Emily Crownover, Managing Principal Engineer, leads a tour at Eielson Air Force Base in Fairbanks, Alaska, where TRS is using its thermal conduction heating technology on PFAS containing ex situ soil stockpiles (pictured in the background).
Emily Crownover, Managing Principal Engineer, leads a tour at Eielson Air Force Base in Fairbanks, Alaska, where TRS is using its thermal conduction heating technology on PFAS containing ex situ soil stockpiles (pictured in the background).

TRS applies our patent-pending FlexHeater thermal conduction heating (TCH) technology in situ or ex situ for the treatment of volatile and semi-volatile organic compounds (VOCs and SVOCs, respectively). TCH involves placing narrow diameter steel pipes in soil and heating them to hundreds of degrees Celsius. The heat propagates radially away from the pipes, evaporating the contaminants. 

Using our flexible heaters, we can achieve temperatures of about 400°C in the vadose (unsaturated) zone or ex situ soil piles. These temperatures are high enough to volatilize many SVOCs, including PCBs, PAHs and PFAS. Our FlexHeater® services are effective in all types of soil and bedrock, often achieving 99% or more contaminant concentration reductions.

The safety of our employee-owners and all who contact a TRS site is our primary focus. Through Intertek, an OSHA-approved testing laboratory, our flexible heaters obtained the ETL Mark, a symbol verifying the highest electrical safety within our industry.  

TRS employee owners insert a FlexHeater element into a borehole.

Advantages of the FlexHeater Technology

  • Outstanding performance in difficult matrices, such as crystalline bedrock and saline environments

  • Design allows for targeted power delivery

  • Easy to install

  • Small diameter bore holes save money and allow installation at sites with difficult access

  • Easy to remove, adjust and reinsert flexible heaters

  • Can be far less expensive than dig and haul
TRS project team members oversee angled thermal conduction heating installation at a TCH site.
TRS project team members oversee an angled thermal conduction heating installation.
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