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1 <br /> t09 July 2002 <br /> AGE-NC Project No 98-0497 <br />' Page 3 of 4 <br />' 3 2 ANALYTICAL RESULTS FROM GROUND WATER SAMPLES <br /> The analytical results from the 04 June 2002 ground water sampling event are as follows <br /> • TPH-g and TPH-d were detected 1n well MW-l at concentration of 670 micrograms per liter <br />' (µg11) and 8,100 gg/l, respectively The laboratory report noted that strongly-aged gasoline <br /> or diesel compounds were significant <br /> • BTEX compounds were not detected in the five ground water samples analyzed <br /> • Fuel additives were not detected in the five ground water samples analyzed <br />' Laboratory results of water samples analyzed for petroleum hydrocarbons are summarized in <br /> Table 2 Copies of the laboratory reports for the quarterly monitonng event (MAI Lab IDs <br />' 0206046-001 through 0206046-005),QA/QC reports and chain-of-custody form are in Appendix B <br />' • 4 0 SUMMARY AND CONCLUSIONS <br /> The findings of the 04 June 2002 ground water monitoring event include the following <br />' • Measured ground water elevation was approximately 36 6 feet below MSL, and was within <br /> the screened interval of each monitoring well Ground water flow direction was northeast <br /> with a gradient of approximately 0 004 feet/feet Historically, flow direction at the site has <br /> been toward the east or has had no observable gradient <br /> • Contamination by TPH-g and TPH-d was encountered in the ground water sample collected <br /> and analyzed from MW-I Concentrations of TPH-g appeared to have stabilized since the <br /> March 2001 monitoring event The detected concentration of TPH-d in the sample collected <br />' from MW-1 during the June 2002 monitoring event is the lowest since monitoring began in <br /> August 2000 TPH-g and TPH-d were not detected in wells MW-2 through MW-5 <br /> • BTEX compounds were not detected in any of the ground water samples analyzed <br /> • Fuel oxygenates were not detected in any of the ground water samples analyzed Fuel <br /> additives have not been detected in ground water samples since monitoring began in August <br />' 2000 <br /> • The hydrocarbon-impacted ground water plume appears to be limited to the area immediately <br />' surrounding MW-1 The inferred areal extent of hydrocarbon-impacted ground water is <br /> . illustrated in Figure 4 <br />' Advanced GeoEnvironmental,Inc <br /> 1 <br />