VIDEO: Crews have extinguished a butane fire that broke out at a refinery in North Salt Lake, and smoke from the blaze was visible from nearby freeways. Firefighters say the blaze began just after 6 p.m. Friday at the Big West Oil refinery near 300 West and Center Street in North Salt Lake. “We're hearing reports of a loud explosion, however right now we don't see any evidence of that,” said Fire Chief Jeff Bassett of the South Davis Metro Fire Department. Command staff at the refinery put existing safety measures into action to block off pipes and keep product from flowing during the fire.