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31 March 1998 <br /> AGE-NC-96-0235 <br /> Page 4 of 4 - - <br /> 11 Place auger returns on plastic sheeting and place nnseate in 55-gallon DOT drums and store <br /> on-site Disposal alternatives will be evaluated based on results of laboratory analyses <br /> 12 Duel complete two bonngs'as ground water monitoring wells Five feet of 0 020-inch slotted <br /> PVC screen will be installed from 45 to 40 feet bsg with blank PVC casing extending to the <br /> surface A second section`ofslotted PVC im11 be installed from 30 to 10 feet bsg with blank <br /> casing extending to the surface The proposed duel completed monitoring well construction <br /> ` is illustrated in Figure 3 <br /> 13 Single complete one boring as a ground water monitoring well using 20 feet of 0 020-inch I <br /> slotted PVC screen from 30 to 10 feet bsg with blank casing extending to the surface The <br /> proposed single completed monitoring well construction is illustrated in Figure 4 <br /> -42 GROUND WATER SAMPLING <br /> 1 Survey the top of each well casing to the nearest 0 01 foot relative to existing monitoring <br /> wells <br /> 2 No sooner than 72 hours after installation, measure to the nearest 0 01 foot, the static water <br /> • level in each monitoring well I I _ I <br /> 3 Using a submersible pump or dedicated bailer, surge and purge each monitoring well At <br /> Ieast three well volumes of water will be removed from each well to stabilize temperature, <br /> pH, and conductivity, stabilization parameters will be measured at regular intervals during <br /> purging <br /> 4 Collect ground water samples from each well using disposable bailers, samples will be <br /> collected in 40-m1 VOA vials and 1-liter amber bottles r fi <br /> 5 Label and log water safnples on a chain-of-custody form <br /> 6 Store the samples in a chilled container and transport under chain-of-custody to a state- <br /> certified,laboratory for analysis Ground water samples will be analyzed for TPH-g, TPH-d, <br /> BTE&X with MTBE and oxygenated compounds m accordance with EPA Methods <br /> 8015m/5030, 602,-8020 and 8260 <br /> 7 Store purged water in 55-gallon DOT drurris on-site pending analytical results <br /> 43, REPORT PREPARATION <br /> Upon completion of sampling and Iaboratory analyses, a report detailing the results of the work will, <br /> be prepared The report will be in a'format acceptable to the PHS-EHD The report will be reviewed , <br /> and signed by a California Registered Geologist - <br /> Advanced G coEn%iron mental,Inc <br /> r <br />