Laserfiche WebLink
Preliminary Closure Cost Estimate <br />(continued) <br />Table 2 Notes: <br />AC denotes acre. <br />CY denotes cubic yard. <br />LS denotes lump sum. <br />SF denotes square foot. <br />UCB denotes Unit Cost Basis (see attached table). <br />All Costs are in 2009 dollars; comparative bid prices for closure items are adjusted for CIWMB inflation. <br />Area of GCL Barrier (SF): 8,461,500 <br />Area of Geocomposite Drainage Layer to provide drainage relief over 20 percent of the GCL Barrier Area (SF): 1,692,300 <br />Volume of 1 ft. Vegetative Soil (CY): 313,000 <br />The County will seek agency approval of the above GCL barrier and may evaluate and propose an evapotransporation soil final <br />cover, composed of an overall 5 -foot thickness of select on-site soils. <br />UNIT COSTS FOR FINAL COVER INSTALLATION <br />1.0 Unit cost includes disking vegetation, stripping 6 inches of the existing partial soil cover, stockpiling, and stripped soils for <br />use as the upper layer of vegetative cover and compacting the upper surface of existing partial cover for geosynthetic <br />materials. <br />Disking @ $ 500/AC <br />Stripping @ $1,614/AC 807 CY/AC @ $2.00/CY ($0.50 > UCB) <br />Compacting @ 1 211/AC 807 CY/AC @ $1.50/CY UCB earthfill <br />$3,325/AC Allow $3,500/AC for preparation <br />Moisture conditioning and compaction of $1.50/CY UCB soil excavation <br />subgrade" <br />Soil placement and compaction 1.50/CY UCB earthfill <br />$3.00/CY Allow $4.00/CY <br />The additional $1.00/CY for >300,000 CY provides $300,000 equipment mobilization, <br />subgrade compaction, any surveying, and miscellaneous activities <br />2.0 Used $0.60/SF unit cost, a slightly lower unit cost than UCB unit cost for GCL due to significantly higher closure quantities. <br />3.0 Used $0.60 UCB unit cost (closure quantity about 2 times UCB) <br />4.0 Allow $4.00/CY per Item 2.0 above. The additional $1.00/CY for 313,000 CY provides $313,000 for equipment <br />mobilization, surveying, and miscellaneous activities. <br />5.0 Used $3,500/AC; $1,000> than North County Module 4 hydroseeding cost. The additional $1,000/AC provides for erosion <br />control materials for bench V ditches. <br />LEACHATE CONTROL IMPROVEMENTS <br />7.0 It is anticipated that the leachate system will be installed as each module is constructed. This estimated cost is for <br />inspection and any repairs of the pumping and removal facilities, as needed. <br />Allow 20 technician hours, at $80/hr, and $900 for any parts and equipment. ($80 x 20 + $900) = $2,500 each. <br />PCMP for NCRCSL D-3 Department of Public Works/Solid Waste <br />O:ISan Joaquin CountylNCRCSL11180QPCPMPIFina1 ReporAPCPMP—Rev_Jan_2010.Doc County of San Joaquin— January 7, 2010 <br />