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GROUNDWATER GENERAL REMEDIAL SCREENING RESPONSEACTION TECHNOLOGY PROCESSOPTIONS EFFECTIVENESS IMPLEMENTABILITY COST COMMENTS Tests of this process at McClellan AFB demonstrate Implementable. Requires the maintenance of high Moderate capital cost None greater destructive removal efficiencies and lower nitrogen temperatures,but does not use aflame.Offgas Low operations and Vapor-Phase Ex Situ owde emissions than comparable catalytic oxidation treatment to remove hydrochloric acid may be maintenance cost. Treatrnent PhysicaliChemical systems. required. Treatment Degradation of some chlorinated VOCs has been Implementable. No full scale systems are currently Moderate capital cost None demonstrated during field testing, in operation. Low operations cost. Discharge to Effective.Requires the least pretreatment of all discharge Implementability depends on cooperation.of local Low to moderate cost. None Treatment Works altematives. govemment Existing sanitary sewer lines are near Less pretreatment is capacity. required.However,the sewer connection fee may be substantial, Discharge.lo Effective.However,requires high level of treatment to Implementable. Low cost,assuming Currently used at Surface Water meet discharge requirements and protect ecological water has been McClellan AFB, receptors. treated to standards. Aquifer Injection Effective.However,requires high level of treatment. Implementable with regulatory agency acceptance. Moderate Cost, Norte Aquifer injection may move groundwater contamination assuming water has with• been treated to DLsposallReuse Treated Groundwater standards.Ongoing Discharge maintenance of pump and injection wells required. Deep Well Injection Effective. Implementable with regulatory agency acceptance. High capital cost to drill Screened out based and construct deep on cost. injection well.Ongoing maintenance cost. Irrigation Reuse Effective.However,requires high level of treatment to Implementable. Low cost,assuming None meet discharge requirements and protect ecological water has been receptors.Demand is seasonal. treated to standards. Sell to Water Districts Effective if the treated water achieves drinking water Implementable.However,the Department of Health Low cost,assuming None standards. Services,Office of Drinking Water,has expressed water has been concems regarding the sale of treated groundwater treated to standards. as a domestic water supply. LEGEND Fofondall erreOYO,bllplernertable,sod omlt ffodn Tatlrmlcgy or Pros Opdm. TedxrotogY ander Process option soeened Dolan the bus d eiTaAveness,imwernentahaay,antllor coals. FIGURE 3-5(Page 5)EVALUATION.OF GROUNDWATER Pmo es oAdm considered innwafi e. REMEDIATION TECHNOLOGIES AND PROCESS OPTIONS Boldface indlrades Repnmantaerce Technology or Press Option. VOC FEASIBILITY MDY ; mrneoMxDs McCLELIAN AIR FORCE BASE,CALIFORNIA CH2MHILL