BISMARCK, N.D. _ An oil pipeline spill that happened near Tioga last
fall could take about two years to clean up while remediation at the
site of a train derailment near Casselton could be done this summer,
state lawmakers were told Tuesday.
Members of the interim Energy
Development and Transmission Committee heard updates on both incidents
and had questions about the lessons learned from them.
David
Glatt, head of the environmental section of the North Dakota Health
Department, said work has continued at the Tioga site where a pipeline
owned by Tesoro Corp. began leaking crude oil on a wheat farm on Sept.
29. Approximately 20,600 barrels spilled, one of the largest spills in
state history.
“The contamination has gone down at least 30 feet,” Glatt said.
The water table is approximately 150 feet beneath the ground, he said.
So
far Tesoro has recovered approximately 6,000 barrels of oil. The spill
has been contained by French drains, a security fence and cut-off walls
to ensure that the oil doesn’t migrate beyond its current boundaries.
Glatt said Tesoro has submitted a plan in which it proposes to excavate the soil, treat, replace and rejuvenate it. MORE
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