Initial tests show water supplies in a Montana city show no sign of a cancer-causing element for the first time since they were contaminated by a weekend crude oil spill, a state official said Thursday, raising hopes that thousands of residents can soon start drinking from their taps. Glendive's water no longer shows elevated levels of benzene, a carcinogenic component of oil, in tests taken from fire hydrants, said Jeni Garcin with the Montana Department of Environmental Quality.