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WILLISTON, N.D. — More than 7,800 gallons of propylene glycol and more than 4,400 gallons of produced water spilled from a pipeline operated by the Hess Corporation in western North Dakota on Monday, Dec. 5, according to the state Department of Environmental Quality.
The spill happened about 2 miles north of Ray in Williams County and was detected during a pipeline pressure test, state officials said.
Hess alerted the Department of Environmental Quality to the spill, which affected agricultural land.
Propylene glycol is used as an antifreeze during pressure testing. Produced water is a byproduct of oil production.
Along with propylene glycol and produced water, Hess estimated about 7,800 gallons of fresh water also spilled, state officials said.
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Department of Environmental Quality staff are inspecting the site and will monitor the investigation and cleanup of the spill, state officials said
