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Water Quality Data, Oak Creek. Surface water flow is present <br />most of the year, as shown on Table 14, with variations occurring <br />as a result of precipitation events, snowpack levels and upstream <br />irrigation diversion demands. Water quality for the period of <br />this report, as compared to previous monitoring data, indicate no <br />significant impacts due to operations at the loadout facility. <br />Conclusions <br />Southfield's required surface watec monitoring program continues <br />to monitor the impact of mining operations on the surface water <br />system at the Mine site and loadout facilities. The water quali- <br />ty data to date show no change or impact from the Mine operation. <br />GROUNDWATER <br />All data collected at monitoring wells MW-8, MW~1Q, MW-16, MW-23 <br />and MW-65 to the ending date of this report are summarized on <br />Tables 10-13, Water Quality Data; Table 9, Monitor Well Water <br />Levels; and Figures 3 through 5, Water Levels for wells. An <br />examination of the well water levels data indicates some expected <br />seasonal fluctuations, and historically a slight overall decrease <br />in the level of each well since monitoring was initiated. This <br />suggests that a gradient towards the Mine continues to occur in <br />the area of the wells due to their close proximity to the <br />underground mining operations. <br />Groundwater quality data, for the period of this report, show no <br />significant changes as compared to previous monitoring <br />information. Levels of dissolved iron in MW-10 and MW-16 have <br />varied historically over a wide range, though no long term trends <br />are appearant. Sodium Absorption Ratio levels, particularly in <br />MW=16 and MW-23, have increased but do not neccessarily indicate <br />a long term increase. Reviewing the other sample parameters <br />indicates only minor changes probably resulting from fluctuating <br />water levels and decreasing levels as above referenced. <br />Conclusions <br />The required groundwater monitoring program continues to monitor <br />the impacts of Southfield's mining operations on the groundwater <br />system in and adjacent to the permit area. The water quality <br />data show no significant change or impact from the Mine opera- <br />tion. <br /> <br />