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Iron (Fe).-General Teller leachate iron concentrations were low. Iron concentrations ranged <br />from 67 µg/L in the 5-minute leachate and rose to 135 gg/L after 18 hours. <br />Manganese (Mn).-Low concentrations of manganese were found in leachate from the <br />General Teller mine-waste. Manganese values ranged from 4.8 µg/L to 22.8 after 18 hours. <br />Mercury (Hg).-Mercury was not detected in the General Teller leachate. <br />Nickel (Ni).-Minor concentrations of nickel were found in the leachate with a very slight <br />increase in leachate concentration over time. The 5-minute concentration was <0.4 gg/L, <br />rising to 0.5 µg/L after 18 hours. <br />Lead (Pb).-Leachate lead concentration was minor and rose over time from 3 µg/L after 5 <br />minutes to 12.6 µg/L after 18 hours. <br />Zinc (Zn).-Minor concentrations of zinc were found in the General Teller leachate and the <br />concentration rose over time. The 5-minute zinc concentration was 5.4 µg/L; this value rose to <br />29.8 gg/L after 18 hours. <br />Cashier Mine <br />The Cashier mine is located in the very upper reach of the Snake River. The mine is hosted in <br />Swandyke hornblende gneiss, with barite gangue, and no ankerite. <br />Net-Acidity <br />10.5 kg CaCO,/ton. <br />pH Trend <br />There was an increase in pH over time in the Cashier mine-waste leachate. pH rose from 4.7 after <br />5 minutes to 5.0 after 18 hours. (+0.3 pH units). This indicates net-acid neutralization in the leachate over <br />time. <br />Specific Conductance Trend <br />Leachate from the Cashier mine-waste had low specific conductance with measurements of 155 <br />µS/cm after 5 minutes, rising to 212 µS/cm after 18 hours. <br />Sulfate <br />Cashier leachate sulfate concentration was low and went up over time from 60 mg/L after 5 <br />minutes to 91 mg/L after 18 hours. <br />Selected Major-Element Trends <br />The leachate had minor concentration of calcium that ranged from 8.5 mg/L in the 5-minute leach <br />to 14 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 Cashier mine-waste leachate. <br />Aluminum (A1).-Cashier leachate had low concentrations of aluminum. Concentration ranged <br />from 54 pg/L in the 5-minute leachate and decreased to 28 µg/L after 18 hours. <br />Hageman_SIR_2508.doc 16 7/21/20042:50 PM