(AP) — In this Oct. 8, 2013 photo provided by the North Dakota Health Department, a vacuum trucks cleans up oil in near Tioga, N.D.
The North Dakota Health Department says more than 20,000 barrels of crude oil have spewed out of a Tesoro Corp. oil pipeline in a wheat field in northwestern North Dakota. Officials say the 20,600-barrel spill, among the largest recorded in the state, was discovered on Sept. 29 by a farmer harvesting wheat about nine miles south of Tioga. (AP Photo/North Dakota Health Department)