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TABLE 2-1 SURFACE WATER OUALITY PARAMETERS AND ALLUVIAL MONITORING HOLE WATER QUALITY PARAMETERS' FIELD MEASUREMENTS Discharge LABORATOR Ammonia Y ANALYSIS Potassium pH Bicarbonate Selenium* Specific Conductance Boron Sodium Temperature Calcium Sulfate Carbonate Total Suspended Solids Chloride Total Dissolved Solids Copper T otal Volatile Solids Fluoride Sodium Adsorption Ratio Iron* Lead* Magnesium Manganese* Nickel' NiVate ' Groundwater holes in Leases C-8424 and C-8425 will be sampled and analyzed for these parameters prior to entering those leases. * Total metals analyses for surface, dissolved for alluvial and groundwater are located near the bottom of the Coal and Siltstone Facies (middle zone). Water levels are measured quartedy in the fifteen groundwater monitoring holes. The water level is measured monthly in QAL-5, and samples collected quarterly to analyze for the twenty two water quality parameters listed in Table 2-1. The alluvial monitoring hole, RM-1, was drilled east (downstream) of the pond for Refuse Disposal Area 2/3 on September 28, 1989. The location of this hole is shown on Plate 1. This monitoring hole was drilled to fulfill a requirement of the mine permit. RM-1 was drilled to bedrock at a depth of 32 feet. No water was encountered during drilling. The hole was drilled with seven-inch hollow flight augers and cased with perforated two-inch PVC pipe. The hole is monitored on a monthly basis. No water has been detected in RM-1 to date. If detected, the water level will be measured and samples collected quartedy to be analyzed for the parameters listed in Table 2-1. During October 1984, the Taylor Draw Reservoir facilities were completed and the reservoir began filling with water. The area around the alluvial groundwater holes has become a shallow water mud 4