Septic tanks are predominately used in rural areas for treatment of waste from individual residents, parks, camping areas and recreational resorts, and institutions such as schools and hospitals. All on-site wastewater eliminates the need for costly municipal sewer in rural areas.
Mainly, the septic tank is used to retain, digest and store raw sewage before the final disposal system. The most common septic tank design consists of two compartments. Sedimentation, sludge digestion and storage, take place in the first compartment. The second compartment is used to protect against sludge and scum carry-over that might escape the first compartment. During the retention period, usually twenty four hours, biological breakdown takes place. If this action is properly designed and maintained, it will produce effluent free of substances.
Tank location must allow easy access of a pump truck. The Septic Tank must be gravity fed and buried as shallow as possible. Local codes will stipulate the distance of setbacks required.