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1 <br /> t 4 FEASIBILITY STUDY <br /> ! The objective of the feasibility study is to evaluate the technical and economical feasibility <br /> of remediation alternatives available for the Corral Hollow Sanitary Landfill. EMCON <br /> evaluated alternatives capable of remediating the groundwater impacted by VOCs and <br /> integrated them to site specific factors such as, extent of impact to the groundwater, local <br /> hydrogeology, implementability, effectiveness, and cost. The results of a feasibility study <br /> conducted for the Corral Hollow Sanitary Landfill are presented in this section. <br /> This feasibility study was prepared generally consistent with the requirements of the <br /> National Contingency Plan for Comprehensive Environmental Response, Compensation, <br /> and Liability Act (40 CFR 300.430), and the Resource Conservation and Recovery Act <br /> (RCRA), Subtitle D requirements (40 CFR 258.57). These documents were utilized <br /> because Article 5 does not include detailed guidelines for feasibility studies. <br /> ■ 4.1 Alternatives Description <br /> ■ The following table summarizes the alternatives for remediating the impacted groundwater <br /> at Corral Hollow Sanitary Landfill and resulting action required for their implementation. <br /> These alternatives are described in detail under respective section headings. <br /> ' Alternative Action <br /> No action Continued monitoring of groundwater <br /> Source Control Construct final cover cap for entire landfill <br /> Groundwater Extraction and Treatment Extract and treat impacted groundwater from <br /> MW-5 area and spray evaporate over site <br /> Physical Barrier Construct a slurry wall downgradient of MW-5 area <br /> 4.1.1 No Action <br /> 1 This alternative does not involve any remedial action. Groundwater would continue to be <br /> monitored to evaluate changes in water quality attributable to the landfill release. Since <br /> available data suggest the nature and extent of the VOC release is relatively small <br /> SAC1N:\PJO�093M390031.9BG-94\sdg:I Rev.0,4/20/95 <br /> 0939.003.19 4-1 <br />