- Model ERH - Electrical Resistance Heating

TRS is the leader in the in situ thermal remediation marketplace. Property owners nationwide select the TRS ERH process for quick and reliable results.

Electrical Resistance Heating (ERH) is an in situ, thermal technology that uses commonly available electricity and applies it into the ground through electrodes. These electrodes can be installed either vertically to any depth or horizontally underneath buildings, operating facilities, and in the presence of buried utilities. The technology is equally effective in soil and groundwater.

The technology was first commercially deployed in 1997 by many of the current TRS employees and can be deployed in a variety of applications. These include: underneath buildings, in active facilities and with public access, for chlorinated volatile organic compounds at concentrations indicative of DNAPLs and fuel hydrocarbons as LNAPL, in most types of lithologies (including bedrock), and varying contamination depths (now up to 135-ft bgs). TRS has 100% client satisfaction on all projects and a dozen of the commercial sites have received closure.

  • TRS staff completed and/or currently operating on over 130 sites to date
  • 78% of all clients return to TRS for additional projects
  • Consistently uses 95% of estimated design energy to reach, or surpass contracted remediation goals
  • stablished joint ventures in South America and the European Union
  • Developing new partnerships in the heat enhanced oil recovery market

  • Standard drilling techniques are used to install co-located recovery wells and electrodes.
  • Electricity is connected from a utility power source to the power control unit.
  • Electricity is applied to the electrodes and current flows between them within the treatment volume.
  • Soil is naturally resistant to the flow of electrical current, heating the soil and groundwater.
  • Heat causes the underground contaminants and water to evaporate, creating in situ steam and vapor.
  • Vapors, steam and NAPL are recovered to the surface under vacuum.
  • The multiple phases are treated at the surface using standard treatment techniques.
  • Heat-enhanced in situ destruction provides polishing mechanisms long after ERH is complete resulting in no rebound.


Important TRS ERH Remediation Facts

  • Safe, effective, and proven technology in all lithologies and most contaminants
  • Economical when compared to life cycle costs of alternative technologies
  • Outstanding safety record in over 750,000 employee hours – EMR is less than one
  • Provides Guaranteed Fixed Price Remediation (GFPR) and Money Back Guarantees
  • Operations conducted beneath buildings, in active facilities, and public right-of-ways
  • Achieved >99.9999% reductions in soil and MCLs in groundwater
  • Provides certainty that sites are clean once and for all

ERH cleanup typically requires only six to nine months as opposed to conventional treatment methods which often take many years, making the ERH process a sperior alternative when evaluating the complete life cycle of a remediation project.

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