Judgment - Stockwell v Noosa Council - PEC Appeal 1998 of 2024 - 26.06.25 · MCU22/0094

6.4.3.9 Surfactants

Washing of cars is not expected on site for the proposed development, as a result surfactants should not
be an issue for the drainage system.

6.4.3.9.1 Heavy Metals

Heavy metals in stormwater runoff generally become attached to fine sediment. The bioretention basins
and the Jellyfish filters will remove the majority of this fine sediment. The removal of the fine sediment
should effectively remove most of the heavy metals in the runoff.

6.4.3.9.2 Pathogens/Faecal Coliforms

Domestic animals within the development will be under the control of their owners at all times and the
owners will be expected to clean up after them.

6.5       Proposed Stormwater Quality Treatment Devices
6.5.1     Locations

The location of the proposed stormwater quality treatment device is shown on MPN Plan 9307-CP.1.01,
attached in Appendix C.

6.5.2 Device and Size

The device type and size are depicted on MPN Plan 9307-CP.1.01, attached in Appendix C.

6.5.3 Operation

The bioretention basins operate by filtering runoff through densely planted surface vegetation, then
percolating the water through a sandy loam filter media with details as per MPN Plan 9307-CP.1.01,
attached in Appendix C. As the water is percolated through the soil, pollutants are captured by fine
filtration, adsorption and biological uptake.

The OceanProtect Jellyfish filters operate by using a high flow membrane cartridge filtration at low
driving head, with a large surface area to effectively filter stormwater. As the stormwater percolates
through the cartridges, pollutants, particulates, surface scums and floating oil and greases are captured
within the filter media. Once filtered through the media, the treated stormwater is directed to a collection
pipe.




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Inspired engineering

10 April 2025
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https://mpncnetau.sharepoint.com/sites/Administration/Shared Documents/9000-9999/9300-9399/9307/Reports/10-04-25 Stormwater Management Plan_Issue G.docx