Slurry Wall Construction Services
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Our slurry cutoff wall construction services include:
A variety of slurry applications
In-situ vertical auger soil-mixed walls
Biodegradable biopolymer slurry trenches
Site dewatering using well point system
Funnel and Gate and Permeable Reactive Barriers (PRBs) groundwater treatment systems
Slurry Cutoff Wall Construction Challenges. ENTACT Solutions.
Former Wood Treating Site
Approximately 2,200 feet long and up to 45 feet deep
ENTACT implemented corrective measures at a 52-acre former wood treating facility that produced creosote-treated railroad crossties. After demolishing the on-site buildings, we installed a 2,200 linear foot soil-bentonite slurry wall to a depth of 45 feet below ground. This wall contained the source area and controlled groundwater migration from it. We also excavated and consolidated 17,000 cubic yards of PAH- and phenol-impacted surface soils, subsurface soils, and sediments and dewatered and backfilled a former water supply pond located in the containment area.
Superfund Site Slurry Wall Construction
ENTACT completed slurry wall and cap construction at this Superfund site, constructing three soil-bentonite slurry cutoff walls around the perimeter of three perched water management areas. Installed at the FSD, FCD and DDA/LSD areas of the site, the combined walls were approximately 6,074 feet long, 3 feet wide and 17 to 45 feet in depth, meeting a permeability not greater than 1 x 10-6 cm/s. Our activities also included the construction of a cap consisting of GCL or geomembrane, a drainage layer, geotextile and topsoil spanning more than 30 acres.
Slurry Wall Construction
This client first hired ENTACT to construct a more than 9,000-foot long, 65-foot-deep soil-bentonite slurry wall keyed a minimum of 4 to 5 feet into the underlying competent bedrock. After the successful completion of the project, ENTACT was awarded additional work, including the construction of a 7,438-foot-long soil-bentonite slurry wall with an average depth of 29.4 feet and a total facial area of 218,677 square feet. The cutoff walls were required to minimize dewatering efforts and facilitate dry mining operations, while ultimately allowing mined pits to serve as a surface water storage reservoir upon decommissioning.