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4- 17 <br />• 4.2.3 Groundwater Quality <br />Six w~ at-er sampling holes were drilled along East Salt Creek and a regular sampling program <br />was conducted there. Fluctuations are evident and holes are frequently dry. The variability of <br />data collected does not allow for an accurate analysis of seasonal variations. <br />Both surface and groundwater analysis exhibit high total dissolved solids and' can be <br />characterized as sulfate bicarbonate waters. Analysis for the period of December 1977 through <br />April 1979, shown in Tables 4.2-1 through 4.2.5, indicated that groundwater in the alluvium is a <br />sodium sulfate type containing dissolved solids ranging from 1,000 to 6,000 mg/I. <br />Groundwater quality as shown in the above noted tables was established from the sampling six <br />alluvial wells as shown on Figure 4.2-2. This figure also shows the location of wells to be <br />utilized in future monitoring as described in Section 4.2.4. These data suggest an increase in <br />both dissolved solids concentration and sodium sulfate in the downstream direction. <br />4.2.4 Groundwater Quality Monitoring Program <br />A water quality monitoring program has been established to develop additional ground water <br />• data in the area of the McClave Canyon Mine and to monitor the effect of operations upon the <br />resource. The monitoring program will consist of the following items: <br />1. Quarterly monitoring of wells GW-1 and GW-3 for Static Water Level, PH ,Temperature, <br />and Specific Conductance. <br />2. Water quality sampling of mine water discharges as required by NPDES and <br />CDOH permit. <br />3. Monitoring of all non-seep inflows into to mine to include source, quantity, <br />duration and quality (PH, Electrical Conductance, and Temperature). <br />4. Monitor quantities of water discharged from the mine, consumed in the mine, <br />and imported for use in the mine. <br />Results of the quarterly groundwater monitoring shall be submitted to the Division <br />immediately after data collection and analysis. Results of additional monitoring will be submitted <br />to the Division in an annual hydrological report. The annual report will detail inflows, discharges <br />and consumption of water within the mine and shall be structured around the normal "water year' <br />(October 1 through September 30). The report shall be submitted immediately after data <br />collecting and analysis. <br />Water samples will be collected with a bailer after the depth to water table has been <br />measured. Alf monitoring wells shall be pumped at lease once a year and at least one day prior <br />to sample collection with an air lift or a bailer. <br />M~ Volume 1 4 -29 - 96 <br />