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TRI-VALLEY GROWERS PLANT NO. 4 2 17 May 1990 <br /> REVIEW OF REVISED WORKPLAN MEMO <br /> The monitoring wells will be developed using a pneumatic pump and new polyethylene <br /> tubing until the water removed is cleared of fines or 10 well volumes have been <br /> removed. Prior to collecting ground water samples, the monitoring wells will be purged <br /> by removing at least three well volumes with either a teflon bailer or a pneumatic <br /> pump. Once turbidity, conductivity, Ph, and temperature have stabilized ground water <br /> samples from each well will be analyzed for the following: <br /> Chemical Oxygen Demand <br /> Total Dissolved Solids <br /> Nitrates <br /> Total Nitrogen <br /> Ph <br /> Electrical Conductivity <br /> The monitoring wells shall be sampled monthly and the sample frequency may be reduced <br /> once ground water quality has been characterized. Additionally, the top of each well <br /> casing will be surveyed to the nearest 0.01 foot to determine water table elevations <br /> in each well . The water level data will be used to determine the hydraulic gradient <br /> and ground water flow direction. <br /> In summary, the revised workplan is adequate and appears to be able to meet its stated <br /> objectives. The geologic, hydrologic, and water chemistry data will be integrated and <br /> presented in a Hydrologic Characterization Report which will be prepared under the <br /> supervision of a California Registered Geologist and Civil Engineer. <br /> RAE:ej <br />