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! 17 August 2005 <br /> • AGE-NC Project No 98-0533 <br />! Page 5 of 6 , <br /> Analytical results of soil samples are summarized on Table 2 The laboratory report(MAI Lab I D <br />! No 86513 through 86518) and chain-of-custody forms are Included in Appendix C <br /> 4 3 GROUND WATER GRADIENT AND FLOW DIRECTION <br />' The elevation of ground water in each of the three monitoring wells was calculated by subtracting <br /> the depth to ground water from the surveyed relative casing elevations(Table 1) Depths to ground <br /> water ranged from 71 59 feet to 71 95 feet bsg Groundwater elevations at the site ranged from 14 84 <br />' feet(MW-2)to 14 94 feet(MW-3)below mean sea level The ground water gradient was calculated <br /> to be 0 0007 ft/ft directed towards the north-northeast Figure 3 Illustrates the contoured ground <br /> water elevations as measured on 31 May 2002 <br />' 44 ANALYTICAL RESULTS OF WATER SAMPLES <br /> Toluene was detected in the water sample from MW-1 and MW-2 at concentrations of 1 1 ug/1 and <br /> 15 ug/l, respectively `, <br /> TPH-ag and toluene were detected in the grab water sample from soil boring B-5 at concentrations <br /> of 54 ug/1 and 16 ug/l,respectively,toluene was detected in the water sample from B-6 at 1 0 ug/1 <br /> No additional petroleum hydrocarbon compounds were detected in ground water samples from the <br /> monitoring wells, the domestic well and the soil boring locations <br /> Analytical results of ground water samples are summarized on Table 3 The laboratory report(MAI <br /> Lab I D No 86519 and 86520 and Work Order 0206035)and chain-of-custody forms are included <br /> in Appendix C <br /> 5.0. SUMMARY AND CONCLUSIONS <br /> Based upon data collected from the site, AGE concludes <br /> t�?A°� <br /> • TPH-ag and toluene were detected in soil sample B-6-65' at 1 8 milligrams per kilogram <br /> (mg/kg) and 0 031 mg/kg, respectively, no additional petroleum hydrocarbon compounds <br /> were detected <br /> • The detections of organic vapors in soil samples by the PID meter are probably erroncous� <br /> due to the wetness of the soil samples, the PID meter is sensitive to water vapor on the <br /> detector <br /> Advanced GeoEnvironmental,Inc <br />