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25 November 2005 <br /> AGE-NC Project No 95-0167 <br />' Page 3 of 4 <br /> ' 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> During the March 2005 ground water monitoring event, TPH-g was detected in ground water <br /> ' samples collected from monitoring well MW-1 at a concentration of 900 micrograms per liter(lig/1) <br /> BTEX compounds were detected in the ground water samples collected from monitoring well MW-1 <br /> at a concentration of 600 gg/l benzene,46 µg11 toluene,and 76 µg11 total xylenes(ethylbenzene was <br /> non-detect for the sample collected from MW-1 this quarter) <br /> ' Fuel additives 1,2 Dichloroethane (1,2-DCA) and t-Amyl Methly Ether (TAME) were detected in <br /> MW-1, at concentrations of 5 3 µg/1 and 13 lig/l, respectively <br /> ' Analytical results of ground water samples collected during the March 2005 monitoring event are <br /> summarized in Table 2 Figure 4 illustrates the estimated lateral distribution of dissolved TPH-g at <br /> the site The laboratory report(CTEL ProjectNo CT214-0503266),quality assurance/quality control <br /> ' (QA/QC) report, and chain of custody forms are included in Appendix C Documents confirming <br /> the upload of laboratory electronic deliverable format(EDF)files and depth to water measurements <br /> to GeoTracker are included in Appendix F <br /> 1 <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> ' •• On 25 March 2005 depths to ground water ranged from 13 78 to 14 61 feet below the tops <br /> of the well casings Ground water elevations at the site averaged approximately 2 98 feet <br /> below mean sea level (MSL), indicating an average elevation increase of 2 6 feet since the <br /> last monitoring event in December 2004 <br /> ' • Ground water flow was determined to be towards the east-northeast under a hydraulic <br /> gradient ranging from 0 002 to 0 004 ft/ft <br /> ' TPH-g was detected in ground water samples collected from monitoring well MW-1 at a <br /> concentration of 900µg/1 BTEX compounds were detected in the ground water samples <br /> collected from monitoring well MW-1 at concentrations 600 µg/l benzene, 46 µg11 toluene, <br /> ' and 76 µgll total xylenes <br /> • The lateral extent of petroleum hydrocarbon contamination is fully defined as of this <br /> ' quarter's monitoring event to the west by well MW-3, to the south by well MW-7, to the <br /> east by well MW-5,to the northeast by well MW-2-, and to the north by well MW-4 boring <br /> CPT-1 <br /> ' Advanced GeoEnvnronmental,Inc <br />