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Crews scrambled to contain a 12,000-litre oil spill off the Atlantic coast Thursday that has shut down production at the Hibernia offshore platform for two days.
ExxonMobil Canada is the largest shareholder of Hibernia, a large oil rig stationed 315 kilometres southeast of St. John's, N.L.
The company, a Canadian affiliate of the Texas-based energy giant, said it first spotted an oil slick on the water Wednesday and moved to investigate.
It later found a problem with a system aboard the rig that measures crude oil for storage, it said. A broader investigation has been launched and is still ongoing.
"The discharge, a mix of water and oil, occurred during routine activities related to removing water from one of the storage cells," a company statement reads.
Kilometres-wide oil slick drifting northeast
But production at the 220,000-barrel-per-day platform was "proactively shut down" late Wednesday in order to help ships deploy various collection systems to try to skim the oil off the water, mechanically disperse it or soak it up.
On Thursday evening, Hibernia Management and Development Company warned mariners that the oil slick had grown to a radius of 5.5 kilometres and is slowly drifting northeast.
The spill happened roughly eight months after Newfoundland and Labrador's largest-ever oil spill, which dumped 250,000 litres into the ocean about 350 kilometres east of St. John's in mid-November 2018, from Husky Energy's SeaRose platform.
That oil spill was never cleaned up; the regulatory body overseeing offshore oil operations said it was impossible after the oil sheen had broken up. Earlier in 2018, BP Canada's West Aquarius Drilling Unit, about 330 kilometres from Halifax, spilled 136,000 litres of toxic mud during exploratory oil drilling.
The regulator, the Canada-Newfoundland and Labrador Offshore Petroleum Board, said in a statement it had flown over the oil slick on Wednesday and determined it to be approximately 4.6 kilometres wide and of similar volume to the company's estimate.
It said it obtained satellite imagery taken Thursday morning showing the spill had broken into two oil slicks, and that it was awaiting results from a second surveillance flight. The regulator added it was in touch with the coast guard and Environment and Climate Change Canada's environmental emergency centre.
Few details on environmental impact so far
The company said all platform personnel are safe and that it has not observed any wildlife in the area yet, after sending out two observers by ship and aircraft.
ExxonMobil spokeswoman Lynn Evans couldn’t tell National Observer what environmental impact the spill will have. “Our environmental monitoring is ongoing,” she said in an emailed response to questions on Thursday.
Asked how much of the spilled oil the company has recovered so far, and how long it expected recovery of the rest to take, Evans said, “We are focused on our recovery efforts. I do not have any additional information.”
Evans could also not give an estimate as to how much the spill would cost the company, in terms of cleanup costs, lost revenue and other such elements. “Our focus is on response efforts,” she said.
Hibernia Management and Development Company is jointly owned by a number of energy firms.
ExxonMobil Canada owns a third of Hibernia’s shares, while Chevron Canada Resources owns over a quarter and Suncor owns a fifth.
Three others own smaller portions: Canada Hibernia Holding Corporation owns 8.5 per cent, Murphy Oil owns 6.5 per cent and Equinor Canada owns five per cent.