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• conductivity for Dissolution Surface aquifers during recompletions, and that was <br />how final sampling depth was selected. Table 6-4 summarizes water quality data <br />after completion. Data for the Dissolution Surface well continues to reflect <br />mixture of water. B-Groove and A-Groove aquifers are becoming more <br />characteristic of these aquifers, found at other monitoring locations, with moderate <br />TDS (= 912 mg/1-, conductivity (1200-1400), SAR (32-48) but high fluoride 113- <br />24 mgll- and pH (8.9-10.01. The Perched aquifers are becoming more <br />characteristic of other Perched aquifers. The most recent well IRI-5 was <br />completed at a more shallow depth than IRI-8, and is more characteristic of <br />Perched aquifers. <br />No water quality effects are evident from mining activity other than recompletion <br />action. <br /> <br />Water level data collection began in February, 1991, except most recent well <br />IRI-5. See Figures 6-7 and 6-8 for initial (March, 1991) and recent iSeptember, <br />1991) water level plots. The following table summarizes potentiometric water <br />level data (from ground surface) for monitoring wells down-dip of mining activity: <br />A uifer Initial Level-Feb. Recent Level - Seot. Chan e <br /> <br />Dissolution Surface 406' 416' -10' <br />B-Groove 399' 401' -2' <br />A-Groove 410' 414' -4' <br />Perched (IRI-8 only) 329' 303' +26' <br />In summary, the Dissolution Surface aquifer with historically the lowest <br />• potentiometric water level, is seeking equilibrium following recompletion. The <br />64 <br />