App D - Effluent

                                Feature                        Details
                                Disposal method                Trenches with Ø100 slotted pipe
       Disposal Area            Required disposal area         A = Q/DLR = 60 m2 + equivalent reserve area
                                Install as                     6 trenches x (0.6m wide x 17m long) = 61 m2

The design of the system is presented in Appendix A.
The Treatment Plant Approval is presented in Appendix B.

General requirements and notes
   • Flow meter to be installed on pump main between OSSF and LAA
   • 100% reserve area to be kept clear of permanent structures
   • Deep rip base of trenches and spread gypsum at 1kg/m2
   • Grass is to be established in the land application area, and mown regularly
   • Stormwater should not traverse the land application area. Construct a stormwater diversion
        upslope
   • General access to the land application area by pedestrians, vehicles and animals is to be
        generally excluded
   • Install at least 2x ‘effluent reuse’ warning signs around land application area
   • The treatment plant is to be installed, operated and serviced in accordance with manufacture
        specifications
   • The land application area has been designed based on a daily wastewater volume in accordance
        with AS1547. Any exceedance of this design volume may have adverse effects on the land
        application area


3.3      Effluent Quality
Table 5 below presents the effluent standards produced by approved wastewater treatment systems
with subsurface disposal, as per AS1546.3:2017 Secondary Treatment Systems.

Table 5: Effluent Quality
                                                     Secondary Effluent              Advanced Secondary Effluent
                 Parameter
                                              90% of samples       Maximum           90% of samples           Maximum
                     BOD5                         < 20 mg/L         30 mg/L             < 10 mg/L              20 mg/L
                      TSS                         < 30 mg/L         45 mg/L             < 10 mg/L              20 mg/L

The proposed treatment plant has approvals for Advanced Secondary effluent.




Site and Soil Evaluation                                          Proposed Cabins - 486 Tablelands Road, Cooran Qld 4569
Taylor Environmental (Australia) Pty Ltd                                                                     Page 7 of 22