When manufacturing operations shut down in 1961, nearly 100 years of hazardous by-products and residues were left behind on the Deloro Mine Site. These included a “complex blend of toxic compounds, metals like arsenic and colbalt, and low-level radioactive wastes”. The high levels of arsenic on the site is the main concern. The low-level radioactive slag and tailings produced during the re-refining of by-products from uranium processing has also had an impact. The operations at the Deloro Mine Site caused significant environmental impact including the contamination of soil, sediment, surface and ground water.
McIntosh Perry completed Professional Engineering services related to environmental sciences, design, contract administration and inspection services of the clean-up work. The province has spent $70 million cleaning up the mine-site ensuring the area is safe for people and the environment.
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