ARCHIVED REPORTS_XR0010990 - Laserfiche WebLink

Home Browse Search

GROUNDWATER GENERAL REMEDIAL SCREENING RESPONSEACTION TECHNOLOGY PROCESS OPTIONS EFFECTIVENESS IMPLEMENTABILITY COST COMMENTS No-Action None Nie Does not achieve remedial action objectives. May be implemented at sites with regulatory agency No cost to McClellan None. acceptance. AFB.Potentially significant cost for offsite property owners. ictions Land Use RestrEffective at preventing direct exposure to contamination. Implementable as proprietary controls or govemmental Low cost to McClellan None. This option alone does not achieve remedial action controls.Successful implementation of governmental AFB.Potentially objectives because contaminant migration is not controls requires a willingness of local government significant cost for Access Restrictions prevented.Long-term effectiveness depends on continued to adopt and enforce them. offsite property future implementation. owners. Land Purchase Effective at preventing direct exposure to contamination. May be difficult to implement.Purchase must be Moderate to None. This option alone does not achieve remedial action negotiated with current land owners. high cost. objectives because contaminant migration is not prevented.Long-term effectiveness depends on continued future implementation. Institutional Actions Alternate Water Alternate Water Su I Effective at preventing direct exposure to contamination. Implementable. Moderate capital cost, None. Supply Pp y This option alone does not achieve remedial action low maintenance cost, objectives because contaminant migration is not prevented.Long-term effectiveness depends on continued future implementation. Monitoring Groundwater Monitortn Effective at tracking contaminants in groundwater Easily implementable. Low to moderate None. g and verifying attenuation.Does not remediate capital cost,low contamination. maintenance cost. Monitored Natural Monitoring! Groundwater Monitoring Effective at verifying contaminant attenuation,but does Implementable for petroleum.Potentially Low capital cost,low None. Attenuation Verification not actively remediate contamination. implementaWeforVOCs,if a reduction in contaminant maintenance cost. mass,concentrations,and plume size can be demonstrated. Vertical Extraction Walrs Effective method of groundwater extraction,if sufficient Implementable,limited by permeability of strata. Low to moderate None. saturated thickness exists;vertical wells capital cost,low are proven technology. maintenance cost. Horizontal Extraction Wells Effective method of groundwater extraction from a large Implementable,but less se than for vertical wells Moderate to high None. Containment Hydraulic Barrier area. Horizontal wells are recently developed technology, because requires directronal drilling with specialized capital cost,low and may be more effective than vertical wells in certain equipment.May be useful when site access is limited, maintenance cost. circumstances. Extraction and Injection Effective method of gmundwater extraction and hydraulic Implementable with regulatory agency acceptance. Moderate capital cost None. Wells control.Design must take into amwnt local hydrogeologic Could require complex well system. Moderate conditions. maintenance cost. Vertical Groundwater Effective method of groundwater extraction,if sufficient Implementable;limited by permeability of strata. Low to moderate None. Extraction Wells saturated thickness exists;vertical wells are proven capital cost,low technology. maintenance cost. Horizontal Groundwater Effective method of groundwater extraction from a large Implemenlable;more difficult than vertical wells since Moderate to high None. - Extraction Well area.Horizontal wells are recently developed technology, requires directional drilling.May be useful when site capital Cost,low and may be more effective than vertical wells in certain access is limited. maintenance cost. Groundwater circumstances. Collection ExtractionEffective for removal of VOCs from both the vadose zone Implementable. Low to moderate None. Dual-Phase Extraction and the groundwater. capital and maintenance cost. High Vacuum 2 Phase Not effective at producing high well vacuum at the Implementable;patented process entails restrictions Low to moderate Screened out due to 6ktraction Well(patented groundwater depths found at McClellan AFB. on use. capital and lack of effectiveness rocess) maintenance cost. producing high well LEGEND vacuum. 0 Potentially elfedive,implementable,and oostaraefive Tachro*ya Process Option. ® FIGURE 3-5(Page 1)Technology andlar Praraas Option sd'ewed out an the baso of etrec5venass,implementabiGy.ands m-� EVALUATION OF GROUNDWATER I'mcessopremmnsidemdmnovative. REMEDIATION TECHNOLOGIES AND PROCESS OPTIONS Boldface indltimt RepreaenhWrr Technology or Process Optim VOC FEASIBILITY MOY 4n-w FRESWIe a MCCLELLAN AIR FORCE BASE,CALIFORNUI CH2MHILL