A permeable reactive barrier (PRB) is a technology designed for passive in situ treatment of contaminated groundwater. Also known as permeable reactive treatment zones (PRTZ), these barriers are used to intersect with the contaminant plume. When necessary, an impermeable wall is installed to direct the flow of groundwater through the PRB. The barriers are comprised of reactive materials that target dissolved phase contaminants as the plume flows through the barrier.
Cascade provides PRBs utilizing either liquid or solid slurry amendments.
When liquid amendments are selected for a project, they are injected into the subsurface using injection wells or direct push technology (DPT).
When solid amendments are chosen, we create the PRB using pneumatic or hydraulic fracturing, which creates a matrix by which the amendment slurry can contact the areas of contamination.