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R10/71-51-1C 3 Containment In Situ containment of contaminated soils Involves the placement of engineered barriers around the contaminated soils to isolated them from groundwater and to minimize the infiltration of surface water into the waste containment 4 Removal and Contaminated soils are removed from the site by excavation Disposal At the off-site disposal area, the soil may be landfilled or treated by bioremediation, oxidation soil washing 1 5 Treatment Vapor extraction system (VES) The contaminant laden air may be treated by carbon adsorption, incinerated, catalytically oxidized, or simply vented into the atmosphere VES is the I process by which volatile compounds are removed from the in-place soil through the utilization of forced (hot air or stream) or drawn air currents TABLE 15. REMEDIAL ACTION OPTIONS FOR GROUNDWATER GENERAL REMEDIAL ASSOCIATED REMEDIAL ACTION OPTIONS APPROACHES ' 1 No Action Passive remediation involves no action at the site for groundwater This type of remediation relies upon several natural processes to destroy the compounds of interest These natural processes include biodegration, ' volatilization, photolysis, leaching, and adsorption 2 Source Controls Identify and repair leaks or remove leaking tank This work has already been performed at the Shop 10 Facility and is not considered further ' 3 Containment and Install hydraulic barriers Recover and treat contaminated groundwater Treatment Implement long-term groundwater monitoring The depth to groundwater precludes the use of this alternative ' 4 Treatment Pump from one or more recovery wells to collection point Treat biologically, by air stripping, by carbon absorption, by coalescing, or other suitable methods Dispose of treated groundwater into POTW, stormwater ' sewer, or recharge/irrigate on site 24 1