Attachment 3 - Construction Management Plan

                                                       Westcon Site Management Pty Ltd



4.3       Storm water & Wastewater Management

4.3.1 Storm Water

          The primary sources of storm water contamination are from sediment run-off and chemical
          spills. Storm water controls to be implemented by the subcontracted excavator include:

           • Limiting clearing to that necessary for construction activities to be undertaken;
           • Ensuring that water from disturbed areas is filtered or directed towards a sediment trap;
           • Diverting clean water away from disturbed areas;
           • Carrying out re-vegetation of disturbed areas;
           • Maintaining the natural drainage regime to the maximum practicable extent;
           • Installing sediment traps down slope of disturbed catchments;
           • Restricting mobile equipment and vehicles to defined road ways;
           • Installing silt fences, check dams, decantation basins, silt curtain and other erosion
             protection devices where appropriate;
           • Regular cleaning/de-silting of sediment traps and silt fences to maintain design capacity,
             when required;
           • Reviewing storm water management requirements prior to any new site works; and


4.3.2      Management measures for other pollution control structures will include;

           • Bunding and/or securing of fuel, oil, grease, and other chemical storage facilities to
             prevent accidental spillage polluting runoff;
           • Designing and constructing compounds or bunded areas with holding capacities to
             conform to the appropriate regulatory requirement applicable to each material type;
           • Providing facilities for machinery and truck wheel wash down, and installing interceptor
             traps to remove oils and greases from wash down facility runoff;
           • Directing water free of visible oil to a sediment trap for recycling; and
           • Regular inspection of off-site roadways to ensure that silt and soil is not being tracked
             beyond the boundaries, and if it is, then appropriate measures are implemented to clean
             up any spilt or tracked soil promptly.
           • Wastewater


4.3.3 Waste Water

          For construction activities, wastewater is generated through washout of concrete and pump
          trucks. A designated area (bunded excavation) must be set aside for washing out of pump
          truck wastes. Concrete trucks are required to remove their concrete waste and residues
          back to the depot.

          Sewerage must be treated either through connection directly to a council sewage system or
          through dedicated septic tanks on-site or chemical toilets, which is to be pumped out on a
          regular basis, as required.



Issue 2              July 1                                                            Page 10