2006 Ivory Coast toxic waste dump by Greek shipping company Prime Marine Management Inc. and chartered by Trafigura. Trafigura desired to strip the sulfurous products out of the coker gasoline to produce naphtha, which could then be sold. Instead of paying a refinery to do this work, Trafigura used an obsolete process on board the ship called "caustic washing", in which the coker gasoline was treated with caustic soda. The process worked, and the resulting naphtha was resold for a reported profit of . The waste resulting from the caustic washing would typically include hazardous substances such as sodium hydroxide, sodium sulfide and phenols. On 2
2006 Ivory Coast toxic waste dump full knowledge and approval of the Dutch authorities. After taking on unleaded gasoline in Paldiski it left on 13 July 2006 on a previously-planned voyage to Lagos, Nigeria. In Lagos it unloaded the gasoline. Two offers to unload the slops in Lagos were refused by the captain and on 17 August 2006 the vessel sailed for Abidjan. On 19 August 2006, the "Probo Koala" offloaded more than 500 tons of toxic waste at the Port of Abidjan, Côte d'Ivoire. This material was then spread, allegedly by subcontractors, across the city and surrounding areas, dumped in waste grounds, public dumps, and