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26 December 2000 <br />• AGE-NC Project No 97-0300 <br /> Page 3 of 4 <br /> sample <br /> 3 4 1 RELATIVE GROUND WATER ELEVATION AND GRADLENT <br /> The depths to ground water in wells MW-1, MW-2 and MW-3 were measured between 51 50 and <br /> 52 15 feet below the tops of the well casings Ground water elevations at the site were calculated to <br /> be between 34 34 feet and 34 41 feet below mean sea level, ground water elevations are depicted in <br /> Figure 3 Ground water elevations at the site decreased an average 8 91 feet between the June 2000 <br /> and the September 2000 groundwater monitoring events On 28 September 2000,the general ground <br /> water gradient at the site was calculated to be approximately 0 002 ft/ft or approximately 11 feet per <br /> mile and directed towards the southeast (Figure 3) <br /> 3 4 2 LABORATORY RESULTS OF GROUND WATER SAMPLES <br /> TPH-d was detected in the water sample collected from well MW-1 at a concentration. of 59 ,ug/l, <br /> however, the laboratory reported the sample chromatogram to have significant diesel range <br /> compounds and no recognizable pattern <br /> No other petroleum hydrocarbon constituents, volatile aromatic compounds or fuel oxygenated <br /> compounds were detected by the laboratory analysis Analytical results of the ground water samples <br /> are summarized in Table 2 The laboratory reports (McCampbell Analytical Inc I D 49176, 49177 <br /> and 49178) and chain-of-custody forms are presented in Appendix B <br /> I4 0. SUMMARY AND CONCLUSIONS <br /> The implications from the findings of the September 2000 quarterly ground water monitoring event <br /> are <br /> • Ground water flow direction at the site appeared to be oriented generally southeast at a <br /> gradient of 0 002 on 28 September 2000 (Figure 3) Due to the low gradient at the site, slight <br /> variations in ground water measurements or changes of recharge/discharge of the local <br /> ground water could greatly modify the modeled ground water flow direction <br /> • The ground water elevation at the site was within the screened intervals of wells MW-1, <br /> MW-2 and MW-3 and yield samples fully representative of shallow ground water conditions <br /> • Ground water elevations at the site decreased an average 8 91 feet between the June 2000 <br /> Advanced GeoEnvironmental,Inc <br />