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1 <br /> Final Remedial Plan 7 September 1992 <br /> 3788 Tracy Boulevard Rev. : Dl <br /> Tracy, California P1745R005.WP <br /> table, one to two volumes of water will be pumped directly into a <br />' vacuum truck and removed from the site for disposal. <br />' ALTERNATIVE METHODS OF <br /> REMEDIATION <br />' The remediation method planned takes into account the <br />' nature of the subsurface, the type of contamination, requirements <br /> of the regulatory agencies, and cost effectiveness. Among <br /> alternative methods considered were the following: <br /> A. Excavation and Aeration of Soil Stockpiles <br />' Aeration of aboveground soil stockpiles would be a cost- <br /> s P <br /> effective treatment method with an estimated high rate of success <br /> for gasoline-bearing soil. Sufficient space is available at the <br /> site to permit soil stockpiling and turning. This is not an <br />' effective technique for oil--bearing soil. Until excavation <br /> commences it is uncertain how much gasoline-bearing soil also has <br /> oil. Additionally, San Joaquin Air Quality Management Board does <br /> not, at the present time, allow open aeration of gasoline-bearing <br /> soil in excess of one cubic yard. <br /> B. In-Situ Aeration of Soil <br /> Vapor extraction of subsurface soil in place (in-situ) <br /> has the same difficulty expressed above due to its inability to <br /> address the oil problem. In addition, the method is costly, time <br /> Iconsuming, and may leave significant residue even among the <br /> gasoline-bearing soil. <br /> I <br />