response team for the 60,000-barrels-per-day refinery had laid a containment boom at the point of origin.A spokesman for the Montana Department of Environmental Quality said ConocoPhillips’ 58,000-bpd refinery in Billings is located north of Exxon’s on the river and that they shared some pipelines and infrastructure.A spokesman for ConocoPhillips said it did not believe the sheen was related to them.”We are aware of this report and conducted our own investigation; we found no reason to believe it is related to our operations,” said Rich Johnson, the ConocoPhillips spokesman.Exxon said Billings refinery operations are normal.