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Canada to evaluate toxicity of substance discovered in oil sands tailings

Canada has actually accepted assess whether naphthenic acids found in northern Alberta's oil sands tailings ponds need to be classified as harmful under federal law, a relocation that might lead the way for stricter guidelines, environmental group Ecojustice stated on Thursday.

Tailings - a mix of water, clay, sand and trace metals - are a by-product of extracting bitumen from mined oil sands and are stored in substantial engineered ponds, some of which have actually been accumulating water because the 1960s.

The ponds have actually come under increased examination considering that last year, when it emerged wastewater had actually been leaking for months from a tailings pond at Imperial Oil's Kearl mine.

Ecojustice wrote to Canada's Environment Minister Steven Guilbeault in March officially requesting that the government study the danger that naphthenic acids from oil sands tailings position to human health and the environment.

Both the request and the information being gathered and generated by the Government and others supply clinical evidence on the prospective toxicity of OSPW NAs (oil sands process-affected water naphthenic acids) that calls for even more examination, Guilbeault reacted in a letter dated May 28 that was shared by Ecojustice.

Imperial and Canada's two other oil sands mining business, Suncor Energy and Canadian Natural Resources Ltd. , did not immediately respond to ask for remark.

The chemical substance will be added to a plan prioritizing. which substances need to be assessed under the Canadian. Environmental Management Act, Guilbeault added. That plan will. be finalised by June 2025.

The request was submitted by Ecojustice on behalf of the. Athabasca Chipewyan First Nation, which lies downstream of the. oil sands, and ecological groups. The neighboring Mikisew Cree. First Nation likewise submitted a comparable request, Ecojustice stated.

Naphthenic acids from tailings ponds have actually been found in. surface water and groundwater in the area, stated Ecojustice. lawyer Bronwyn Roe.

The damages that these chemicals trigger to people and the. environment requirement to be better comprehended, and NAs need to be. managed to avoid damaging exposure, Roe said in a news. release.

Scientific research studies have shown that naphthenic acids from oil. sands tailings are hazardous but the Canadian federal government has never ever. formally classed them as such, stated Alienor Rougeot, environment and. energy program supervisor at Environmental Defence.

If they are found to be hazardous that would unlock a lot of. regulatory tools, Rougeot added.

(source: Reuters)