Canada's oil sands mining industry on Thursday outlined proposals to release treated water from tailings ponds into northern Alberta's Athabasca River, a move environmental groups say risks damaging one of the world's largest freshwater deltas.
Unlike other extractive industries in Canada, oil sands firms are not allowed to release treated tailings water.
The total volume of oil sands tailings grew to 1.36 trillion cubic metres in 2020, according to the Alberta Energy Regulator, from 1.07 trillion cubic metres in 2017. "To this date, we have been doing everything but releasing the water ... while other options are in play and we have used many of them, they cannot replace the need for water release."
Producers say they have a number of methods to treat tailings. Suncor's Guest said the cost would be substantial but difficult to quantify until regulators determine exactly what criteria companies have to meet."Dumping the tailings is not safe, there has been no independent testing to prove what are saying is true," said Jesse Cardinal, executive director of Keepers of the Water.
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