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The monitoring study will provide <br />preliminary technical information needed to <br />describe the existing environment, design a <br />water resource program to meet project water <br />demand and provide technical information to <br />quantitatively address potential impacts due <br />to mining activities. <br />Regional hydrogeologic data will be <br />reviewed in conjunction with site specific <br />information from installed monitoring wells <br />to describe the overburden, the coal and the <br />underburden. The lateral extent and <br />continuity of those aquifer systems is fairly <br />well documented for the coal and <br />underburden. The random nature of the <br />perched systems in the overburden may <br />preclude the accurate definition of this <br />aquifer as well as increasing the complexity <br />of determining the impact of mining on the <br />overburden. Each hydrologic unit will be <br />examined for water supply utilization. <br />Initial information indicates that ground <br />water in all of the water bearing units is <br />suitable for stock water supplies and in some <br />areas could be used for domestic use. The <br />aquifers exhibit high TDS and sulfate <br />concentrations and high SAR's. <br />Laboratory Ana/vsis <br />Sampling procedures and protocols will <br />be developed to follow recommended EPA <br />sampling protocols and QA/QC procedures <br />which are available for regulatory agency <br />review. <br />Alluvial Valley Floor Determination <br />From the data reviewed, it appears that <br />the project area is not within a designated or <br />potential alluvial valley floor (AVF) area, <br />however, a determination of AVF will need <br />to be presented in the permit application. To <br />establish a baseline water quality database, <br />shallow wellpoints will be installed in the <br />ephemeral drainages both upgradient and <br />downgradient of the proposed facility areas. <br />11 <br />