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<br />Mr. David Berry <br />October 4, 1988 <br />Page 11 <br />As indicated within the Annual Hydrology Report, the samples retrieved from <br />these wells have relatively high total dissolved solids, electrical <br />conductivity and sulphate values. Manganese values are also elevated. <br />Relatively high iron values are also observed, and dissolved cadmium values <br />equaled the receiving stream standard for total cadmium at wells 026-SP-1 <br />and 026-SP-3 for the January 1987 analyses. Elevated nitrite was measur~ <br />for well 026-SP-3, also for the January 1987 sample. <br />CYVCC RESPONSE: <br />The spoil wells have been monitored since 1985, and the concentrations <br />measured for the various parameters are within the range of concentrations <br />expected for spoil wells. <br />CMLRD CONCERN: <br />Alluvial Wells <br />Six alluvial wells are monitored; three in the Foidel Creek alluvial <br />deposits, and three in the Fish Creek alluvial deposits. <br />Fish Creek Wells - <br />All of the wells indicate relatively high total dissolved solid and <br />electrical conductivity levels. The data indicate a possible increasing <br />trend for electrical conductivity and total dissolved solids at well <br />006-AW-2. As discussed in the ANR, iron and manganese levels are <br />consistently high. Elevated cadmium levels are observed at Well 006-AW-2. <br />It should be noted that the nitrate value for the April 1987 analysis <br />exceeds the value for combined nitrate and nitrite, which indicates a <br />probable analytical problem. Please review this problem and correct th~./ <br />analytical process as necessary. <br />Foidel Creek Wells - <br />All of these wells indicate elevated electrical conductivity and total <br />dissolved solids. Electrical conductivity seems to be increasing over <br />time. Low flow may or may not explain this trend. Additional analysis of <br />this possible trend will be conducted. Sulphate is relatively high for all <br />wells. Iron, manganese and cadmium also exhibit elevated values. Elevated <br />selenium values were observed at all wells for the October 1984 analyses <br />This may indicate an analytical problem. <br />Other possible problems identified are as follows: <br />a) The total dissolved solids value for the Well 001-5-5, April 7/U <br />1984 analysis seems to be in error; and ~ <br />b) The lead value (Well 001-5-5; October, 1982) is possibly a data `6' <br />entry error. <br />These values should be checked and corrected as necessary <br />