THE EE WAS REMOVING A BIT FROM THE DRILL STEEL BY HITTING IT WITH A HAMMER. A SMALL PIECE BROKE OFF AND HIT HIM IN THE LEFT BICEPS, GOING THROUGH HIS SKIN INTO THE MUSCLE. THE EE CONTINUED TO WORK AND WENT TO THE DOCTOR ON 7/16/04 AT WHICH TIME A SMALL PIECE OF METAL WAS REMOVED FROM HIS ARM. THE EE RESUMED NORMAL DUTIES 7/17/04. REPORTABLE INJURY.