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I <br /> 8 January 1993 <br /> (GeoAudit CV 45-49C5-1. 10) <br /> Page 3 of 7 <br /> WELL COMPLETION <br /> The borings were completed as groundwater monitoring wells by the <br /> installation of 0.020 screen PVC liner from 34 to 54 feet. <br /> Bentonite pellets were used from 32 to 34 feet and the well was <br /> backfilled to the surface with Portland Cement. <br /> WELL SURVEYING <br /> The wells were surveyed relative to MW-1 and to a temporary <br /> benchmark (a concrete bumper post adjacent to the north side of the <br /> building) on 4 January 1993 . The benchmark was assumed to have an <br /> ' arbitrary elevation of 100 feet, and a survey rod and level were <br /> used to measure the elevation of the top of the well casings to the <br /> nearest .01 foot. A notch was cut into the top of the casing as a <br /> ' reference point for future measurements. <br /> GROUNDWATER MONITORING AND SAMPLING <br /> The depth to groundwater in each well was measured on 24 November <br /> 1992 . The depth was measured to the nearest . 01 foot with a <br /> Solinist water level meter. Stabilization data were collected using <br /> Orion pH, conductivity and temperature meters. <br /> After measurement of the depth, a Grundfos 2" submersible pump was <br /> 1 used to surge and purge the well. Approximately 8 gallons of water <br /> were removed from each well to stabilize temperature, pH and <br /> conductivity before collection of water samples. The water was <br /> stored in 55-gallon drums on-site. Stabilization data are <br /> summarized in Table 1. <br /> A water sample was collected from each well using a teflon bailer. <br /> Each sample was collected in two 40-m1 EPA vials and one 1-1 amber <br /> bottle. After labeling and logging, the samples were stored on ice <br /> pending transmission to WEST Laboratories. The water samples were <br /> analyzed for TPH as gasoline, TPH as diesel and BTE&X. <br /> On 22 January 1993 , a replacement sample was collected from MW-3 <br /> (for TPH as diesel analysis) . This sample was collected because of <br /> ' a possible labelling error in the laboratory. A three-stage <br /> submersible purge pump was used to surge and purge the well. <br /> Approximately 7 gallons of water were removed from the well to <br /> stabilize temperature, pH and conductivity. The sample was <br /> collected using a disposable bailer and placed in L-liter amber <br /> bottles. Stabilization data are summarized in Table I. <br /> E <br /> M <br />