31.50.00 Excavation Support and Protection
31.56.00 Slurry Walls
31.56.13 Bentonite Slurry Walls 31.56.13.13 Soil-Bentonite Slurry Walls 31.56.13.16 Cement-Bentonite Slurry Walls 31.56.13.19 Slag-Cement-Bentonite Slurry Walls 31.56.13.23 Soil-Cement-Bentonite Slurry Walls 31.56.13.26 Pozzolan-Bentonite Slurry Walls 31.56.13.29 Organically-Modified Bentonite Slurry Walls 31.56.16 Attipulgite Slurry Walls 31.56.16.13 Soil-Attipulgite Slurry Walls 31.56.19 Slurry-Geomembrane Composite Slurry Walls 31.56.23 Lean Concrete Slurry Walls 31.56.26 Bio-Polymer Trench Drain