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i k <br /> y 1 <br /> h• 27 September 2004 ' <br /> AGE-NC Project No 95-0142 <br /> Page 6 of 7 <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> I It <br /> 1 Based on the data collected from the site, AGE concludes J <br /> UY <br />' Results from previous assessment Investigations indicated that the highest concentrations of <br /> petroleum hydrocarbons in soil and ground water were near the former UST area TK1-90, J �� <br />' at depth intervals of 10 to 40 feet bsg (VW-1), SVE and ground water remediation efforts <br /> are directed in this area Ongoing operation of the remediation system should result in the, <br /> reduction of hydrocarbon-impact to soil and ground water <br /> • A total of 26 gallons of gasoline as vapor were removed between the second and third a <br /> quarters 4 of operation A total of 137 gallons of gasoline as vapor were removed since <br /> remediation began operation <br /> 1 <br /> • ; The ground water pump-and-treat system was in operation during the second and third <br /> quarters of 2004 for approximately 120 days Approximately 273,247 gallons of water were <br /> processed,AGE estimates that an average of 2,200 gallons of water were discharged per,day <br /> during this time <br /> I I , <br /> lie Based on the amount of ground water processed and laboratory analytical results, <br /> 1 approximately 1 81 lbs of benzene and 14 lbs of TPH-g were removed from the extracted <br /> ground water <br /> G <br /> I5.0. RECOMMENDATIONS T ry ^ <br /> Based,upon the results of the remediation activities to date, AGE recommends <br /> • Continued operation of the ground 'water extraction system and soil vapor extraction system <br /> at the isite, and <br /> • Continued quarterly ground water momtonng,at the site The next quarterly ground water <br /> sampling-and monitoring event should be scheduled for fourth quarter 2004— <br /> 'J1 <br /> 004° t ' <br /> i I e <br /> �{ <br /> 1 1 1 <br /> � 1 I <br /> I V <br /> Advanced GeoEnvironmental,Inc <br /> I � <br /> I , <br />