Development Application part 7 of 10 Stormwater Management Report - MCU13/0092

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                                                                                                         ASN 89106 675156




5.5.1     Enviropods

The EnviroPod is a gully pit insert designed to be easily retrofitted into new and existing stormwater gullypits. It
removes a significant portion of sediment, trash, debris and other pollutants from water entering the stormwater

system, and can be installed in either kerb inlet, standard pre-cast gully pits or manhole gully pits. The EnviroPod can
be customised to meet site-specific requirements with interchangeable monofilament mesh screens ranging from 200
t01600 micron pore size.


The EnviroPod consists of a screening bag supported by a fillterbox and structural cage. Modular plastic deflector
panels attach to the filterbox and guide the flow of water to the screening bag. The screening bag captures pollutants
and allows the water to pass through to the outlet pipe. Openings in the filterbox allow water to bypass the screening
bag during high flow conditions to prevent surface flooding.

The use of EnviroPods as part of the treatment train prior to the Stormfilter will decrease the required maintenance
for the Stormfilter system.



5.5.2     Stormfilter System


StormFilter is a passive, flow-through stormwater filtration system. It consists of vaults that house rechargeable
cartridges filled with a variety of filter media. The filter systems are installed in-line with storm drains. The StormFilter
works by passing stormwater through media-filled cartridges, which trap particulates and adsorb materials such as
dissolved metals and hydrocarbons. After being filtered through the media, the treated stormwater flows into a
collection pipe or discharges into an open channel drainage way.


The StormFilter is a passive stormwater filtration system designed to improve the quality of stormwater runoff from
the urban environment before it enters receiving waterways.


Through independent third party studies, it has been demonstrated that the StormFilter is highly effective for
treatment of first flush flows and flow-paced flows during the latter part of a storm. In general, Storm Filter’s efficiency
is highest when pollutant concentrations are highest. The primary target pollutants for removal are: sediments (TSS),
soluble metals, soluble phosphorus, nitrates, and oil and grease.


The StormFilter is designed to siphon stormwater runoff through a filter cartridge containing media. The variety of
media available can be designed to act as a mechanical filter to remove sediments, as an ion exchanger to remove
dissolved heavy metals, and as an absorber to remove oils and greases.



5.5.3     Rainwater Tanks


Rainwater tanks will be used on the site to both provide water for reuse and improve the quality of the stormwater
runoff.


Rainwater tanks assist in the removal of stormwater pollutants such as coarse sediments through the reuse of water
for toilet flushing, irrigation and cleaning.


The rainwater tank will consist of a 12kL underground tank for clean water (roof runoff) for each site. Overflow from
the tank will be discharged to the underground drainage system which discharges in the Stormfilter system.




                                                         P age   114

Level 2, 39 Sherwood Road                         [email protected]                                     P: 07 3870 8888
Toowong QLD 4066                                 www.icubed.com.au                                       F: 0738708988