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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.

Soil, Sediment, and Sludge Remediation

 

RECON is an industry leader in soil and sludge stabilization and solidification, having treated over 6 million cubic yards of material. Our employees have hands-on experience with dozens of different reagents, including our patented reagent blend (Muck Mix®). RECON has entered into long-term contracts with major reagent and transportation vendors to ensure competitive rates and a steady supply of product. Reagents can be delivered to jobsite by truck, rail, or barge and offloaded with the most efficient material handling equipment commercially available.

 

Reagent selection and mechanical mixing equipment is based on function such as increasing compressive strength, immobilizing or oxidizing contaminants, and volume reduction. Our experience includes both in-situ and ex-situ methods with varying levels of PPE and many different contaminants.

 

RECON has the capability to perform bioremediation, hot air/steam stripping, iron injection, and in-situ solidification/stabilization of almost any contaminant.

 

RECON owns and operates the following types of mechanical mixing equipment.

 

  • Single Auger Mixer (0 to 60 feet deep)
  • Blending Rakes (6 to 15 feet lengths)
  • Pugmills (up to 75 tons/hour)
  • All Mixers (excavator mounted mixing heads)
  • Dual Auger Mixer® (0 to 35 feet deep)
  • Bucket Mixing (50 excavators)

Sludge Stabilization

 

Closure of four surface impoundment ponds at a Delaware facility involved the neutralization and stabilization of 70,000 cubic yards of ferric chloride sludge. The pH of the waste material was less than 2 SU and in one pond, less than 0.5 SU.t.

 

sludge stabilization

 

Project Features

 

• Using a reagent composed of 20% hydrated lime, 10% Portland cement, and 10% water

 

• Discharging the dry agent compounds into dust suppressant devices pneumatically and mixing the reagents and sludge with a trackhoe

 

• Sampling the treated material using TCLP and SPLP

 

• Installing a gravity drain system to allow rainwater from three ponds to collect into the fourth pond in preparation for channeling to the facility's water treatment unit