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f Harding Lawson Associates <br /> r <br /> B. Scils <br /> ,., We recommend that soil-venting initially be pursued for soil <br /> remediation. This alternative will allow for the maximum recov- <br /> ery of hydrocarbon constituents present in the vadose zone, while <br /> 3. <br /> causing a minimum of physical disturbance to the site and its <br /> I <br /> operations. Once in .operation, itis anticipated that the system E <br /> « will be able to develop a horizontal zone of influence that will <br /> } r capture .hydrocarbons that may be <br /> ( present in the sails that. lie <br /> under the building. Gases. withdrawn from the vadose zone will be <br /> ; <br /> passed through a carbon treatment unit prior to discharge into <br /> In <br /> the atmosphere. Additionally, as discussed below, a ground-water <br /> remediation.' <br /> :system be incorporated into the design of the <br /> soil-venting system. The result of <br /> - reme- <br /> piggy piggy-backing <br /> that <br /> ion system �n the <br /> Y ground-watez remediation system can result i <br /> f � in a 'substantial. cost savings and an increased operational effi- <br /> ciency of the venting system. <br /> a <br /> L_j <br /> - - - <br /> r <br /> 1,% <br /> 3 i <br /> �E <br /> y <br /> 22 <br /> #^ .. <br /> 1111 mill ami 1 11111111 N <br />