On 19 August 2006, the ship Probo Koala off-loaded 528 cubic meters of liquid wastes in the port of Abidjan, Côte d’Ivoire. The material was transferred onto tanker trucks operated by a local contractor, and dumped in twelve different locations around the city. In June 2012, UN Environment received a formal request from the Government of Côte d’Ivoire to undertake an independent and scientific environmental audit of the sites that were impacted by the dumping of wastes of the Probo Koala. The Government wished for UN Environment to determine whether the sites continued to pose risks for the environment or for public health, and to make recommendations about additional or corrective clean-up measures that would need to be carried out in case contamination was detected.