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  • Soil remediation, one discipline within the broader scope of environmental remediation, is the process of decontaminating soil. RECON is an industry leader in soil and sludge stabilization and solidification.
  • A secant wall is used in deep foundations in situations where the surface soil layers are unstable.
  • Among the processes used in soil remediation, excavation and dredging are among the most common. The process involves extracting unrecoverable contaminated soil.
  • Secant pile walls are one of the most economical methods of creating effective water control barriers for building structural walls, top-down tunnels and dams.
  • Deep Soil Mixing is a in-situ soil improvement technology used to construct cutoff or retaining walls and to treat contaminated soils.
  • This sludge pond is a good candidate for bio remediation or stabilization.
  • RECON's excavator is capable of digging a slurry wall up to 100 ft deep. Slurry walls have been used for decades to provide cost-effective, long-term solutions for many groundwater control problems.
  • Soil remediation project using remote placement conveyor.
  • Driving concrete pile to strengthen and support structural foundations.
  • Slurry wall construction is used to create non-structural barriers (Cutoff Walls, Slurry Trenches), which are constructed underground to impede groundwater flow.

Groundwater Control/Treatment

 

RECON is an internationally recognized slurry trench contractor, having installed over 11,000,000 square feet of slurry trench. Company-owned and customized equipment gives us the capability of excavating 100-feet deep trenches with hydraulic excavators, and over 100-feet with hydraulic clams. Specialized equipment including long-reach excavators, custom buckets, desanders, clam buckets, cranes, and high-speed colloidal mixers. The specialized nature of this work allows us to be competitive even on relatively small projects.

 

The correct equipment is essential to a successful project, but not as important as seasoned operators and project superintendents. RECON employees are among some of the sharpest, hardest-working, and most experienced field personnel in the industry. Operators and project superintendents have an average of 20 years of hands-on experience and are the key to our success with these technologies.

 

Groundwater Cut-off Walls – RECON has installed over 200 subsurface barriers using the slurry trench method. These cut-off walls have consisted of soil-bentonite, soil-cement-bentonite, cement-bentonite, soil-attapulgite, Impermix™, as well as other impermeable materials.

 

Biopolymer Trenches, Permeable Reactive Barriers, and Iron Filing Walls – RECON has installed over 25 treatment systems using the biopolymer trench method. Trenches have been installed for groundwater intercept, landfill gas intercept, and passive treatment of groundwater.

Reactive Barrier Wall

 

RECON was awarded a contract to install 7 biotrenches, totaling 2,555 linear feet at the former Naval Weapons Industrial Reserve Plant in McGregor Texas. A biotrench consists of a zone of reactive organic material, installed in the path of a groundwater plume. As biodegradation occurs in the trench, contaminates are reduced to non-hazardous compounds.

 

groundwater control

 

Project Features

 

• Excavating the 2.5-foot trenches to depths ranging between 10 and 19 feet

 

• Backfilling the trenches with 60% drain rock, 20% mushroom compost, 20% woodchips, and soybean oil

 

• Covering the trench with geotextile, a clay cap, and topsoil.