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• Analytical laboratory data are summarized as reported b the laboratory in Table 2 below. <br /> P Y rY <br /> Laboratory data sheets, the chain of custody document, and QA/QC data sheets are <br /> included in Appendix A. <br /> i <br /> TABLE 2 <br /> Summary of Ground Water Analytical Results, <br /> June 15 and 22, 1999 <br /> ' Analyte <br /> Sample Sample Ethyl Total TPH-Gas <br /> Location Date Benzene Toluene <br /> (gwL) OWL) Benzene Xylenes (m <br /> (Ag/L) (µgm) g'L) <br /> MW-1A 06/15/99 150 5.3 22 18 3.8 <br /> MW-6 06/15/99 5.1 0.5 7.7 6.2 . 0.4 <br /> MW-5 06/22/99 ND ND ND ND ND <br /> MW-7 06/22/99 ND ND ND ND ND <br /> MW-9 06/22/99 ND ND ND ND ND <br /> North Well 06/22/99 ND ND ND ND ND <br /> South Well 06/22/99 ND ND ND ND ND <br /> ND =Not detected above the laboratory detection limit. <br /> Analytical values represent significant digit accuracy as specified by the analytical <br /> method and its detection limit. <br /> 5.3 Ground Watcr Gradient <br /> A ground water gradient map was produced from the data obtained from the June 15, <br /> 1999 sampling event (Figure 3). The elevations used in the calculation are summarized <br /> in Table 3. The ground water flow direction was toward the northwest during this <br /> sampling event. This gradient and flow direction is consistent with previous monitoring <br /> ievents. <br /> TABLE 3 <br /> Monitoring Well Water Elevations - March 16, 1999 <br /> i Well Well Collar Depth to Water Ground Water <br /> Number Elevation (feet) Elevation (feet) <br /> (feet) <br /> RKA;+IA $ .`ax ? . t08i'$ � a„�R � 3 ; <br /> d.,,tTn. � -fit?-s �a ,. 3e ,.rte-'F. <br /> MW-5 57.86' 10.49' 47.37' <br /> MW-6 57.27' 10.01' 47.26' <br /> ' <br /> MW-7 56 15' 8.23' 4792' <br /> fW : 955 <br /> American Geological Service, Inc. <br /> CA95DE-029 9 <br />