EE WAS GREASING AND CHECKING PUMPS, HE STEPPED ITNOT HE BASEMENT THROUGH FOR THE CLEANING PUMP AND TWISTED HIS BACK A PIECE OF FLOOR GRATING WAS OUT OF PLACE AND WAS INT HE PROCESS OF BEING RE PLACED WITH NEW PUNCH PLATE. EE DIDN'T RETURN TO WORK ON 8-4-00 BECAUSE OF MEDICATION PRESCRIPBED TO HIM.