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Individual samples were obtained from the Tailings Pond No. 4 <br /> pump back pond and the peat stockpile drainage ditches on December <br /> � � . 1987 in order to help determine the source of drainage collecting <br /> in the peat pile drainage ditches . These ditches were originally <br /> con-structed to drain the high unconfined water tatle in the alluvium <br /> and adjacent glacial moraine before relocation of Highway 110 . The <br /> data show a 53 percent increase in TDS from the pump back pond to the <br /> water in the drainage ditches , demonstrating the water to be at least <br /> in part of different sources . The natural ground waters emitting in <br /> these ditches is higher in dissolved solids than she tailings water <br /> (Table 6 ) . Once again the majority of this increase occurs as <br /> ca_cium and sulfate. Dissolved metal concentrations are similar <br /> be-ween the two sites ; however, zinc is elevated in the pump back <br /> pond relative to the drainage ditches , again indicating that the two <br /> wa ers are of different sources . <br /> Seeps nos . 1 and 2 at the American Tunnel were not monitored <br /> during 1987 . Before equipment were available to monitor the very low <br /> flows present during the spring, the flow rate had dropped below <br /> detectable limits and Seep no . 2 was reduced to a small standing pool <br /> of water. Without adequate throughput of water the water quality in <br /> the pool cannot be related to ground water seepage, direct rainfall <br /> inputs, or runoff. It was therefore felt to be inappropriate to <br /> sample this site. Since that time the seep has been covered by <br /> deposited waste material and the site is no longer accessible. <br /> -3 4- <br />