From Zero Hedge (8/6/2012):
UPDATE: *CHEVRON RICHMOND REFINERY HYDROCRACKER EXPLODED: KPIX-TV, REFINERY SHUTDOWN, CAN PROCESS 244,000 BBL/DAY
Chevron's Richmond refinery, the largest refinery in California, is under a Level 3 Hazardous Material extreme immediate warning with local authorities advising local citizens to "to shelter in place, go inside, close all windows and doors, turn off all heaters, air conditioners and fans. If not using the fireplace, close fireplace dampers and vents, and cover cracks around doors and windows with tape or damped towels." As KTVU2 comments, it appears massive and out of control currently. Live KRON4 stream embedded.
*2 DISTINCT PLUMES OF SMOKES OBSERVED EMITTING FROM CVX REFINERY
*CHEVRON SPOKESWOMAN SAYS NOT SURE WHAT CAUSE OF FIRE IS :CVX US
*CHEVRON RICHMOND REFINERY HAS EVACUATION ON EMISSIONS: FILING
Live Stream from KRON4...
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Explosion happened at 6:15PM this evening (8/6/2012), one minor injury (minor burn to the wrist), according to the Chevron spokeswoman Melissa Richie. No information available as to what caused the explosion.
"Shelter in place" issued by the county (Contra Costa), but Chevron is not aware of the details yet.
Chevron spokeswoman cannot tell anything, doesn't know anything.
(I guess a spokesperson is like that anywhere in the world...)