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Alluvial Ground Water Dry Creek alluvial ground water in the area down - gradient <br /> from the main surface disturbance of the Loadout can be classified as Limited Use and <br /> Quality" based on natural TDS concentration being consistently above 10,000 mg/1 in <br /> alluvial ground water well HGDAL-3. Ground water classified as "Limited Use and <br /> Quality" has limitations for only radioactive or organic pollutants. The Loadout is not <br /> likely to generate significant amounts of radioactive or organic pollutants; therefore, the <br /> operation does not have the potential to negatively impact the quality of ground water in <br /> the Dry Creek Alluvium. <br /> Bedrock Ground Water The Loadout does not have the potential to negatively <br /> impact bedrock ground water quality due to the fact that any leachate originating from <br /> the Loadout would lack sufficient hydraulic head to significantly invade the bedrock <br /> unit underlying the area(low permeability Lewis shale). This marine shale confines <br /> aquifer units in the underlying Mesaverde Group (Scott and Kaiser, 1994, Hydrologic <br /> Survey Resources Series 30, page 63). Several hundred feet of Lewis shale separate the <br /> Loadout from the deeper Mesaverde Group. As a loadout(rather than a mine), the <br /> operation will have no deep excavations or deep impoundments where water could <br /> develop significant hydraulic head. In addition, any leachate originating at the Loadout <br /> would likely be of better quality than native ground water in the Lewis shale which has <br /> high concentrations of dissolved solids. <br /> Surface Water Monitoring Plan <br /> 2. The applicant has conducted, and will continue to conduct, monitoring of surface <br /> water in a manner approved by the Division. The current monitoring regime began <br /> in 1985 one year before shipments ceased at the Loadout, was submitted under Rule <br /> 2. 05. 6(3)(b)(iv) and consists of the following 4.05. 13(2)): <br /> Two surface sites are monitored in the spring and fall to sample high (snowmelt) and <br /> low water(base flow) conditions. Sites HGSD 1 and HGSD3 were planned to sample <br /> conditions upstream and downstream of the loadout, respectively, along Dry Creek. The <br /> list of parameters sampled is found in Table 13- 1 of Tab 13. <br /> In addition to the monitoring discussed above, the operator is required to monitor <br /> discharges from two NPDES discharge points (sediment ponds) as required by the <br /> mine's NPDES permit. <br /> H. Transfer of Wells <br /> No transfer of wells is proposed. Monitoring wells HGDAL3 and HGDAL4 will be <br /> reclaimed prior to bond release (4.05.14). <br /> I. Discharge of Water into an Underground Mine <br /> No surface water will be discharged into underground mine workings (4. 05. 15). <br /> 19 <br />