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I <br /> at a proper facility Aeration, by turning the soil pile, allows for volatilization of hydrocarbon <br />' constituents to the atmosphere Land farming incorporates biodegradation of hydrocarbons as well <br /> as vapor emission control The soil can be treated on-site via aeration or land farming If the soil <br />' cannot be treated on site, it would require off-site disposal at a Class I or Class II sanitary landfill <br /> The advantages and disadvantages of soil excavation are as follows <br /> 1 <br /> 5 1 1 Soil Excavation Advantages <br />' 1 Rapid removal of hydrocarbons from the vadose zone <br /> 2 Eliminates overlying hydrocarbons from leaching into groundwater <br /> I <br /> 5 12 Soil Excavation Disadvantages <br />' 1 Unearths hydrocarbon impacted soils, which would increase public health exposure <br /> 2 High public visibility during excavation <br /> 3 Moderate to high costs <br /> 4 Disrupts current business operations <br /> The advantages and disadvantages of on-site aeration, land farming, and disposal are as follows <br /> I5 1 3 On-site Aeration Advantages <br /> I1 Requires a relatively short time frame to complete <br /> 2 Reduces further liability by eliminating disposal at a Class I or II sanitary landfill <br /> 3 Soil can be backfilled upon reaching acceptable levels <br /> 4 Low to moderate costs <br /> 5 14 On-site Aeration Disadvantages <br /> I1 Aeration criteria allows for limited amount of soil treatment per time period, based <br /> on hydrocarbon levels <br /> 2 Requires a large area to store aeration piles <br /> 3 Frequent visits are required with heavy equipment needed to turn the soil pile <br /> 4 Will not effectively remove any non-volatile constituents <br /> ""C"',PAR C] SFACOA• <br /> N0005-002-01 7 �.MY 3l 1996 <br /> I <br />