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i 20 July 2001 AGE-NC Project No 97-0300 Page 3 of 4 I3 1 GROUND WATER ELEVATION AND GRADIENT The depths to ground water in wells MW-1, MW-2 and MW-3 were measured between 43 93 and 44 68 feet below the tops of the well casings Ground water elevations at the site were calculated to be between 26 77 feet and 26 93 feet below mean sea level, ground water elevations are depicted In Figure 3 Ground water elevations at the site Increased an average 0 28 feet between the December I 2000 and the March 2001 ground water monitoring events On 22 March 2001, the general ground water flow direction at the site was Inferred to be toward the southwest at an estimated gradient of 0 003 ft/ft or less, approximately 15 feet per mile (Figure 3) 3 2 LABORATORY RESULTS OF GROUND WATER SAMPLES Dissolved petroleum hydrocarbon constituents, volatile aromatic compounds and fuel oxygenated compounds were not detected by the March 2001 laboratory analysis Analytical results of the ground water samples are summarized in Tables 2 and 3 The laboratory reports (McCampbell Analytical Inc I D 63995 through 63997) and chain-of-custody forms are presented in Appendix B 4 0. SUMMARY AND CONCLUSIONS The implications from the findings of the March 2001 first quarter ground water monitoring event are • Ground water flow direction at the site appeared to be oriented generally southwest at a gradient of 0 003 (Figure 3) Due to the low gradient at the site, slight variations In ground water measurements or changes of recharge/discharge of the local ground water could greatly modify the modeled ground water flow direction I • The ground water elevation at the site was within the screened Intervals of wells MW-1, MW-2 and MW-3 and yield samples fully representative of shallow ground water conditions • Ground water elevations at the site Increased an average 0 28 feet between the December 2000 and the March 2001 ground water monitoring events (Table 1) The Increase of ground water elevations Is probably due to the seasonal fluctuation pattern I • No petroleum hydrocarbon constituents, volatile aromatic compounds or fuel oxygenated compounds were detected by laboratory analysis, however very low concentrations of dissolved TPH-d have previously been detected In the area of monitoring well MW-1 Indicating that there Is only a minor impact to ground water In the area assessed Advanced GeoEnvironmental,Inc