Decommissioning a system
The Water Corporation is installing sewer mains within specific areas of the City of Rockingham as part of the State Government’s Infill Sewer Program.
The availability of sewer mains in your street will mean that your property must be connected within a timeframe specified by the Water Corporation.
When you connect to sewer, you are required to decommission your existing septic tank and effluent disposal system when the following circumstances arise:
- there is a change of ownership of the property (accordingly the owner has 60 days to decommission the septic tank apparatus)
- there is a material change in the use of the premises (accordingly the owner has 60 days to decommission the septic tank apparatus)
- if the foundations for a building on the premises are to be built closer than 1.2m to the septic tank apparatus or a building is to be constructed above the septic tank apparatus or closer than 1.8m to any leach drain or soakwell (accordingly the owner shall decommission the septic tank apparatus before the building work commences).
If you intend to undertake construction within 1.8m of a decommissioned on-site waste water treatment system, the system will need to be removed and not just filled in.
Decommissioning means that:
- all septic tanks, soakwells and/or leach drains are pumped empty by a licensed liquid waste contractor
- all empty septic tanks, soakwells and/or leach drains must be either removed or have their lids and bases broken and filled with clean sand.
When an on-site waste water treatment system is decommissioned, notification should be provided to our Health Services team.