EE SLIPPED WHILE MAKING HIS INSPECTION WALK THROUGH, AND SPRAINED HIS LEFT KNEE. LATER, DURING HIS SHIFT, WHILE USING A HAND WRENCH TO REMOVE BOLTS, HIS KNEE WAS AGAIN STRAINED. THE KNEE REMAI NED PAINFUL. ON 6-29-00, EE REPORTED THE INCIDENT TO HIS IMMEDIATE SUPERVISOR, OTHER PRELIMARY DIAGNOSTICE FOUND A POSSIBLE TORN CARTILAGE BEHIND THE KNEECAP. HE HAS MISSED NO DAYS OF WORK.