Remediation of Contamination

From simple excavation solutions to very complex in-situ remediation technologies

Contamination of the soil has just taken place – or has just been discovered. What kind of solutions do we have? In many cases the fastest and cheapest solution would be to excavate the contaminated soil, if possible. However, sometimes the contamination can be inaccessible for instance if it has migrated deep into the ground, or if it is impossible to excavate the contaminated soil for building technical reasons. In this case a remediation using in-situ technologies could be the solution.

DGE offers a wide range of known in-situ remediation technologies:

  • Physical methods
  • Vacuum extraction
  • Multi-phase extraction
  • Air-sparging
  • Recirculation wells
  • Pump and treat
  • Heating

Chemical methods, the use of:

  • Potassium permanganate
  • Ozone
  • Biological methods
  • BiOxy Tracking
  • Biogel
  • Stimulating reductive dechlorination
  • Augmentation
  • Bio venting

In some cases we have developed entirely new methods or used well-known methods in new ways. The in-situ technologies will often be supplemented with an on-site treatment of contaminated groundwater and soil gas using biological methods, if possible combined with treatment with activated carbon.

The final choice of solution is made after thorough investigations and consideration of the optimal technology for the specific project. The choice is made i.a. based on knowledge of the concentration levels of the contaminants and their behaviour in soil, groundwater and soil gas as well as the geology and hydrogeology of the site in consideration of the desired time frame, risk object, economic conditions and environmental profits. In many cases the optimal solution is a combination of different remedial methods to ensure the continued land use of the area and contribute to an environmental and economic profit for society and the customer.