RFI - Ecological Assessment Report

EMP – CONSTRUCTION PHASE                                                                                      4-14

       Strategy:              To ensure that erosion and sedimentation is adequately controlled during the
                              construction phase.

              •      Stormwater is treated as close as possible to the source (as opposed to at the lower areas of
                     the catchment);
              •      Clean stormwater is to be diverted around construction areas of the site including any waste
                     or chemical storage areas, stockpiles and toilets;
              •      All surface runoff shall be directed through temporary control measures to minimise
                     potential for sediment transport off-site;
              •      Any sediment control measures are to avoid significant trees and retained vegetation;
              •      Any catch drains flows are directed through temporary control measures and toward
                     sedimentation ponds;
              •      Any catch drains will be protected from scour by check dams or similar devices aimed at
                     reducing water velocities;
              •      Installation of controls on the upstream and downstream side of any stockpiles or fill
                     embankments;
              •      Removal and appropriate disposal of deposited material, litter and gross pollutants;
              •      Inspections of erosion and deposition is to be conducted on a weekly basis and following
                     storm events that have the potential to cause erosion i.e. normally events with a rainfall
                     intensity greater than 25mm/hr or daily events with totals greater than 50mm.
              •      Erosion and sediment control measures will be implemented in areas prior to
                     commencement of any construction activities. This includes:
                        a. Designating areas for machinery and construction material storage (as required) away
                           from drainage paths;
                        b. Such storage areas are to be suitably bunded and lined to prevent seepage of
                           contaminants into the sand substrate (see C.15);
              •      Education of site personnel through the Induction/Environmental Awareness training;
              •      Construction of sedimentation detention areas as required;
              •      Installation of vehicle washdown facility at site access points to minimise potential for
                     transport of sediment off site; and
              •      No sediment and erosion control devices and water quality control measures are to be
                     located within habitat protection areas (refer approved E&SC drawing provided by
                     Superintendent).
              •      The use of mulch for erosion control is described in the Landscape Master Plan including
                     the use of Hoop Pine bark for slopes greater than 1:3.

        Performance Requirement:
              •      To ensure measures taken to reduce risk of erosion are in accordance with best practice
                     guidelines (I E Aust 1996), minimise the generation of sediments and prevent off-site
                     transport of sediments during construction.


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