This is one of 6 basins where we are rehabilitating the floor to each of these large vaults in the ground. Each basin is approximately 6300 sq.ft. in size.  

Working underground, we are removing 2 inches of the old failing grout, and replacing it with an ultra strong polymer concrete that is extremely durable (i.e. 18,000 psi compressive strength) but also chemically resistant throughout its entire thickness.