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{ <br /> SYSTEM INSTALLATION <br /> Since most of the underground plumbing for the system has been installed, the system installation phase <br /> of the project will consist of preparing the treatment compound area for use and procurement and <br /> installation of the required equipment This will include completion of the plumbing network, <br /> installation of a fence, and providing electrical (and natural gas) servicing to operate the equipment <br /> After the permit for discharging the treated groundwater has been obtained, the final discharge <br /> connections for the water effluent line will be made We expect that the vapor system can be <br /> operational within b months of approval of the CAP by PHS/EHD <br /> SYSTEM OPERATION <br /> It is expected that mitigation of the site will require at least 3 years of system operation After one year <br /> of operation, the performance of the system will be evaluated to determine if any wells need to be <br /> . added to the air collection system or if groundwater extraction is necessary in other areas of the site to <br /> complement treatment Operation and maintenance of the system will require regular site visits to <br /> monitor system performance, adjust valves, collect vapor samples, and perform normal system <br /> maintenance Groundwater will be sampled on a quarterly basis and the groundwater gradient will be <br /> measured at each sampling event Quarterly monitoring reports will be submitted to PHS/EHD as <br /> required <br /> CONCLUSIONS <br /> Based on the site assessment data, soil contamination beneath the site exists in essentially three limited <br /> areas, two of them located near the former underground tank cluster Prehmmary mass calculations <br /> based on the soil analytical data indicate up to 29,000 lbs of hydrocarbon are present in the soil <br /> Treatment of the soil will be accomplished by vapor extraction, which was proven as an effective <br /> • <br /> Page 11 <br />