Between March and June 2006, three loads of 28,000 tonnes of coking naphtha were loaded on board the Probo Koala, a cargo ship owned by Trafigura. Caustic soda and other chemicals are used to clean coking naphtha to make gasoline. This Coker Naphtha cleaning process produced 500 tonnes of toxic waste. Later, Trafigura was faced with the problem of how to safely dispose of all these toxic materials. Amsterdam Port Services, a Dutch waste management company, has agreed to treat and dispose of the waste. While the company was transferring the waste, a foul odor spread over the city. The company decided to check out the product it was going to deal with. Amsterdam Port Services discovered that the toxic waste was much more polluted than they thought, requiring more complicated and time-consuming treatment. The company wanted more money to deal with toxic waste, but Trafigura did not want to pay the asking price. This left Trafigura without a business to dispose of its toxic products.