Innovations in Electrode Design

TRS offers the most diverse and flexible electrode designs to meet geologic conditions, on-site structures, and below grade obstacles (utilities).

Bored electrodes with co-located vapor recovery (VR) wells are the standard for TRS ERH applications. TRS has advanced the design to an adaptive electrode design.

Advantages of the TRS bored electrode design:

  • Multi-element electrodes allow independent control of energy into discrete subsurface intervals.
  • Patented backfill reduces the local resistance in the formation.
  • Electrode boreholes are made with standard drilling techniques including hollow stem auger.
  • Electrode components are assembled in the field allowing modifications based on changed site conditions.
  • Overlapping vacuum influence captures steam and vapors and eliminates the vapor intrusion pathway.
  • Electrode installation in the saturated zone requires no water addition. Therefore little or no wastewater is generated for treatment and/or disposal.

Angled electrodes that are co-located with VR wells up to 45 degrees have been installed at site locations to work around utilities or other below grade obstacles. In addition, angled electrodes next to and under occupied buildings and active roadways allow heating to reach contaminants and avoid facility disruptions. Angled electrodes also work well for those structures unable to provide access to standard drill rigs.

Advantages of TRS angled borings:

  • TRS electrodes have the flexibility to be installed at angles up to 45 degrees.
  • TRS electrodes can be installed under active roadways, public access areas, and beneath operating facilities with no disruption.
  • Overlapping vacuum influence captures steam and vapors and eliminates the vapor intrusion pathway.

Horizontal electrodes co-located with VR wells allows complete access to apply ERH beneath structures and occupied facilities without disruption.

Advantages of TRS horizontal electrodes:

    Ability to access subsurface areas under buildings and structures that are otherwise not accessible from inside the structure or building. Minimal to no disruption to operating facilities, active roadways, or other public access areas. Overlapping vacuum influence captures steam and vapors and eliminates the vapor intrusion pathway.

Sheet Pile electrodes can be used in soil that is amenable to vibrating a sheet pile with groundwater depths of five feet (or less) below ground surface. TRS is also able to use existing sheet pile walls as a single-phase electrode on sites for further cost savings.

Advantages of TRS sheet pile electrodes include:

  • Sheet pile electrodes can be coupled with an existing sheet pile wall providing additional remediation.
  • Robust vapor recovery (VR) from vertical, independent VR wells and/or horizontal VR wells on top of the sheet pile electrode.
  • More energy efficient.
  • Installation can be two-three times faster than standard drilling.
  • No exposure to groundwater or vapors during sheet pile installation.
  • Cost savings through the elimination of drill cuttings, which require disposal.
  • Sheet pile can be removed/recycled following ERH remediation.

Angled Electrodes

Horizontal Electrodes

Sheet Pile Electrodes