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TABLE 3-4. COMPARISON OF GROUNDWATER REMEDIATION <br /> TECHNOLOGIES <br /> Technology Description Advantages Disadvantages <br /> Vapor Extraction Removal of volatile Proven technology if Limited to organics <br /> (VES) organic compounds treatment is not which are volatile at <br /> (VOCs) by application required. Treatment rate ambient conditions <br /> of a vacuum to a system can be fast for volatile Non homogeneity of <br /> of extraction wells components Treatment subsurface may lead to <br /> may enhance insitu channeling and uneven <br /> biodegradation of treatment Detailed <br /> organic contaminated knowledge of <br /> sods subsurface is needed <br /> May be applicable to <br /> contaminated sods at <br /> the site <br /> Groundwater Extracted VOCs can be Prevents off-site Requires treatment of <br /> Contamination vented, incinerated or migration of extracted groundwater. <br /> Extraction/On-Site catalytically oxidized contaminants Well- Treatment can be <br /> Treatment Plume Control by suited for immediate accomplished using an <br /> installation of a series application at the 102 S air stripping column <br /> of hydraulic controls Wilson Way site Both This alternative may <br /> Controls may consist of dissolved-and free- require air and infection <br /> a series of extraction phase hydrocarbons can well permits, and <br /> wells, or cut-off be recovered. Existence additional costs for <br /> trenches Monitoring of on-site cut-off trench ongoing monitoring and <br /> downgradient of the could reduce pumping. <br /> system is required to construction costs <br /> assess effectiveness. <br /> This alternative can be <br /> combined with the <br /> recovery and recycling <br /> of free product <br /> 14 <br />