EE SUFFERED SPOT SECOND DEGREE BURNS TO HIS LOWER LEGS. HE WAS PREPARING TO MOVE A 24"" PIPE SLIP ON A FLANGE BY ROLLING IT TO THE FAB TABLE. THE FLANGE SLIPPED OUT OF HIS HAND WHILE WORKING IN THE RAIN AND SPLASHED IN A PUDDLE THAT HE THOUGHT WAS WATER. THE PUDDLE MUST HAVE HAD CAUSTIC DILUTED BY RAINWATER.