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15 August 2005 • AGE-NC Project No 97-0300 Page 3 of 4 toward the east-southeast at an estimated gradient of 0 002 ft/ft (Figure 3) I 32 LABORATORY RESULTS OF GROUND WATER SAMPLES ,p`S '4yk�.& TPH-g, TPH-d, TPH-mo, BTEX or other analytes weretetected at or above laboratory detection limits in the ground water samples analyzed Analytical results of the ground water samples are summarized in Tables 2 and 3 The laboratory ' report (CTEL Lab Project No CT214-0504077), QA/QC report and COC form are included in Appendix B GeoTracker confirmation pages of the submitted laboratory electronic deliverable format (EDF) files are included in Appendix C 4.0. SUMMARY AND CONCLUSIONS ' The implications from the findings of the April 2005, first quarter ground water monitoring event I� are • Ground water flow direction at the site appeared to be oriented generally east-southeast at an estimated gradient of 0 002(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 ' • 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 groundwater conditions ' • No TPH-g, TPH-d, TPH-mo, BTEX compounds or other analytes were detected by laboratory analysis ' 5.0. RECOMMENDATIONS ' Based upon the results of the second 2005 ground water monitoring event and previous site investigations and, AGE recommends ' • Submission of a ground water monitoring well sample collected from MW-1 to a microbiological laboratory for microbial enumeration and physicochemical analysis to assess the potential for natural attenuation of petroleum hydrocarbons in ground water at the site • Due to the detection of significant TPH-d,TPH-mo, 1,2-DCA,benzene and MTBE in a grab Advanced GeoEnvuonmental,Inc