SSE - TE249167 - 328 Upper Pinbarren Creek Road, Pinbarren Qld 4568

                          TREATMENT PLANT APPROVAL 06/2024
                       Plumbing and Drainage Regulation 2019, part 4.

11.   A septic tank conforming to AS/NZ 1546.1 and sized in accordance with AS/NZ 1547 for
      treatment of all daily flows of domestic wastewater from the premises is a component of the
      system. Effluent 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.

12.   Where gravity cannot be achieved to transfer effluent from septic tank to the AES treatment pipes:

            (a) A pump well is to be used and sized as per AS/NZ1547:2012 and maintain at least 24-
                hour emergency storage above the high-water level alarm sensor.

            (b) The pump is to be a submersible type with high level alarm as specified in both
                AS1546.3:2017 and AS/NZ 1547:2012. The pump shall be a Davey D25VA or equivalent,
                with a design flow of 40 L/min at a minimum 6 m head. Should site conditions require a
                higher head, then the appropriate pump model to achieve this shall be selected.

            (c) In each situation, the design of the AES system must confirm with the manufacturer’s
                design recommendations set out in the AES Calculator & Design and Installation Manual.

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 AES 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.



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