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E
<br />Supplemental LFG Emission Control System Cost Estimates for
<br />Preliminary Closure Cost Estimate
<br />The LFG Emission Control System will be constructed throughout the life of the landfill, and the majority of the system will be in place at closure.
<br />At closure, it is anticipated that a portion of the above -ground components will be rebuilt, and some of the vertical LFG Wells will be replaced.
<br />Specifically:
<br />2004 Cost 2008 Cost (3)
<br />9.1 Repair of above -ground field components at 30% of orginal const. at $178,000 (1) _ $53,400 $60,300
<br />9.2 Well Replacement Costs at 15% of well costs at $717,750 (2) = $107,663 $121,700
<br />(1) Sum of Items 1 and 2 from cost estimate below.
<br />(2) Subtotal of above -ground field components, from cost estimate below.
<br />(3) Factor 1.13 for 3% per year inflation for 4 years.
<br />LFG Emission Control System Cost Estimate
<br />North County Landfill
<br />13 LFG Flare station
<br />Subtotal, LFG Field $1,765,188'
<br />ea 1 $400,000'
<br />Total $2,165,188
<br />. Source: County
<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 />PCPMP for NCRCSL Department of Public Works/Solid Waste
<br />D-5 County of San Joaquin - Rev. 02 July 10, 2009
<br />Landfill Acreage 185
<br />No.
<br />Item
<br />Unit Cost
<br />Unit
<br />Qty
<br />Extn Note
<br />1
<br />Vertical wells 10 contingency wells
<br />$65
<br />LF
<br />3500
<br />$227,500 For special gas issues
<br />2
<br />Horizontal wells 24 wells in two layers
<br />$25
<br />LF
<br />19610
<br />$490,250 Primary gas collection
<br />3
<br />Buried 10" gas, 1" air & 2" water HDPE
<br />$28
<br />LF
<br />12000
<br />$336,000 Looped perimeter header
<br />4
<br />Sumps with header sample ports
<br />$12,000
<br />Each
<br />12
<br />$144,000 In the header system
<br />5
<br />Perimeter monitoring wells
<br />$6,000
<br />Each
<br />15
<br />$90,000 1000 foot spacing (2)
<br />6
<br />Misc items and contingency (1)
<br />$299,438
<br />LS
<br />1
<br />$299,438
<br />Subtotal, buried
<br />field components
<br />$1,587,188
<br />7
<br />Header Valves and well connections
<br />$1,226
<br />Each
<br />46
<br />$56,400
<br />8
<br />Above -ground Lateral pipe - 4" HDPE
<br />$5
<br />LF
<br />1000
<br />$5,000
<br />9
<br />Above -ground Subheader pipe 6" & 8" HDPE
<br />$13
<br />LF
<br />1000
<br />$13,000
<br />10
<br />Above -ground Header pipe 12" HDPE
<br />$22
<br />LF
<br />0
<br />$0
<br />11
<br />Condensate Return Drains
<br />$2,000
<br />Each
<br />34
<br />$68,000
<br />12
<br />Misc items and contingency (1)
<br />$35,600
<br />LS
<br />1
<br />$35,600
<br />Subtotal, above
<br />-ground
<br />field components
<br />$178,000
<br />13 LFG Flare station
<br />Subtotal, LFG Field $1,765,188'
<br />ea 1 $400,000'
<br />Total $2,165,188
<br />. Source: County
<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 />PCPMP for NCRCSL Department of Public Works/Solid Waste
<br />D-5 County of San Joaquin - Rev. 02 July 10, 2009
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