Sewage System Types

Class 5 Sewage System

A Class 5 sewage system consists of a holding tank that is designed and positioned to accept sanitary sewage until the capacity of the tank is reached. Accumulated sanitary sewage in the holding tank is pumped out and hauled away by a licensed waste haulage operator, on a regular basis or when the tank is full.

A Class 5 sewage system may be installed in the following circumstances:

  1. where the proposed use of the holding tank is for a temporary operation, excluding seasonal recreational use, not exceeding 12 months in duration,
  2. to remedy an unsafe sewage system where the installation of a Class 4 sewage system is impracticable,
  3. to upgrade a sewage system serving an existing building, where upgrading through the use of a Class 4 sewage system is not possible due to lot size, site slope or clearance limitations, or
  4. as an interim measure for a lot or parcel of land until municipal sewers are available, provided the municipality ensures that an approved hauled sewage system continues to operate until the municipal sewers are available.

A Class 5 sewage system must be designed to permit all solid matter that might settle to the bottom of the tank to be removed from the tank. The holding tank used in residential dwellings shall have a minimum 7 day holding capacity based on the total daily design sanitary sewage flow but must have a minimum capacity of 9 000 L and be equipped with a warning device that produces an audible and visual alarm when the tank is nearing full capacity. The owner of a Class 5 sewage system shall have a written agreement for the disposal of the sanitary sewage with a licensed waste haulage operator.

Further information can be accessed by visiting the Ministry of Municipal Affairs and Housing Building and Development Branch Website.