EMPLOYEE STATED AFTER WORKING ON THE LONG WALL FACE LINE FOR A SECOND DAY, (WEARING RUBBER STEEL TOE BOOTS) EXPERIENCED BLISTERS ON BOTH FEET AND SORENESS TO HER LOWER BACK. THERE WAS NOT A SP ECIFIC INCIDENCE, THE CONDITIONS CAME OVER A TWO DAY PERIOD, DUE TO THIS, THE INCIDENT WILL BE CONSIDERED A WORK RELATED ILLNESS, NOT AN INJURY.