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i ' 24 January 2006 AGE-NC-99-0570 ' Page 3 of 5 ' 3.0. FINDINGS Ground water elevation, flow direction, and gradient were determined from field data collected on ' '28'July 2005 Hydrocarbon impact to groundwater was assessed by laboratory analysis of the ground water samples ' 3 1 GROUND WATER ELEVATION AND GRADIENT ' The depth to ground water ranged from 13 14 feet below the top of the well casing(btoc) in MW-3 to 14 50 feet btoc in MW-5 The relative ground water elevation ranged from 7 41 feet below mean seal level(MSL)in MW-3 to 10 18 feet below MSL in MW-5 During this monitoring event,the top of the ground water table occurred within the screened intervals of the wells Ground water was inferred to be flowing north-northwest under a significant hydraulic gradient of ' approximately 0 027 foot/foot(ft/ft) The ground water elevation contours are depicted on Figure 3 • 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES ' TPH-g was detected in samples MW-1, MW-2 and MW-5 at concentrations of 5,400 micrograms per liter(gg/1), 1,700 µg/1 and 200 µg/1,respectively TPH-d was not detected in any of the samples analyzed ' BTEX compounds were detected in wells MW-1,MW-2 and MW-3 at maximum concentrations of 39 gg/1 benzene(MW-1), 6 0 µg/l toluene (MW-2), 460 µg/l ethylbenzene (MW-1)and 1,155 µg/1 xylenes (MW-1) MTBE was detected in wells MW-1, MW-2 and MW-3 at concentrations of 59 µg/l, 3 7µg/I and 6 0 gg/l, respectively No other target analytes were detected at or above laboratory reporting limits in any of the samples analyzed Laboratory results of ground water samples are summarized in Table 2 The laboratory report(CTEL Project No CT214-0507191),quality assurance/quality control(QA/QC)reports,and chain of custody form are included in Appendix D Documents confirming the upload of laboratory Ielectronic deliverable format (EDF) files and depth to water measurements to GeoTracker are included in Appendix E IAdvanced GeoEnvironmentel,Inc