In order to pass a septic inspection, the system must meet all the regulations that were in affect when the septic system was installed. All tanks installed after 1983 are required to have main access risers no deeper than 12 inches below grade. Therefore, if the system was installed prior to 1983 a riser will be recommended, but not required. After 1983 all tanks are required to have main access pipes if the septic tank is more than 12 inches deep.
Posted in: Septic Inspection