EE WAS WALKING IN THE SLURRY AREA. HE STEPPED DOWN INTO THE AREA BY THE NORTH SUMP. HIS FOOT SLIPPED & HIS LEG LOCKED UP CAUSING A SHARP PAIN IN HIS RIGHT KNEE. HE WENT TO EMERGENCY & WAS TOLD THAT HE HAD A SPRAINED KNEE. HE WAS PLACED ON 1 DAY RESTRICTIVE DUTY.