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Canadian Zinc Corp. Message Board

  • nicehedges nicehedges Mar 25, 2013 10:09 AM Flag

    CZ Receives Proposed Water Quality Cond.

    March 25, 2013 06:00 ET
    VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 25, 2013) - Canadian Zinc Corporation (TSX:CZN)(OTCQB:CZICF) reports that on March 22, 2013 the Mackenzie Valley Land and Water Board (the "MVLWB" or "Water Board") issued its proposed effluent quality criteria to be included in the draft Type "A" Water Licence for the operation of the Prairie Creek Mine issued on March 15, 2013.
    The effluent quality criteria ("EQC") define how the discharge of water from the operating Prairie Creek Mine will be regulated. The purpose of the EQC is to ensure that site specific water quality objectives ("SSWQO") for the receiving water of Prairie Creek are not exceeded as a result of water discharge from the Mine. The MVLWB has proposed water quality objectives based mainly on established toxicity values using ecological risk assessments, as proposed by CZN, as opposed to objectives based on reference conditions.
    In regulating the water discharge from the Mine, the Board has proposed to initially regulate discharge based on fixed effluent quality limits, accompanied by a minimum ratio of discharge flow to creek flow, which would apply until the Company demonstrates the reliability of its proposed variable load-based strategy, and the need for it. Both the draft fixed EQC and the variable load-based approach are contained in the draft Licence, along with a process for converting to the variable load-based approach.
    Furthermore, Water Board staff concluded that two sets of fixed effluent quality limits could be established initially, with one set to be used when treated process water combined with mine water is to be discharged, and the other when only mine water is discharged.

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