A collection of photos from the Williston Herald/Forum Communications exclusive look inside the Tesoro oil spill cleanup near Tioga. (Photos: Jerry Burnes/Williston Herald)
TIOGA – Alarm bells went off for Eric Haugstad as the Tesoro official listened to the conference call from San Antonio.
Cleanup workers move a hose into place in order to pump oil from the ground north of Tioga.
A vac truck extracts oil from the trenches dug by cleanup crews working on the Tesoro oil spill.
Eric Haugstad, director of contingency planning and response for Tesoro, explains the process of cleaning up an oil spill.
Caution tape marks off a trench area of the oil spill cleanup, contrasting against Steve Jensen's land, where the spill happened.
A filtration system will remain on the spill site to help ship recovered oil away from Steve Jensen's land.
Contract workers pump pooled oil out from a trench on Steve Jensen's land north of Tioga on Thursday. A Tesoro pipeline spilled 20,600 barrels of crude on 7.3 acres of the wheat field.
A cleanup worker moves an extraction hose near the portion of the Tesoro pipeline Saturday that spilled 20,600 barrels of oil north Tioga.
A pool of oil settles in the bottom of a trench. Cleanup crews dug trenches and allowed the oil to run down and pool in order to vacuum it up easier.
A flag marking a geoprobing site sticks out of the ground as crews continue work on oil-damaged north of Tioga.
Oleophillic material is used to border the "hot zone" to prevent oil contamination from spreading to different parts of the land.
A hose runs out of a trench Saturday at a cleanup operation north of Tioga.
A steel bucket is used to drain extraction hoses so more oil isn't accidentally leaked back on to the land.
Four monitoring wells are placed around Steve Jensen's land to make sure ground and surface water isn't contaminated by the spill.
Crews block off a portion of the cleanup land for safety concerns. Deep trenches are dug on the land to allow oil to pool for easier extraction.
In the foreground, the new Tesoro pipe begins to be routed to its new location. The pipe is undergoing pressure testing, which has to be approved by PHMSA before the next stage can be started.
Brian Sullivan, vice president of corporate affairs for Tesoro Logistics, holds a piece of soil contaminated by the 20,600-barrel oil spill. Oil was burned off the ground level of the soil, which still smelled of Bakken crude.
Crews work to clean up a sight where 20,600 barrels of oil spilled after a pipeline broke near Tioga.