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hydrologic balance will be minimal and that the potential uses of the ground and surface • <br />water systems effected by mining will not be changed. <br />Ground Water Monitoring Plan <br />Introduction. The parameters analyzed for at each ground water monitoring site as cell as <br />sampling and monitoring frequencies are documented in Tab 15, Hydrologic Monitoring <br />Program. Table 18-1 shows which ground water monitoring sites are utilized to address <br />each of the relevant prnbable hydrologic consequences discussed in Tab 17. The location <br />of each of the ground water monitors can be seen on Exhibit 7-i (Tab 7, Hydrologic <br />Description). The following ground water monitoring plan discussion will address how the <br />ground water data or pro!)ram will be used to determine impacts to the hydrologic balance. <br />Overburden, Wadge Coal and Alluvial Aquifer Duantity and Oualitv. Any future draudowns in <br />the overburden, coal and alluvial aquifers will. be compared ''against multiple year <br />predisturbance (baseline) water level fluctuation ranges (see Tab 7) at the proposed and <br />existing spoils, alluvial, overburden, and coal monitoring Wells presented in the proposed <br />irrigation, natural and water quality sampling stresses have been reasonably defined- <br />Significant water level drops outside these multiple year ranges will be considered to be <br />possible effects from pit pumpage. Water level drops in monitoring cells outside the <br />projected zones of pit pumpage drawdown will not be consideredi mining related unless <br />consistent deepening trends develop that cannot be correlated to concurrent climatic <br />changes. ~~ <br />Mining impacts on ground water quality will be compared against th el multiple year baseline <br />monitoring ranges established for a number of the major chemical constituents monitored at <br />each site. Because a number of variables can affect water chemistry, only significant <br />increases or consistent trends will be considered as possibL e~ impacts from mining. <br />Trilinear and Schoeller diagram plots of well water chemistry will also be evaluated to <br />identify water quality changes or degradation trends. <br />goring Flows lend duality. Spring flows and quality changes at spring monitoring sites <br />will be compared to ranges developed from multiple-year baseline monitoring data. <br />Significant flow or quality deviations from the multiple-year ra nl9 es not explainable by -~ <br />climatic fluctuations will be considered to suggest impacts from mining. <br />b <br />ground water monitoring program, Tab 15. Water level fluctuations as a result of '• <br />