SEPTIC TANK SOIL ABSORPTION SYSTEM (ST-SAS)

A conventional wastewater treatment process used in isolated, rural, and other areas where normal sewer systems are not available whereby effluent is treated in a Septic Tank, then fed to soil-based disposal fields or trenches by gravity or under pressure. The quality of the ensuing filtration and absorption treatment is directly linked to soil and sit characteristics such as permeability, drainage, slope, and depth to limiting conditions such as groundwater or bedrock. Unfortunately, many soils are classified as unsuitable for conventional soil absorption systems. Under such unsuitable soil conditions, alternative pretreatment systems may be employed to include sand filters, mound systems, evapotranspiration systems, low pressure pipe systems and a more complex drip soil absorption system. Also see Drip (Trickle) Soil Absorption System.