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GeoSyntec Consultants
<br />Table 5-1
<br />Estimated Partial Final Closure
<br />And Post -Closure Maintenance Costs
<br />1999 Dollars
<br />WMU B, Forward Landfill
<br />Estimated
<br />Unit Cost
<br />Estimated Total
<br />Item
<br />Quantity
<br />($)
<br />Cost ($)
<br />Subgrade preparation; Interim hay/straw placement and
<br />18.8 Acres
<br />N/A
<br />Forward will perform work
<br />vegetation
<br />Regrade and flatten south slope to 2H:1 V
<br />-2 Acres
<br />N/A
<br />Forward will perform work
<br />Check existing foundation layer thickness; Place 2 -ft thick
<br />-6 Acres
<br />N/A
<br />Forward will perform work
<br />foundation layer/intermediate soil cover as required.
<br />Place 2 -ft thick foundation layer over new 31LIV slopes
<br />42,150 cy
<br />N/A
<br />Forward will 2erform work
<br />1 -ft Admixed Com acted Clay Liner
<br />30,350 c
<br />$151cy
<br />$455,250
<br />Geocom osite Drains a Layer
<br />210,000 sf
<br />$0.50/sf
<br />$105,000
<br />1 -ft Vegetative Layer
<br />31,730 c
<br />$6/c
<br />$190,380
<br />Hydroseeding
<br />18.8 acres
<br />$1,500/acre
<br />$28,200
<br />2 -in. organic layer over hydroseedinE
<br />5,060 c
<br />$8/cy
<br />$40,450
<br />24 -in dia. corrugated HDPE 2ipe
<br />2,000 ft
<br />$13.05/ft
<br />$26,100
<br />18 -in dia. corrugated HDPE pi2e
<br />1,785 ft
<br />$8.90/ft
<br />$15,900
<br />12 -in dia. corrugated HDPE pipe
<br />780 ft
<br />$4.65/ft
<br />$3,600
<br />Pie elacementfbackfill (4 -ft wide x 5 -ft deep trench)
<br />2,700 linear ft
<br />$10/c
<br />$20,000
<br />Rock enerEy dissipaters
<br />400 sf
<br />$8/sf
<br />$3,200
<br />Flared end sections
<br />13
<br />$200/ea
<br />$2,600
<br />Catch basins
<br />10
<br />$10,000
<br />Pipe anchorage assemblies
<br />20
<br />$2,000
<br />Develop construction drawings, specifications, and bid
<br />1
<br />$50,000
<br />package
<br />Construction management/CQA Inspection and testing
<br />1
<br />$100,000
<br />activities
<br />E$5,OOO/yr
<br />WMUB Partial Final Closure Subtotal
<br />$1,052,700
<br />Final cover maintenance
<br />30 r
<br />$150,000
<br />Drains e system maintenance
<br />30 r
<br />$150,000
<br />Leachate control maintenance
<br />30 yr
<br />$15,000/yr
<br />$450,000
<br />Landfill gas monitoring
<br />30 yr
<br />$10,000/ r
<br />$300,000
<br />Groundwater and vadose zone monitoring
<br />30 yr
<br />$50,000/yr
<br />$1,500,000
<br />Site security
<br />30 yr
<br />$10,000/ r
<br />$300,000
<br />Subtotal
<br />$2,850,000
<br />WMU B, Post -Closure Maintenance Subtotal
<br />17%
<br />$2,850,000
<br />$484,500
<br />Partial Final Closure Subtotal
<br />$1,052,700
<br />Post -Closure Maintenance Subtotal
<br />$484,500
<br />20% Contin enc Eer §21820, Title 27
<br />$307,400
<br />Total Estimated Cost (in 1999 Dollars)
<br />$1,844,600
<br />J:\ALLIED\FORWARD\CLOSUREPLAN\REPORT
<br />5-2
<br />99.11.30
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