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Incineration Incineration can be performed both on-site mobile unit and off-site The process involves I p ( ) treating impacted soils with high temperatures (870 to 1200°C) to volatilize and combust organic compounds Off-gasses and combustion residuals generally require treatment Impacted Isoils would have to be excavated and stockpiled on-site for incineration As discussed under the Excavation Option above, further excavation of the site is not feasible I due to the depth of the impacted soils and the lack of space on-site for utilizing heavy equipment during excavation In addition, there is a lack of space on-site for stockpiling of soils and/or placement of a mobile incineration unit No Action Under the No Action alternative, no further action would be taken to control or reduce the dissolved-phase hydrocarbon concentrations in the groundwater or to remedy residual soil impacts The assessment investigation has shown impacted groundwater is contained generally within the Canteen Facility property Compass desires to ensure that future risks and/or liabilities are minimized as a result of the existing conditions and, therefore, has chosen not to pursue the No Action alternative I Air sparging All of the COCs in the groundwater are strippable using air Therefore, air infection (or sparging) can be used to air strip the organics from the groundwater Air sparging is an in-situ technology for the transfer of organic compounds from the dissolved phase to the vapor phase Sparging requires two components in order to control the remediation process Air must be sparged into the groundwater to provide thorough contact of the air with the impacted groundwater A vacuum must be applied to the soils above the water table to withdraw the vapor emitted from the saturated aquifer materials This vacuum system can also serve to remove COCs in the vadose zone Treatment of the off-gas is usually required However, the groundwater is treated m-situ Air sparging is a viable option for implementation at the site In-Situ Well Aeration In-situ well aeration is similar to air sparging in that groundwater is treated by the transfer of organic compounds from the dissolved-phase to the vapor phase Air is injected into a double- screened well, lifting the water in the well and forcing it out the upper screen Simultaneously, additional water is drawn into the lower screen As the air bubbles rise to the water surface, the vapors are drawn off and treated by an SVE system This vacuum system can also serve to remove COCl in the vadose zone Treatment of the off-gas is usually required However, the groundwater is treated in-situ In-situ well aeration is a viable option for the site ttiF.GU�,�o u ��L�CES♦�