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Nickel (Ni).-Minor concentration of nickel was found with an increase in leachate <br />concentration over time. The 5-minute concentration was 5 µg/L and rose to 9.6 µg/L after 18 <br />hours. <br />Lead (Pb).-High leachate lead concentration was found and lead concentration rose over <br />time from 2,600 µg/L after 5 minutes to 5,800 µg/L after 18 hours. <br />Zinc (Zn).-Moderately elevated concentrations of zinc were found in the Lower Chatauqua <br />leachate, and zinc concentrations rose over time. The 5-minute concentration was 460 µg/L; <br />this value dropped to 1,200 µg/L after 18 hours <br />General Teller Mine <br />The General Teller mine is located in the Deer Creek drainage in the Snake River watershed. The <br />mine is hosted in Swandyke hornblende gneiss with pegmatite intrusions. <br />Net-Acidity <br />0.5 kg CaCO,/ton. <br />pH Trend <br />There was a slight increase in pH over time in the General Teller mine-waste leachate. pH rose <br />from 5.5 after 5 minutes to 5.6 after 18 hours. (+0.1 pH units). This indicates net-acid neutralization of the <br />leachate over time. <br />Specific Conductance Trend <br />Leachate from the General Teller mine-waste had low specific conductance with measurements of <br />3.7 pS/cm after 5 minutes, rising to 8.8 µS/cm after 18 hours. <br />Sulfate <br />General Teller leachate sulfate concentration was low and decreased over time from 5 mg/L after <br />5 minutes to 3 mg/L after 18 hours. <br />Selected Major-Element Trends <br />General Teller leachate had very minor concentration of calcium that ranged from 0.15 mg/L in <br />the 5-minute leach to 0.28 mg/L after 18 hours. Interestingly, sodium concentration dropped over time from <br />1.2 mg/L after 5 minutes to <0.1 mg/L after 18 hours. <br />Selected Trace-Metal Trends <br />Following are summaries of selected trace-element trends portrayed in the time study (5-minute <br />vs. 18-hour) of the General Teller mine-waste leachate. <br />Aluminum (AI).-General Teller leachate had low concentrations of aluminum. <br />Concentrations ranged from 146 µg/L in the 5-minute leachate and rose to 195 µg/L after 18 <br />hours. <br />Cadmium (Cd).-Low concentrations of cadmium were found with concentrations of <0.02 <br />µg/L after 5 minutes, rising to 0.91 µg/L after 18 hours. <br />Copper (Cu).-General Teller leachate had low copper concentrations and ranged from 1.0 <br />gg/L in the 5-minute leachate to 1.3 gg/L after 18 hours. <br />Hageman_SIR_2508.doc 15 7/21/2004 2:50 PM