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Prince William Landfill Sequence 4 Cap Construction
Prince William Board of County Supervisors
Scope of Work
Site preparation, including stripping topsoil.
Installation of erosion and sediment controls, including sediment basins.
Installation of 1,500 linear feet of 4”/6”/8” HDPE LFG lateral pipe, 600 linear feet of 6” HDPE LFG header pipe (to replace existing pipe) and 4 LFG extraction wells.
Installation of 3,000 linear feet of stormwater diversion berms
Installation of 2,200 linear feet of 6” horizontal LFG collector pipe and wellheads, 1,900 linear feet of 6”/8” toe drain pipe, and 1,300 linear feet of 18”/30”/36” corrugated HDPE down drains.
Placement of 30,000 cubic yards of infiltration soil and 35,000 cubic yards of vegetative support soil from on-site borrow areas
Installation of the sediment basin, riser structure, and outlet piping.
Placement of 10,000 cubic yards of topsoil (Sargent had to amend the on-site soil with imported compost to make the topsoil).
Sargent crews also constructed an access bench/road across the cap area and did the final site stabilization.
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