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Mum = M M M <br /> TABLE 9 <br /> SOIL AND GROUND WATER CORRECTIVE ACTION ALTERNATIVES <br /> Former Chase Chevrolet (Van Buten) Facility <br /> 424 North Van Buren Street, Stockton, California <br /> Estimated Costs <br /> Typical <br /> Method Advantages Disadvantages (incl _ Monitoring Estimated <br /> Monitoring and Duration <br /> Maintenance) Requirements <br /> UST No -1 (cont ) <br /> Natural Attenuation • Lower costs than most active •Not effective for higher $6,000 to$8,000 Installation of unknown <br /> (Soil) remedial alternatives• Minimal contaminant concentrations •i annually additional borings, <br /> disturbance to the site• PotentEal Migration of contamination Ground water <br /> use below structures may occur• Longer time tramc monitoring <br /> than active remediation - May <br /> not achieve cleanup levels <br /> within reasonable length of <br /> time <br /> Atte,uti.crl GcoLiis ironmentat,Inc <br />