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08 June 2001 AGE-NC Project No 95-0137 Page 8 of 9 ' Benzene was only detected in the sample collected from well MW-2 at a concentration of 120 µ9/1 Toluene, ethylbenzene and total xylenes were reported in sample from well MW-2 at concentrations of 3 0 4g11, 95 µg/1 and 96 4g11, respectively No other ground water samples contained detectable concentrations of BTEX MTBE was not detected above reporting limits in any of the samples utilizing EPA method 8020 ' Utilizing EPA method 8260, MTBE was reported in ground water samples MW-2 and MW-8 at concentrations of 4 0 µg/1 and 3 6 ,ug/l, respectively TBA was detected in three samples at concentrations up to 12 ,ug/l DIPE, ETBE and TAME were not reported in any of the samples ' The analytical results are summarized in Tables 6 and 7 A co of the laboratory report MAI Lab Yt PY rY P � ' ID Numbers 65265 through 65269 and Jimco ID 65261 through 65263), quality assurance and quality control (QA/QC) and chain-of-custody form are included in Appendix F ' 4 0. SUMMARY AND CONCLUSIONS ' . Based on the data collected from the site, AGE finds TPH-g and BTEX compounds were detected in the soil samples collected from well ' installation • The fuel additive 1,2-DCA was detected at low concentrations in two soil sample collected ' from the site • Ground water was encountered in the monitoring wells at approximately 19 feet bsg ' • Hydrocarbon concentrations in ground water decreased over the quarter • Approximately 460 gallons (1,300 kg) of hydrocarbons were extracted and destroyed by the SVE network at the site between 05 December 2000 and 09 April 2001 ' S.O. RECOMMENDATIONS Based on the findings of the remediation activities recounted in this report, AGE recommends 1 • Conduct a quarterly ground water monitoring event in July 2001 to coincide with the Jimco Truck Stop site • Continue operation of the soil vapor extraction and air-sparing network ' Advanced GeoEnvironmental,Inc