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• Groundwater Information <br />A description of the ground water hydrology for Pit 1 and <br />the adjacent area is presented in the Willard Owens report found <br />at the end of this Appendix. This description includes the <br />following information: <br />(1) The depth below the surface and the horizontal extent <br />of the water table and aquifers; <br />(2) The lithology and thickness of the aquifers; <br />(3) Known uses of the water in the aquifers and water table <br />and; <br />(4) The quality of subsurface water. <br />In addition, the report contains information describing the <br />recharge, storage, and discharge characteristics of aquifers and <br />the quality and quantity of groundwater, according to the parameters <br />and in the detail required by the regulatory authority. This <br />• information was substantially obtained from slug-injection tests <br />conducted by Willard Owens Associates. The results of these tests <br />are found at the end of this Appendix. <br />Wyoming Fuel will monitor groundwater levels on a monthly <br />basis, until enough data is collected to illustrate that quarterly <br />monitoring sufficiently reflects the changes ir. the groundwater <br />system. The groundwater levels for the wells in the vicinity of <br />Pit 1 are listed in Table 12. Wyoming Fuel will also measure the <br />groundwater quality on a quarterly basis using all the parameters <br />listed in the Wyominq DEQ Guidelines. water quality information <br />from these is contained at the end cf this Appendix. <br />Recommendations were made by the Office of Surface Mining <br />Staff to install a monitoring well in the southeast corner of the <br />permit area, downdip of the pit and proposed sediment pond area <br />and to be completed in the coal. Wyoming Fuel will not be con- <br />• stri~.cting a sediment pond and the pit limits will roughly parallel <br />-i9- <br />