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1 and 2, respectively) is shown for the period of October, 1992 <br />• through December, 1993. The levels declined after the area was <br />undermined and subsided. The monitoring indicates that the wells <br />are started to recover during December. Continuing monitoring of <br />the wells will determine if this trend will be observed in 1994. <br />Water Quality <br />As presented on tables 1 through 7 for well GWB-1 the water quality <br />does not show any significant impact from the undermining and <br />subsiding of the Fish Creek AVF study area. Likewise, as presented <br />on tables 8 through 14 for well GWB-2 the water quality does not <br />show any significant impact from the undermining and subsiding of <br />the Fish Creek AVF study area. <br />ALLIIVIIIM <br />Alluvial sediments are monitored in the Fish Creek valley through <br />the alluvial valley floor study area. A combination of both <br />monitoring wells and piezometers are used to monitor water levels <br />and quality within the study area. <br />Water Levels <br />The water levels measured in the various wells during the period of <br />July 22, 1993 through December 31, 1993 are presented on figures 3 <br />• through 11. Alluvial wells GWA6 and GWAP7 showed the impacts of <br />subsidence, as both water levels and the well datum were lowered by <br />the undermining of this area. However, as reported in the 2nd <br />Half, 1993 Subsidence Monitoring Report the wells did not appear to <br />show any dewatering of the alluvium. The wells continue to show <br />seasonal variability as is typical for the all of the alluvial <br />wells monitored by TCC. Please refer to the subsidence report for <br />the pertinent subsidence and well measuring point data. <br />water Quality <br />Well GWA1 did not show any significant changes due to mining <br />activities within the study area during the year. The alluvium <br />shows the typical seasonal variations it relates to total dissolved <br />solids. This occurs as a result of spring runoff recharging the <br />alluvium during the spring period, and the runoff typically has <br />lower dissolved solids concentrations than the alluvial water. As <br />is shown on the table the alluvial water is dominated by calcium <br />and is a bicarbonate water. Likewise, sulfate ions dominate the <br />alluvial water. <br />The elevated iron and manganese concentrations are associated with <br />the high total suspended solids found in the well. During the <br />bailing of the well the sediments which settle in the bottom of the <br />well are mixed in the well water and picked up during sampling. <br />Iron and manganese are associated with these sediments. The water <br />• 2 <br />