SSE - TE249167 - 328 Upper Pinbarren Creek Road, Pinbarren Qld 4568

3       Proposed Wastewater System
3.1       Proposed Wastewater System
It is proposed to relace the composing tank leachate drain and the greywater disposal with a partitioned
septic tank and advanced enviro septic (AES) bed. A 10m setback is required to the surface waters, and
as such a pump is required in the second chamber of the septic tank.


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

Table 5: Design Features
                                Feature                           Details
                                Water supply                      Rain water / bore water
                                Volume Allowance                  1503 L/person/day
       Design Volume            Number of bedrooms                1
                                Design population                 2
                                Total Design Volume (Q)           300 L/day
                                Category                          5
     Soil Characteristics
                                Design Loading Rate (DLR)         12 mm/day
                                Septic tank capacity              3000 L (min) partitioned tank, with pump
                                Treatment facility                Advanced Enviro Septic (AES)
     Treatment System
                                Treatment plant approval          06 - 2024
                                Treatment level                   Advanced secondary
                                Required disposal area            A = Q/DLR = 25 m2
        Disposal Area           Footprint as per
                                                                  12.9m x 1.94m = 25 m2
                                AES Design Calculator

The design of the AES system is presented in Appendix A.
The Advanced Enviro-Septic Approved Design Calculator is presented in Appendix B.
The AES Treatment Plant Approval is presented in Appendix C.

General requirements and notes
   • 100% reserve area to be kept clear of permanent structures
   • Deep rip base of beds 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 system 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
    Conservative volume allowance, as composting toilets have very low discharge volumes
Site and Soil Evaluation                                               328 Upper Pinbarren Creek Road, Pinbarren Qld 4568
Taylor Environmental (Australia) Pty Ltd                                                                      Page 6 of 19