Effluent Disposal Report

                                                                                                 PH: 07 54 740 900
                                                                               3/53 Gateway Drive, Noosaville 4566
                                                                                    [email protected]



7. RECOMMENDATIONS

            The Design Irrigation Rate of 3 mm/day be adopted.
            The site be provided with an “Aerated wastewater-treatment system” capable of
             producing Advanced secondary effluent, or an equivalent system, to council’s approval
             in lieu of a septic tank.
            The disposal system be by, # A Fixed Surface Spray Irrigation System, as per AS/NZS
             1547:2012. Purple line is to be used from the ASTP to the irrigation area.
            An in-line Filter is to be installed between the Treatment Plant and the Irrigation System.
             Regular maintenance of the Filter shall be undertaken, according to the manufacturer’s
             requirements.
            The area shall be surrounded by a 150 mm high earth mound or similar.
            The spray irrigation system shall distribute the effluent evenly (Via a K-Rain Valve)
             within the designated area through coarse spray heads suitable for use with effluent and
             shall not produce aerosols. All ‘plumes’ shall be evenly distributed and fixed in place
             with a height of approx. 0.3 m and have a throw of no greater than 2.0 m. It is estimated
             that approximately 35 plumes would be required.
            Non-return valves and flush-out valves should be installed on irrigation lines.
            Evergreen plants shall be planted (minimum of 35 plants) to maximize evapo-
             transpiration. The area is to be mulched.
            The disposal area required is 360m2.
             A daily flow rate of 1080 litres/day (9 people @120 L per person/ per day) has been
             adopted with a Design Irrigation Rate of 3 mm/day. This flow rate will accommodate the
             proposed 6-bedroom residence only. A 100% reserve area (as per site plan) is to be kept
             free of buildings and traffic.
            The disposal area should be located in the vicinity of PT 1, PT 2, and PT 3 as per attached
             site plan.
            All set-back distances as required by the local authority shall be met.
             At least two signs stating “Recycled water- Do not drink” are to be erected on boundaries.
            Stormwater run-off including roof water from buildings shall be diverted around and
             away from the disposal area. Imported fill may be required should there be insufficient
             soil available for the design of the disposal system.
   Please note: Personal Hygiene Products, Bleaches and detergents high in phosphorous will damage the capabilities of the
   Treatment System’s performance. Information should be sought by the Treatment System’s manufacturer for a guide of
   suitable products acceptable for the system.

8. CERTIFICATION
The local authority may request that an inspection and certification is undertaken on the installation
of the system when nearing completion. The installer must contact Noosa Council prior to ‘burying’
the system, if certification is required.

Yours Sincerely,




Michael S. Pinkney (Office Manager)




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