Sanitary Sewer Rehabilitation by Southern Trenchless Solutions LLC. Our unique spray applied custom shotcrete system creates amonolithic/ jointless casting of the existing structure. This process not only restores but enhances the structural integrity, seals out leaks, and can outperform the original structures service life by as much asdouble. The Manhole Mortar product designed for this application reaches compressive strengths of 9,000psi-12,000psi which is 300%stronger than required by TCEQ (Texas Commission of Environmental Quality) and Dot (Department of Transportation). Aside from its ultra high strength the Manhole Mortar possess sulfate resistance from harsh gases such as H2S (Hydrogen Sulfide) which is the leading cause of early deterioration and failure in these underground sanitary sewer structures today.