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been developed to assess the possl ble Impacts to the hydro) og lc system SdentlfLed in Tab <br />17, Probable Hydrologic Consequences (PHC). The results of the monitoring programs have <br />ar~d will continue to be employed to supp0 rt: ttie PHC conclusions that disturban.ea to the <br />hydrologic balance will be minimal and that. the potential uses of the ground and surface <br />water systems affected by mining will not be changed. <br />The parameters analyzed for at each monitor) ng site as well as satry~ling and monitoring <br />frequencies are documented In Tab 15, Hydi'ologlc Monitor) ng Program. Table LB-1 shows <br />which monitoring sites are utilized to address each of the probabl<: hydrologic <br />consequences discussed Sn Tab ll. The location of each of the monl.toring sites can be <br />seen on Exhibit 7-1 (Tab 7, Hydrologic Description). The following monitoring plan <br />discussion will address how the monitoring data or programs will be used to determine <br />impacts to the hydrologic balance. <br />Ground Water Monito ri nq Plan <br />Overburden, Wadge Coal and Alluvial Aquifer Quantity and Quality. Any' future drawdowns in <br />[he overburden, coal and alluvial aquifers will be compared against multiple year <br />pr edisturbance (baseline) water level fluctuation ranges at the proposed and existing <br />spoils, alluvial, overburden, and coal monito rl nq wells presented Sn the proposed ground <br />water monitoring program, Tab 15. Water level fluctuations as a result of irrigation, <br />natural and water quality sampling stresses have been reasonably defined. Significant <br />water level drops outside these multiple year ranges will be considered to be possible <br />effects from pi[ pumpage. <br />Mi ninq impacts on ground water quality will be compared against the multiple year baseline <br />~ monitoring ranges esta bushed for each them) cal parameter monitored at each site. Because <br />a number of variables can affect water chemistry, only slgnlf scant increases cr consistent <br />Crends will be considered as possible impacts from mi ninq. Trillnear and Schoeller <br /> <br /> <br />• <br />Sa Revised 11/10/95 <br />