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t <br /> • 16 July 2001 <br /> AGE-NC Project No 95-0135 <br />' Page 3 of 4 ` <br />' 3 2 LABORATORY RESULTS OF GROUND WATER SAMPLES <br /> r " <br /> TPH-g was detected in the water samples collected from monitoring wells MW-IA and MW-1B <br />' at concentrations of 6,080 micrograms per liter(µg/1)and 336 gg/,1,respectively TPH-g was detected <br /> in the water samples collected from monitoring wells MW-2A and MW-2B at concentrations of <br /> 1,590 µg/1 and 4,680 gg/l, respectively <br /> y I � <br /> Benzene was detected in samples MW-lA, MW-2A and MW-2B at concentrations of 1,284 gg/l, <br /> 145 4g/1 and 490 µg/1, respectively <br /> The remaining BTEX compounds were variously detected in samples MW-1A, MW-1B, MW-2A <br />' and MW-2B at concentrations ranging from 10 µg/1 (ethylbenzene in MW-1B) to 300 µg/1 <br /> (ethylbenzene in MW-1A) <br />' TPH and BTEX compounds were not detected in samples MW-3A and MW-3B <br /> DIPE, MTBE and TBA were detected in water samples collected this quarter DIPE was detected <br />�. in,sample MW-2A at a concentration of 44 4g/1 MTBE and TBA were detected in well MW-2B at <br /> concentrations of 20 µg/1 and 160 gg/l, respectively <br /> Analytical results of ground water samples are summarized on Table 2 The laboratory report(PET <br /> PEI 1268-01 to 06), Quality Control and Quality Assurance (QA/QC) and chain-of-custody are in <br /> Appendix B <br /> 4.0. SUMMARY/CONCLUSIONS <br /> The following conclusions were drawn from the results of this investigation <br /> On 09 April 2001 the shallow ground water flow direction at the site was generally toward <br /> the southeast and the deep ground water flow direction was toward the southeast Ground <br /> water elevation had decreased an average 0 77 feet between the March 2000 and Apri12001 <br /> monitoring events <br /> ® The analytical data from samples MW-1 and MW-2 indicated that the highest concentration <br /> of dissolved hydrocarbons are in the western portion of the site <br /> Monitoring well MW-3 appears to be located beyond the_eastern margin of the dissolved , <br /> hydrocarbon plume <br /> • s The lateral extent of dissolved hydrocarbons is not defined to the west, south and north of <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />