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Table 1. Coinparative evaluation of remedial alternatives for the General Services Area. <br /> Overall protection of Long-term <br /> human health and Compliance effectiveness and Reduction in volume, <br /> Alternative environment with ARARs permanence toxicity,and mobility Short-term effectiveness Implementability Costa <br /> Alternative 1 Human health: No Criterion may Not effective. Dependent on natural No immediate impact to Implementable 4.27 <br /> No Action Environment: No be meth attenuation and general public. <br /> degradation. Protective equipment may be <br /> required during well <br /> monitoring. Site risks not <br /> addressed. <br /> Alternative 2 Human health: Criterion may Effective for Dependent on natural No impact to general public. Implementable 4.57 <br /> Exposure Air. No be meth ground water risks attenuation and Protective equipment may be <br /> control Ground water: Yesc at existing water- degradation. required during well <br /> Environment: No supply wells. installation. Addresses ground <br /> water risk with point-of-use <br /> treatment or replacement of <br /> existing water-supply wells. <br /> Alternative 3a Human health: Criterion may Effective for air and Reduction in shallow No impact to general public. Implementable 18.05 <br /> w <br /> Remediation Air: Yes be met ground water risks. unsaturated zone,and Protective equipment may be <br /> and protection Ground water: Yes Ground water and shallow and deep required during construction <br /> of the regional soil vapor aquifer activities. Addresses site risks <br /> aquifer Environment: Yes extraction increases contamination; with active remediation of soil <br /> source removal partially dependent and ground water. <br /> effectiveness. on natural attenuation <br /> and degradation. <br /> Alternative 3b Human health: Criterion met Effective for air and Reduction in shallow No impact to general public. Implementable 19.75 <br /> Ground water Air: Yes ground water risks. unsaturated zone,and Protective equipment may be <br /> and soil Ground water: Yes Ground water and shallow and deep required during construction <br /> or <br /> remediation soil vapor aquifer activities. Addresses site risks <br /> Environment: Yes extraction contamination. with active remediation of soil <br /> addresses all soil and ground water. <br /> and ground water <br /> contamination. <br /> a Estimated total present worth in millions of 1995 dollars. Overall cost is highly dependent on the required length of pumping time. <br /> b Relies solely on natural attenuation and degradation to comply with Safe Drinking Water Act,Basin Plan,and State Resolutions 68-16 and 92-49. <br /> c Protective of human health for ingestion of groundwater from existing water-supply wells. <br />