Further response to information request June 12.06.2020 · MCU19/0117

3. The proposal for filling the lagoon/wave pool via natural rainfall is not
   considered feasible, and it is likely that a supplementary water source would be
   required to fill the lagoon/wave pool, and to maintain the water level. The
   requirement to deliver the water to the site would put undue pressure on
   existing North Shore infrastructure (including the road network and ferry
   service), and would likely impact on resident’s amenity along the route, the
   regular operations of the ferry service during construction, and potentially
   during dry periods where additional water will be required to maintain
   levels. The investigation into ground water impacts is insufficient –
   • Only 1 borehole in wave pool location.
   • Tanks (2.5m high) and Pump house (5m high) buried below clay layer (at
      1.6m deep), possibly penetrating into ground water storage area. Also
      triggers Natural Hazards acid sulphate overlay as 100m3 excavation below
      5 AHD.
   • Wastewater disposal through permeable layer of tank - impacts of wetlands
      in QPWS land and Council.
Acid Sulfate Soils
Please find attached updated layout plans with storage and infiltration tank locations and
depths for earthworks. All cuts are located above 5mAHD and does not trigger the
requirement for an Acid Sulfate Soils impact report.
Groundwater
An Irrigation Management Plan was provided as part of the detailed Engineering and
Operational Works approvals (and is also attached for reference). Section 3.3. of the report
included details as to the Groundwater and Surface Water Quality for the 3.3 ha irrigation
area.
       During effluent treatment and disposal, monitoring of groundwater quality will be
       undertaken annually as specified by the conditions of the preliminary development
       approval. Quarterly baseline monitoring of groundwater quality has been underway
       since December 2004 to determine current groundwater conditions. In accordance
       with the conditions of the development approval, quarterly baseline monitoring of
       receiving waters including groundwater and surface waters will be conducted for a
       minimum of 12 months prior to commencement of construction works for the
       proposed development and will continue during construction and for 2 years after
       completion of construction works.
       Groundwater monitoring will include analysis of pH, Electrical conductivity, Total
       dissolved solids, Biochemical Oxygen Demand, Sodium, Salinity, Chloride,
       Sulfate, Alkalinity, Nitrate and Nitrite, Ammonia, Total Nitrogen, Total Phosphorous
       and Faecal coliforms. The quality of surface water runoff from irrigation areas will
       be monitored where there is a minimum of 30 mm rainfall in the preceding 24 hours
       sufficient to cause runoff from the irrigation area. Surface water monitoring will
       include two event samples of runoff from the irrigation areas collected annually,
       and analysed for pH, Total Nitrogen, Total Phosphorus, Electrical Conductivity, and
       Faecal Coliforms. The discharge limits contained in the Development Code may
       be amended in consultation with the Environmental Protection Agency and Noosa
       Council following determination of existing water quality conditions through
       baseline monitoring. No criteria have been specified for groundwater quality;
       therefore it is proposed that criteria be defined following the completion of baseline
       monitoring which commenced in December 2004. Locations for water quality
       monitoring are presented on Figure 2.




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