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. t~. / <br />' SW31-1 (crest gage for flood events) Discontinued as of 8/11/97 <br />SW33-1 (stock pond grab sample) Discontinued as of 8/11/97 <br />' SW23-1 (crest gage for RP-1 discharge) Discontinued as of 8/11/97 <br />SW24-1 (crest gage Red Wash) Discontinued as of 8/11/97 <br />' 2.1.2 Ground Water Monitoring Program <br />' The Deserado Mine groundwater monitoring program consist of monitoring water depths and <br />water quality from bedrock strata, the White River alluvium and the alluvium of the Red Wash <br />' tributary north of Refuse Disposal Area 2/3. Bedrock hydrology monitoring is conducted at 26 <br />bedrock wells on eleven (11) locations while alluvial hydrology monitoring conducted at two <br />locations -the one remaining after Kenney Reservoir was filled (QAL-5) and the alluvial <br />' monitoring hole RM-1 near the refuse disposal areas. The locations of each of the groundwater <br />monitoring sites are shown on Plate 1 in the pocket of this report. Bedrock monitoring consist of <br />' collecting hydrologic data from monitoring holes and multiple completions at each location in <br />order to monitor three zones: the Upper Sandstone Facies; the Coal and Siltstone Facies; and <br />the Lower Sandstone Facies. The Upper Sandstone Facies, coal and Siltstone Facies, and <br />' Lower Sandstone Facies are referred to as upper, middle and lower respectively as a matter of <br />simplicity. The Deserado Mine coal seams are located near the bottom of the Coal and <br />Siltstone Facies (middle zone). Water levels were measured in the 28 groundwater monitoring <br />piezometers according to the schedule in Appendix A. The water level is measured monthly in <br />QAL-5, and samples collected quarterly to analyze for the twenty two water quality parameters <br />' listed.in Table 2-1 <br />' The alluvial monitoring hole, RM-1, was drilled east (downstream) of the pond for Refuse <br />Disposal Area 2/3 on September 28, 1989. The location of this hole is shown on Plate 1. This <br />monitoring hole was drilled to fulfill a requirement of the mine permit. RM-1 was drilled to <br />' bedrock at a depth of 32 feet. No water was encountered during drilling. The hole was drilled <br />with seven-inch hollow flight augers and cased with perforated two-inch PVC pipe. The hole <br />' was monitored on a monthly basis during the water year and no water was detected. <br /> <br /> <br />1 <br /> <br /> <br /> <br />3 ~l/~~t ~ <br />