Tailings, a toxic mining by-product containing water, silt, residual bitumen and metals, have been seeping from Imperial’s northern Alberta site since last May.
Tailings, a toxic mining by-product containing water, silt, residual bitumen and metals, have been seeping from Imperial's northern Alberta site since last May.
Alberta's energy regulator has confirmed hazardous chemicals are present in a small waterbody after releases of tailings-contaminated wastewater from Imperial Oil's Kearl oilsands.