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� s <br /> � S <br /> I F S J <br /> r20 April 2005 <br /> . AGE-NC Project No 03-1100 <br /> r Page3 of 4 <br /> r <br /> were detected in the ground water sample collected from well MW-2 at a concentration of 770 µg/1 <br /> r (benzene), 12,000 µg/l (toluene), 4,500 µg11 (ethylbenzene), and 20,800 µg/l (total xylenes) <br /> 1,2-DCA'was detected in ground water samples collected from wells MW-2 and'MW-3' at <br /> r concentrations of 33 µg/l and 20 µg/l, respectively <br /> r No other constituents of concern were detected in the ground water analyses at or above laboratory <br /> detection limits Analytical results of water samples collected in November 2004 are summarized <br /> in Table 2 The laboratory report (CTEL Project No CT214-0409008), quality assurance/quality <br /> r control (QA/QC) report, and chain of custody form are included in+Appendix B GeoTracker <br /> confirmation pages of the submitted ground water monitoring electronic deliverableTormat(EDF) <br /> files are included in Appendix C <br /> r , <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> r <br /> Based on the findings from this investigation, AGE concludes <br /> rThe ground water elevation on-site ranged from 25 57 to 29 09 feet below MSL Ground <br /> water flow was inferred to be flowing inward towards the east in the former UST location <br /> under a gradient of ft/ft <br /> r4 TPH-g was detected in the ground water samples collected from wells MW-2 and MW-3 at <br /> a maximum concentration of 200,000 µg/l in well MW-2 <br /> r. • 1,2-DCA was detected in ground water samples collected from wells MW-2 and MW-3 at <br /> concentrations of 33 µg/1 and 20 µg11, respectively <br /> r <br /> rThe lateral extent of TPH-g,impacted ground water has been defined in all directions with <br /> the exception of southeast of MW-2 <br /> r The vertical extent of petroleum hydrocarbon contamination has not be defined in the former <br /> UST location <br /> > w <br />.r.. , _ ..- -�.ti--ALL-..--.- - � • y ._ _ ----a'-. - r -s � f r - - -r s - "--�- .� _.- � <br /> '5.0. RECOMMENDATIONS <br /> Based on the findings of this investigation, AGE recommends <br /> • Continuation of quarterly monitoring of the ground water monitoring wells, <br /> Biannual round'water sam lingof wells MW-4 through MW-7 and <br /> rs Advanced GeoEnvironmentai,Inc <br />