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2.05.6 Mitigation of the Impacts of Mining Operations <br /> (b)(iv) Hydrologic Monitoring Plan <br /> The following monitoring plan is designed to provide data which will <br /> verify the operation will not have significant adverse impacts on the <br /> surface or subsurface water which is within or adjacent to the <br /> permit area. The hydrologic monitoring locations, shown on Figure <br /> 4.2-2 are: <br /> Alluvial wells GW-1 and GW-9 will be monitored quarterly. Field <br /> parameters will be measured each quarter (pH, conductivity, <br /> temperature, depth to water). A full suite sample will be obtained <br /> annually in the spring except when the mine is in temporary <br /> cessation. During temporary cessation, alluvial well monitoring will <br /> be required during the second and fourth quarters. <br /> Surface water monitoring stations SW-1 and SW-8 will be <br /> monitored quarterly for field parameters (pH, conductivity, <br /> temperature, flow). A full suite sample will be obtained quarterly. <br /> Water quality samples will be taken at surface monitoring stations <br /> SW-2 and SW-5 twice a year; once during spring snow melt and <br /> once during a storm event, if water is available to sample at time of <br /> water sampling. Flow will be taken at SW-2, if water is available at <br /> time of water sampling. Baseline data for SW-1 and SW-8 can be <br /> found in Table 4.2ii . Baseline data for SW-2 & 5 can be found in <br /> Table 4.2-7. During temporary cessation, surface water monitoring <br /> will be required during the second and fourth quarters. <br /> The sediment pond will be monitored in accordance with CDPS <br /> discharge permit requirements. In addition to pond discharge <br /> monitoring, the new discharge permit requires monitoring of any <br /> discharge from the silt fence located at the soil pile and the silt <br /> fence located near the bridge spanning east salt creek, north of the <br /> haul road and east of the bridge. Monitoring the integrity of the silt <br /> fences is also required. <br /> Water samples are typically analyzed by ACZ Laboratories, Inc. of <br /> Steamboat Springs, or Accutest Laboratories of Wheat Ridge for <br /> the following parameters. <br /> TR-18 2.05-61 05/18 <br />