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l <br /> 3.2 Groundwater Sample Collection <br /> Water samples were: collected from MW-1, MW-4, and MW-5 using new disposable plastic <br /> bailers. Three 40-m1 EPA vials and one 1-liter amber bottle of water were collected from <br /> each well and transported in a chilled container to Western Environmental Science & <br /> Technology (WEST) in Davis. Each sample was analyzed for TPH as gasoline and diesel, <br /> and BTE&X in accordance with EPA methods 8015m and 602, respectively. <br /> 4.0 FINDINGS <br /> 4.1 Groundwater Elevation <br /> The relative groundwater elevations for the monitoring wells were calculated by subtracting <br /> the groundwater depth from the surveyed relative casing elevation (Table 1). Comparison <br /> of the May and September 1994 measurements indicate that groundwater at the site has <br /> dropped an average of 3.61 feet since the May monitoring. This drop in groundwater is in <br /> accordance with normal seasonal variation. <br /> TABLE 1 <br /> RELATIVE GROUNDWATER ELEVATIONS <br /> Western Lift <br /> 3430 S. EI Dorado Street, Stockton, CA <br /> Relative Depth to Groundwater Relative Groundwater <br /> Well No. Casing Elevation <br /> Elevation 2-9-94 5-31-94 9-14-94 2-9-94 5-31-94 9-14-94 <br /> MW-1 101.62 38.30 37.57 41.24 63.32 64.05 60.38 <br /> MW-2 101.62+ 38.33 37.50 41.08 63.29 64.12 60.54 <br /> MW-3 101.17} 37.54 36.89 40.43 63.63 64.28 60.74 <br /> MW-4 102.02 38.76 38.04 41.68 63.26 63.98 60.34 <br /> MW-5 101.54 38.19 37.35 40.98 63.35 64.19 60.56 <br /> r `All measurements in feet <br /> +Revised Zn5/% <br /> 4.2 Groundwater Flow Direction and Gradient <br /> As in previous quarters, there appears to be a flexure in the groundwater gradient (Figure <br /> 3). South and east of the former UST, groundwater flows to the north. West of the former <br /> Geebp i Audit 3.Ii-.1.e. L <br /> W.I.M Uri QR51 O-W1.10 V <br />