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<br />' 1.2 Monitoring Information <br />The hydrologic monitoring parameters and the schedules for the hydrologic monitoring <br />programs are presented in section 2. The parameters and schedule were changed in 1994 per <br />Technical Revision No. 20. <br />Field pazameters for groundwater are depth to water level, pH, conductivity, and <br />' temperature. Field pazameters for surface water are flow, pH, conductivity, and temperature. <br />Equipment and methods used to measure the field pazameters include: <br />• Depth to water level - A cable mazked in increments is lowered into the groundwater <br />monitoring well until electrical continuity is reached at the water surface. <br />• pH - A Cole Panner pHTestr 2 pocket-size tester is used to measure the pH of a water <br />sample. Published specifications for the pHTestr 2 aze range: pH - 1.0 to 15.0, <br />resolution: 1.0 pH, accuracy: +\- 0.1 pH, automatic temperature compensation: 0 to 50 <br />degrees C, calibration points 1, 2, or 3. The pH tester was calibrated prior to sampling <br />events using the 2 point method. The expected pH was bracketed by the pH of the <br />calibration solutions. In most cases the pH tester was calibrated to 7 and 10 which <br />brackets all of the current monitoring results. If an expected pH is less than 7, the pH <br />tester will be calibrated at 4 and 7. <br />• Conductivity - A Cole Palmer pocket-size TDSTestr 20 with dual range capabilities is <br />used to measure the conductivity of a water sample. Published specifications for the <br />TDSTestr 20 are range 0 to 1990uS with resolution 10 uS and 2.0 to 19.90 mS with <br />resolution 0.1 mS, accuracy: +\- 2% full scale, automatic temperature compensation: 0 to <br />50 degrees C, calibration with standazd solutions. The conductivity tester was calibrated <br />prior to sampling events with calibration solutions in the expected range. The TDSTestr <br />3 and the TDSTestr 4 are used as a back up to the TDSTestr 20. Published specifications <br />for the TDSTestr 3 aze range: 0 to 1990 uS, resolution 10 uS, accuracy: +\- 2% full scale, <br />automatic temperature compensation: 0 to 50 degrees C, calibration with standard <br />solution. Published specifications for the TDSTestr 4 are range: 0 to 19.90 mS, <br />resolution: 0.1 mS, accuracy: +\- 2% full scale, automatic temperature compensation: 0 to <br />50 degrees C, calibration with standard solution. <br />• Temperature - A standard mercury thermometer that measures temperature in degrees <br />Celsius is used. <br />• Flow -The flow is measured in four different ways. The first method is to utilize a <br />known culvert size combined with the depth of flow and the velocity determined by <br />measuring the time it takes a floating object to travel a known distance. The second <br />method is to time flow into a bucket of known size. The third is to measure the length, <br />width, depth, and the velocity of a stream of water. The fourth way, used to find the flow <br />of the North Fork of the Gunnison, is obtained from the nearby USGS gauging station. <br />Water samples from groundwater wells H-10 and B-6 are taken with a bailer that has a <br />restricted inlet. The bailer is weighted so it sinks to the bottom of the well when it is empty. The <br />water flows into the bailer slowly so a sample of the water from the bottom of the well is <br />obtained. It is not possible to purge wells H-10 and B-6 because they are connected to the <br />flooded mine workings. Water samples from groundwater wells SC-1, SC-2, and SC-3 are <br />