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<br />MINREC, INC. ANNUAL HYDROLOGIC REPORT PAGE 2 <br />Ranges: 0 to 0 to 1,900 umhos/cm and 2.0 to 19.90 mmhos/cm. <br />Depth to Water - A Water Level Indicator (M-Scope) is used to measure depth to water. <br />' The cable is marked in 5-foot increments. A tape measure is used to determine accurate <br />distances between marked increments. <br />' Temperature - A standard mercury thermometer which measures temperature in degrees <br />Celsius or a microprocessor based pocket sized temperature tester is used. <br />' Other parameters -Samples are submitted in bottles to either Grand Junction Laboratories <br />or SOLTESCO. <br />1 SURFACE WATER QUALITY <br />' Appendix I contains the water quality information collected for North Thompson Creek. <br />The quality information taken on North Thompson Creek, in May and September, is <br />designed to monitor quality at the approximate high and low flow. <br />The variation of the quality of North Thompson Creek as it passed the mines this year was <br />similar to that which would be expected from the baseline monitoring data and the fact that <br />' the Abandoned Mined Lands peat bog water treatment system is discharging into the creek <br />between the upstream and downstream water monitoring points. <br />' GROUND WATER QUALITY <br />' The results of monitoring wells D-1 A and D-2A which are located near the toe of the refuse <br />pile are presented in Appendix II. Monitoring Well D-1A is directly below the refuse pile <br />and well D-2A is 200 feet to the west of well D-1 A. Monitoring results for prior years are <br />' summarized by quarter to make it comparable to the current monitoring schedule. <br />Graphs have been prepared which show quarterly water level and conductivity <br />' measurements for both wells. The water level measurements for the year were consistent <br />with prior years data. The conductivity measurements were also consistent with prior <br />years. The pH measurements for the wells were similar to prior years monitoring. <br />MINE FLOWS <br />' All of the water flowing into the No. 1 Mine is being allowed to flow out of the mine into the <br />treatment ponds. Measurements of the water level in the mine are taken at two valves that <br />' penetrate a concrete bulkhead in the mine portal. One of the valves penetrates the seal <br />approximately 3 feet higher than the other. The water level in the mine has been <br />maintained below the upper valve and above the tower valve during the year. Therefore, <br />' the level of water inside the mine has been stable during the year. <br />1 <br />