THE EE WAS CHECKING PROPANE LEVELS IN THE STORAGE TANKS FOR THE END OF SHIFT REPORT. HE STEPPED OVER A PIPE & TRIPPED, LOST HIS BALANCE, FELL & TWISTED HIS LEFT ANKLE. THE ANKLE SWELLED, & THE EE WENT TO THE ER FOR EVALUATION & TREATMENT. HIS ANKLE WAS X-RAYED, & A FRACTURE WAS FOUND. HE WAS PLACED IN A WALKING BOOT & RELEASED TO LIGHT DUTY.