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MINREC, INC. ANNUAL HYDROLOGIC REPORT PAGE 6 <br />• METHODS <br />The following narrative explains the methods used to perform water monitoring: <br />Flow - Flow is determined at discharge points by timing flow into a bucket of known volume. <br />pH - A Cole Parmer pocket size tester (pH. Range -1.0 to 15.0 pH). Resolution 0.1 pH. <br />Accuracy +/- 0.1 pH. Operating temperature 0 to 50 °C. Temperature compensation: <br />automatic 0 to 50 °C. <br />Conductivity -One Cole Parmer TDS Testr 20 pocket size tester. Accuracy: +/- 2% FS. <br />Temperature compensation: automatic 0 to 50 °C. Operating temperature: 0 to 50 °C. <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 />Rev. 6/00 <br />