The soil is clay/sand (51% sand and 49% clay). Blow counts at subgrade are 15 but 6'-0" down they are only 6. Only compaction at subgrade was called for in the report.
My thoughts were if the containment pit held the water, then there might be a chance of some localized seepage at the crack...
I have an issue with a mud mat that I can use some advice on. I have a large mass concrete slab (50'-0" x 50'-0" x 6'-0") on a project with heavy reinforcement and a very large embed frame. we placed a 6" mud mat about 5'-0" below grade and place some 6" concrete walls on top to form a...
