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2905 West Benjamin Holt Drive, Stockton, California March 16, 1994 Chevron U.S.A. Products Company Page 13 444 5.0 COST BENEFIT ANALYSIS OF CORRECTIVE ACTION ALTERNATIVES 5.1 Overview The total cost of each corrective action alternative is compared as a relative measure. Total costs of each alternative are based on the sum of capital and operating costs. Capital costs are one-time fees for equipment and/or services. Operational costs are fees incurred on a regular basis over the lifetime of the project. Operational costs are highly variable and sensitive to the estimated lifetime of the project. In addition to the cost analysis, the benefits of each corrective action alternative are briefly discussed below. 5.2 Source Removal, Isolation, and Groundwater Monitoring and Sampling Costs associated with the source removal, isolation, and groundwater monitoring and sampling alternative include the following: f Capital Costs Subcontractor, consulting, and laboratory fees for delineation borings and additional groundwater monitoring wells Operational Costs Consulting and laboratory fees for groundwater monitoring and sampling of the site-related groundwater monitoring wells In addition to soil borings to delineate the lateral and vertical extent of hydrocarbon-impacted soil, one or more additional groundwater monitoring well would be required to assure containment of the E contaminant plume. Capital costs are low in comparison to the capital costs of hydrocarbon mass removal aeration technologies. The operating costs of the source removal/isolation alternative could be k high depending on the negotiated lifetime,of the groundwater monitoring and sampling program. The benefits of this alternative include the ability to avoid higher cost remedial technologies and the relatively low impact caused to existing service station business. 5073PAR.RPT � ��'._ GROUNDWATER I,!L.J _i TECHNOLOGY