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URS 0 0 <br /> Mr.Robert McClellon <br /> October 22, 2004 <br /> Page 6 <br /> concentrations and the soil gas vacuums in the monitoring probes, to assess the pilot system's <br /> effectiveness. <br /> It is likely that the short-term pilot test will remove the pool of methane gasses that have likely <br /> accumulated within the soil pores over the past years. If this is the case,it is possible that a full-scale <br /> full-time system will not needed. However, if the methane concentration along the northern boundary <br /> of the site does not decrease to acceptable levels,within a reasonable timeframe, implementation of <br /> such a system or other remediation action alternative will be implemented. Data collected during the <br /> pilot test would be used to size a full-scale active vapor extraction system. <br /> URS will provide the SJCEHD with a work plan to implement the above activities within two weeks <br /> following your review of this remediation plan.Please contact URS with any questions, comments, or <br /> concerns regarding this remediation plan. <br /> Sincerely, <br /> rnior *vZil <br /> neer <br /> Enclosures: Table 1 <br /> Figure 1 <br /> c: Judy McCampbell(Radio Shack) <br /> K:\Wprocess\25532\WorldEnterprise\Remediation Plan\Letter.doc <br />