5-8-17 EE was walking across top of #2 washer tank, surface deflected. EE stated felt a pain in left knee. Sent to medical, ice applied to knee and OTC anti-inflammatory taken. EE working no restrictions. EE sent for follow ups including x-rays, CT and MRI on 6-16-17 found potential left knee ligament tear. Restricted duty Follow up with Orthopedic.