TCH for Remediation of Bedrock - State of the Art

The basics for utilizing TCH to treat fractured bedrock and dual porosity systems will be presented, backed up by real-life examples from completed sites. The focus of the presentation will be on describing the heating approach as well as factors determining the efficiency of the thermal remedy. Also, well installation strategies and how to properly utilize information gained in the installation process to optimize the thermal remedy will be presented, along with examples from sites where heating was impacted by location hydrogeology and fracture systems. Documenting and verifying remedial performance at bedrock sites can be challenging.  Approaches utilizing both vapor concentrations, groundwater concentrations, and rock concentrations or combinations thereof will be discussed along with monitoring data showing continued decreasing concentration trends several years after the thermal remedy was completed.