RFI - P0478-26-001_45_Maple_Street_Cooroy_SWMP

5.4           Compliance and Regulatory Alignment

The cartridge-based system has been selected to ensure compliance with the following regional stormwater
quality objectives:

•           ≥ 80% reduction in TSS

•           ≥ 60% reduction in TP

•           ≥ 45% reduction in TN

•           ≥ 90% reduction in Gross Pollutants

Proprietary cartridge filtration systems are typically independently tested and verified for pollutant removal
efficiency. Their modular design allows for flexibility in sizing and configuration to suit site-specific inflow volumes,
hydraulic constraints, and spatial limitations.


5.5           Conclusion and Recommendations

The adoption of a cartridge-based filtration system such as the Atlan Filter or a similar proprietary product within
the proposed detention tank offers a space-efficient and high-performance solution for stormwater quality
treatment. The design ensures that:

       •    All regulatory pollutant reduction targets are met or exceeded

       •    The treatment system is seamlessly integrated within the detention infrastructure

       •    Maintenance is streamlined through above-ground or vault access to cartridges

       •    Future refinement during detailed design will optimise treatment area, cartridge count, and bypass
            capacity.

This approach reflects a commitment to best-practice water-sensitive urban design (WSUD), and ensures the
development delivers a sustainable stormwater outcome that protects downstream environments and aligns with
local and state planning policies.




    45 MAPLE STREET, COOROY
                                           24 June 2026                                                 P a g e | 17
    Stormwater Management Plan
    Client Reference: P0478-26-001
    Prepared for Myall Rise PTY LTD