Allto Construction
How A Septic System Works


                    A typical on-site sewage system consists of two major parts, a septic tank and a leaching bed area. Septic tanks should have two chambers and are generally constructed of concrete, steel, fiberglass or polyethylene, are watertight and are buried underground. The purpose of the septic tank is to separate solids from liquids in the wastewater stream and begin the process of breaking down contaminants. Solids settle at the bottom of the tank and scum floats to the top of the tank. This process occurs without oxygen, so the tank needs to be sealed.


                   Wastewater from the septic tank then flows to the leaching bed area through a distribution box or header line. Leaching beds (sometimes called tile beds, disposal areas or absorption areas) consist of underground perforated pipes or clay tiles, which evenly distribute wastewater over natural soil or imported fill. The purpose of the leaching bed is to further treat the wastewater and remove impurities such as suspended solids, organic chemicals, viruses and or bacteria. The leaching bed disposes of the filtered wastewater into the natural soil and, ultimately, into the groundwater.





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