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Environmental and Geotechnical Construction Services
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Services

Soil Mixing Services

ENTACT has been an industry leader in soil mixing solutions for 27 years, treating and/or improving the strength properties of millions of tons of clean as well as impacted material utilizing various soil mixing techniques. To support our soil mixing efforts, ENTACT operates an in-house bench scale laboratory capable of performing treatability/geotechnical studies for impacted and non-impacted media. This valuable resource enables us to control costs and more importantly, control the quality of the study. In addition, we have many proprietary reagents for various treatment scenarios, possess our own specialized soil mixing equipment, and employ some of the most experienced professionals in the industry.

ENTACT specializes in the following in-situ and ex-situ soil mixing services:

  • In-Situ Solidification/Stabilization
  • Chemical Fixation
  • Chemical Oxidation
  • Chemical Reduction
  • Bioremediation
  • Wet Soil Conditioning
  • Permeable Reactive Barriers

In-Situ Solidification/Stabilization
ENTACT has successfully performed in-situ solidification/stabilization (ISS) of millions of tons of impacted soils, sludges, and sediments in an effort to control valence states, buffer pH, increase bearing capacities, reduce leachability, reduce permeability, prevent durability impacts, and remove visible sheens. We utilize company owned and rented ISS equipment such as conventional and long reach excavators, specialized buckets, and horizontal and vertical augers. Additionally, we have designed, fabricated and built specialty configurations to amend equipment as needed for project specific needs.

Chemical Fixation
ENTACT utilizes chemical fixation technology to immobilize or stabilize contaminants in order to render material non-hazardous. Similar to solidification/stabilization, chemical fixation requires the blending of reagents with the contaminated material. The reagents used during the mixing and blending process is selected based on the nature of the material and the contaminants.

Chemical Oxidation
Chemical oxidation is another cost-effective and viable remediation technology to treat contaminants in soils, sediments, and groundwater by transforming the contaminants into less toxic by-products. Once a representative sample has been analyzed and the chemicals of concern are identified, bench scale testing is performed by ENTACT specialists in order to determine the type and quantity of reagent to utilize.

Chemical Reduction
Chemical reduction is another cost-effective and viable remediation technology to treat contaminants in soils, sediments, and groundwater by reducing the contaminant concentration, generally over a longer period of time with reagent like zero valent iron. Once a representative sample has been analyzed and the chemicals of concern are identified, bench scale testing is performed by ENTACT specialists in order to determine the type and quantity of reagent to utilize.

Bioremediation
Bioremediation technologies utilize naturally occurring microorganisms, such as bacteria, fungi, and yeast, to degrade hazardous substances into non-toxic or less toxic substances. The bioremediation technology most suitable for a specific site is determined by several factors, such as site conditions, indigenous microorganism population, and the type, quantity, and toxicity of contaminant chemicals present. Some treatment technologies involve the addition of nutrients to stimulate or accelerate the activity of indigenous microbes. ENTACT’s extensive environmental remediation experience has resulted in the ability to optimize environmental conditions in order to enhance the growth of microorganisms and increase microbial population resulting in improved degradation of hazardous substances.

Wet Soil Conditioning
Wet soil conditioning technologies have been implemented for contaminated soil, sludge, and sediment treatment in an effort to increase bearing capacity and enhance durability while reducing the leachability and/or permeability of the treated material. ENTACT’s bench scale treatability/geotechnical laboratory is capable of tackling any type of study for impacted and non-impacted media, regardless of waste stream. This resource enables to control costs and more importantly, control the quality of the study

Permeable Reactive Barriers
A permeable reactive barrier is a zone of reactive material that extends below the water table to intercept and treat contaminated groundwater. ENTACT has the in-house expertise to evaluate the geochemical, hydrogeological, and microbiological factors that govern the performance and functioning of these barriers. Understanding these factors is necessary in order to predict the longevity of our solutions, conduct economic analysis, and optimize this groundwater cleanup technology for a wide variety of hazardous compounds.

All Services

Environmental Remediation

Environmental Remediation

  • Excavation
  • Stormwater Management & Erosion and Sediment Controls
  • Earth Retention
  • Dewatering Systems and Water Treatment
  • Demolition
  • Cap & Containment
  • Sediment Removal & Wetland Restoration
Geotechnical Construction Services

Geotechnical Construction Services

  • In-situ Solidification/Stabilization
  • Chemical Fixation
  • Chemical Oxidation
  • Chemical Reduction
  • Bioremediation
  • Wet Soil Conditioning
  • Permeable Reactive Barriers
Soil Mixing

Soil Mixing

  • In-situ Solidification/Stabilization
  • Chemical Fixation
  • Chemical Oxidation
  • Chemical Reduction
  • Bioremediation
  • Wet Soil Conditioning
  • Permeable Reactive Barriers
Soil Mixing

Soil Mixing

  • In–Situ & Ex–Situ Treatment
  • Solidification/Stabilization
  • Chemical Fixation
  • Chemical Oxidation
  • Bioremediation
  • Wet Soil Conditioning
  • Permeable Reactive Barriers
LNG

LNG

  • Deep Soil Auger Mixing
  • Shallow Excavator Mixing – Mass Solidification
  • Wet & Dry Soil Mixing
  • Soilcrete Columns
  • Soil-Cement Columns for Tank Pad Support
  • Overlapping Columns
  • In-Situ Gravity Retaining Walls