Federal state and local investigators are working hard to try to figure out what led to the explosion and fire at the NuStar Energy facility in Crockett.
This story is from The SFGate. Read the rest of this News story at http://www.nbcbayarea.com/news/local/NuStar-Fuel-Storage-Facility-Shut-Down-While-Investigation-Continues-Into-Explosions-Fire-563336661.html.