CLICK HERE to view photos showing a very large vapor cloud rising above the Chevron Richmond Refinery. In the first five photos the vapor cloud is whitish in color but after the cloud is ignited dark black smoke is visible.
The photos should be credited to Fototaker.net and were taken from Pier 39 in San Francisco located about nine miles across the bay from the Chevron Richmond Refinery.
PHOTO CREDIT: Fototaker.net