Valero begins restart of Port Arthur, Texas refinery, sources say | Reuters Skip to main content The refinery was shut on Monday night as the fire ignited by the explosion raged, the sources said. The refinery lost steam and water during the blaze. In a notice filed on Tuesday night with the Texas Commission on Environmental Quality, Valero said a release of process fuel ignited. The hydrotreater uses hydrogen to remove sulfur from hydrocarbons in compliance with U.S. environmental rules. Exclusive news, da ...