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• <br />0 <br />Alternative <br />Technical Effectiveness <br />Implementability <br />Cost <br />Overall <br />Effectiveness <br />Ranking <br />Biosparging <br />Effective in reducing <br />• Easily <br />Expected to <br />High <br />bulk mass of COPCs in <br />implementable; <br />be moderate <br />gravelly, sandy soil layer <br />• Should take no <br />based on the <br />but limited in silty and <br />more than six <br />expected level <br />clayey soil layer; <br />months after <br />of 0&M <br />• May take a long time to <br />completion of pilot <br />activities; <br />achieve target cleanup <br />test and system <br />Overall cost <br />goal; <br />design to begin <br />effectiveness <br />• Overall effectiveness — <br />treatment; <br />— high <br />moderate <br />• No air or POTW <br />permits needed, <br />minimizing lead <br />time required; <br />• Overall <br />implementability — <br />high <br />In-situ chemical <br />Effective in reducing <br />• Implementable but <br />Expected to <br />Moderate <br />oxidation <br />bulk mass of COPCs in <br />require a field pilot <br />be high due to <br />to high <br />gravelly, sandy soil layer <br />test to complete <br />amount of <br />but somewhat limited in <br />system design; <br />oxidant likely <br />silty and clayey soil <br />Should take no <br />used and the <br />layer; <br />more than six <br />need to <br />• May not take as long a <br />months after <br />address the <br />time as the other <br />completion of pilot <br />COPC in the <br />alternatives to achieve <br />test and system <br />silty and <br />target cleanup goal; <br />design to begin <br />clayey soil <br />• Overall effectiveness — <br />treatment; <br />layer, along <br />moderate to high <br />Fewer permits <br />with the <br />needed than <br />associated <br />groundwater pump <br />level of 0&M <br />and treat and air <br />activities; <br />sparging with SVE <br />Overall cost <br />— less lead time <br />effectiveness <br />before treatment <br />— moderate <br />begins; <br />• May require <br />additional system <br />control measures <br />depending on <br />permit <br />requirements; <br />• Overall <br />implementability — <br />moderate to high <br />Based on the results of the comparison among the alternatives on technical effectiveness, <br />implementability, and cost effectiveness, biosparging should be the preferred treatment <br />alternative for the site. <br />FS -Onsite Petroleum Hydrocarbon Remediation.doc 5-2 Shaw Environmental, Inc. <br />