Centerra Gold is a signatory to the International Cyanide Management Code for the Manufacture, Transport and Use of Cyanide in the Production of Gold (the Cyanide Code). Independent auditors determined that Kumtor’s gold mining operations were in substantial compliance with the Cyanide Code and issued a Corrective Action Request (CAR) relating to ICMC Standard of Practice Section Reference 4.4(5). This relates to cyanide concentrations discharged into the tailings impoundment system not being consistently maintained below 50 mg/L. The operation's transportation aspects related to cyanide were deemed to be compliant with the Code.
Prizma is conducting a study to either demonstrate that the current cyanide concentrations does not cause wildlife mortality due to site specific protective mechanisms, including those that may be linked to Kumtor’s high altitude location (ca. 4000 meters above sea level) and related climatic conditions, or recommend operational changes and controls. In line with the requirements of the Cyanide Code, the outcome of the study will also have to satisfy a stringent peer review process.