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Coca-Cola Enterprises-West <br /> USTEC job No. 90054.03 <br /> 2.3 QUARTERLY GROUNDWATER MONITORING AND SAMPLING <br /> f ,.. <br /> y i A quarterly groundwater monitoring and sampling program was initiated in December 1990 to <br /> i identify the major organic constituents and their concentrations, and to assess the potential <br /> migration path of these constituents in the groundwater throughout the site. A summary of <br /> historical groundwater elevation measurements is presented in Table 1. A summary of historical <br /> k <br /> ^� groundwater analytical test results is presented in Table 2. The analytical chemistry laboratory <br /> reports were presented in the respective quarterly reports. <br /> .a. 2.4 VAPOR EXTRACTION PILOT TEST <br /> USTEC conducted four 6 to 10-hour vapor extraction system(VES)pilot tests between November <br /> ] and 5, 1990. The VES pilot test was designed to assess the feasibility of a vapor extraction <br /> system. The pilot test results will also be used as an aid to evaluate the radius of influence for <br /> the vapor extraction system design(Section 5.3). The procedures for performing the VES pilot <br /> I w tests were derived from techniques and equipment developed by USTEC. <br /> i - <br /> 1 The VES pilot tests were conducted using vapor extraction wells VEW-1, VEW-2,VEW-3, and <br /> VEW-4. The construction details for the vapor extraction wells are discussed in Section 5.3. <br /> Figure 3 shows the location of the vapor extraction wells along with the location of groundwater <br /> monitoring wells MW-1,MW-4,and MW-5, which were used as monitoring points during the <br /> f <br /> vapor extraction pilot test. <br /> The vapor extraction test equipment consisted of a blower and muffler, associated pressure <br /> gauges,and Polyvinyl Chloride(PVC)connections and tubing connected to a portable steel skid. <br /> The skid was connected to the groundwater monitoring well with 2-inch,Schedule 40 PVC pipe <br /> u and couplings. All glues and sealants were allowed to dry and pressure checked before the test <br /> was started. <br /> s - <br /> The vacuum was generated using a 3-horsepower Roton Blower powered by a portable <br /> ! generator. A vacuum of about 50 to 65 inches of water was applied to the test well and the soil <br /> 7 <br /> 5 <br /> E , <br />