In the C4 Level Broadcast Tank Room, the south facing concrete foundation wall was showing signs of active below grade water infiltration and signs of previous water staining and efflorescence. There were foundation wall vertical cracks that started at the floor slab and continued upward on the wall. There also existed several locations of pin holes that are approximately 3/4 inch in diameter that are actively leaking. As a result, there was ponding of water on the floor slab on grade. The elevation of these cracks and pin holes was well within the groundwater table under tremendous hydrostatic pressure, as this C4 Level was at least 50 ft. below grade. The concrete foundation wall was obviously very thick, as this structural wall was supporting the massive Freedom Tower above.

It was very critical that these actively leaking locations were rectified so that the specialized epoxy floor slab coating could be properly applied by the GC Contractor and adhered on to a dry surface. These water entry points were successfully implemented with the CGI waterproofing system. The CGI specialized pumps could create the necessary pressure output exceeding 3,000 psi for the two component resulting gel to penetrate full depth toward the exterior side. Thus the CGI gel was able to reach deep within the cracks and the pin holes for a complete waterproofing seal. Consequently, the GC was able to perform the application of the specialized epoxy coating effectively.