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Vapor leak from unused pump caused Christmas Eve explosion and fire at Suncor refinery, OSHA finds

Federal investigation pinpoints ignition of fire that injured 2 workers, preceded months-long shutdown

Suncor's Commerce City oil refinery photographed in Commerce City, Colorado on Tuesday, January 3, 2023. (Photo by Hyoung Chang/The Denver Post)
Suncor’s Commerce City oil refinery photographed in Commerce City, Colorado on Tuesday, January 3, 2023. (Photo by Hyoung Chang/The Denver Post)
Noelle Phillips of The Denver Post.
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The Christmas Eve fire that injured two workers at Suncor Energy's Commerce City refinery began when a vapor cloud leaked from an unused pump valve and exploded as the facility was being shut down after extreme cold caused equipment failures, according to a federal investigation.
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