What is the basic construction method for sand mounds?

The basic construction method for sand mounds involves layering sand at various depths. This technique ensures proper distribution and compaction of the sand, which is essential for creating a suitable environment for wastewater treatment. The layering process enables the sand mound to effectively absorb effluent and promotes aeration, allowing for efficient percolation through the various layers. By controlling the depth and layering of the sand, the design can optimize the soil absorption system's performance, facilitating better filtration and reducing the risk of clogging.

Other construction methods mentioned, such as draining clay layers, may be applicable in different contexts but do not define the primary method for constructing sand mounds. Compacted soil around the mound and mixing soils are not central techniques in this specific approach, as they could hinder the intended function of the sand mound system.