Proposed federal rules would allow coal mines to release more toxins in their effluent
CBC
The federal government has bowed to provincial and industry lobbying in weakening proposed standards for coal mining effluent, critics say.
The draft regulations, released earlier this year, would double the amount of toxins — such as selenium — the mines are allowed to release and wouldn't apply to any mine that starts producing before 2027. Nor do they require companies to monitor overall environmental effects.
"Environment Canada got pushback," said Bill Donahue, an environmental scientific consultant and former head of monitoring for the Alberta government. "It dramatically reduced the proposed standards in terms of their stringency."
Environment Canada began reviewing its rules for coal mine effluent in 2017 and released a previous set of proposals in 2020.
The current proposals are weaker in several respects.
They allow effluent to contain up to 20 micrograms of selenium per litre in any one sample and a monthly average of 10 micrograms. That's twice as much as the previous proposal.
"Concerns were raised by industry and provinces over the achievability of previously proposed new mine limits," the document says.
Selenium is an element closely associated with coal. It accumulates in the environment and damages the ability of fish to reproduce.
Allowable limits for suspended solids, which damage fish habitat, would also be doubled — again in response to industry concerns.
As well, some contaminants associated with coal mines such as sodium, antimony and chloride won't have to be monitored, said Donahue.
Environment Canada also proposes to exempt from the new rules any mine that starts producing within three years of them coming into effect. Since the rules aren't expected to be proclaimed until the end of 2023 at the earliest, that means they wouldn't apply to any mine that starts producing before 2027.
A federal official, who spoke on background, defended the proposed contaminant limits.
"It is a number that is meant to be met at the end of pipe (where) you've got 100 per cent concentrated effluent. In the receiver, you've got some level of dilution."
The selenium limits are intended to be a consistent national standard and provinces may attach more stringent standards to individual mine permits, she said.
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