ABIDJAN, June 19 (Reuters) - Ivory Coast is seeking an initial $82 million and a maximum of $461 million from oil trader Trafigura to cover depollution and medical costs stemming from a toxic waste dumping case, the presidency said on Tuesday. Presidential spokesman Gervais Coulibaly said this money would be in addition to a settlement in February in which the Dutch-based trader agreed to pay $198 million to compensate victims of the dumping, in which 16 people died and thousands were made ill by slops unloaded from a Trafigura-chartered ship.