By Upstream staff
Shell Canada has restarted its Scotford upgrader near Fort Saskatchewan, Alberta after it was shut down following a hydrogen sulfide leak.
The company said that investigations into the cause of the leak are currently underway.
Shell had evacuated 1400 employees and contractors from the refinery and had warned its neighbours within a five-kilometre radius of the plant to stay indoors.
No detectable amounts of the gases remain and no one was reported to be injured.
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