SUPERSEDED - Reference Documents - MCU25 0079

                            Pollutant                                             Sources

                  Litter (Gross Pollutants)        Paper, construction packaging, food packaging, cement bags.

                  Sediment                         Unprotected exposed soils and stockpiles during earthworks and building.

                  Hydrocarbons                     Fuel and oil spills, leaks from construction equipment.

                  Toxic materials                  Cement slurry, asphalt prime, solvents, cleaning agents, wash waters.

                  pH altering substances           Acid sulphate soils, cement slurry and wash waters.

                 In addition to the degradation of receiving waters, impacts of inadequate erosion and sediment control
                 downstream from the site include:

                     •    traffic safety problems;
                     •    blocked drains;

                     •    local flooding problems;

                     •    aesthetic pollution of drainage paths; and

                     •    damage to local ecosystems.


                 4.2.1 De si gn O bj e ct i v es

                 Management of stormwater runoff during construction should be undertaken in accordance with
                 Appendix 2 of the SPP (July 2017). The SPP outlines the design objectives for construction phase
                 stormwater management. These are presented in Table 5, Table 6 and Table 7.

                 Table 5 – SPP Appendix 2: Part 1 Construction Phase – Stormwater Management Design Objectives

                              Issue            Desired Outcomes




                  Drainage Control             1. Manage stormwater flows around or through areas of exposed soil to
                                                  avoid contamination.

                                               2. Manage sheet flows in order to avoid or minimise the generation of rill or
                                                  gully erosion.
                                               3. Provide stable concentrated flow paths to achieve the construction
                                                  phase stormwater management design objectives for temporary
                                                  drainage works (part 2).

                                               4. Provide emergency spillways for sediment basins to achieve the
                                                  construction phase stormwater management design objectives for
                                                  emergency spillways on temporary sediment basins (part 3).

                  Erosion Control              1. Stage clearing and construction works to minimise the area of exposed
                                                  soil at any one time.

                                               2. Effectively cover or stabilise exposed soils prior to predicted rainfall.




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Document Set ID: 23959990
Version: 1, Version Date: 23/07/2025