Laserfiche WebLink
GROUND WATER <br />• Field and laboratory data collected from monitor wells MW-8, MW-10, MW-16, MW-23, <br />and MW-65 are summarized as described below. All data was collected in compliance with <br />the approved monitoring program. <br />Water quality data for all wells (except MW-8) are shown on Tables ]0, 11, 12, and l3. A <br />review of these data through the period of this report indicate that the parameters are <br />consistent with previous years. Water quality is improving slightly in wells MW-10, MW-23 <br />and MW-65. Water quality in well MW-23, with respect to pH, TDS, and EC, remains <br />consistent with previous monitoring periods. Water quality in all wells remains within <br />acceptable ranges for material damage criteria. <br />Well levels for all monitoring wells are summarized on Table 9, and water level data are <br />presented graphically for the five monitor wells on Figures 3, 4, 5, 6, and 7. Monitor well <br />completion data are shown on Table 8. A review of water levels data shows steadily <br />declining water levels at MW-10 and MW-23; seasonally fluctuating levels at MW-16; and <br />stable levels at MW-65. Well MW-8 was mined-through in 1993 and immediately went <br />"dry". Subsequent monitoring showed that the borehole had collapsed to a point 336 feet <br />below the surface. During the last monitoring of the reporting period, a water level was <br />measured at 311.9 feet below the surface. This apparent recharge of the well may be a <br />temporary condition resulting from heavy Spring precipitation, and will be substantiated by <br />future monitoring. <br />• The approved ground water monitoring program adequately monitors potential impacts of <br />mining on the ground water system. 7'he data collected through the period of this report <br />indicate that no significant ground water impacts have occurred as a result of mining. <br />n <br />