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a - <br /> G <br /> t <br /> 1M2�­ <br /> d <br /> Julian Munoz HE1S5 ASSOCIATES <br /> 15 October 1987 13 <br /> 4�^ �4 <br /> level. TOC elevations relative to the manhole and depth to water data are <br /> presented in Table 2. A ground water contour map for data recorded on 11 <br /> September 1987 indicates a gentle northwest ground water gradient of .0025 <br /> ft/ft. This relatively flat gradient and the proximity of the site to the San <br /> Joaquin River and the Stockton Deep Water Channel suggest that the direction <br /> of ground water flow beneath the site may vary seasonally depending on changes <br /> in recharge conditions. <br /> • TABLE 2. Water Level Data, Safeway Meat Packing, Stockton, California <br /> Approximate Water <br /> Tog-of-Casing Depth Elevation <br /> Elevations Date to (ft above <br /> Well No. (ft. above MSL) Recorded Water MSL) <br /> MW-1 6.30 11 Sept. 87 17.37 -11.07 <br /> MW-2 6.62 11 Sept. 87 17.87 -11.25 <br /> MW-3 6.35 11 Sept. 87 17.54 -11.19 <br /> r CONCLUSIONS <br /> Laboratory analyses of 15 soil samples collected during Phases I and II <br /> indicate that only one sample, collected from a depth of 20.7 ft below grade <br /> in Boring B-2 at the southwest corner of the tank excavation, contained <br /> detectable concentrations of hydrocarbons. <br /> Hydrocarbon odors and/or positive OVA readings were detected in soil from <br /> 8 of the 12 borings drilled during Phases I and II. Concentrations of TFHC <br /> and BTX in ground water samples collected from monitoring wells were below <br /> detection. No free-floating hydrocarbons were detected during any aspect of <br /> the investigation. <br />