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precipitation controlled; the mine was shut down once due to a <br />• combination snowmelt-spring rain event and was re-entered when <br />dryer conditions returned. <br />A further indication of low groundwater yields is that all water <br />from the mines is pumped to the sediment pond. Sediment pond <br />flows, even in the spring of the year, are very low. <br />The quality of water pumped from the mines, for the most recent <br />reporting period, July BS-June Bb, showed the fallowing overall <br />quality ranges: <br />ph: 7.4-B.5 <br />Specific Conductance: 200-2700 uhmo/cm <br />Iron: x:0.5-1.5 ppm <br />* NPDES maximums for iron were exceeded on two occasions <br />during the preceeding permit term but prior to July 1985. <br />These data suggest the relationship between water pumped from the <br />mines and precipitation events. The high iron readings are <br />believed to be a result of low sediment pond detention times when <br />the pond was reaching full sediment capacity. <br />In conclusion, impacts to groundwater resources both on and off <br />the minesite and mine workings areas are undetectable. The <br />findings of the FHF report have been validated. <br />• <br />157 <br />