Effluent Disposal Approval northern unit

                   11. The system design is based upon secondary quality effluent design loading rate as
                       defined in AS/NZ1547 using the AES Design Calculator prepared by a qualified
                       designer. System designs must be verified and signed by the supplier before being
                       submitted to the Local Government.

                   12. A septic tank conforming to AS/NZ 1546.1 and sized in accordance with AS/NZ 1547
                       for the influent hydraulic load from the dwelling is a component of the system. Waste
                       from the septic tank is to be diverted to the AES piping system prior to the system
                       sand and basal area. The septic tank that feeds into the system must be regularly
                       monitored and maintained (including de-sludging) in accordance with AS/NZ 1547 to
                       ensure optimum operation of the system.

                   13. When granting a compliance permit, the local government must satisfy itself that the
                       designer’s choice of the system configuration is optimal for the proposed use and site
                       conditions and that the effluent can be retained within the land application area.

                   14. Each application for a compliance permit to install a system must also be accompanied
                       by a copy of a completed Advanced Enviro-Septic Design Calculator Report endorsed
                       by the supplier, showing the footprint/basal area of the proposed system and number
                       of pipe modules for the site.

                   15. An inspection/sampling point must be installed permanently in the sand immediately
                       below the half-way point of the AES piping system. Where a system is installed in a
                       sloping basal area an additional inspection/sampling point must be installed at the
                       lowest point of the system extension.

                   16. Routine maintenance of the system at set intervals, other than septic tank sludge
                       levels, is not stipulated by the manufacturer/supplier. However, routine monitoring may
                       be required by the Local Government. In the event of failure of the system’s land
                       application area an AES authorised person may need to follow the rejuvenation
                       procedures set out in the manufacturer/supplier’s Design and Installation Manual.

                   17. Where a system installed at a site, has been found not to operate satisfactorily during
                       its service life, and as a result requires modification to achieve the required
                       performance requirements, in particular, water quality limits, the installed system is to
                       be modified accordingly. Any modifications including any of the supplier’s rejuvenation
                       procedure outcomes must be recorded on the service report.

                   18. Permitted use of the effluent is for sub-surface absorption only.

                   19. Each system must be supplied with —

                        (a)    a copy of this Treatment Plant Approval document;
                        (b)    details of the system;
                        (c)    instructions for authorised persons for its installation;
                        (d)    a copy of the owner’s manual to be given to the owner at the time of installation;
                               and
                        (e)    detailed instructions for authorised service personal for its operation and
                               maintenance.




                                                                                           Treatment Plant Approval
                                                                                    Approved by: Lindsay Walker
                                                                                    Delegated Authority
                                                                                    Department of Housing & Public Works

Document Set ID: 21598877
Version: 1, Version Date: 30/08/2021