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i lie 19 March 2001 AGE-NC Project No 97-0300 I Page 3 of 4 i 3 1 GROUND WATER ELEVATION AND GRADIENT The depths to ground water In wells MW-1, MW-2 and MW-3 were measured between 44 24 and p �' 44 90 feet below the tops of the well casings Ground water elevations at the site were calculated to be between 27 08 feet and 27 15 feet below mean sea level, ground water elevations are depicted in Figure 3 Ground water elevations at the site increased an average 7 26 feet between the September I 2000 and the December 2000 ground water monitoring events On 28 December 2000, the general ground water gradient at the site was calculated to be approximately 0 001 ft/fl or approximately 5 feet per mile and directed towards the south (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 December 2000 laboratory analysis Analytical results of the ground water samples are summarized in Table 2 The laboratory reports (McCampbell Analytical Inc I D 57234 through 57236) and chain-of-custody forms are presented in Appendix B 4.0. SUMMARY AND CONCLUSIONS IThe implications from the findings of the December 2000 fourth quarter ground water monitoring event are I • Ground water flow direction at the site appeared to be oriented generally south at a gradient of 0 001 (Figure 3) Due to the low gradient at the site, slight variations in ground water I measurements or changes of recharge/discharge of the local ground water could greatly modify the modeled ground water flow direction • 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 7 26 feet between the September 2000 and the December 2000 ground water monitoring events (Table 1) The increase of ground water elevations is probably due to the seasonal fluctuation pattern • 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 Geo Environmental,Inc