EMPLOYEE WAS WELDING INSIDE CHUTE AT WASH PLANT WHEN A PIECE OF SLAG & WELD FELL ON HIS KNEE AND BURNT THROUGH HIS PANTS AND ROLLED INTO HIS BOOT. BURNT INTO TOP OF FOOT BEFORE HE COULD GET BO OT OFF. THIS HAPPENED ON FRIDAY. HE DID NOT GO TO DOCTOR UNTIL SUNDAY WHEN FOOT GOT INFECTED.