First of all, what happens to the solids in the tank? These are organic compounds, and as they build up in the tank, they tend to trap dirt and debris, which clog the system. This can cause damage to the pump seal, and even to the storage unit in which it is kept.
The first thing that you will want to do is remove the solids from the tank, and this is where a tank pumping equipment comes into play. There are various different types of pumps that you can use, but the one that is most frequently used is a high-pressure pump, which is also often called a submersible pump. These pumps are placed inside the tank, and there is a hose attached that gets into the tank and out of the water. Once you have pumped the tank out, the pump can be removed and washed.
Now that you know how to decommission a chemical tank, there are other things that you need to take care of. It is important to keep the area around the tank clean, as it will still collect chemicals even after it is cleaned up. For full details on Decommissioning, visit a site like Soilfix. You should also get rid of any materials left behind by the old tenants of the chemical storage area, such as insulation. This will make it easier to get the tank decommissioned properly.