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• Measurement of field parameters (temperature, specific conductance and pH) will be taken using standard instrumentation which will be periodically calibrated to ensure accuracy. Water quality samples will be preserved according to accepted procedures and samples will be delivered to the laboratory within the accepted holding times. Ground Water Monitoring Ground water monitoring will be conducted to detect the effects of mining on ground water quality and quantity. Ground water will be monitored in the mine plan and adjacent areas with the bedrock, alluvial, and spoil wells listed in Table A, Hydrologic Monitoring Sites and as shown on Map 4b, Hydrologic Monitoring Program. The completion summaries for the specified wells are presented in Table C, Monitoring Well Completion Data. Bedrock wells will be monitored semiannually for water level, field parameters, and full suite analysis. • The Foidel Creek alluvial well 008-AV-2 will be monitored monthly for water level and field parameters while a full suite analysis will be conducted quarterly. Alluvial Well 008-AV-1 will continue to be monitored monthly for water level and field parameters only. For the spoil wells 008-SP-4a and 008-SP-Sa, field parameters and water level will be measured quarterly and a full suite analysis will be conducted semiannually. Table B, Hydrologic Monitoring Parameter List, describes the constituents to be analyzed for the respective sites. When water levels are obtained from the Foidel Creek alluvium wells, the water level of the stream will also be determined using b staff gauge. The staff gauge was surveyed following installation to ensure an accurate assessment of the stream elevation. During the late fall and winter months, snow and ice buildup on the stream or measuring devise preclude an accurate assessment of the stream elevation. For this reason, stream water levels are generally obtained from late March/early April through September.- • MR 90-10 Ex. 15-2 Revised 05/03/90