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Water Quality Considerations <br />• Mining in Zone V, the disturbed area, should not impact ~ <br />the quality of either surface or ground waters. The <br />greatest threat to water quality is the increased sediment <br />load, which could be carried by runoff from the disturbed i <br />area. However, all runoff from Zone V cai11 be channeled <br />into the sediment control pond and will not be allowed to <br />reach Bolton Draw. Some seepage may occur from the pond <br />into the weathered bedrock aquifer. [dater in the <br />pond is derived from deeper aquifers penetrated by the <br />mine and from precipitation• It is expected to be slightly higher <br />in sodium and lower in TDS than the neaz surface waters sampled in <br />Well ~~2. Seepage from the pond will be minimal and <br />effects from such seepage will probably not be recognizable <br />• 700 ft. below the pond in Well ~E2. <br />As described in Section 779.15 and 779.16, four monitor <br />wells and two surface water ,monitoring sites will be <br />maintained. Through this monitor system, maximum and <br />minimum discharge conditions can be identified and any <br />seasonal variations in water quality will be documented. <br />This monitor program will be maintained throughout the <br />life of the mine to detect any quality or quantity changes <br />in either the surface or ground water regime as mining <br />progresses. <br />21 <br />