C6361-22-ENG - Feb 2023 - V1

               Table 6.3b Pre Vs Post Developed – Northern Flow Path – CMT 2
                          AEP     Q Pre      Q Post    Variance
                                  (m3/s)     (m3/s)
                          63%      0.54       0.55       2.3%
                          39%      0.72       0.73       2.3%
                          18%      0.99       1.01       2.3%
                          10%      1.19       1.22       2.3%
                           5%      1.42       1.46       2.3%
                           2%      1.79       1.83       2.3%
                           1%      2.05       2.10       2.3%


The increases to peak discharge within the existing overland flow paths are minor and, as
noted in Section 6.1, will not result in discernible adverse impacts downstream of the site.
The existing waterways are heavily vegetated and have limited potential for future
development given the changes to the local area planning provisions and subsequent
downzoning of adjacent allotments.


No onsite detention measures are proposed as part of this development application.

6.4   Water Quality Management Plan


An assessment has been undertaken to determine whether the proposed development is
subject to State Planning Policy (SPP) water quality objectives. Trigger Questions have
been applied to the development to determine if SPP compliance is required. Refer to
Table 6.4a for details.


               Table 6.4a -State Planning Policy Trigger Questions
 SPP Trigger                                                      Response
 REC with Land Area >2500m² and >6 Lots                              No
 OPW with Disturbed Area >2500m²                                     No




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