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05 January 2004 <br /> 'AGE-NC Project No. 95-0137 <br /> tPage 7 of 8 <br /> Analytical results of soil samples analyzed for petroleum hydrocarbons are summarized in Tables 7' <br /> and 8. The complete laboratory reports (CAL Laboratory ID 031.0112 and 0310128), quality <br /> assurance and quality control (QA/QC) reports and chains-of-custody are in in Appendix F. <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based on-the data collected from the site, AGE finds, <br /> • Approximately 26.95 kg(59.425 lbs)or 9.5 gallons of TPH-g were extracted and destroyed <br /> ' by the SVE network at the site between September and December 2003 (third and fourth <br /> quarters), for a total of 2,122.45 kg (4,229.125 lbs) or 748.5 gallons TPH-g removed <br /> between December 2000 and December 2003. <br /> ' Extracted organic vapor concentrations measured with the OVM were low compared to the <br /> analytical results from the soil-vapor samples; the highest concentration of organic vapor <br /> measured with the OVM was 15 ppmv. <br /> The ground water depth increased an average of 1.6 feet between the second and fourth <br /> quarter monitoring events; the decreased depth of the water table has exposed additional <br /> petroleum hydrocarbon-impacted soil to the SVE system. <br /> • Dissolved hydrocarbon concentrations were generally below detection limits and remained <br /> ' well below the highest concentrations detected at the site. <br /> • Dissolved 1,2 DCA concentrations have remained stable and generally declining;however, <br /> the concentrations are still above the MCL of 0.5 µg/1 in drinking water. <br /> • The hydrocarbon impact to soil has been mitigated. - baa l� h q�G t►z9� r�7 Si , <br /> { <br /> 1 <br /> ' Advanced GeoEnvirunmental,Inc. <br />