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' 20 December 2005 . AGE-NC Project No 95-0184 ' Page 3 of 5 ' MW-7, VW-2B, and VW-5C As last quarter results Indicated,the ground water appeared to flow generally northeast across much ' of the site under an average hydraulic gradient of approximately 0 004 foot/foot (ft/ft, Figure 3) s ' 3 2 ANALYTICAL RESULTS OF WATER SAMPLES TPH-g was detected in all of the sampled monitoring wells at concentrations ranging from ' 120 micrograms per liter (µg/1) in MW-7 to 210,000 µg/l in VW-2B TPH-d was detected in the sample from MW-4 at a concentration of 21,000 µg/1 A map of dissolved TPH concentrations are l illustrated on Figure 4 / ' Various BTEX compounds were detected in all ground water samples analyzed The maximum concentrations detected were 120,000 µg11 benzene (VW-2B), 81,000 µg/l toluene, 7,500 µg/l ' ethylbenzene, and 37,000 pg/1 total xylenes (VW-5B) A map of dissolved benzene concentrations ,-10are illustrated on Figure 5 1,- 10 MTBE was detected in samples from wells MW-4, VW-2B, VW-3 and VW-4 at concentrations ranging from 64 µg/1 (VW-3) to 480 µg/l (VW-4) A map of dissolved MTBE concentrations Is ' shown on Figure 6 The lead scavenger 1,2-DCA was detected in MW-1, MW-2, MW-4, VW-2B, VW-3, VW-4, ' VW-5B,and VW-5C at concentrations ranging from 4 9µg/l(MW-1)to 380µg/l(VW-4),EDB was detected in VW-2B at a concentration of 86 µg/l A map of dissolved 1,2-DCA concentrations is shown on Figure 7 ' Six additional VOCs were detected at the following maximum concentrations naphthalene at 2,200 µg11 (MW-4), 1,2,4-trimethylbenzene at 5,500 µg/1, n-propylbenzene at 530 µg/l, ' 1,3,5-trimethylbenzene at 1,400µg/l(VW-5B),isopropylbenzene at 130µg/l and p-isopropyltouene at 26 µg/1 (VW-3) ' Analytical results of ground water samples are summarized in Tables 2 and 3 Copies of the laboratory report(CTEL Project No CT214-0509187), quality assurance/quality control (QA/QC) reports, and chain of custody forms are included in Appendix D Documents confirming the upload ' of laboratory electronic deliverable format (EDF) files and depth to water measurements to GeoTracker are included in Appendix E ' Advanced GeoEnhronmental,Inc 1