Demonstration and Validation of the Horizontal Reactive Media Treatment Well (HRX Well) for Managing Contaminant Plumes in Complex Geological Environment

2020 ESTCP Project of the Year Award for Environmental Restoration 

Remedial technologies that address long-term mass discharge reduction are preferred at most Department of Defense (DoD) sites, as contaminant mass flux and discharge are considered to be the most apt measure of plume strength and potential migration risk. 

Dr. Craig Divine from Arcadis and his team led an ESTCP-funded project that validated the horizontal reactive

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media treatment well (HRX Well®), an in situ remediation approach that demonstrated a per-well hydraulic treatment zone width of 50 ft and an average mass discharge reduction of about 1.8 grams per day of contaminants. The HRX technology captures and passively treats large volumes of groundwater in situ by using the “flow-focusing” behavior created by the strong well-to-aquifer permeability contrast.  

The HRX Well® significantly reduces life-cycle costs compared to current alternative technologies, as it requires little long-term maintenance while controlling contaminant migration and mass discharge. This approach efficiently treats down-gradient plumes over shorter periods of time with the reduction of source zone discharge. Dr. Divine and his team demonstrated that the HRX Well technology can treat a range of contaminants across complex geological settings and can be installed under active infrastructure.

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For these significant contributions, Dr. Divine and his team received the 2020 ESTCP Project of the Year Award for Environmental Restoration for their project titled  Demonstration and Validation of the Horizontal Reactive Media Treatment Well (HRX Well) for Managing Contaminant Plumes in Complex Geological Environment.

Project Team:

  • Craig Divine ​– Arcadis
    ER ESTCP POY 2020 Team
  • Michelle Crimi – Clarkson University
  • John Frederick Devlin – University of Kansas
  • Jesse Wright – Arcadis 
  • Jeffrey McDonough – Arcadis 

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