To limit the probability of inadequate grading of the building site, which could lead to excessive moisture loading on foundations.
This is to limit the probability of the accumulation of water under hydrostatic pressure, which could lead to:
This is to limit the probability of harm to persons.
To limit the probability of inadequate grading of the building site, which could lead to excessive moisture loading on the soil immediately beneath the footings, which could lead to saturation and a reduction in the soil's bearing capacity, which could lead to the failure of foundation walls and basement floors, which could lead to harm to persons.