Trans Mountain estimates as much as 1,195 barrels, or 190,000 litres, of light crude spilled from its pipeline pumping station in Abbotsford.
While an investigation is ongoing, the Crown-owned company said in a statement the cause of the spill appears to be related to a fitting on a one-inch, or 2.5-centimetre, piece of pipe.
The statement said the pipeline restarted on Sunday afternoon, after all safety protocols were completed.
It said the spill was fully contained on Trans Mountain property, the free-standing oil has been recovered and it will be disposed of at an approved facility.
Sumas First Nation Chief Dalton Silver said the spill happened just south of a cultural and burial ground of great significance to their people.
He said in a statement Sunday that it’s the fourth time in 15 years that there has been a spill from the pipeline on their land.
“Our main concern is for the clean-up of this spill and preventing further impacts to our territory. We need to have our monitors on the ground immediately.”
Trans Mountain said the site has permanent air and groundwater monitoring in place there’s no indication of a risk to the public or community.
“An Incident Command Post remains active and the company continues to work with local authorities, area Indigenous groups and regulators, including the Canada Energy Regulator, Transportation Safety Board and B.C. Ministry of Environment, in the oversight and cleanup of this incident,” the company said in a statement.
A spokesman for Minister of Natural Resources Seamus O’Regan said the department is “monitoring the situation closely.”
The pipeline was shut early Saturday when an alarm was received about the spill at the station in the B.C.’s Fraser Valley, not far from the U.S. border.
The pipeline moves about 300,000 barrels of crude a day between Alberta and B.C.’s waterfront terminal near Vancouver.
The federal government approved the expansion of the Trans Mountain pipeline last June that would see the crude capacity triple.
This report was initially published by the Canadian Press