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rr ■r r r r r rr r r r� r r rr r r� r r� <br /> FIGURE 4 <br /> 7-ELEVEN STORE NO 14117 <br /> FEASIBILITY COST COMPARISON <br /> Remediation Overall Estim Time Health/Safety Site Uses <br /> MatrixRemediation <br /> Feasibility to Rem Risks Affected Cost Advantages Disadvantages <br /> Soil Excavation Less feasible 2-3 weeks+ Excavation- Cannot use site $300,000- Rapid remediation Can generate long-term <br /> post- associated for duration of $500000 liability(hauling) Possible <br /> remediation hazards,caving field work High odor complaints, unsightly <br /> groundwater of sidewalls, revenue loss to Safety hazards due to <br /> monitoring need to protect service station excavation <br /> adjacent manager <br /> structures from Financial cost does not <br /> collapse include loss of revenue due <br /> to facility shutdown <br /> Soil& In situ ASlSVE Feasible 2 yrs duration Low direct Limited $250,000- Low long-term Capital cost relatively high <br /> GW health risks equipment $300,000 liability,beneficial unless mobile equipment <br /> when operating space wlcapital use little affected used <br /> properly cost <br /> <$250,000 <br /> wlmobde <br /> equipment <br /> Soil& Dual Phase Most feasible 2 yrs duration Low direct Limited $300,000- Low long-term Dedicated installations have <br /> GW Extractionllntrinsic health risks equipment $350,000 lability, beneficial relatively high capital cost <br /> Biodegradation when operating space wlcapital cost use little affected <br /> properly Recovered groundwater will <br /> <$200,000 if need to be treated prior to <br /> using mobile discharge resulting in <br /> equipment increased lability, unless <br /> mobile process used <br />