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10 December 2001 <br /> AGE-NC Project No 98-0540 <br />' Page 3 of 4 <br /> I and MW-3 at concentrations of 53 µg/l and 11 µg/1, respectively No fuel oxygenated compounds <br /> were detected above laboratory reporting limits (Table 2) <br /> No contaminants were detected above laboratory reporting limits in the ground water sample <br /> collected from the domestic well on site <br /> Analytical results of ground water samples are summarized on Table 2 Copies of the laboratory <br /> report(AAL Laboratory Order Nos A 108453-01 through A 108453-04)and chain-of-custody forms <br /> are In Appendix B <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based upon data collected from the site, AGE concludes the following <br /> • The maximum ground water gradient was 0 005 ft/ft with a flow direction toward the <br /> southeast, and was consistent with the gradient and flow direction from the last monitoring <br /> I • event <br /> • TPH-g and BTEX compounds were detected In ground water samples collected from MW-1 <br /> I and MW-3 The benzene concentration detected In the sample collected from MW-1 <br /> exceeded the State of California's Maximum Contaminant Level(MCL) of 1 µg/l <br /> • MTBE and other oxygenated fuel additives were not detected above laboratory reporting <br /> limits in any of the ground water samples collected and analyzed <br /> • The highest concentrations of dissolved petroleum hydrocarbons are in the area of the former <br /> UST (MW-1) and down-gradient(MW-3) <br /> • The lateral extent of dissolved petroleum hydrocarbon-impacted ground water has not been <br />' fully delineated <br /> 5.0. RECOMMENDATIONS <br /> Based upon data collected from the site,AGE recommends continued groundwater rxlonitonng The <br /> next quarterly monitoring event should be scheduled for November 2001 <br /> t <br /> Advanced GeoEnvtronmental,Inc <br />