Swmp

 CONCLUSION
This Stormwater Management Report has outlined how the stormwater run-off from the site is to be managed to
comply with the relevant requirements and minimise any adverse impacts to the downstream catchments.

     •    The proposed site stormwater run-off is captured internally and discharge by kerb adaptors into Safari Street
          as the lawful point of discharge. Field inlet pits are provided within the development to capture upstream
          run-off and subsoil drainage from retaining walls to convey it to the point of discharge.

     •    The existing and proposed development site have been modelled for the critical design storm events for the
          site, which found attenuation would be required. Provision of a 4kL attenuation tank with a 58mm low flow
          orifice and 100mm high flow outlet was found to provide mitigate the development such that there will be
          no increase to existing peak flow discharges from the site for the modelled storm events.

     •    During construction, erosion and sediment control measures are to be implemented to minimise potential
          contaminants impacting the downstream receiving environment in line with the objectives of Appendix 2 of
          the SPP. An erosion and sediment control plan shall be developed as part of a submission for Operational
          Works approvals.

     •    As the development is a small residential site that does not significantly alter the pollutant generating
          characteristics of the site, stormwater quality treatment is not proposed for the development.

     •    The proposed stormwater solution is considered to minimise any adverse impacts to the downstream
          environment arising from the stormwater run-off while also meeting the stormwater quantity targets required
          for the development.




Project number 20220130
File RECOR Preliminary Stormwater Management Report - 20220130.docx, 2022-05-19                                Page 13 of 16
Revision 1


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