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Mr. Richard Mills - 4 - June 5, 1986 <br />lands of 1-5 feet in comparison with water levels of the undisturbed land <br />north of the creek. This data is relatively comparable as both 1980 and 1985 <br />are considered high water years. Consequently, a well-developed spoils <br />aquifer is draining the tipple and reclaimed lands from Mine 3 in that area. <br />Unfortunately limited water quality data is available for that series of wells <br />to document or refute this conclusion. <br />Spring Monitoring <br />Only one of the two spring sites discharged during 1985. Site 108 <br />discharged calcium sulfate type water for 4-6 weeks in July. <br />Surface Water Sites <br />Surface water sites both up and downstream from the permit boundaries <br />were monitored as part of TCC's standard hydrologic monitoring plan. An <br />additional study was performed during the last year to understand the <br />chemistry of sources of water to the Area 2 pit and Pond D and to determine <br />the effectiveness of the sedimentation pond system. Mine discharge water is <br />currently discharged into Pond D. Pond D does an efficient job of decreasing <br />high levels of TSS, iron, aluminum, arsenic and lead from the mine discharge <br />water. Pond D is moderately effective at lowering concentration of <br />molybdenum, zinc and copper, yet the discharge occasionally exceeds receiving <br />stream standards for these metals. (See discussion on site 84, Legal <br />Requirements.) <br />Please respond to the issues discussed in the interpretation section by <br />July 18, 1986. If you have any questions, feel free to contact me. <br />Sincerely, <br />~q,`Flic 1 a.e (,v f~~ j <br />Catherine W. Begej <br />Reclamation Specialist <br />CWB/ddt <br />cc: Dan Mathews <br />Robert Liddle <br />Randy Price <br />0916F <br />