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' 22 December 2005 AGE-NC Project No 95-0128 ' Page 3 of 4 ' 3 2 ANALYTICAL RESULTS OF MONITORING WELL GROUND WATER SAMPLES TPH-g was only reported in the ground water sample from vapor well VW-1 at a concentration of 5,800 micrograms per liter(µg/1) MTBE was reported in the samples collected from vapor well VW-1 and monitoring wells MW-1 1 A ' and MW-18 at concentrations of 18 µg11, 16 µg/1, 8 2 µg/l, respectively BTEX compounds were reported In sample VW-1 at concentrations of 50 [ig/l benzene 9 9 µg/1 ' ethyl-benzene, 2 0 pg/l toluene and 7 0 µg/1 total xylenes No additional target analytes were detected at or above laboratory reporting Iimits in the samples ' analyzed The analytical results are summarized in Tables 2 and 3 The laboratory report (CTEL Project No CT214-0511073), including quality assurance/quality control (QA/QC) and chain of custody forms for the quarterly monitoring event 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 10 4.0. SUMMARY AND CONCLUSIONS ' The following conclusions were drawn from the results of this quarterly investigation ' 0 The depth to ground water on 09 November 2005 ranged from 33 91 feet(MW-18)to 37 38 feet (MW-5) below the tops of the well casings The ground water elevation ranged from 22 37 feet(MW-7)to 25 64 feet(MW-5)below mean sea level(MSL) The depth to ground ' water averaged 35 46 feet this quarter, an increase of approximately 0 68 feet since the last sampling event • TPH-g was only reported in ground water sample from vapor well VW-I at a concentration ' of 5,800 gg/l • MTBE was reported in the samples collected from vapor well VW-1 and monitoring wells MW-I IA and MW-18 at a maximum concentration of 18 µg/l (VW-1) MTBE has been reported in two consecutive quarters in well MW-18 Figure 4 depicts the MTBE concentrations at the site during this quarter • BTEX compounds were reported in sample VW-1 at concentrations of 50 gg/I benzene 9 9 pg/l ethyl-benzene, 2 0 µg/1 toluene and 7 0 µg/1 total xylenes • ' Advanced GeoEnvironmental,Inc