2018-10-15 General Committee Meeting Notes

RECOMMENDATIONS ONLY – NOT THE FINAL DECISION OF COUNCIL
GENERAL COMMITTEE MEETING                                                   15 OCTOBER 2018


        Stormwater Drainage
        37.   The site must be provided with a stormwater drainage system connecting to a
              lawful point of discharge. The works must be undertaken in accordance with an
              Operational Works approval that is issued only where the Operational Works
              application demonstrates the following in particular:
                   Stormwater quantity managed as described in section 4 of the Site Based
                   Stormwater Management Plan for Knowles Group Proposed Aged Care
                   Facility at Goodchap Street by Empire Engineering Revision B dated 3 May
                   2018, with the exception of the following:
                   i.    a stormwater quality treatment system designed in accordance with
                         a MUSIC model prepared in accordance with the Water By Design
                         Guidelines which demonstrates that pollutant reduction targets of
                         90% reduction in Gross Pollutants, 80% reduction in Total
                         Suspended Solids, 60% reduction in Total Phosphorous and 45%
                         reduction in Total Nitrogen can be achieved.
                   ii.   To satisfy Section 4.8 of the MUSIC modelling Guidelines, the nodes
                         provided in the MUSIC model for any proprietary stormwater quality
                         treatment device must be verified by Stormwater Australia as
                         achieving the pollutant reduction and design parameters attributed to
                         the node included in the MUSIC model. Where Stormwater Australia
                         is unable to endorse the node for the proprietary stormwater quality
                         treatment device, the industry accepted bioretention basin node must
                         be provided in the MUSIC model, and redesign of landscaping layout
                         to incorporate any required bio retention device must be provided.
        38.   All vegetated stormwater quality treatment devices must be:
                   designed consistent with the Bioretention Technical Design Guidelines
                   (Water by Design, 2012); and
                   maintained in accordance with the Water by Design (2009) - Maintaining
                   Vegetated Stormwater Assets (Version 1). A copy of this document must
                   be retained on the site together with the approved Operational Works
                   drawings for the stormwater quality treatment system and a detailed life
                   cycle costing of the system attached as an addendum. Records of all
                   maintenance activities undertaken must be kept and made available to
                   Council upon request.
        39.   Any proprietary stormwater quality treatment devices must be routinely checked,
              serviced and cleaned in accordance with the manufacturer’s recommendations.
              Records of all maintenance activities undertaken must be kept and made
              available to Council upon request. Where replacement cartridges or other
              necessary components for the system become unavailable, an alternative
              system is required to be retrofitted into the development to achieve an equivalent
              pollutant reduction outcome.
        40.   Any Site Operator Management Strategy must include the Water by Design
              (2009) – Maintaining Vegetated Stormwater Assets (Version 1) document and/or
              maintenance manual for the proprietary device as appropriate and must include
              the full cost of maintaining the system in accordance with that document.



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