THE INJURED EMPLOYEE WAS EXITING THE CONTROL ROOM. AS HE WAS LEAVING THE STATION HE STEPPED ON APIECE OF TRASH THAT WAS ON THE FLOOR, CAUSING HIM TO STUMBLE AS HE WENT OUT THE DOOR. THERE IS APPROXM A 10 INCH DROP FROM THE CONTROL ROOM FLOOR TO THE WORK AREA FLOOR, AND AS HE MADE THE STEP HE LANDED ON HIS LEFT ANKLE, RESULTING IN A MILD SPRAIN.