Specification for the Construction of Slurry Trench Cut-off Walls as Barriers to Pollution Migration

This specification, and the appended notes for guidance, has been compiled to be used where slurry trench cut-off walls are required to act as barriers to pollution migration. It provides a standard and consistent approach to the design, construction, testing and monitoring of cut-off walls, guidance on the appropriateness of this technique and current best practice.