ON 3/13/00 EE WAS HELPING TO UNLOAD BREAKERS FROM THE BACK OF A TRUCK. HE FELT A PAIN IN HIS LEFT FOOT. ON 3/15/00 HE WAS ASSISTING IN CALIBRATING THE WEIGH FEEDERS AT THE PLANT. HE STEPPED DO WN FROM ONE LEVEL TO ANOTHER AND FELT AN EVEN SHARPER PAIN IN THE SAME ATEA OF THE FOOT. ON 3/16/00 THE EE WENT TO THE DR WHEN THE PAIN PERSISTED & HE EXPERIENCED DISCOMFORT WHEN THE FOOT TUR