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• 4.8.5 Operational and Poslmine Monitoring <br />The following section contains the proposed montoing for surface and ground water at Trapper during <br />mining. Map M52 shows the locations of the monitoring sRes. The post-mine monitoring program will be <br />similar to the operational monitoring program. Some adjustments in the operational monitoring program <br />are expelled by the time it becomes apost- mine program. <br />4.8.5.1 Surface Water Monitoring <br />Trappers surface water monitoring schedule and parameter list can be found on Tables 4.8-11 and 4.8- <br />12, respectively. <br />A surface water monitoring program should be designed to accomplish two goals. First, to establish the <br />baseline effluent parameter levels prior to mining disturbance. By regulation, these levels are the criteria <br />which must be met by an operator prior to removal of control structures and release of bond. Second, <br />baseline effluent parameter levels are necessary for comparing against operational water quality in order <br />to measure mining related impacts. <br />To achieve the above goals, flow recording devices (either continuous or instantaneous) are used along <br />• with grab samples for TSS and SS. Samples are taken at a sufficient frequency to give a reasonable <br />indication of baseline flow and sediment load (possibly two to three times per month during the snowmeft <br />runoff season). Other parameters as described in List A and A-1 (Table 4.8-12) are sampled at the <br />frequency specified in Table 4.8-11. <br />Total iron, TSS, SS, TDS and/or conductivity, pH, oil and grease and flow are the proposed surface water <br />paremeters. These parameters are in conformance with our Colorado wastewater discharge permit CO- <br />0032115. <br />When there is a discharge from the last sediment dam in a drainage, the discharge will be sampled as <br />specified in accordance with Trapper Mine's Colorado Wastewater Discharge.Permits (see Map M52 for <br />location of mondoring sites). Monitoring sites are moved downstream slightly when additional down- <br />stream settling reservoirs are added. The flow at the time of sample collection in a gulch will also be <br />recorded. The Colorado Water Quality Control Division will be noted orally within 24 hours and within <br />five days by written report or on quarterly DMR's attar receiving the water quality results from the <br />laboratory if values exceed the discharge limits. <br />• 4-239 <br />- .P.2-~I <br />MAY 1 3 1998 <br />