When the design is complete, and then examine the quantity of soil based on the quantity of soil is enough to leave or not. If it is not enough to go back to doing design that leaves the soil again.
Once the design is complete, so check that enough soil volume by the volume of soil that needs to be discarded or not. If not enough, it needs to be designed to leave the ground again.
When the design, then check the quantity according to the quantity of soil soil well enough to leave or not. If not enough, they must return to the design, leaving the soil again.