RSS fire damage and remediation The RSS wall was nearly completed in the summer of 2015 with the void still open when, on a Friday morning in midJuly, welding sparks from overhead roof construction ignited the polystyrene insulation board installed on the outside of the CMU foundation wall. The CMU wall is located 3 feet (0.9 m) away from the RSS wall face at the bottom of the wall. The resulting fire sent a black cloud of smoke high into the sky. The fire was quickly extinguished with the assistance of an on-site water truck being used for dust control, with final fire resolution by the Minneapolis Fire Department. An approximately 30-foot (9.1-m) wide portion of the RSS wall appeared to be FIGURE 6 Completed RSS stress relief wall www.GeosyntheticsMagazine.com 27http://www.typargeosynthetics.com http://www.GeosyntheticsMagazine.com