IE was turning a splash guard on the 6th floor of the Concord prep Plant. As EE was pushing the splash guard EE felt a pain in EE's left shoulder. IE missed no work until 8/16/19. After IE visited the Dr on 8/16/19 for EE's shoulder pain, the Dr took EE off of work but found no damage in EE's shoulder. Possibly a strained muscle that needed to heal.