Effluent Disposal Report

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



A 100% reserve effluent disposal area can be obtained on this allotment.


5. INVESTIGATION DETAILS
The investigation carried out at the site included mechanical augered boreholes up to 2000 mm depth
and a series of three permeability test pits located as shown on the attached site report. All testing
carried out was in accordance with Australian Standard 1547 - 2012 “On-site domestic-wastewater
management”.


6. TEST RESULTS AND CONCLUSIONS

 Test No.               Soil               Slope     Setback         Recommended            Beavers
                        Permeability       (m/m)     Distance        Design Irrigation      Gardner
                        (based on test               (m)             Rate (mm/day)          Setback
                        results)Ksat                                                        Distance
                                                                   As per AS/NZS 1547-
                                                                           2012

         PT 1                 0.11

         PT 2                 0.10

         PT 3                 0.10

       Average                0.10          0.05         10*                 3                  1m

*Minimum setback distance from a watercourse (when an Advanced Secondary ASTP is
recommended) required by Noosa Council Policy.
Determination of Soil Category (Table 5.2 of AS/NZS 1547:2012)
 Soil Category           Soil Texture        Structure             Indicative           Indicative
                                                                  Permeability        Drainage class
        BH5
                                                                  (ksat)(m/day)          (Table 5.2)

       Cat 5              Light clay          Moderately            0.06-0.12         Poorly Drained
   (00-2000 mm)                               structured



The Design Irrigation Rate of 3 mm/day was adopted from the above results in Table A1. Noosa
Council`s policy suggests that the use of a primary treated effluent disposal system will be satisfactory
provided:
 Sufficient permeable surface soil overlying rock is present over the disposal area, not less than
    1.2metres depth
 A suitable soil category material (as per AS1547-2012) is encountered.
 A Minimum set-back distance of 50m is obtained.
 Permeability rates are within the required parameters.
 The site is located outside a catchment area.
Not all the above requirements have been met, therefore it is concluded that the use of a primary treated
effluent disposal system is not acceptable.

Page | 2 Borelogging in accordance with AS1726-2017 Geotechnical Site Investigations Code
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