App D - Effluent

2.3      Soil Investigation
The soil profile and design characteristics for the effluent disposal area are presented in Table 3.

Table 3: Soil Type
                                BH1                                                          BH2
                                Sandy Clay Loam                                              Sandy Clay Loam
      0 – 500                        Brown                          0 – 500                       Brown
                               Medium plasticity                                            Medium plasticity
                                Sandy Light Clay                                             Sandy Light Clay
    500 – 1000                       Brown                         500 – 1000                     Brown
                             Medium to high plasticity                                    Medium to high plasticity
                                                    Design Characteristics
 Texture                                       Clay Loam over Light Clay
 Structure                                     Moderately structured
 Category                                      5
 Indicative Permeability (Ksat)                0.06 – 0.12 m/day
 Design Loading Rate (DLR)                     10 mm/day for secondary effluent


3      Proposed Wastewater System
3.1      Proposed Wastewater System
Due to the proposed location of the cabins and their proximity to waterways, macerating sewage pump
stations are required at the buildings to transfer influent to an on-site sewage facility located away of
environmental constraints. The ‘advanced secondary’ facility (treatment plant and land application area,
as defined by QPW Code 2024), must be at least 10m from the bank of a watercourse, and will be
positioned to the south of the cabins.

A subsurface land application area consisting of piped trenches will be installed for the disposal of
treated effluent.


3.2      Design Details
Table 4 below presents the features of the proposed wastewater system.

Table 4: Design Features
                                Feature                         Details
                                Water supply                    Bore water and rain water
                                                                150 L/person/day
                                Volume Allowance
                                                                (note: bathtubs and laundries not provided)
      Design Volume             Number of bedrooms              2x 1-bedroom cabins
                                Design population               4 people
                                Total Design Volume (Q)         600 L/day
                                Category                        5
    Soil Characteristics
                                Design Loading Rate (DLR)       10 mm/day
      Pump Stations             Pump stations at buildings      600L (min) pre-packaged macerating pump stations
                                Treatment plant                 Aussie Treat Model 20
    Treatment System            Treatment plant approval        09 - 2022
                                Treatment level                 Advanced Secondary

Site and Soil Evaluation                                             Proposed Cabins - 486 Tablelands Road, Cooran Qld 4569
Taylor Environmental (Australia) Pty Ltd                                                                        Page 6 of 22