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<br />- 6- <br /> <br />The applicant refers to subsection 6.7 under "Exhibit G" page G-I. However, there is no subsection 6.7. [f the <br />applicant is referring to subsection 7, please indicate. Has CCBcV ever violated its NPDES Discharge Permit <br />parameters at Arequa and Carlton? <br />A. Under 4.6.1 1, page 11, the operator states, "due to the higher permeability of the diatreme, and the <br />lowering of the ground water table by the underground drainage tunnels, precipitation rapidly infiltrates, <br />and surface water Flows are only rarely observed. Those Flows are not continuous in the downstream <br />direction, but may become more continuous after the granodiorite is encountered. When which <br />granodiori[e is encountered? Please explain. <br />On page 59, under 5.7.1.3 Surface Water Management, the operator states, "The SGOSA diversion <br />design is discussed in Appendix 6, Volume N. There is no Appendix 6 in Volume N. Please revise <br />[he [ext. <br />C. Are there any known water rights, wells, etc., other than identified in the permit. <br />D. Under the VLF, 6.6 Water Balance, the operator states, "As a result of the increase in ore depth and the <br />solution from azeas of Phase N which will report to the existing Phase I and II PSSAs, the capacity of <br />the existing PSSAs were evaluated. The results indicated once Phase N is constructed and operational, <br />the calculated volume necessary for the PSSA for Phase I and II is greater than the available capacity <br />given the freeboard requirements. This will necessitate using the Phase I, II and III extemal pond for <br />solution storage." <br />Is the Phase I, II, and III extemal pond located below the ARD building the same as the one <br />submitted under TR-33? Are there plans to build additional ponds, other than the ones indicated <br />on the facilities Map? If yes, please provide the specific design and locations for these ponds. <br />Please submit a detailed plan and stability evaluation for the Phase N Extemal Pond, which is <br />also referenced in Section b.4.3(E). <br />E. As indicated by the operator and as calculated by the Division, without the extemal pond for Phase I, R, <br />and III, the water balance will exceed the design capacity. The operational WAD CN for the operation <br />is 150 PPM WAD CN. However, the operator has agreed to keep the WAD CN in the extemal ponds at <br />maximum 40 PPM WAD CN. Please provide a detailed water balance showing how the operator is <br />going to maintain and not exceed the 8090 operational capacity without exceeding the 40 PPM WAD <br />CN in [he extemal pond. The Division understands the time needed to kill the CN. How is CC&V <br />going to accomplish this task? Please also note that the 8090 operational capacity for the VLF can not <br />be exceeded at any given time. If it does occur, CC&V has to notify the Division within 24 hours of <br />such occurrence. <br />F. The operator has included a financial warranty for reclamation of the storm water sediment collection <br />ponds with a typical design. Since the reclamation warranty is submitted to reclaim these ponds the <br />Division will require the detailed design for these ponds [o make sure adequate warranty is in place to <br />reclaim these ponds. <br />G. Under monitoring Page 98, the operator states, "the underdrains 30-day average of CN WAD for the <br />underdrain exceeds 1.0 mg/I and the 30-day running average." This is not correct. As the operator ii <br />aware, the Division agreed to .~ mg/l maximum \VAD CN for the underdrain, due to the use of the Iron <br />Clad clay for Phase I, which was detoxified to .~ WAD CN. CC&V will notify the Division within 24 <br />hours. if the W.AD CN is exceeded and proceed with daily- sampling as approved in the condition and in <br />the even, that esceedance is not a one time only occurrence, submit a remedial plan within 30 days. <br />