THE EE S FORE MAN WAS ATTEMPTING TO CLEAN OUT A VENT ON #3 RAYMOND MILL FROM THE BOTTOM SIDE OF THE MILL. THE MATERIAL IN THE LINE RELEASED ALL AT ONCE, BLOWING OUT THE TOP OF THE VENT AND INT O THE EE S FACE HE WAS STANDING ON THE TOP SIDE WORKING ON A MILL BEARING EE USED THE EYE WASH STATION TO REMOVE DEBRIS, BUT ALSO NEEDED TO SEE THE DR TO HAVING REMAINING DEBRIS FLUSHED OUT.