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quantities of dissolved solids will enter the overburden aquifer, <br /> elevate its TDS concentration and change its ion balance. <br />Increased permeability and ezposure of any possible tonic, <br />acid-or alkalinity-producing material. to water can result in <br />dissolution of soluble elements in the overburden. If such eater <br />enters a ground water recharge zone, the quality of ground water is <br />similarly changed. <br />The location, design and plan for mining presented under Eule <br />2.05.3 has been evaluated for impacts on ground water systems. The <br />proposed mine plan is designed to control the effects of mine <br />drainage. The analyses of overburden material net forth under Bule <br />• 2.04.6 demonstrate that there are no acid, tonic or otherwise <br />harmful materials of a soluble nature which could cause adverse <br />changes to ground water quality. In addition, ground water samples <br />analyzed for trace constituents contained no detectable amounts of <br />tout chemicals, as documented in Table 30, Ground Water Quality <br />Data. Therefore, no adverse impacts on ground water systems or <br />proposed poatmining land assn have been found in relation to tonic <br />discharges. <br />placement of sedimentation ponds on top of spoils can increase <br />the amount of water available for leaching through spoils. This can <br />cause an increase in TDS concentrations and a change in the ion <br />• balance of water within the spoils which could possibly eater a <br />2.05 - 155 <br />