MCU25 0079 - Negotiated Reference Documents (As Published)

                    Best Practice Erosion And Sediment Control                     Erosion Hazard Assessment Form


                    [6]     REQUIREMENTS:
                            All developments that involve earthworks or construction within a natural
                            watercourse (whether that watercourse is in a natural or modified condition) must
                            submit a conceptual ESCP to the regulatory authority for review and/or approval
                            (as required by the regulatory authority) during planning negotiations.

                            Permits and/or licences may be required from the State Government, including
                            possible submission of the ESCP to the relevant Government department.

                    [7]     REQUIREMENTS:
                            No areas of soil disturbance shall be left exposed to rainfall or dust-producing
                            winds at the end of a development without an adequate degree of protection
                            and/or an appropriate action plan for the establishment of at least 70% cover.

                            COMMENTS:
                            Grass seeding without the application of a light mulch cover is considered the
                            least favourable revegetation technique. A light mulch cover is required to
                            protect the soil from raindrop impact, excessive temperature fluctuations, and the
                            loss of essential soil moisture.

                    [8]     COMMENTS:
                            All receiving waters can be adversely affected by unnatural quantities of
                            sediment-laden runoff. Freshwater ecosystems are generally more susceptible to
                            ecological harm resulting from the inflow of fine or dispersible clays than saline
                            water bodies. The further inland a land disturbance is, the greater the potential
                            for the released sediment to cause environmental harm as this sediment travels
                            towards the coast.

                            For the purpose of this clause it is assumed that all sediment-laden runoff will
                            eventually flow into saline waters. Thus, sediment-laden discharges that flow first
                            into freshwater are likely to adversely affect both fresh and saline water bodies
                            and are therefore considered potentially more damaging to the environment.

                            This clause does not imply that sediment-laden runoff will not cause harm to
                            saline waters.

                    [9]     COMMENTS:
                            This clause refers to subsoils exposed during the construction phase either as a
                            result of past land practices or proposed construction activities. The exposure of
                            subsoils resulting from the excavation of minor service trenches should not be
                            considered.

                    [10] WARNINGS:
                         The greater the extent of external catchment, the greater the need to divert up-
                         slope stormwater runoff around any soil disturbance.

                            COMMENTS:
                            The ability to separate “clean” (i.e. external catchment) stormwater runoff from
                            “dirty” site runoff can have a significant effect on the size, efficiency and cost of
                            the temporary drainage, erosion, and sediment control measures.




                    IECA (Australasia)                           November 2008                            Page 6

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