2017-09-12 Planning & Environment Committee Agenda

PLANNING & ENVIRONMENT COMMITTEE MEETING AGENDA                          12 SEPTEMBER 2017


          b.   Stormwater retention and/or detention systems must be provided within the
               property to ensure all stormwater runoffs from each cumulative stage of the
               development on the site are maintained to its predevelopment rates for all
               storm events up and including 1% AEP.
    48.   The application for operational works approval must demonstrate, through water
          balance calculations prepared by a hydraulic engineer, that the hydraulic residence
          time of the Noosa Springs Lake System will not be reduced as a result of stormwater
          management on each cumulative stage of the development the site.
    50.   For a minimum of 5 rainfall events per year, stormwater at the following locations and
          times must be collected and sampled for Total Nitrogen, Total Phosphorous and Total
          Suspended Solids using NATA accredited methods:
          a.   The release point from Precinct E2 for all waters directed to the Noosa Springs
               lake system.
          b.   At monitoring point W6 shown on Plan A – Water Quality Monitoring Locations
               Noosa Springs by Jelliffe Environmental (Qld) Pty Ltd.
          The time for collection of water samples for monitoring must be quantified by the
          applicant’s hydraulic engineer within the Operational Works application for
          stormwater. The time for water quality monitoring shall be a minimum of the time of
          concentration for all waters from Precinct E2 destined for the Noosa Springs Lake
          System to reach the release point from Precinct E2, and within a maximum of 24
          hours of commencement of rainfall events that generate runoff from Precinct E2.
          Water quality monitoring required by this condition must commence at the
          commencement of operation of the first stage of the development until five (5) years
          following the completion of the final stage of the development
    51.   The annual and long term 90th percentile concentrations of Total Nitrogen, Total
          Phosphorus and Total Suspended Solids measured within runoff from Precinct E2
          must not be higher than the 90th percentile concentrations of those parameters
          measured within the receiving Noosa Springs Lake System. The applicant must
          notify Noosa Council within 24 hours of becoming aware of non-compliance with this
          condition.
    52.   The first application for Operational Works Approval for this development must
          include:
          a.   An overall concept stormwater design for the completed development that is
               able to satisfactorily meet all conditions of this approval.
          b.   A monitoring strategy prepared by a suitably qualified person to demonstrate
               how the water monitoring obligations of this development approval will be met.
          c.   A stormwater infrastructure design that incorporates a facility suitable for
               obtaining the water samples needed to fulfil the obligations of this development
               approval;
    53.   The Operational Works application for stormwater for each stage development must
          demonstrate that all stormwater runoff from hardstand and fertilised landscaped
          areas of the relevant and cumulative stage, including runoff destined for groundwater
          infiltration will be treated to achieve pollution reduction targets to achieve an 80%
          reduction in Total Suspended Solids, 60% reduction in Total Phosphorus and 45%
          reduction in Total Nitrogen compared to an untreated scenario.




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