Huff Post
JASON DEAREN 08/08/12 09:04 PM ETAssociated Press 
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.
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