HOUSTON, July 9 (Reuters) - U.S. safety investigators on Wednesday said leading U.S. refiner Valero Energy Corp lacked policies to prevent a devastating February 2007 fire that injured four people and ...

HOUSTON, July 9 (Reuters) - Valero Energy Corp. lacked policies to prevent the start of a devastating February 2007 fire that injured four people and shut its McKee refinery near Sunray, Texas, for ...