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' 28 July 2005 AGE-NC Project No 01-0886 ' Page 5 of 6 ' 3 3 GROUND WATER GRADIENT AND FLOW DIRECTION At the time of the May 2005 sampling event,depths to ground water ranged from 64 16 feet(MW-3) ' to 65 56 feet(MW-2)below the tops of the well casings Ground water elevation at the site ranged from 33 87 feet(MW-3)to 34 90 feet(MW-1)below MSL, and averaged approximately 34 49 feet below MSL(Table 1) During this monitoring event,the ground water levels in all three wells were ' within the screened intervals, indicating that the wells are properly screened to yield ground water samples representative of shallow ground water conditions ' Ground water at the site was inferred to be flowing toward the south-southeast under a hydraulic gradient of approximately 0 015 foot/foot (ft/ft) Figure 5 illustrates the contoured ground water elevations as measured on 17 May 2005 �- 3 4 ANALYTICAL RESULTS OF GROUND WATER SAMPLES TPH- was detected in wells MW-1 and MW-3 at concentrations of 100 micrograms per liter 1 g g p (p� ) ' and 200 pg/l, respectively MTBE was detected in wells MW-1 and MW-3 at concentrations of 55 pg/l and 15 pg/l,respectively ' 1,2-DCA was detected in wells MW-1 and MW-3 at concentrations of 28 pg/1 and 190 pg/l, respectively Xylenes were detected in well MW-3 at a concentration of 23 pg/l ' No other analytes were detected at or above laboratory detection limits in the ground ester samples analyzed The analytical results of the ground water samples collected on 4-1 -,Wril 2005 are summarized in Table 3 The laboratory report(CTEL Project No CT214-0505193),QA/QC report, ' and chain of custody form are included in Appendix G ' 4.0. SUNEVIARY AND CONCLUSIONS Based on the data collected from the site, AGE concludes • In general, silt and clayey silt were encountered from surface grade to 50 feet bsg in MW-1, 67 feet bsg in MW-2, and 77 feet in MW-3, underlain by alternating layers of silty sand, ' - - - sandy silt, sand, silt,and clayey silt to the total depths of the borings(80 feet to 85 feet bsg) - • A total of thirteen soil samples were analyzed for the constituents listed in Section 2 1 1 No analytes were detected at or above laboratory detection limits in the soil samples analyzed • At the time of the May 2005 sampling event,depths to ground water ranged from 64 16 feet ' Advanced GcoEnvironmental,Inc 1