2018-08-13 General Committee Agenda

GENERAL COMMITTEE MEETING AGENDA                                                 13 AUGUST 2018


Accordingly, it is recommended that condition 30 be amended. Condition 30 currently reads:
30.   Any person acting on this permit must prevent erosion and sediment export from leaving
      the site. Site control measures such as silt fencing, controlled gravel access to the site and
      controlled disposal of waste, will be necessary.
      In this regard plans detailing the methods of controlling erosion and sediment are required
      to be submitted to the Council for approval prior to obtaining a Development Permit for
      Operational Works.
It is recommended that the condition be amended to read as follows:
30.   Any waters discharging from the construction areas of the site to below the AEP 1%
      contour must achieve less than 50mg/L Total Suspended Solids (TSS) and pH suitable for
      the needs of the receiving wetland during all rain events.
      The application for operational works must include a detailed Erosion and Sediment control
      plan prepared by a Certified Professional in Erosion and Sediment Control, in accordance
      with the International Erosion Control Association Best Practice Book Series, including
      a.   The Erosion and Sediment Control Plan must include for staging of construction to
           minimise the area of exposed soils at all times to an area whereby the contractor can
           practically cover all exposed soils with materials that will prevent the movement of
           soil (i.e. to a c-factor of 0.5) prior to any forecast rain event nominated and/or
           observed as likely to cause runoff from the site, regardless of whether those exposed
           areas flow to a sediment basin.
      b.   A sufficient supply of materials nominated as the contingency to cover exposed soils
           must be on site at all times, along with appropriate machinery and personnel for their
           deployment.
      c.   The Erosion and Sediment Control Plan shall also include a High Efficiency flow
           through sediment basin sized and operated to treat 90% of the flows and to act as
           final polishing and contingency to achieve 50mgTSS/L where cover of exposed soils
           fails. The flow through sediment basin must remain operational from commencement
           of construction until the site is stabilised for operational purposes, regardless of the
           area of exposed soil.
      d.   Chemicals used for dosing of the flow through sediment basin must be proven to not
           become bioavailable or harm the ecology within the receiving wetland.
It is also recommended that an additional condition be included that specifically addresses
wetland and Swamp Crayfish habitat protection. The inclusion of a new condition will result in the
renumbering of conditions. It is recommended that the condition be worded as follows:
31.   The wetland habitat below the Q100 line (1% AEP) must be protected from any risk of
      water balance changes or chemical changes associated with construction activities and the
      conduct of the approved use. A detailed Wetland and Swamp Crayfish Habitat Protection
      Management Plan must be submitted with any operational works application to
      demonstrate the wetland habitat will be protected from construction activities and the
      conduct of the approved use. The Wetland and Swamp Crayfish Habitat
      Protection Management Plan must demonstrate:
      a.   The water quality necessary for ongoing protection of the wetland;
      b.   How the Erosion and Sediment Controls for the site will prevent release of any
           constructed generated sediments and chemicals to the wetland; and
      c.   The ecological and biological requirements of the Swamp Crayfish and how these will
           be protected during construction and operation of the development.




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