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29 October 2003 <br /> AGE-NC Project No 97-0326 <br />' Page 3 of <br /> I Ground water elevation contours based on the data for the July 2003 monitoring event are illustrated <br /> on Figure 2 The ground water flow direction was northeast with an average hydraulic gradient of <br /> approximately 0 002 feet/feet This is the first time the gradient has been in a northeasterly direction <br /> rotating approximately ninety degrees from the south-southeast gradient normally encountered at the <br /> site <br />' 3 2 ANALYTICAL RESULTS OF WATER SAMPLES <br /> ITPH-g was detected in samples collected from MW-1, MW-2 and MW-3 at concentrations of <br /> 130,000 micrograms per liter(gg/1),29,000µg/l and 73,000µg11,respectively TPH-g concentrations <br /> fand estimates of extent are provided in Figure 3 <br /> BTEX compounds were detected in all of the wells sampled Benzene was detected in samples from <br />' MW-1,MW-2 and MW-3 at concentrations of 11,000µg/1, 13,000µg/1 and 3,400µg/l,respectively <br /> Toluene,ethylbenzene and xylenes were detected at maximum concentrations of 13,000µg/l(MW-1 <br /> and MW-3), 6,300 µg/1 (MW-1) and 31,000 µg11 (MW-1), respectively <br /> MTBE was detected in the ground water samples from MW-1, MW-2 and MW-3, at concentrations <br /> of 120 µg/1, 25 µg/1 and 230 µg/1, respectively MTBE concentrations and estimates of extent are <br />' provided in Figure 4 <br /> 1,2-DCA was detected in the ground water samples collected from MW-1, MW-2, and MW-3 at <br /> concentrations of 29 gg/l, 2 3 µg/1, and 9 6 µg11, respectively <br /> EDB was detected in the ground water sample collected from MW-1 at a concentration of 5 7 µg/1 <br />' No other fuel additives were detected at or above laboratory detection limits in the samples analyzed <br /> Analytical results of the ground water samples for the July 2003 monitoring event are summarized <br />' on Table 2 The laboratory report (CTEL Project No 214-0307054), QA/QC report and chain-of- <br /> custody form are included in Appendix C <br /> 4.0. SUMMARY AND CONCLUSIONS <br />' Based on the data collected from the site, AGE finds <br /> • The inferred ground water flow direction at the site has been dominantly toward the south- <br /> southeast during the fourteen monitoring events conducted previously The inferred ground <br /> Advanced GeoEnvironmental,Inc <br /> I <br />