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c The soil excavation approaches are significantly more difficult to implement since <br /> additional measures are required to protect structures on the site including the <br /> roadways, sidewalks and building The excavation will also result in more business <br /> disruption, more traffic in the area and the production of a significant quantity of waste <br /> asphalt, concrete and other materials which would require disposal <br /> d Vapor extraction will result in controlled destruction of the hydrocarbon constituents <br /> ' with limited release to the environment <br /> 8.0 EVALUATION OF REMEDIATION ALTERNATIVES - DIESEL <br /> To examine and evaluate alternatives for the diesel hydrocarbon impacted soil the same four <br /> alternatives were reviewed as discussed in Section 7 0 A no-action alternative has been determined <br /> ' to be unacceptable for this site based on a General Risk Appraisal performed in accordance with the <br /> California LUFT Manual (1988) In-situ removal of hydrocarbon from the affected area using vapor <br /> extraction techniques is also deemed unacceptable due to the less volatile properties of diesel and thus <br /> vapor extraction would be ineffective Therefore, only two remediation approaches for the diesel <br /> impacted soils were considered These include, (1) excavation of the diesel impacted soil followed <br /> i <br /> by on-site biotreatment, (2) excavation of the hydrocarbon impacted soils followed by disposal to an <br /> ' appropriate solid waste facility <br /> I <br /> ' The two remediation alternatives, although similar, were again evaluated according to the cntena listed <br /> below <br /> 1 � <br /> 1 Level of protection of human health and the environment, including beneficial uses of ground <br /> and surface waters <br /> I <br /> 2 Reduction of toxicity, mobility and volume of contaminants <br /> 3 Compliance with regulatory guidelines <br /> ' 4 <br /> Cost effectiveness <br /> ' $ Short term effectiveness <br /> R-042992 TJL 14 <br /> 1 <br /> 1 � <br />