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1 <br /> Ile 10 October 2000 <br /> AGE-NC Project No 97-0249 <br />' Page 3 of 5 <br />' and 7 05 feet below mean sea level Ground water elevation at the site decreased an average 4 85 feet <br /> between the May 2000 and the August 2000 ground water monitoring events The ground water <br /> elevation data for MW-1 through MW-6 during the August 2000 ground water monitoring event is <br />' depicted in Figure 3 <br /> Ground water monitoring data collected at Three B's Truck Plaza wells MW-1 through MW-6 and <br />' Flag City Chevron wells MW-7, MW-12A and MW-13A indicated a ground water flow direction <br /> generally toward the west-southwest at a gradient of 0 004 ft/ft, or approximately 21 feet per mile <br /> (Figure 3) <br /> I <br /> 3 2 LABORATORY RESULTS OF MONITORING WELL GROUND WATER SAMPLES <br /> I A total of six ground water samples were submitted to a DHS-certified laboratory in August 2000 <br /> gu <br /> TPH-g was detected in water samples collected from wells MW-1,MW-2,MW-3,MW-5 and MW-6 <br /> Iat concentrations ranging between 170 and 8,100 micrograms per liter(yg/1),the laboratory reported <br /> each TPH-g chromatogram as having unmodified or weakly modified gasoline patterns TPH-d was <br /> detected in water samples collected from wells MW-1, MW-2, MW-3, and MW-6 at concentrations <br /> Ile ranging between 240 and 690,ug/l, however, the laboratory reported that the diesel chromatograms <br /> from each sample chromatogram contained significant lighter range gasoline compounds or that the <br /> diesel range compounds were significant <br /> BTEX compounds were detected in ground water samples collected from wells MW-1, MW-2, <br />' MW-3,MW-5 and MW-6 at concentrations ranging between 0 94 and 1,700,ug/l (benzene,MW-3) <br /> MTBE was detected in a ground water sample collected from well MW-4 at a concentration of 17 <br /> I ,ug/l TBA was detected in ground water samples collected from wells MW-2 and MW-3 at <br /> concentrations of 65 and 48,ug/l, respectively No other fuel oxygenates were detected in any other <br /> analyzed Three B's Truck Plaza ground water samples above the respective laboratory reporting <br /> limits <br /> Analytical results of the ground water samples are summarized in Table 2 The laboratory reports <br /> I (McCampbell Analytical Inc I D No 46429 through 46434) and cham-of-custody forms are <br /> presented in Appendix C <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> fThe implications from the August 2000 ground water monitoring event are as follows <br /> • <br /> IAdvanced CeoEnvironmental,Inc <br /> I <br />