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GROUND WATER MONITORING <br />iC:`Jf:`.TMi+'f.G::u".tl.CP..L'::L"~'GCG:W:~:.`3.:.lEf~"~S.Y::::::F:F:fF:~R::,n,.:.RYSY.C'~n,'n.:C.:.<:Ch.',n.;dl::C'.'Q'~'H:Sf:R.M::R:~^~'{:i::Y. ~.^„~..5'91::3^.:'S.S~.::".:~r. `A`tiAYAYff.F VSXSYA.`1.`"+.YY.pd <br />Water levels and water quality samples were collected Cour times during the year. The frequency was <br />April, June, August and October. <br />Samples are collected a[ the following wells: <br />l 1I-10 Groundwater well established on the pad of the Upper Hubbard Creek facilities. <br />1 B-6 Groundwater well established in former power hole along Bear Creek. <br />METHODS <br />During visits to each station, water level measurements were made using aSoil-Test Indicating Depth <br />Meter with a conductance bridge. Levels were recorded from the top of the well casing and reported as <br />elevation. <br />Water quality samples were also collected tour times. Samples were obtained with a hand bailer. <br />Parameters of temperature, pH, eH and conductivity were made in the field. All sampling equipment and <br />handling procedures were wnsistent with those described in the surface methods section of this report. <br />RESULTS <br />Results oC well water measurements collected during 1986 through 1959 are presented in Appendix <br />and summarized in Table L. Graphs of major water quality parameters are also shown in Appendix 1. <br />Water level of Well H-10 remained constant during the 1988 monitoring. These elevations are essentially <br />the same as 1987 and are approximately 8 feet above those taken during 1986. Water quality also remained <br />consistent with that measured during previous samplings. The ground water is primarily asodium-bicarbonate <br />type with a high degree of mineralization (see Trilinear diagram in Appendix t). Concentrations of TDS, <br />I conductivity, alkalinity, ammonia, fluoride, boron and iron all remained elevated over each of the samplings <br />(Appendix 1). Because of the elevated sodium mineralization, [he SAR is high and may pose problems if <br />used Cor irrigation water. <br />J Water was encountered in Well B-6 for the first time during the October 1987 sampling. The water <br />level was recorded at an elevation of 5958.2. This level is approximately 60 (eet below that recorded in <br />Well H-10. From the initial water level reading in October 1987 to October 1988, the water rose 29.5 feet. <br />Such a rate would indicate that the area of well B-6 is being Booded from some other portion of the mine. <br />In addition, quality oC the water monitored during 1988 was significantly different from that sampled in <br />October 1987. The wafer exhibited a much lower mineralization, however, was still asodium-bicarbonate <br />J type water. Conductivity, TDS, alkanility and SAR were also lower. As with Well H-10, concentrations oC <br />ammonia, fluoride, boron and iron are elevated. This sudden change in water quality would indicate a surge <br />of fresh water from either a mine seal or aquifer source. <br />