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' k'■ KLEIN FELDER <br /> ' 3 SCOPE OF WORK <br /> ' This work plan presents the proposed scope of work to install and sample three onsite <br /> ' ground water monitoring wells. Samples from the wells will be analyzed to assess Baseline <br /> ground water quality beneath the site. The baseline ground water quality will then be used <br /> ' to evaluate the impact of chloroform contaminated ground water from the Georgia-Pacific <br /> facility (east of the Harvest Glen site). <br /> ' 3.1 DRILLING PROCEDURES <br /> Three soil borings will be drilled and monitoring wells installed at locations shown on Plate <br /> 3. The location of the wells will be selected by the Jonathan Group to reduce the impact of <br /> ' well locations on development activities. The spacing of the three monitoring wells across <br /> the site will be located to assess the flow direction and gradient of ground water beneath <br /> ' the site. Based on regional data collected in spring, 1987 by the San Joaquin County Flood <br /> Control and Water Conservation District, ground water at the site is anticipated to be <br /> approximately 50 feet below ground surface and flowing generally north. <br /> ' The borings will be advanced with a truck-mounted drill rig equipped e ui ed with 10-inch hollow <br /> ' stem augers. During the drilling, an experienced environmental geologist will classify the <br /> soil, collect samples and log the boreholes. Soil samples will be collected at 5-foot intervals <br /> ' to the bottom of each boring for lithological control. Drill cuttings from the vadose zone <br /> (soil above the first encountered ground water) are assumed to be non-contaminated and <br /> ' will be discharged onto the ground. Soil cuttings saturated with ground water will be <br /> containerized in Department of Transportation (DOT) approved 55 gallon soil drums and <br /> stored onsite pending the results of water analyses. <br /> ' Since the purpose of this project is to assess baseline water quality beneath the site, the <br /> ' ground water below the site may or may not be contaminated. Soil cuttings mixed with <br /> contaminated ground water would be considered contaminated. Analytical results of <br /> ' ground water samples will be used to assess whether the containerized soil cuttings are <br /> contaminated. If contaminated, the soil would be disposed in accordance with state and <br /> 1 <br /> 129-88-1378 3 <br />