Lack of safeguards led to Superior refinery explosion, U.S. regulators say

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https://i.cbc.ca/1.4638929.1672872000!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_460/husky-energy-refinery-blast.jpg U.S. federal regulators have determined that a lack of safeguards during a maintenance shutdown led to a 2018 explosion at an oil refinery in Superior.


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