The vessel in Port of Hereke Diler named M/V Altenavi vessel spilled fuel from deck vessel overflow during fuel transfer. As a result of this event port, vessel, and coastline contaminated with oil. Mavi Deniz Environmental Services Co. implemented oil spill response operation with oil recovery vessel, oil barrier, trained personnel, and other equipment within an hour. Sea and cleaned and the operation was completed in 03.03.2011. Collected waste has submitted to IZAYDAS waste disposal facility.