Attachment C further issues response table 2 stormwater

                                                         As this is clearly shown in the SWMP it is not necessary to update architectural plans which are conceptual
                                                         only. This will be incorporated into the design at detail design phase.

•   Updated the figure in Appendix C of the SWMP         Appendix C has been amended to correctly reflect the bio basin parameters outlined within the report.
    to refer to the correct (updated) filter area and
    correctly label the different elements of the bio-
    detention basin profile/section
•   Explain the reduction in detention volume from
    the original submission and provide further
    details in relation to the detention modelling:
    o    Clarify what initial and continuing loss  ILSAX has been utilized in drains and the hydrological model parameters have now been added to the report
         values have been adopted for pervious and in section 5.1 Table 1
         impervious surfaces in the models,
         consistent with ARR2019 recommendations
         and DataHUB
    o    Provide a comparison of existing and            Rational method peak flow comparison has now been included within the report in section 5.3 Table 3.
         developed (unmitigated) flows estimated
         from the Rational Method and DRAINS in
         order to confirm acceptable results are
         achieved
    o    It appears that rational method results for     Results have been amended to correctly show the drains results.
         the existing site have been compared to
         DRAINS results for the developed site. The
         same hydrologic method should be used
         when comparing results/impacts


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