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<br />Table 20 Mine Water Quality at the West Elk Mine <br /> Sylvester Gulch Test <br /> West Elk Mine Water (Location E-4) Adit <br />Parameter 04/15/82 04/22/82 04/29/82 05/07/82 05/13/82 05/29/80 <br />pH 7.2 7.3 7.05 6.98 7.9 7.9 <br />TDS (mg/I) 1194 1236 1116 1216 1216 --- <br />TSS (mg/1} 4 9.6 44 15.2 4.0 --- <br />Total Iron (mg/1) 2.38 0.885 4.35' 0.075 0.48 --- <br />Total Manganese 0.725 1.07= 1.33= 0.763 0.428 --- <br />(mg/I) <br />Acidity (mg/1) --- --- --- --- --- 10 <br />Arsenic (mg/1) --- --- --- --- --- 0.002 <br />Barium (mg/1) --- --- --- --- --- 0.2 <br />Cadmium (mg/1) --- --- --- --- --- 0.01 <br />Chromium (mg/I) --- --- --- --- --- 0.02 <br />Lead (mg/I) --- --- --- --- --- 0.009 <br />Selenium (mg/1) --- --- --- --- --- 0.007 <br /> <br />Notes: <br />1. Exceeds 30 day average for NPDES Effluent Limit <br />2. Exceeds water quality standard on North Fork Gunnison River <br />alkalinity and sulfates and lo~v values of hardness that were measured. However, high <br />chloride values were found in the Bear Mine samples. No other groundwater samples <br />exhibited a high chloride level. Even with elevated chloride levels, this water exhibits no <br />acidity and is suitable for direct discharge without treatment. <br />Water Balance <br />A water balance analysis was performed in order to evaluate limitations of the baseline <br />monitoring program and to serve as a basis for comparing possible changes in water balance <br />components resulting from mining in the F seam. A primary concern with mining the F seam <br />at West Elk was passible depletion of groundwater. Estimates of changes in on-site storage <br />2.04-52 <br />