THE INJURED WORKER SOUGHT MEDICAL TREATMENT ON 12-19-00 FOR PAIN AND NUMBNESS HE WAS EXPERIENCING IN BOTH HANDS ON OCCASION. HE HAS BEEN USING AIR LANCES AND JACKHAMMERS TO REMOVE MATERIAL BUILDUP FROM THE PREHEAT TOWER CHUTES AND DUCTS AS A PART OF HIS REGULAR JOB DUTIES AS A PREHEAT TOWER LABORER TRAINEE.