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A scene from last October's outage, which also led to the release of toxic chemicals.
Suncor incident spewed toxic gases

Suncor Refinery in Commerce City spewed toxic gases into the air on Saturday, March 11, after an Xcel power outage temporarily shut down operations, according to media reports.

A Suncor spokesman said the gases released did not warrant a big health risk at the refinery at 5801 Brighton Blvd. But more than 100 pounds of hydrogen sulfide and more than 500 pounds of sulfur dioxide gas was released into the air, exceeding state air quality limits, according to the Colorado Department of Health.

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