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.
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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.