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<br />Mr. David Berry <br />October 4, 1988 <br />Page 10 <br />Well 009-79-4 - <br />This well indicates elevated values for not only iron, but also cadmium <br />and manganese. Sulphate measurements also indicate high values. <br />Well 026-79-4 and 026-79-6 - <br />Relatively high manganese levels have been recorded at both of these <br />sites. ~~ <br />CYVCC RESPONSE: <br />Well 006-82-74C - <br />No other water quality data exists for this well. <br />Well 009-79-4 - <br />The data has been reviewed again, and CYCC's interpretation indicates high <br />levels of cadmium are not typically reported for this well. Cadmium has <br />been detected in only 2 of 13 samples; once at 5 Og/1 (1982 detection limit) <br />and 0.3 ug/1. In reference to iron, it is CYCC's opinion that this well <br />does not exhibit high iron concentrations. The first sample in 1981 did i„5`'~ <br />measure 2830 ug/1; however, since that time the highest concentration (-~ d°` <br />measured has been 530 ug/1. A review of the data indicates a general trend ~~aY <br />of decreasing iron concentrations. The elevated initial concentration may <br />have been associated with the method in which the well was developed. The <br />data does not indicate high manganese concentrations, all concentrations are <br />15D ug/1 or less, and of the 16 samples 12 of them have a concentration of <br />80 ug/1 or less. The sulphate concentrations are relatively high, but a~ <br />consistent with the predicted mine impacts. <br />We11 026-79-4 and 026-79-6 - <br />In reference to Well 026-79-4, it does not exhibit high manganese <br />concentrations. The highest concentrations measured was 350 ug/1, and only <br />one other concentration being reported at 100 ug/1. Beginning in 1984 the p <br />concentration has not exceeded 40 ug/1. <br />In reference to Well 026-79-6, it does not exhibit high manganese <br />concentrations. The highest concentration measured was 610 ug/1, and only <br />four other concentrations exceeded in ]00 ug/1 since sampling was initiated <br />in 1979. <br />CMLRD CONCERN: <br />Spoil Wells <br />Five spoil wells are monitored; two are monitored for water level only, and <br />three are monitored for water level and water quality. <br />