RFI - Attachment B - Stormwater management Report · MCU20/0026

           Total runoff volume across NE
           boundary (Node A outflow) = 11.36m3




                                                         Peak flow rate across
                                                         NE boundary = 30L/s


           Figure 5 – XP Storm Results; Post-Developed Model (1% AEP, 10 minute duration)

4      W AT ER Q U AL IT Y M AN AG E M ENT

4. 1        O pe r at io na l Ph a se

The proposed development is not required to meet the QLD Government’s State Planning Policy (July
2017) as the site area does not exceed 2500m2. However, stormwater quality management must still
be undertaken via the application of best management practices (BMP’s) to ensure no adverse impacts
to the downstream environment.

Pollutants typically generated during the operational phase of the development include:

            Litter/gross pollutants;

            Sediment;

            Nutrients (N & P);

            Hydrocarbons (oils and grease); and

            Heavy metals.

Stormwater quality best management practices may be implemented for the development as follows:

            First flush diversion system for roof water diverting the roof water for irrigation purposes

            Gross pollutant filter baskets in field inlet pits collecting runoff from ground areas.

Best management practices have been deemed sufficient for the site area and land use. Refer to
Appendix B for the stormwater management drawing.




11 June 2020                                 Stormwater Management Report                                   7
S20-023                                    40 Park Crescent, Sunrise Beach