2019-03-18 General Committee Meeting Notes

RECOMMENDATIONS ONLY – NOT THE FINAL DECISION OF COUNCIL
GENERAL COMMITTEE MEETING                                                     18 MARCH 2019

            a.    A suitably qualified and experienced professional must provide
                  independent verification that the parameters within the node for the device
                  in MUSIC modelling have been tested and verified as per Stormwater
                  Australia (2018) Stormwater Quality Improvement Device Evaluation
                  Protocol. Version 1.2 December 2018 to achieve the predicted outcomes
                  in the MUSIC model for the development. For the purpose of this condition,
                  the suitably qualified and experienced professional must be able to
                  demonstrate a minimum 10 years urban stormwater testing and modelling
                  experience and be verified in writing by Stormwater Australia as having an
                  appropriate reputation and track record within the stormwater industry to
                  provide such independent advice.
            b.    Where testing to achieve the certification of the proprietary stormwater
                  quality improvement device is from an area with rainfall intensities and
                  patterns that are statistically inconsistent with the region of the Noosa Shire
                  that the device is to be installed, and / or the size of the development the
                  device has been tested on is more than 2500m2 smaller than the
                  development the device is proposed to service, the following additional
                  conditions apply:
                  i.    The proprietary stormwater device treatment train must be tested and
                        re-verified in accordance with the Stormwater Australia (2018)
                        Stormwater Quality Improvement Device Evaluation Protocol.
                        Version 1.2 December 2018. A suitably qualified and experienced
                        professional, as verified by Stormwater Australia must use the results
                        from the onsite testing to re-run the MUSIC node for the proprietary
                        devices and confirm whether or not the required pollutant reduction
                        efficiencies of 80% reduction in Total Suspended Solids, 60%
                        reduction in Total Phosphorous and 45% reduction in Total Nitrogen
                        for the overall development are delivered.
                 ii.    Where the field results and re-run MUSIC node demonstrate the
                        required pollution reduction efficiencies for the development are not
                        met, the applicant must implement additional measures to achieve
                        the required pollution reduction targets. The additional measures
                        must include, in order of priority, elevated maintenance, and then
                        increased treatment capacity of the stormwater quality improvement
                        devices. Following application of additional measures, the system
                        must be retested in accordance with Stormwater Australia (2018)
                        Stormwater Quality Improvement Device Evaluation Protocol.
                        Version 1.2 December 2018. Where pollution reduction targets
                        continue to not be demonstrated the proprietary device must be
                        removed and replaced with a bio-retention device constructed in
                        accordance with an Operational Works approval or the applicant
                        must enter into an agreement with Council to provide improved water
                        quality outcomes within the catchment area.
                 iii.   A separate water quality performance bond must be provided prior to
                        any pre-start meeting for the development. The water quality
                        performance bond must be 150% of the cost of water quality
                        monitoring required to comply with Stormwater Australia (2018)
                        Stormwater Quality Improvement Device Evaluation Protocol.
                        Version 1.2 December 2018. The performance bond will be
                        incrementally returned annually for the value of monitoring works

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