Abstract: Contaminated soil including rocks is mechanically screened to remove most of the soil from the rock. The rocks are then further screened and a liquid is sprayed over the rocks to wash the remaining contaminants from the rocks. The rocks are then recycled back to the original location. The wash fluid with the remaining contaminants is further screened, with the remaining fluids centrifuged in combination with the addition of a polymer to promote flocculation and further separation. The remaining liquid is recycled as spray wash liquid at the beginning of the process. The flocs and screened material are transported to a waste disposal site.