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i <br />' 5 Transfers volatile hydrocarbon constituents from the soil to the atmosphere <br />' 5 1 5 Land Farming Advantages <br />' 1 Requires a relatively short time frame to complete <br /> 2 Reduces future liability by eliminating disposal at a Class I or Class II sanitary <br /> Ilandfill <br /> 3 Soil can be backfilled upon attaining acceptable levels <br /> I4 Incorporates biodegradation of hydrocarbons as well as volatilization <br /> 5 Vapor emissions are controlled via carbon adsorption <br /> 6 Moderate cost <br /> I5 1 6 Land Farming Disadvantages <br /> 1 Initial set up is labor intensive <br /> I2 Permits and monitoring of vapor emission are required <br /> 3 Requires a large area for Iand farming piles <br /> 5 17 Disposal Advantages <br /> 1 Soil is removed from the site quickly <br /> I 5 18 Disposal Disadvantages <br /> P g <br /> II There may be future liability associated with Class I or Class II landfill disposal <br /> 2 High cost <br /> 52 Soil Vapor Extraction <br /> Soil vapor extraction involves the installation of vapor-extraction wells within the vadose zone The <br /> vapor-extraction wells are manifolded together and attached to a high-vacuum blower The vacuum <br /> transfers the adsorbed phase hydrocarbons to vapor phase, which is removed from the soils and <br /> treated via carbon adsorption or catalytic incineration prior to discharge to the atmosphere The <br /> advantages and disadvantages of soil venting are as follows <br /> 1'OC 1474 PAR10 %EACOR• <br /> NWW5-M2-01 May 31 1994 <br />