soil absorption field

absorption field, disposal field

absorption field composed of absorption trenches Extent of coarse aggregate indicated by shaded area
A system of trenches containing coarse aggregate and distribution pipes through which septic-tank effluent may seep into the surrounding soil.
References in periodicals archive ?
That, in turn, can result in a larger soil absorption field that further reduces the lot acreage available for redevelopment.
A conventional on-site wastewater system typically consists of a septic tank followed by a distribution box and soil absorption field.
The BOD and solids are discharged to a soil absorption field, where they form an anaerobic layer, or "biomat," within the trench.