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� 1 <br /> r <br /> TABLE 2 <br /> ' Summary of Ground Water Analytical Results, <br /> Analyte <br /> ' Sample Date Benzene Toluene Ethyl Total TPH-Gas <br /> Location Collected (µg/L) (µg/L) Benzene Xylene (mg/L) <br /> (Ag/L) OWL) <br /> r MW-1A 09/22/98 680 150 130 3,000 17 <br /> MW-5 09/22/98 ND ND ND ND ND <br /> MW-6 09/22/98 ND ND 0.7 1.5 0.10 <br /> ' N(W-7 09/22/98 ND ND ND ND ND <br /> MW-9 09/22/98 ND ND ND ND ND <br /> North Well 09/30/98 ND ND ND ND ND <br /> South Well 09/30/98 ND ND ND ND ND <br /> r ND=Not detected above the laboratory detection limit. <br /> NA= Sample not analyzed for constituent. <br /> 5.2 Ground Water Gradient <br /> '• A ground water gradient map was produced from the.data obtained from the September <br /> 22, 1998 sampling event (Figure 2). The elevations used in the calculation are <br /> summarized in Table 3. The ground water flow direction was toward the northwest <br /> during this sampling event. This gradient and flow direction is consistent with previous <br /> monitoring events. <br /> rTABLE 3 <br /> Monitoring Well Water Elevations -September 22, 1998 <br /> Well Well Collar Depth to Water Ground Water <br /> Number Elevation (feet) Elevation (feet) <br /> (feet) <br /> ' MW-1 NA 11.44' NA <br /> MW-5 57.86' 11.57' 46.29' <br /> MW-6 57.27' 11.17' 46.10' <br /> r <br /> MW-7 56.15' 9.42' 46.73' <br /> MW-9 56.60' I0.45' 46.15' <br /> i <br /> r <br /> • CA95 DE-024 American Geological Services,Inc. <br /> 1 8 <br /> 1 <br />