2018-03-30_PERMIT FILE - C1981038A (2)

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Base line data for the alluvial wells MW -1, MW -2 and MW -3 are included in Exhibit 3 Baseline Water Monitoring Data. Field parameters for groundwater are depth to water level, pH, conductivity and temperature. If surface water monitoring points are added to this monitoring plan, field parameters for surface water will be flow, pH, conductivity and temperature. Equipment and methods used to measure the field parameters include: pH - A Cole Parmer pocket-size tester (pH Tester II). Range - 1.0 to 15.0 pH. Resolution: 0.1 pH. Accuracy: +/- 0.1 pH. Temperature compensation: automatic 0 to 50" C. Calibration: 1, 2 or 3 point. Conductivity - Two Cole Parmer pocket-size microprocessor - controlled testers with different range capabilities (TDS Tester 10 and TDS Tester 20). Accuracy: +/- 2% FS. Temperature conmpensation: automatic 0 to 50" C. Operating temperature: 0 to 50" C. Range 0 to 1,990 and 2,000 to 19,900 umhos/cm. Depth to Water - A Water Level Indicator (M -Scope) is used to measure depth to water. The cable is marked in 5 -foot increments. A tape measure is used to determine accurate distances between marked increments. Temperature - A standard mercury thermometer which measures temperature in degrees Celsius and a Cole Parmer microprocessor -controlled tester (Temptester). Range: -28 to 1500 C. Resolution: 10 C. Accruacy: +/-1 % FS. Dissolved oxygen - Horiba Model U-7, membrane type with automatic temperature compensation to 0 to 400 C, galvanic cell 0 to 20 ppm +/- 1.0 ppm. The electronic water monitoring instruments may vary. However, the stated accuracy of the instruments will be equal to or greater than that listed above. The pH meter and the conductivity meter are calibrated prior to all sampling events. The pH meter is calibrated using the 2 - point method. The expected pH is bracketed by the pH of the RN -07 2.05-42 03/18