Appendix H - Engineering Services Report Part 1 of 2

5          STORMWATER MANAGEMENT

A stormwater management plan has been prepared under separate cover. A summary of the stormwater
management plan is provided as follows:
Water quality objectives have been demonstrated to be achieved through the implementation of a
treatment train that incorporates gross pollutant traps/filter bags and a ZPG Storm filter system to reduce
total suspended solids (TSS), total phosphorus (TP), total nitrogen (TN) and gross pollutants.
Appropriate erosion and sediment control measures will be required to be prepared and implemented on
site during construction activities in order to minimise water quality impacts during the construction
phase.

The stormwater quantity management assessment demonstrates that overland flow within the network is
reduced as a result of this development by the inclusion of the pipe network on the development site.
Gateway Drive will therefore benefit as result of reduced overland flow contributing to the road.

A PC-drain analysis determined that the proposed internal stormwater network was sufficient to
accommodate 10 year ARI flows.

Notwithstanding the assessment, further detailed design of the internal stormwater system and
connection to the existing pipe network will be required to be undertaken as part of the future
Operational Works application for the development.


6          SEWERAGE

Operational Works drawings obtained through Councils’ online development service show approved
plans for the construction of a sewer manhole serviced by a DN160 PE100 pipe in the northern corner of
the site. Preliminary site investigations confirmed that this has already been constructed.



7          WATER SUPPLY

Operational Works drawings obtained through Councils’ online development service show approved
plans for the construction of a 50mmØ house connection and 150mmØ fire service connection located in
the south west corner of the site.




205-002-003R                              Mogpropmanagement Pty Ltd                                  Page 4
Engineering Report / Rev 1                 Gateway Drive, Noosaville
3/10/2014