Denver-The restarting process was begun early last week at the Wynnewood Refinery near Oklahoma City, which was shut down by lightning-caused gasoline and diesel tank fires April 27, but according to local officials at parent Gary-Williams Energy Corp. it was still uncertain when refinery operations, including sulfur recovery, can be resumed. “We may be able to make a pretty good estimate in a couple of days,” reported GWEC spokeswoman Sally Allen. The fire started just before noon when the lightning hit a 50,000-barrel refinery gasoline storage tank. Later that night the fire spread to an adjacent 20,000-barrel diesel fuel tank. Anticipating a loss of power from lines passing near the burning tanks, refinery workers shut down the plant about midnight. The fires burned themselves out without incident the next day. There were no injuries and no environmental damage. GWEC described the effort as probably the largest sustained mutual aid response the area has ever experienced. An estimated 110 refinery firefighters and others from 15 mostly volunteer departments kept the fire contained to the two tanks. The Red Cross was on the scene throughout.