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MINREC, INC. AHR PAGE 5 <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 pocket size tester (pH. Range -1.0 to 15.0 pH). Resolution 0.1 pH. Accuracy +/- <br />0.1 pH. Operating temperature 0 to 50 °C. Temperature compensation: automatic 0 to 50 <br />°C. <br />Conductivity - A pocket size EC tester. Accuracy: +/- 2% FS. Temperature compensation: <br />automatic 0 to 50 °C. Operating temperature: 0 to 50 °C. Ranges: 0 to 0 to 1,900 <br />umhos/cm and 2.0 to 19.90 mmhos/cm. <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 />Enviro-Chem or Accutest Laboratories. <br />