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LFG System Cost Estimate <br /> _Foothill Landfill _ <br /> Rev March 16, 2005 <br /> Landfill Acreage 67.3 <br /> No. Item Unit Cost Unit Qty Extn Note <br /> 1 Vertical wells 35 contingency wells $65 LF 3500 $227,500 For special gas issues <br /> 2 Horizontal wells 52 wells in two layers $25 LF 70720 $1,768,000 Primary gas collection <br /> 3 Buried 12" gas, 1"air&2"water HDPE $34 LF 22080 $750,720 Looped perimeter header <br /> 4 Sumps with header sample ports $12,000 Each 20 $240,000 In the header system <br /> 5 Perimeter monitoring wells $6,000 Each 25 $150,000 1000 foot spacing (2) <br /> 6 Misc items and contingency 1) $746,555 LS 1 $746,555 <br /> Subtotal, buried field components $3,882,775 <br /> 7 Header Valves and well connections $1,314 Each 74 $97,200 _ <br /> 8 Above-ground Lateral pipe-4" HDPE $5 LF 2000 $10,000 <br /> 9 Above-ground Subheader pipe 6" &8" HDPE $13 LF 2000 $26,000 <br /> 10 Above-ground Header pipe 12" HDPE $22 LF 0 $0 <br /> 11 Condensate Return Drains $2,000 Each 52 $104,000 <br /> 12 Misc items and contin enc (1) $59,300 LS 1 $59,300 <br /> Subtotal, above-ground field components $296,500 <br /> Subtotal, LFGField $4,179,275 <br /> 13 LFG Flare station ea 1 $500,000 <br /> Total $4,679,275 <br /> LFG System construction occurs throughout the life of the landfill, and is not a component of the Closure cost. <br /> (1) Includes budget to install additional wells to control.isolated LFG emission problems. <br /> (2) Assumes no future development near the landfill <br /> (3) Costs in 2004 dollars <br /> LFG Component of Closure Cost Estimate <br /> Repair of above-ground field components 30% of orig cost $88,950 <br /> Repair of below-ground field components 5% of orig cost $194,139 <br /> Closure Costs $283,0$9 <br />