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01 June 2005 AGE-NC-99-0570 Page 3 of 4 occurred within the screened intervals of the wells Ground water was inferred to be flowing to the I north-northwest under a significant hydraulic gradient of approximately 0 02 foot/foot (ft/ft) The ground water elevation contours are depicted on Figure 3 t _ 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES TPH-g was detected in samples MW-2 and MW-3 at concentrations of 1,500 micrograms per liter (µg/1) and 110 µg11, respectively TPH-d was not detected in any of the samples analyzed ' BTEX compounds were detected in well MW-2 at concentrations of 10 µg/I ethylbenzene and 215 µg/1 xylenes ' MTBE was detected in well MW-3 at a concentration of 110 µg11 ' 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 CT214-0501153),quality assurance/quality control(QA/QC)report,and lie chain of custody form are included in Appendix C Documents confirming the upload of laboratory electronic deliverable format (EDF) files and depth to water measurements to GeoTracker are ' included in Appendix D r ' 4.0. SUMMARY AND CONCLUSIONS Based on the results of the January 2005 monitoring event, AGE draws the following conclusions 1 Ground water flow direction was toward the north-northwest from the former dispenser area at a hydraulic gradient of 0 02 ft/ft This flow direction and gradient are similar to previous ' monitoring events • MTBE was detected in the ground water sample collected from monitoring well MW-3 ' TPH-g was detected in monitoring wells MW-2 and MW-3 at concentrations of 1,500 gg/1 and 110 µg/1, respectively 5.0. RECOMMENDATIONS Based upon the findings of the January 2005 monitoring event, AGE recommends Advanced GeoEnvironmental,inc t