The company said its repair and restart plans have been reviewed by the federal Pipeline and Hazardous Materials Safety Administration without objection, allowing a controlled return to service.
The oil leak was discovered early on the morning of November 11. 16 and an estimated 210,000 gallons of oil leaked into a grbady field about 20 miles south of the state line near Amherst in the northeastern tip of South Dakota.
According to a report on Monday night, Mark Cooper, a spokesman for the company, is on the site. He said that 172 people were working there and that 49,533 gallons of oil stopped in the field have been vacuumed and stored in tankers.
Cooper said that perhaps later in the week the process of excavating contaminated soil would begin.  The soil will be sent to an accredited facility in Minnesota that can "dispose of oil in an environmentally responsible manner," the company said.
So far, the company also said they monitored the air. The g team at the site has not detected any concerns and there have been no problems with the water, even after checking the wells for local owners. A well of a resident of the area was reviewed 1½ miles away and the company said the test results were normal.
Regarding any cause of flight, both TransCanada and PHMSA staff will complete preliminary inspections of the damaged section, and then send them to Washington, DC, for a full investigation by the National Board's Metallurgical Laboratory. Transportation Security, Cooper said.
He said there was not a timetable he knew when the cause could be determined.
Cooper said the damage to the pipe section was removed from the ground on Sunday.
It was discovered that a much smaller, earlier spill in the Keystone pipeline in southeastern South Dakota was caused by a defective weld in the pipeline.
The company also said that they continued to evaluate the "most appropriate restoration methods for the site" with state, federal and local officials.
As part of the plans for oil to flow again, TransCanada said it will operate the pipelines. under reduced pressure as of Tuesday to ensure a safe and gradual increase in the volume of crude oil moving through the system.
The company said it was working with its customers and will continue to work closely with them when it begins to return to normal operating conditions and will comply with any future order and requirements of PHMSA as a result of the oil spill to ensure the integrity of the pipeline.
The company also said that they continue to appreciate the cooperation and support of local officials, emergency response personnel and commissioners in Marshall County, as well as the owner who has granted permission to access the land for evaluation, repair and cleaning. activities above.