a pressure-dosed absorption system in a sand fill that is elevated above the natural soil surface
a soil absorption system that is elevated above the natural soil surface in a suitable fill material
a soil absorption system that is elevated above the natural soil surface utilizing suitable fill material, horizontal perforated distribution pipes, and standpipes.
leach bed built on a mound of fine to medium-grained sand to elevate it above the seasonal high water table and/or to accommodate a system on a hillside.