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15 July 2002 <br /> . AGE-NC Project No 97-0301 <br /> Page 3 of 5 <br /> ' The ground water elevation data obtained during the March 2002 ground water monitoring event is <br /> depicted in Figure 3 The inferred ground water flow direction for the area bound by wells MW-1 <br /> through MW-7 was inferred to be towards the east-northeast at a gradient of 0 002 ft/ft or less, or <br /> ' approximately 11 feet per mile (Figure 3) <br /> ' 3 2 LABORATORY RESULTS OF GROUND WATER SAMPLES <br /> A total of seven ground water samples were submitted to McCampbell Analytical,Inc , a DHS-certified <br /> laboratory, for analysis TPH-g was detected in water samples collected from wells MW-1 and MW-7 <br /> at concentrations of 11,000 micrograms per liter(ug/1) and 62,000µg/l, the laboratory reported both <br /> samples as having significant unmodified or weakly modified gasoline TPH-d was detected in the <br /> water samples collected from MW-1, MW-5 and MW-7 at concentrations as high as 4,100 gg/l <br /> (MW-7), the laboratory reported the samples from MW-1 and MW-7 as having significant gasoline <br /> range compounds and the sample from MW-5 as leaving significant oil range compounds TPH-k was <br /> ' detected in the water samples collected from MW-1 through MW-5 and MW-7 at concentrations as <br /> high as 5,000µg/l (MW-7) TPH-mo was detected in a water sample collected from well MW-5 at a <br /> � . concentration of 490µg/1 <br /> BTEX compounds were detected in ground water samples collected from wells MW-1, MW-4, MW-5 <br /> ' and MW-7 at concentrations ranging as high as 9,400µg/l (benzene in MW-7) <br /> Utilizing EPA Method 8260M, MTBE was detected in water samples collected from wells MW-1 and <br /> ' MW-6 at concentrations of 11 /.jg/l and 1 1 ,Mg/l, respectively, EDB was detected in a water sample <br /> collected from well MW-1 at a concentration of 3 9 µg/1, 1,2-DCA was detected in water samples <br /> collected from wells MW-1 and MW-7 at concentrations as high as 790µg/1 No other fuel components <br /> were detected during the laboratory analysis / <br /> Previous and current analytical results of ground water monitoring well samples are summarized in <br /> ' Table 3 The laboratory reports (McCampbell Analytical Inc Lab I D 0203071-001 through 007) and <br /> chain-of-custody forms are presented in Appendix B <br /> ' 4.0. SUMMARY AND CONCLUSIONS <br /> The implications from the March 2002 ground water monitoring event are as follows <br /> • <br /> Groundwater flow direction for the area bound by wells MW-1 through MW-7 was inferred <br /> to be towards the east-northeast at a gradient of 0 002 ft/ft or less (Figure 3) Due to the low <br /> Advanced CeoEnvtironmental,Inc <br />