180616-Response to Information Request. · MCU18/0135

6.3     Water Quality Management Plan


The total site area is 953m² and the proposed land use is urban residential.


An assessment has been undertaken to determine if the proposed development is subject
to State Planning Policy (SPP) water quality objectives. Trigger Questions have been
applied to the development to determine if SPP compliance is required. Refer to Table
6.3a for details.


                Table 6.3a -State Planning Policy Trigger Questions
 SPP Trigger                                                      Response
 MCU with Land Area >2500m²                                           No
   -   That results in >25% Imp Area                                  N/A
   -   That results in ≥6 Lots                                        N/A
 REC with Land Area >2500m² and >6 Lots                               No
 OPW with Disturbed Area >2500m²                                      No




The above Table 6.3a demonstrates that compliance with SPP water quality objectives is
not required for the proposed development.


A rainwater tank will be installed with harvested roof area runoff to be used as a source
of water for non-potable reuse (pool top up) and landscape irrigation. This will provide
some measure of pollutant load reduction of typical nutrients (Total Suspended Solids,
Nitrogen and Phosphorous) by promoting infiltration and biological uptake of stormwater
runoff. The total volume of stormwater runoff discharging to the existing Rapid Infiltration
Pit will also be reduced.


It is proposed to direct hardstand areas to landscaped areas for water quality buffering
and gross pollutant removal wherever possible prior to discharge at the existing Rapid
Infiltration Pit within the Marcus Dunes Court road reserve.
                                                                                          8