EMPLOYEE WAS STANDING ON A PALLET AT GROUND LEVEL PUMPING FUEL INTO A 60 TON CRANE. THE TANK FROM UNDER WHICH THE FUEL WAS BEING PUMPED WAS ON THE SAME PALLET. HIS FOOT SLIPPED CAUSING HIM TO FALL, STRIKING HIS LEFT HIP ON THE EDGE OF THE PALLET. DID NOT SEEK MEDICAL TREATMENT UNTIL 5-3-00.