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