COMMERCE CITY — State-ordered remedies have not stopped toxic pollution from Suncor Energy’s oil refinery north of Denver — with new data showing benzene levels in Sand Creek and the South Platte River more than doubling last month.
Neither state regulators nor Suncor has calculated how much cancer-causing benzene and other contaminants have entered the waterways from an underground plume spreading from the refinery under the adjacent Metro Wastewater Treatment Plant.