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I <br /> Ii <br /> 1 <br /> 4 Coca-Cola Enterprises-West <br /> USTEC job No. 90054.03 <br /> extraction wells were completed with flush-mounted,water-tig�the traffic-rated <br /> was observed bywell vaults etin <br /> 3-foot square by 6-inch thick concrete pads. The completion a <br /> r. <br /> Steve Schneider of the San joaquin County Public Health Services. <br /> Groundwater Monitorin Well Develo ment <br /> 3.1.3 <br /> Groundwater monitoring well MW-6 was developed to ensure that the well screen transmits <br /> groundwater that is representative of the groundwater in the surrounding formation and to <br /> itoring well MW-6 was developed <br /> increase well efficiency. Groundwater monusing a bailer and <br /> the well and <br /> s he well <br /> surge block. Initially,about three well volumes of water was <br /> was bailedff om the well to tremove <br /> surged with a surge block. Following surging, Ovate <br /> sediment from the bottom of the well. The well was bailed until the turbidity of the discharge <br /> was determined by a USTEC hydrogeologist to be the best obtainable. <br /> All water from the development process was contained in U.S. Department of Transportation <br /> i � (DOT)approved 55-gallon steel drums until receipt of the analytical resulta. The contaminated <br /> development and purged waters were disposed using a vacuum tanker truck and transporting <br /> i to Gibson Oil and Refinery Services, Inc.,Bakersfield,California. Transportation manifests for <br /> water disposal were presented in the second quarter 1991,Quarterly Monitoring Report. <br /> 3,1,4 Groundwater Sam lin <br /> Groundwater samples were coNovember <br /> llected from groundwater monitoring well MW-6n probe) were <br /> 1990. All items used within the well(including the bailer and electronic interface p <br /> decontaminated prior to sampling in accordance with the procedures outlined in Section 3.1.7. <br /> 3.1.5 52i1 Vapor Monitorin <br /> Sail vapors were monitored in each boring with an HNU model PI-101 photoionization detector <br /> with a .2 electron volt(eV)lam For each sample interval,the lower sample <br /> (PID)equipped10F <br /> retainer was promptly removed from the drive sampler barrel and transferred to a labeled <br /> f "ziploch'style plastic bag. The sample was then disaggregated and allowed to stabilize under <br /> _ 11 <br /> 4 <br /> v �N/ <br />