Minutes & Attachments - Marine Corps Base Camp Pendleton

III. Technology Screening/Alternatives AnalysisGRA Technology Types Screening CommentsGroundwaterNo action Not applicable Retained, required by NCPIn situ treatmentBiological (e.g. in situ bioremediation), chemical (e.g. inRetained, in situ treatment techniques potentially effectivesitu chemical oxidation), physical (e.g. air sparging/soiland implementable.vapor extraction)Ex situ treatment Removal (on-site treatment or off-site disposal)Retained, ex situ treatment techniques potentially effectiveand implementable, principally in sources zones.MonitoringMonitored Natural AttenuationRetained, potentially effective and implementable for lowconcentration areasInstitutional controls Land-use restrictionsRetained, if required to address risk during long-termremediationAccess restrictions Engineering controls (fences, etc.) Due to depth of groundwater, eliminated as not applicableContainment Hydraulic control Plumes are largely stable based on long-term monitoringSoilNo action Not applicable Retained, required by NCPIn situ treatmentt tBiological (bioventing), physicochemical (insitusolidification, soil vapor extraction)Retained, potentially ti effective for source areasEx situ treatment excavation with on-site treatment or off-site disposal Retained, potentially effective for source areasMonitoringSoil gas monitoringEliminated, not applicable to high concentrations observed insource areasInstitutional controls Land-use restrictions Retained, potentially effective for source areasAccess restrictions Engineering controls Retained, potentially effective for source areasContainment Capping Retained, potentially effective for source areas21 NAS North Island Operable Unit 20 January 17, 2013