S25-107-Stormwater Report

Best Practice Erosion And Sediment Control                   Erosion Hazard Assessment Form


[11] REQUIREMENTS:
     Permission must be obtained from the owner of a road reserve before placing
     any erosion and sediment control measures within the road reserve.

      WARNINGS:
      Few sediment control techniques work efficiently when placed on a road and/or
      around roadside stormwater inlets. Great care must be taken if sediment control
      measures are located on a public roadway, specifically:
       • safety issues relating to road users;
       • the risk of causing flooding on the road or within private property.

      The construction of roads (whether temporary or permanent) will usually modify
      the flow path of stormwater runoff. This can affect how “dirty” site runoff is
      directed to the sediment control measures.

      COMMENTS:
      “On-road” sediment control devices are at best viewed as secondary or
      supplementary sediment control measures. Only in special cases and/or on very
      small projects (e.g. kerb and channel replacement) might these controls be
      considered as the “primary” sediment control measure.

[12] WARNINGS:
     Soils with a pH less than 5.5 or greater than 8 will usually require treatment in
     order to achieve satisfactory revegetation. Soils with a pH of less than 5
     (whether naturally acidic or in acid sulfate soil areas) may also limit the choice of
     chemical flocculants (e.g. Alum) for use in the flocculation of Sediment Basins.

[13] REQUIREMENTS:
     A preliminary ESCP must be submitted to the local government for approval
     during the planning phase for any development that obtains a total point score of
     17 or greater or when any trigger value is scored or exceeded.




IECA (Australasia)                           November 2008                          Page 7