The Bay Area Air Quality Management District has announced a $5 million fine — the second-largest penalty the district has ever assessed — against the Marathon Martinez Refinery for alleged air quality violations.

The Martinez refinery is operated by Marathon subsidiary Tesoro Refining & Marketing Company LLC and the air district says the penalties were assessed for flaring that occurred when the refinery was idled in response to the COVID-19 pandemic.

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Dan McMenamin is the managing editor at Bay City News, directing daily news coverage of the 12-county greater Bay Area. He has worked for BCN since 2008 and has been managing editor since 2014 after previously serving as BCN’s San Francisco bureau reporter. A UC Davis graduate, he came to BCN after working for a newspaper and nonprofit in the Davis area. He handles staffing, including coaching of our interns, day-to-day coverage decisions and management of the newswire.