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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, GW -3 and GW -9 will be monitored quarterly. <br />Field 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 />PR -02 2.05-61 12/16 <br />