on April 29, 2021 Three days after student-athletes defaced Building 10 with sprayable chalk, the University announced that cleaning the building has “posed a significant restoration challenge.” According to Stanford, more than 80 hours of labor from maintenance workers will be needed to complete restoration efforts, and workers have already completed half of those hours. “The burden of their decision to spray chalk the buildings is falling on workers,” it wrote in an update on Thursday. The defacing came after a rally organized by 36 Sports Strong, a group of alumni aiming to reinstate 11 varsity sports that will be discontinued after the academic year. While some students returned to Main Quad to clean up the chalk, the University wrote in a statement that the messages “did not simply disappear when washed; the interaction of chalk and historic sandstone has posed a significant restoration challenge.”