EE WAS ASSISTING CO-WORKERS WHO WERE SETTING SLIDE GATES IN TROUGHS TO ISOLATE 150 PRIMARY FOR CLEANING. WHILE EE WAS RETRIEVING STORED SLIDE, HE STEPPED DOWN AND DUCKED UNDER A CIRCULATING LINE, PLACING HIS LEFT FOOT ON THE LIP OF THE TROUGH. HIS FOOT SLIPPED INTO THE TROUGH, WHICH HAD LIQUOR IN IT. HE SUSTAINED FIRST AND SECOND DEGREE BURNS. RESTRICTIONS WERE ISSUSD.