EE attempted to close pump 5 valve when EE felt a 'pop' in chest. EE called for assistance-reporting discomfort in chest-EMS transported to ER for exam.-Was released w/instructed to see PC Provider. 8/16/22 CNP examined released w/10lb lifting restrictions re: strained/pulled pectoral muscle - follow-up Appt. 10 days. No lost workdays to date.