EE WAS IN THE PROCESS OF LOADING A FULL 55 GALLON WASTE OIL DRUM ONTO A SUPPLY TRAILER AT THE TIME OF THIS INCIDENT. WHEN HE LIFTED ONE END OF THE BARREL TO SET IT UPRIGHT IS WHEN HE STRAINED HIS SHOULDER. EE SOUGHT MEDICAL ATTENTION ON 07/16/02. EE CONTINUED TO WORK UNTIL HE HAD SURGERY ON 08/12/02 TO REPAIR A SMALL FULL THICKNESS TEAR OF A TENDON IN HIS SHOULDER AREA.