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INTERNATIONAL TECHNOLOGY CORPORATION <br /> Design requirements for a remedial SVE system can be estimated based on Figures 4 and 5. <br /> Figure 4 shows that the extraction system must be able to achieve a minimum well head <br /> vacuum of about 3 inches of water column to result in a flow rate of 100 cubic feet per <br /> minute. Figure 5 shows that a 100 cubic feet per minute air flow rate would provide more <br /> than enough soil gas flow to achieve the necessary 85 foot radius. <br /> 3.3 Calculations - Hydrocarbon Recovery Rates <br /> The expected initial hydrocarbon recovery rates were estimated as follows: <br /> 93f0 x .0283riPx 2900 1g�X 1Ib x 1440minutes= 24lbs <br /> minute ft3 m3 1000mg 454g 1day day <br /> tPrevious experience at other sites has typically shown a marked drop in well head <br /> hydrocarbon concentrations after approximately two months of VES operation. Based on <br /> these experiences, the hydrocarbon recovery rate would be expected to drop to about 2 <br /> pounds per day after the fust two months of operation. <br /> MZj03-l0-9z([ST)0 NM 6 <br />