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CESti <br /> path of impacted groundwater Cut-off walls can be used in conjunction with a treatment filter to <br /> create a funnel and gate system, in which the cutoff wails (the funnel) channel the COCs to the <br /> high conductivity treatment filter (the gate) The filter can be a zone of enhanced bioactivity or <br /> other treatment system such as nn-situ air stripping <br /> I Physical containment of the dissolved-phase hydrocarbon plume does not appear to be warranted <br /> at this time Groundwater monitoring data at the site, which began in June 1993, indicates that <br /> the hydrocarbon plume is generally stable <br /> IChemical Neutralization <br /> IChemical neutralization is commonly used for acidic or caustic wastes There are currently no <br /> feasible chemical neutralization technologies for fuel-related organic compounds <br /> Incineration <br /> Incineration can be performed both on-site (mobile unit) and off-site The process involves <br /> treating impacted soils with high temperatures (870 to 1200 °C) to volatilize and combust organic <br /> compounds Off-gasses and combustion residuals generally require treatment Impacted soils <br /> would have to be excavated and stockpiled on-site for incineration <br /> As discussed under the Excavation Option above, fiu ther excavation of the site is not feasible due <br /> to the depth of the impacted soils and the lack of space on-site for utilizing heavy equipment <br /> during excavation In addition, there is a lack of space on-site for stockpiling of soils and/or <br /> placement of a mobile incineration unit <br /> INo Action <br /> Under the No Action alternative, no further action would be taken to control or reduce the <br /> dissolved-phase hydrocarbon concentrations in the groundwater or to remedy residual soil <br /> impacts The assessment investigation has shown impacted groundwater is contained generally <br /> within the Canteen Facility property Compass desires to ensure that future risks and/or liabilities <br /> are minimized as a result of the existing conditions and, therefore, has chosen not to pursue the <br /> No Action alternative <br /> Other(New Technology) <br /> Air spargmg <br /> All of the COCl in the groundwater are strippable using air Therefore, air mjectnon (or spargnng) <br /> can be used to air strip the organics from the groundwater Air spargisg is an m-situ technology <br /> 8 <br /> I <br />