What is typically required of soils under less-than-ideal conditions for mound systems?

In less-than-ideal conditions for mound systems, meticulous hand spading is usually required due to the challenging soil characteristics that may impair drainage and the proper functioning of the septic system. Hand spading allows for careful manipulation and preparation of the soil, ensuring that soil compaction and surface unevenness are managed effectively. This method helps to improve aeration and allow for proper water absorption, which are critical for the absorption and treatment of effluent in mound systems.

The other approaches, while they each have their merits in different contexts, do not address the specific needs of preparing soil in challenging conditions. Deeper excavation might be necessary in some cases, but it does not guarantee improved function in soils with poor drainage. Chemical treatments can modify soil properties, but they are not a standard requirement for mound systems and could lead to environmental concerns. The notion of no additional work is not suitable for sites with limitations, as insufficient preparation can lead to system failure or environmental contamination.