Emp.stepped into pump pad flooded with caustic which filled his boots. Went unreported for 2.5 hours. Once notified, supervisor contacted med dept,RN assessed and determined first aid case. Rechecked on 12/1/13, employee off 12/2 & 12/3, rechecked on 12/4 with no signs of infection. Evaluated by Dr. on 12/9/13, & med prescribed for cellulites, resulting in recordable.