WALKING ALONG CRUSTED SLURRY TOWARDS A PLUGGED SUMP, EE'S FEET BROKE THROUGH THE CRUST AND SANK INTO THE WET SLURRY. HE REMOVED HIS BOOTS, RINSED HIS FEET AND SOCKS, PUT HIS BOOTS BACK ON AND CONTINUED TO WORK. HE LATER RINSED HIS BOOTS AGAIN, AND HIS FEET STARTED TO BURN. HOSPITAL DIAG.: 2ND DEG BURNS TO BOTH FEET. RESTR. DUTY 1 WEEK, THEN PUT OFF WORK AS OF 6/4/04.