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DRMS Response: These groundwater points of compliance wells must be established <br /> prior to Division approval of a mine plan that could impact the aquifers in accordance <br /> with Rule 2.05.6(3)(b)(iv). Please establish groundwater points of compliance for the <br /> western permit area at the Trapper Mine,pursuant to Rule 4.05.13(1). <br /> 16. The applicable standard at the points of compliance is the Interim Narrative Standard <br /> from Regulation 41, The Basic Standardsfor Groundwater(Reg 41). The Division does not <br /> have the authority to set standards, but it does have the authority to use historic <br /> monitoring data to determine numerical values forgroundwater quality parameters, if <br /> suitable data is available.If no data is available then the most stringentvaluesfrom <br /> Tables 1 -4 of Reg 41. (Further details of the Division's interpretation of Reg 41 isgiven <br /> in a Groundwater Monitoring and Protection Technical Bulletin published in 2019,and <br /> available via the Division'swebsite,or directly from the referencegiven below). <br /> Please formalize how the Interim Narrative Standard will be applied at the <br /> groundwater points of compliance with PR11. <br /> 17. Section 2.7.5.4b predicts potential adverse im pacts from the backfilled I and j pits to water <br /> quality in the 1s,2nd and 3rd White Sandstone aquifers Therefore,please address the <br /> following. <br /> Please provide a plan to control as per Rule 4,groundwater drainage <br /> through and out of the proposed permit and adjacent area per Rule <br /> 2.05.6(3)(b)(i) to address these impacts. <br /> b. Please provide a treatment plan for groundwater drainage from the area <br /> affected by the proposed activities and proposed quantitative limits on potential <br /> discharged pollutants subject to applicable State and Federal Laws per Rule <br /> 2.05.6(3)(b)(ii). <br /> c. Please provide a hydrologic reclamation plan addressing any potential adverse <br /> hydrologic consequences identified in the probable hydrologic consequences <br /> determination of PR11 for the 2nd and 3rd White Sandstone. This plan shall <br /> include preventative and remedial measures as necessary to prevent material <br /> damage, to minimize hydrologic impacts,to meet the performance standards of <br /> Rule 4.05,and a plan for the restoration of the approximate recharge capacity <br /> of the permit area and adjacent area in accordance with Rules 2.05.6(3)(b)(v) <br /> and(vii). <br /> This concludes the Division's adequacy review. Please address the items above and any <br /> outstanding items from the March 29, 2023 Internal Memorandum from Leigh Simmons. The <br /> Division is required to issue a decision on the PR11 application by April 7, 2023. If you need <br /> additional time to address these issues, please request an extension of the decision date. Please <br /> 2 <br />