MCU14/0056 - Attachment G - Engineering Report & Stormwater Management Plan

                            Cnr Myall Street & Ferrells Road Coorroy, QLD 4563
                                             State Planning Policy December 2013 - Healthy Waters (DERM)
                                                Performance Outcome Criteria and Acceptable Outcomes

                          measures                      • potential soil loss rate, or
                                                        • monthly erosivity, or
                                                        • average monthly rainfall
                                                        2. Collect and drain stormwater from disturbed soils to sediment basin for design storm event:
                                                        • design storm for sediment basin sizing is 80th% five-day event or similar
                          Design storm for              3. Site discharge during sediment basin dewatering:
                          sediment                      • TSS < 50 mg/L TSS, and
                          control basins                • Turbidity not >10% receiving waters turbidity, and
                                                        • pH 6.5–8.5
                          Sediment basin
                          dewatering

                          Litter and other waste,       1. Avoid wind-blown litter; remove gross pollutants
Water quality
                          hydrocarbons and other        2. Ensure there is no visible oil or grease sheen on released waters
                          contaminants                  3. Dispose of waste containing contaminants at authorised facilities
                          Changes to the natural        1. For peak flow for the 1-year and 100-year ARI event, use constructed sediment basins to
Waterway stability and
                          waterway hydraulics           attenuate the discharge rate of stormwater from the site
flood flow
                          and hydrology
management



    Table B: Post construction phase—stormwater management design objectives
    Application
    (a) Applies to western Queensland and Cape York/ Far North Queensland, for population centres greater than 25,000 persons, and
    (b) For all other climatic regions with population centres greater than 3000 persons.

    Please refer to water quality objectives table in main report for data applicable to this application. Please refer to Table B of SPP (2013)
    for complete data set.