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19 October 2004 AGE-NC Project No. 97-0343 ' Page 3 of 4 ' due east,respectively. Figure 3 illustrates the contoured ground water elevations as measured on 30 June 2004. ' 3.2. ANALYTICAL RESULTS OF GROUND WATER SAMPLES TPH-g, TPH-d, BTEX, and fuel additives were not detected at or above laboratory reporting limits in the ground water samples from wells MW-5, MW-7, and MW-8. ' The analytical results of the water samples collected in June 2004 are summarized in Table 2. The laboratory report (CTEL Project No. CT214-0407002), quality assurance/quality control (QA/QC) report, and chain-of-custody form are included in Appendix D. Documents confirming the upload ' of laboratory electronic deliverable format(EDF) files and depth to ground water measurements to GeoTracker are included in Appendix E. ' 4.0. SUMMARY AND CONCLUSIONS Based on the data collected from the site, AGE finds: ' • At the time of the June 2004 sampling event,depths to groundwater in wells MW-4 through MW-8 ranged from 58.45 feet to 60.06 feet below the tops of the well casings;ground water elevations ranged from 30.18 feet below mean sea level (MSL) in well MW-4 to 31.87 feet ' below MSL in well MW-5 (Table 2). The average ground water elevation at the site this quarter was 31.34 feet below MSL.The average ground water elevation at the site decreased 5.34 feet between the March 2004 and June 2004 sampling events. ' • Ground water at the site appeared to be flowing in an east-northeast plunging trough. The southeast and northwest limbs of the trough were flowing under an average hydraulic gradient of approximately 0.038 foot/foot north-northwest and 0.006 foot/foot due east, respectively. • TPH-g,TPH-d,BTEX,and fuel additives were not detected at or above laboratory reporting ' limits in the ground water samples from wells MW-5, MW-7, and MW-8. • The historically hydrocarbon-impacted well MW-1 was not purged or sampled during the June 2004 monitoring event because the well was dry. • The lateral and vertical extents of the hydrocarbon-impacted ground water appear to be limited to an isolated dissolved mass above well MW-8, within the wells MW-4 to MW-7, and within the upper reaches of the upper water table,yet under depth of the dry well casings. . The nature of the water table at the site is controlled by the seasonal rase and fall of the water Advanced GeoEnvironmental,Inc.