Apdx 4 - SWMP

                                                                                                             ingeniir




                                   Plate 2: Infrastructure North of Site (Site highlighted Green)

It is achievable to maintain acceptable flows to Coral Tree Avenue from the site in accordance with IPWEAQ
standard drawing RS-081. It is noted that RS-081 applies to roof-water connections which implies that a 5%
AEP is the design event for the 25L/s per discharge location as per note 4.

The developed site in a 1% AEP event is expected to discharge a maximum of 55L/s (a pre-development
increase of 2L/s), and 38L/s in a 5% AEP with 2 proposed discharge points and will therefore comply with the
requirements of RS-081 without the need for on-site mitigation. Refer Appendix 2 | Rational Method
Calculations for pre and post development rational method calculations for the site.


5.        STORMWATER QUALITY
5.1       Construction Phase

The State Planning Policy (DILGP, 2017) Appendix 2 – Stormwater management design objectives
Table A: Construction phase – stormwater management design objectives outlines construction phase
requirements for stormwater quality.

The following manuals (as a minimum) should be read and implemented by any contractor proceeding with
the development construction;

      •   State Planning Policy Appendix 2 Table A – available here

                                                Ingeniir Pty Ltd | 221304-SMP-01
                  ABN: 99 642 485 363 | PO Box 988 Maroochydore QLD 4558 | [email protected] | 0404157187
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