pool of contaminated fluid

Imperial and Alberta regulator knew for years about oilsands tailings seepage, documents show

Imperial and Alberta regulator knew for years about oilsands tailings seepage, documents show

Documents filed by Imperial Oil Ltd. show the company and Alberta's energy regulator knew the Kearl oilsands mine was seeping tailings into groundwater years before a pool of contaminated fluid was reported on the surface, alarming area First Nations and triggering three investigations. "They knew there was seepage to groundwater," said Mandy Olsgard, an environmental toxicologist who has consulted for area First Nations.