Montana Questions Exxon's Yellowstone Spill Estimate

Law360, New York (July 13, 2011, 2:26 PM EDT) -- The head of the Montana Department of Environmental Quality on Monday questioned Exxon Mobil Corp.'s estimate of the amount of oil that spilled into the Yellowstone River following the rupture of a company pipeline earlier this month.

In a letter to Exxon Chairman and CEO Rex Tillerson, Montana DEQ Director Richard H. Opper said the company had increased its estimated duration of the spill “10-fold” from its original claim of six minutes. However, Exxon hadn't revised its estimate of the spill's volume from an original projected...
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