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1 <br />1 <br /> <br />Ll <br />1 <br /> <br />lJ <br /> <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br />Adit plug construction monitoring 4 <br />2.1 Infiltration trench monitoring <br />In accordance with Technical Revision Nos. 5 and 6, the monitoring of the infiltration trench will <br />include: <br />water quality of the influent to trench, <br />• measurement of trench influent rate, <br />measurement of trench standpipe water levels, <br />• measurement of vadose zone piezometer water levels, and <br />visual inspections of the infiltration trench. <br />A summary of each of the required monitoring measurements is provided below. <br />2.1.1 Trench influent water quality <br />While the infiltration trench is in use, monthly water quality samples of the infiltration trench <br />influent (Trench-Inlet) will be analyzed for the constituents listed in Table 2.2. The procedures <br />used to obtain these water quality samples are outlined in Attachment A. <br />Table 2.2 Parameters for Bulldog Mine water sample analyses <br />Parameter <br />Arsenic (total and diss.), mglL <br />Cadmium (total and diss.), mglL <br />Copper (total and diss.), mg/L <br />Iron (total and diss.), mg/L <br />Lead (total and diss.), mg/L <br />Manganese (total and diss.), mglL <br />Mercury (total and diss.), mg/L <br />Zinc (total and diss.), mglL <br />Lab pH <br />Conductivity @ 25°C, µmhoslcm <br />Total Suspended Solids, mg/L <br />Total Dissolved Solids, mg/L <br />Sulfate, mg/L <br />Concurrent with each monthly Trench-Inlet water quality sampling event, a measurement of the <br />pH, conductivity, and temperature of the water will be obtained in the field. <br />1 <br />