Chevron issued a Community Warning System Level 1 notification at 12:41 p.m. Tuesday for ongoing flaring at the Richmond refinery due to an upset at a process unit.
Chevron officials said they are investigating the issue.
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WATCH HEREBased on Contra Costa Health's three-tier hazardous materials severity system, CWS Level 1 notifications have no public health impacts and require no action from the community.
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