Case Study 1

Manhole Rehabilitation
El Paso, Texas

4'0 manhole prior to rehabilitation.	Manholes are first hydroblasted to remove loose material, then sandblast with copper slag, finally hydroblasted again to remove loose material.
Manhole after surface preparation.	Application of C-120 calcium aluminate cement based concrete to kill bacteria and rebuild walls and bench to original dimensions.
Sewer Shield® 100 epoxy coating is then troweled on to a minimum of 1/8" thick to seal the C-120. The Sewer Shield® 100 can withstand exposure to sulfuric acid from 1% to 98% concentrations.	Once the Sewer Shield® 100 has cured (about 4 hours) the liner is spark tested at 15KV over the entire surface to make sure that there are no voids in the coating.

The Sewer Shield® rehabilitation includes a written 5 year warranty against defects in materials and workmanship. Over the past 20 years over 10,000 manholes have been lined with no failures. References available upon request.