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Associated Press  Tuesday, Aug. 7, 2012
Smoke and flame billow from a crude oil unit at the Chevron refinery in Richmond, Calif., Monday, Aug. 6, 2012. ...

Smoke and flame billow from a crude oil unit at the Chevron refinery in Richmond, Calif., Monday, Aug. 6, 2012. The facility makes high-quality products that include gasoline, jet fuel, diesel fuel and lubricants, as well as chemicals used to manufacture many other useful products.

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