HRP17305.L01.001 Irr

                                                                                                Stormwater Management Plan
                                                                                                      Noosa Civic Car Wash




3            Proposed Development

Figure 3-2 presents the general stormwater management arrangement completed and proposed by PDD for
the QIC Noosa Civic Pty Ltd (PDD, 2017). The stormwater management design by PDD has been highlighted
on this drawing since design has already been completed. The following summarises the proposed land use
changes:
1.       ~ 200 m2 asphalt car park including 1 x existing planter and tree changed to roof area; and
2.       ~ 125 m2 asphalt car park including 1 x existing planter and tree to remain as is.
The change in impervious area is considered to be negligible since the main proposed change in cover type
is from asphalt to corrugated roof. Further, the design proposes discharging the stormwater to the same
stormwater treatment device as the current arrangement. This is considered suitable due to the minimal
proposed modification in impervious area and pollutant source type.




                                                               ~200 m2 proposed roof area:
     ~125 m2 car park area to                                   Roof water collected by
     remain as is:                                                down pipes
      Stormwater runoff from
        existing car park area
        shall    continue     to
        discharge as per the
        existing arrangement




Layout key
        Existing bio swales
        QIC Noosa Civic Pty Ltd roof area
        Car wash parking area - existing car park bitumen
        Stormwater pipe 100mm dia. PVC class SW heavy (UNO)

Figure 3-1      Stormwater management general arrangement highlighted based on drawing by PDD (PDD, 2017)




HRP17305 | 27 February 2018 | Commercial in Confidence                                                                  4