3461EffluentDisposalRep · MCU14/0060

6.      RECOMMENDATIONS
         The Design Irrigation Rate of 20mm/week be adopted.
         The existing Advanced Secondary ASTP (Taylex ABS) is to be utilized, while the
          downhill septic tank and pump well (near the Dam) is to be utilized also.
         The existing irrigation method is to be disconnected.
         The new disposal system be by, # A Fixed Surface Spray Irrigation System, as per
          AS/NZS 1547:2000. Purple line is to be used from the Taylex ABS to the irrigation area.
          The disposal area is to be fenced (minimum 1200mm high), to restrict human and
          vehicular traffic.
         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 manufacturers
          requirements.
         The area shall be surrounded by a 150mm 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. 0.3m and have a throw of no greater than 2.0m. It is estimated
          that approximately 42 plumes would be required.
         Non-return valves and flush-out valves should be installed on irrigation lines.
         The disposal area should be rotary hoed to a depth of 200mm and gypsum added.
          Evergreen plants/vegetation/turf shall be planted to maximize evapo-transpiration.
         The disposal area required is 658m2.
          A daily flow rate of 1880 litres/day (8 caravan sites/ 16 persons @ 100 litres per
          person/per day, and the existing 1 bedroom residence/office (2 persons @ 140 litres per
          person/per day) has been adopted with a Design Irrigation Rate of 20mm/week, using
          Standard Water-reduction fixtures (Standard water-reduction fixtures include dual
          flush 6/3 litre (minimum) water closet, shower-flow restrictors, aerator faucets, and a
          water-conserving washing machine). These fixtures must be installed. This flow rate
          will accommodate the existing 1 bedroom residence/office and the
          8 x caravan sites using standard water-reduction fixtures 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 roofwater 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.(some examples attached to this report).
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 (Laboratory Manager) Report 15/0583-2 EDR-page3