Informal Request for ATI Records Previously Released

Organization: Canadian Nuclear Safety Commission

Year: 2023

Month: March

Request Number: A-2022-00063

Request Summary: Request Modified on 2023-02-01: Provide copies all records and reports of surface water quality (including pH and uranium values) in possession of the CNSC for the Gunnar Mine site (i.e. Langley Bay, Zeemel Bay, St. Mary's Channel) from 2019-present and for the Lorado Mill site (i.e. Nero Lake, Beaverlodge Lake) from 2016-present. Provide copies of briefing notes and correspondence with the licensee and the Saskatchewan Ministry of Environment relating to the statement regarding uranium concentrations in Langley Bay provided on page 132 of Regulatory Oversight Report for Uranium Mines, Mills, Historic, and Decommissioned Sites in Canada: 2020 "CNSC staff reviewed the results of SRC’s analyses and found that most of the contaminants were consistent with the previous years and with the 2014 Gunnar environmental impact statement [22]. As a result of the ongoing remediation activities at Gunnar, there were increases in uranium concentrations at the monitoring stations located in Langley Bay. CNSC staff will continue to review annual reports to determine whether this is a long-term trend. The ongoing remediation activities are not having a noticeable effect on the water quality at the other monitoring stations. Original Request: Provide copies all records and reports (2016 to present) of surface water quality (including pH and uranium values) in possession of the CNSC for the Gunnar Mine site (i.e. Langley Bay, Zeemel Bay, St. Mary's Channel) and for the Lorado Mill site (i.e. Nero Lake, Beaverlodge Lake). Provide copies of briefing notes and correspondence with the licensee and the Saskatchewan Ministry of Environment relating to the statement regarding uranium concentrations in Langley Bay provided on page 132 of Regulatory Oversight Report for Uranium Mines, Mills, Historic, and Decommissioned Sites in Canada: 2020 "CNSC staff reviewed the results of SRC’s analyses and found that most of the contaminants were consistent with the previous years and with the 2014 Gunnar environmental impact statement [22]. As a result of the ongoing remediation activities at Gunnar, there were increases in uranium concentrations at the monitoring stations located in Langley Bay. CNSC staff will continue to review annual reports to determine whether this is a long-term trend. The ongoing remediation activities are not having a noticeable effect on the water quality at the other monitoring stations."

Disposition: Disclosed in part

Number of pages: 13898

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