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I � <br /> r� <br /> TABLE 2: ESTIMATED CONSTRUCTION COSTS FOR REMEDIAL ALTERNATIVES <br /> STOCKTON UNIFIED SCHOOL DISTRICT <br /> FRANKLIN HIGH SCHOOL <br /> HLI0089003 ' <br /> ALTERNATIVE 1 -IN-SITU VAPOR EXTRACTION <br /> Assumptions: <br /> • Dimensions of soil to be remediated In place - 10-foot radius, 20 feet deep <br /> o Vapor extraction wells - 9 wells, 20 feet deep <br /> • Suitable electrical panel available at nearby building <br /> Estimated Cost: <br /> Vaper extraction wells and manifold piping <br /> 9 wells 0 $800 ea. $7,200 <br /> Blower and vapor recovery system <br /> 5 HP motor, 100 cfm pump, mist eliminator, <br /> two carbon canisters and gauges 8,000 <br /> Concrete foundation 1,000 <br /> Electrical panel and conduit 3,404 <br /> Fencing 1,400 a. . <br /> Air emissions permit 5,000 <br /> Engineering -Workplan, specifications, 15,004 <br /> closure report <br /> Contingency 0 20% 8,OD0 <br /> ESTIMATED COST FOR ALTERNATIVE 1 ULO 0.0 <br /> (rounded to nearest thousand) <br /> ALERNATIVE 2-EXCAVATIO A DO 1TE DIS AL <br /> Assumptions: <br /> • Volume of soil to be disposed of - 18-foot square, 20 feet deep, <br /> with 1.15 expansion factor (280 cu. yd.) <br /> • Volume of soil to be excavated and backfilled - 240 cu. yd. <br /> • No shoring required <br /> • Disposal facility - Class lI or III facility permitted for hydrocarbon fuels <br /> S <br />