 On it offloaded a liquid waste in Abidjan, paying around €18,500 for its disposal.According to the City of Amsterdam's report, before it dumped the waste in Abidjan, the "Probo Koala" was in port in the Netherlands from 2 to 2006.There the ship attempted to have the waste processed in Amsterdam, but "Amsterdam Port Services BV", the company that had contracted to treat the waste, refused after its staff reported a noxious odor coming from the waste, which sickened several workers.