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1 '� '10 November 2004 <br /> AGE-NC Project No 03-1100 <br /> Page 3 of 4 - ; <br /> 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was only detected In ground water samples collected from wells MW-2 and MW-3 at <br /> concentrations of 190,000 micrograms per liter(µg/l}and-120µg/l,respectively BTEX components <br /> were only detected,in ground water samples collected from wells MW-2 and MW-3 at maximum <br /> Y concentrations in MW-2 of 1,700 µg/1(benzene), 12,000 µg/l (toluene), 3,700 µg/1(ethylbenzene), <br /> and 15,700 µg/l (total xylenes) <br /> 1,2-DCA was detected in ground water samples collected from wells MW-2 and MW-3 at' <br />' concentrations of 120 µg/1 and 43 µg/1;respectively MTBE was not detected In any of the analyzed <br /> samples No other constituents of concern were detected at or above laboratory detection limits <br />' AnalyticaI results of water samples collected during June 2004 are summarized In Table 2 The <br /> laboratory report(CTEL Project No CT214-0406151), quality assurance/quality control(QA/QC) <br /> report, and chain of custody form are included In Appendix B <br /> 1 ,s <br /> 40. SUMMARY AND CONCLUSIONS <br /> r <br /> Based on the findings from this investigation, AGE concludes 1 <br /> • The ground water elevations on-site ranged from 23 27 to 23 81 feet below MSL Ground <br /> water flow was Inferred to be flowing Inwards towards an elongated depression at the former <br />' UST location under a gradient of 0 008 ft/fl or less <br /> • TPH-g was detected In samples collected from wells MW-2 and MW-3 at concentrations of <br /> '190,000 µg/1 and 120 µg/1, respectively W <br /> • 1,2-DCA was detected In ground water samples collected from wells MW-2 and MW-3 at <br /> concentrations of 120 µg11 and 43,µg/l, respectively MTBE was not detected at or above <br />' laboratory reporting limits in any of the analyzed ground water samples <br /> �' The lateral extent of TPH-g;Impacted ground water has been defined northwest, west, and_ <br /> southwest of the former UST area, but not,to the east <br /> • The vertical extent of petroleum hydrocarbon contamination has not been defined In the <br /> vicinity of the former UST location w ;s <br /> r <br /> z <br /> „ <br />' Advanced GeoEnvironment at,Inc <br /> 1 , <br />