Decision Notice plus copy sent to Referral Agencies [As Published] · 132007.2398

                                                                                       2007/2398




Stormwater Drainage
65.   A suitably qualified Registered Professional Engineer, specialising in hydraulics shall prepare
      engineering drawings and specifications for stormwater designs and shall be submitted in
      conjunction with an application for a Development Permit for Operational Works.
66.   Peak discharges of stormwater shall be managed in accordance with the Concept Stormwater
      Management Plan for Cooroy Retirement Village Trading Post Road, Cooroy prepared by
      Brown Consulting dated June 2008 and any subsequent amendments approved by Council.
67.   Stormwater pipelines within the site shall cater for 1 in 10 Years storm event and secondary
      flowpaths shall be provided within the site to cater for 100 years storm event.
68.   The development must not adversely impact on the existing drainage conditions on other
      properties including not depriving dams on other properties of their natural stormwater runoff.
69.   The applicant shall revise the Concept Stormwater Management Plan for Cooroy Retirement
      Village Trading Post Road, Cooroy prepared by Brown Consulting dated June 2008 to detail a
      stormwater treatment train that can achieve Load Reduction Targets for Total Suspended
      Solids, Total Phosphorous and Total Nitrogen in accordance with the Healthy Waterways
      Water Sensitive Urban Design – Technical Guidelines for South East Queensland (2006). This
      revised stormwater treatment train for the site shall ensure that nutrients can be adequately
      treated prior to release off site. The revised Concept Stormwater Management Plan shall
      specify water quality objectives for stormwater prior to it leaving the site to ensure the
      modelled outcomes are achieved. All stormwater runoff treatment must be undertaken within
      the development areas of the site.
      The applicant shall submit an amended plan for Council approval prior to a Development
      Permit for Operational Works being issued.
70.   Stormwater Quality Improvement Devices as detailed within the Concept Stormwater
      Management Plan for Cooroy Retirement Village Trading Post Road, Cooroy prepared by
      Brown Consulting dated June 2008 and any updates approved by Council shall be installed
      within the development to ensure compliance with the designated water quality objectives are
      achieved. Stormwater likely to contain grease and oil (i.e. from carparking areas) shall be
      managed via grease and oil arrestors prior to treatment within bioretention basins and
      wetlands.
71.   Wetlands and bioretention basins shall be designed and constructed in accordance with
      Healthy Waterways Water by Design Construction and Establishment Guidelines: Swales,
      Bioretention Systems and Wetlands February 2009.
72.   A Stormwater Monitoring and Maintenance Plan (SMMP) shall be prepared ensure stormwater
      treatment infrastructure is performing its intended purpose. The SMMP shall be approved by
      the Council’s CEO or delegated officer prior to issue of any Operational Works Approval. The
      SMMP shall specify:
      72.1    performance indicators including water quality objectives;
      72.2    monitoring schedule to ensure specified performance indicators are achieved;
      72.3    maintenance schedule for all elements of the stormwater treatment train;
      72.4    reporting requirements;
      72.5    corrective actions for non compliance with performance indicators; and
      72.6    responsibility framework.
Sewer Mains
73.   The site must be connected to Council's existing sewerage reticulation system by gravity, and be
      constructed in accordance with Council's standards and requirements at no cost to Council.
                                                                                    Page 9 of 32