This March 9, 2010 file photo shows a tanker truck passing the Chevron oil refinery in Richmond, Calif.
This March 9, 2010 file photo shows a tanker truck passing the Chevron oil refinery in Richmond, Calif. Paul Sakuma AP
This March 9, 2010 file photo shows a tanker truck passing the Chevron oil refinery in Richmond, Calif. Paul Sakuma AP