ADG1673.24 Dewatering Management Plan_Rev0_12.07.24

                                                                                                      ADG Consulting Pty Ltd


     Regardless of the WQOs adopted in this DMP, the General Environmental Duty set out in the EP Act is
     paramount, which requires that “a person must not carry out an activity that causes or is likely to cause
     environmental harm unless the person takes all reasonable and practicable measures to prevent or
     minimise the harm”.
4.3 Proposed water quality objectives
     The proposed water quality objectives that have been developed for the discharge of extracted
     groundwater from the site are provided in the Tables below. All water discharged from the site must
     comply with the discharge criteria provided in Table 2. In addition, the receiving water quality within a
     20 m radius of the discharge point entry to the receiving water shall comply with the receiving water
     criteria provided in Table 3. Receiving waters data will be assessed against background monitoring data
     if non‐compliant results are obtained at the receiving waters monitoring location.

     Table 2 Discharge criteria

                              Parameter                                                       Criteria

       Physico‐chemical
       pH (pH units)                                                                        6.5 – 8.51
       Dissolved oxygen (% saturation)                                                         ≥802
       Suspended solids (mg/L)                                                                 ≤501,2
       Turbidity (NTU)                                                                         ≤502
       Litter                                                                              None visible
       Totals metals (µg/L)
       Aluminium                                                                       No ANZG criteria / 2003

       Iron                                                                            No ANZG criteria / 3003

     Table notes:
     1. QWQG 2009 (2013) Refer to Table 8.2.1. Summary of design objectives for management of stormwater quality and flow –
        construction phase of development in Queensland.
     2. Typical discharge criteria recognised throughout Queensland & NSW.
     3. Criteria subject to anticipated Development Application (DA) notice and conditions by Noosa Shire Council.




ADG1673.24 Dewatering Management Plan_Rev0_12.07.24                                                                       Page 7