It can be disposed of in many different ways. Depending on the concentrations in the material and the media itself. For water, it can be solidified by pouring cement into it and then landfilling it or it may be able to be treated through a water treatment system (either public or private). For soil media, it may go to a normal landfill or it may need to be sent to a special hazardous waste landfill. Soil can also be incinerated at specialized hazardous waste incineration facilities (although that is quite expensive).