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Volume I of IV <br /> Exhibit G—Water Information - Project Description <br /> 4.6.3 Summary <br /> 73) The Operator's response did not satisfy the requirements of Rules 6.4.7(2)(c), 6.4.21(12), <br /> 3.1.5(10), and 3.1.6(1), because it did not adequately describe how the operation would <br /> differentiate impact to surface water quality from historic mine features versus impact <br /> from mining activities occurring under this permit. Please provide additional <br /> information that demonstrates how the operation would identify potential impact to <br /> surface water from current mining activities. <br /> RESPONSE: The sections of the Rules cited above (i.e., 6.4.7(2)(c), 6.4.21(12), <br /> 3.1.5(10), and 3.1.6(1) identify the need for water quality monitoring and development <br /> of a water quality monitoring plan and require protection of surface and groundwater <br /> from disturbed areas. Differentiating impact to surface water quality from historic <br /> mine features versus impact from activities occurring under this permit is performed <br /> through the comparison of current water quality to the historic, or baseline water <br /> quality data set. CC&V maintains records of water quality data for our monitoring <br /> locations including Arequa Gulch, Wilson Creek, Fourmile Creek and Grassy Valley. <br /> As such the monitoring plan provided in Section 11 of the Project Description that was <br /> submitted as part of Amendment 11 addresses this comment. To better clarify, CC&V <br /> is providing evidence of how CC&V complies with each of the requirements listed in <br /> the Division's comments. <br /> • Rule 6.4.7(2)(c): This section ofthe Rule states that the operator must: "Submit <br /> a brief statement or plan showing how water from dewatering operations or <br /> from runoff from disturbed areas piled material, and operating surfaces will be <br /> many eg d to protect against pollution of either surface or groundwater (and <br /> where applicable, control pollution in a manner that is consistent with water <br /> quality discharge permits) both during and after the operation. <br /> Newmont already satisfies this section of the Rule by the following programs. <br /> 1) Newmont operates and maintains a series of Enhanced Management <br /> Practices (EMPs) and best management practices (BMPs) to control and <br /> manage surface runofffrom disturbed areas. These EMPs are described in more <br /> detail in the site-wide Stormwater Management Plan and Stormwater Design <br /> Report, which were provided in the original Amendment 11 application. <br /> 2) Newmont monitors surface water and groundwater in all of the major <br /> drainages. The surface and groundwater monitoring section of Amendment 11 <br /> addresses how an impact to surface or groundwater quality of the area will be <br /> identified. These data are entered into a database and checked against the <br /> Numeric Protection Levels (NPLs) and reviewed on a quarterly basis to assess <br /> trends in groundwater and surface water quality. <br /> Page 6 of 8 <br />