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J <br /> TABLE 2• ESTIMATED CONSTRUCTION COSTS FOR REMEDIAL ALTERNATIVES (cont.) <br /> STOCKTON UNIFIED SCHOOL DISTRICT <br /> FRANKLIN HIGH SCHOOL <br /> HLI 0089003 <br /> Estimated Cost: <br /> Excavate and stockpile soil <br /> 240 cu. yd. 0 $10/cu. yd. $2,400 <br /> Load and dispose of soil <br /> 280 cu. yd. Q $100/cu. yd. 28,000 <br /> Import and backfill clean soil <br /> 240 cu. yd. 0 $15/cu. yd. 3,600 <br /> Contractor mobilization and demobilization 2,000 <br /> Analytical costs (20 samples) 2,500 <br /> Fencing 500 <br /> Engineering - Work plan, specifications, closure 13,000 <br /> report <br /> Contingency 0 15% 7,800 <br /> ESTIMATED COST FOR ALTERNATIVE 2 6Q QQQ <br /> (rounded to nearest thousand) <br /> ALTERNATIVE 3 -EXCAVATION AND OFFISTE TREATMENT BY VAPOR EXTRACTION <br /> Assumptions: <br /> • Volume of soil to be treated - 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 /> • Treatment to be conducted at District Corporation Yard <br /> Soil to be spread on plastic sheeting, perforated plastic pipe to be embedded, <br /> soil to be covered with plastic sheeting, and vapors to be withdrawn by <br /> vacuum pump and discharged to air after pasing through carbon canisters <br /> • Soil to be mounded three feet high in an area 50 feet by 50 feet <br /> Estimated Cost: <br /> Excavation and Backfilling Costs <br /> Excavate and stockpile soil <br /> 240 cu. yd. 0 $10/cu. yd. $2,400 <br /> Load and transport soil to Corportation Yard <br /> 280 cu yd. 0 $7/cu. yd. 2,000 <br />