The first trusses and roof beams for the E-buildings (E01, E05) were put in place, atop the more than 30 steel pillars already installed to support the buildings. The concrete vault was cast for the Sprinkler Building (H10), enclosing this novel structure that will serve as a giant water tank. In the Gallery Building (G02) test stand area, ESS is currently installing a system to deionize water to be used for cooling the klystrons. Across the way in the Cryo-Compressor Building (G04) the three large compressors were grouted to the concrete floor to fix them in place and aid in controlling vibration. Another two large outdoor Helium tanks are scheduled for delivery this week. And in the Target area (D02), there were further castings for the Monolith walls.