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r i <br /> 06 September 2005 <br /> • AGE-NC Project No 95-0184 <br /> rPage 3 of 5 <br />' MW-1 through MW-4, MW-7, VW-213, and VW-5C <br /> As last quarter results indicated, the ground water appeared to flow generally east across much of <br /> the site rider an average hydraulic gradient of approximately 0 003 foot/foot (ft/ft, Figure 1 and <br /> r Table jf ,SAS <br /> k Hyl 11 <br /> r3 2 ANALYTICAL RESULTS OF WATER SAMPLES <br /> I TPH-g was detected in all of the sampled monitoring wells at concentrations ranging from <br /> 800 micrograms per liter (µg/l) in MW-7 to 300,000 µg/1 in VW-5B TPH-d was detected in the <br /> sample from MW-4 at a concentration of 21,000 µg/l A map of dissolved TPH concentrations are <br />' illustrated on Figure 4 <br /> Various BTEX compounds were detected in all ground water samples analyzed The aximum <br /> 1N <br /> concentrations detected were 37,000 µg/1 benzene (VW-4), 170,000 µg/l toluene, 2000 µgr � , �5 <br />' eth lbenzene,and 91,000 1 total xylenes (VW-5B) A map of dissolved benzene concentrations a' <br /> Y µ� � <br /> are illustrated on Figure 5 <br /> MTBE was detected in samples from wells MW-4, VW-2B, VW-3 and VW-4 at concentrations <br />' ranging from 17µg11 (VW-3) to 520 µg/l (VW-4) <br /> The lead scavenger 1,2-DCA was detected in MW-4,VW-213,VW-3,VW-4,VW-513,and VW-5C <br />' at concentrations ranging from 9 3 µg/l(VW-5C)to 310 µg/l (VW-4/MW-4), EDB was detected in <br /> MW-4,VW-213 and VW-5B at concentrations ranging from 56 pg/1(VW-5B)to 290µg/1(VW-2B) <br /> A map of dissolved MTBE and 1,2-DCA concentrations is shown on Figure 6 <br />' Eight additional VOCs were detected at the following maximum concentrations naphthalene at <br /> 1,300µg/l(VW-5B), 1,2,4-trimethylbenzene at 13,000 µg/l (VW-5B),n-propylbenzene at 400 µg/l <br />' (VW-5B), 1,3,5 tnmethylbenzene at 3,900 µg/l(VW-5B),isopropylbenzene at 390 µg/I(MW-5B), <br /> p-isopropyltouene at 22 µg/1 (VW-5B) and n-butylbenzene at 210 µg/I (VW-2B) <br /> r <br /> Analytical results of ground water samples are summarized in Tables 3 and Copies of the <br />' laboratory report(CTEL Project No CT214-0503241), quality assurance/quality control(QA/QC) <br /> reports,and chain of custody forms are included in Appendix D Documents confirming the upload <br />' of laboratory electronic deliverable format (EDF) files and depth to water measurements to <br /> GeoTracker are included in Appendix E <br /> • <br /> 1 Advanced GcoEnvironmental,Inc <br /> 1 <br />