SAN FRANCISCO — A massive Chevron oil refinery fire that sent hundreds of people rushing to hospitals and is pushing West Coast gas prices higher was just the latest pollution incident at the facility that records show has increasingly violated air quality rules over the past five years.
The refinery is one of three such facilities near San Francisco that rank among the state's top 10 emitters of toxic chemicals, according to the U.S. Environmental Protection Agency's Toxic Release Inventory.
Chevron's Richmond refinery — the scene of Monday's fire that shrouded the area in black smoke — has been cited by San Francisco Bay area regulators for violating air regulations 93 times in the past five years.
The number has increased from 15 violations in 2007 to 23 in both 2010 and 2011. The refinery is also the state's largest emitter of greenhouse gases, according to state regulators.
The Richmond refinery produces about 150,000 barrels of gasoline a day — or 16 percent of the West Coast's daily gasoline consumption of 963,000 barrels, said Tom Kloza, chief oil analyst at Oil Price Information Service.