- Ground water cut-off walls refer to a wide variety of techniques to construct low hydraulic conductivity subsurface barriers or deviations
- Cut-off walls can be installed to contain, capture or redirect groundwater flow in the vicinity of the site for the control of contaminant migration
- Typical cut-off walls employ a slurry wall construction methodology with soil bentonite backfill. Less common slurry wall backfills include cement bentonite (CB), soil attapulgite (SA) and concrete (plastic or diaphragm). Ground water cut-off walls may also be constructed using various grouts or soil mixing technology. While grouting may be used to create horizontal barriers to seal the base of contaminent site, soil mixing technologies such as Geomix offer high quality mixed in-situ walls.