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' 5.2 Ground Water Gradient <br /> A ground water gradient map was produced from the data obtained from the June 17, <br /> ' I997 sampling event (Figure 2). The elevations used in the calculation are summarized <br /> in Table 4. The ground water flow direction is toward the northwest during this sampling <br /> event. This gradient and flow direction is consistent with previous monitoring events. <br /> 1 <br /> TABLE 4 <br /> ' Monitoring Well Water Elevations - June 17, 1997 <br /> Well Well Collar Depth to Water Ground Water <br /> Number Elevation (feet) Elevation (feet) <br /> ' (feet) <br /> MW-1 57.70' 10.55' 47.15' <br /> MW-2 58.82' 11.14' 47.68' <br /> MW-3 58.22' 10.59' 47.63' <br /> MW-4 57.46' 10,41' 47.05' <br /> MW-5 57.86' 11.02' 46.84' <br /> MW-6 57.27' 10.53' 46.74' <br /> MW-7 56.15' 8.82' 47.33' <br /> MW-8 56.09' 9,01' 47.08' <br /> MW-9 56.60' 9.67' 46.93' <br /> lie 5.3 Discussion of Analytical Results <br /> Analytical laboratory data indicate a slight increase in detected constituent levels in <br /> monitoring well MW-1 as compared with the previous sampling event results. The <br /> sample collected from monitoring well MW-6 indicated a slight increase of all analytes <br /> except benzene, which remained below detectable levels. Gasoline was not detected <br /> above the detection level in MW-8 during this sampling event. The detection of gasoline <br /> in MW-8 during the previous sampling event may be related to sample collection or <br /> laboratory error. The remaining wells, MW-5, MW-7 and MW-9 each indicated non <br /> detectable levels for all analyzed constituents. These data are consistent with data <br /> obtained from previous quarterly sampling events. <br /> it <br /> 1 <br /> American Geological Services, Inc. <br /> • CA95D6-029 <br /> ' 12 <br /> 1. <br />