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MINREC, INC. ANNUAL HYDROLOGIC REPORT PAGE 5 <br />The average flow during 2005 of 14.9 gpm with a conductivity of 1929 (2005 Ave.) <br />discharging into a receiving stream with a 5 cfs flow and a conductivity of 494 (pre-permit <br />mean) would increase the conductivity of the receiving stream to about 503 umhos/cm, an <br />increase of about 1.8% which is considered insignificant. <br />The Colorado Department of Public Health and Environment has regulations regarding <br />saline discharges into the Colorado River. A discharge of one ton of salt per day is <br />considered a no-salt discharge by the Department of Health. A flow rate of 100 gpm from <br />with a TDS concentration of 1500 mg/1 would yield a salt concentration of 0.9 tons per day, <br />slightly below the one ton per day of salt discharge limitation. The average flow rate at <br />Outfall 001 was 14.9 gpm with a TDS concentration of 1321 mg/I during 2005 which <br />equates to a discharge of 0.12 tons of salt per day. <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 thermometerwhich 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 />