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mg/l. Comparison of :9 E5 and 1956 field parameters shov; no signif irznt change. A TDS <br />value tnat hicr. must be attributed to localized geochemical conditions anc not to mining <br /> <br />I \~ <br />impacts. Such conditions may exi st~ to a lesser decree ac Cow Lamp Creek alluvial well <br />GW-546, <br />~, Natural Springs ¥1, c", and 3 <br />These spri nqs all exist along the Northwest Diversion Ditch (see Exhibit i-? of 1966 <br />Seneca II Fermit Renewal) in a pre-law mining area. Review of Table 24 shows Spring <1 to <br />be a calcium bicarbonate type water with a relatively low TDS value. Just downstream, <br />Spring #2 is a calcium/magnesium sulfate type water with an increased TDS value. Due to <br />their location, it is unlikely that ei ttrer spring is impacted by mining. The last time <br />that flow in the fall was noted at Spring ¥3 was in 1984. <br />3. Spoils Springs ".1 and 2 <br />Both these spoils springs are located above the NPDES 004 pond. Spoils Spring ¥1 is a <br />laroe spring that flows directly into the pond. Revien of Table 24 shows this spring to <br />be a calcium sulfate type water. Spoils Spring #2 is a small spring creek in reclaimed <br />land that flows into Spoils Spring #1. In September 1986, Spoil Spring z2 contributed 1.4 <br />percent of the flow of Spoils Sprino ¥1. <br />Upon reouest of the CMERD, the following monitoring prooram revision was ir.i bated in the <br />summer of 1986. Spoils Spring No. 1 ("004 Spring"), when "Cow Camp Creek" is flowing <br />below surface station SY.'-52-6, is monitored biweekly for flow and field parameters <br />(temperature, pH, and specific conductivity). <br />In addition, site SW-52-6 is monitored for flow and field parameters immediately before or <br />after the measurements are made at Spoils Sprino No. 1 ("004 Spring"). In late June, <br />Spoils Spring No. 1 ("004 Spring") is sampled for the full suite of ground rvater quality <br />parameters. <br />Ouring periods when "Cow Camp Creek" is not flowing below surface station SW-52-6, <br />monitoring of Spoils Spring Nc. 1 ("004 Spring") is monitored monthly for discharge, <br />temperature, specific conductivity, anc pH. <br />A complete discussion of this study may be found in the 1986 Seneca II Permit Renewal. In <br />records to sampling on September 3, 1966 (a fairly representative baseflow period), Spoils <br />51 <br />