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I09 January 2006 . AGE-NC Project No 98-0497 Page 3 of 4 ' Ground water flow direction was calculated from the ground water elevation data The ground water was inferred to be flowing toward the northeast at an approximate hydraulic gradient of 0 005 ft/ft Figure 3 illustrates the contoured ground water elevations as measured on 30 June 2005 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES ' The analytical results from the June 2005 ground water monitoring event are as follows ' • TPH-g was detected in well MW-1 at a concentration of 4,000 micrograms per liter(µg/1) The laboratory report noted that the detected concentration was mostly in the diesel range • TPH-d was detected in well MW-1 at a concentration of 440,000 µgll • BTEX compounds were not detected in the five ground water samples analyzed ' • MTBE,DIPE, TAME, ETBE and TBA were not detected in the five ground water samples w analyzed ' Laboratory results of the submitted water samples are summarized in Table 2 The inferred areal extent of hydrocarbon-impacted ground water is illustrated on Figure 4 Copies of the laboratory report(CTEL Project No CT214-0507004),quality assurance/quality control(QA/QC)reports,and chain of custody form are provided 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 findings of the June 2005 ground water monitoring event include the following • Ground water elevations at the site averaged approximately 40 42 feet below MSL, indicating an average increase of 0 16 feet since the last monitoring event in March 2005 ' • The ground water was inferred to be flowing toward the northeast at an approximate - hydraulic gradient of 0 005 ft/ft • TPH-g and TPH-d were detected in well MW-1 at concentrations of 4,000 µg/l and ' 440,000 µg/l, respectively,however, the reported TPH-g concentrations were mostly in the TPH-d range ' • Comparing the ground water sample results from this quarter and the previous quarter, TPH-d concentrations have increased in well MW-1 (from 84,000 pg/l to 440,000 ug/l)and remained non detect in samples from wells MW-2 through MW-5 4 ' Advanced GeoEnvironmental,Inc