Decision Notice - OPW22 0319 [As Published] · OPW22/0319

               30.    Construction of all internal stormwater drainage works must comply with the relevant
                      section/s of Australian Standard AS/NZS 3500.3.
               31. All stormwater quality treatment devices must be routinely checked, serviced and cleaned in
                      accordance with the manufacturer’s recommendations. Records of all maintenance activities
                      undertaken must be kept and made available to Council upon request.
                      Erosion and Sediment Control
               32.    Prescribed Water Contaminants (as defined in Schedule 10 of Environmental Protection
                      Regulation 2019) must not be released from the site or to waters within the site, or be likely
                      to be released should rainfall occur, unless all reasonable and practicable measures are
                      taken to prevent or minimise the release and concentration of contamination.
               33.    Sediment and erosion control measures must be in place prior to works commencing. If such
                      measures are not in place or are not satisfactory, “on the spot” fines may be issued. Such
                      fines can be issued if sediments from the site are found to enter or have the potential to enter
                      Council’s stormwater system, natural waterways, any downstream stormwater filtration
                      system or adversely impacting on other properties. The sediment and erosion control design
                      and measures have NOT been approved, it is the site's Supervising Engineer who is
                      responsible for ensuring that the sediment and erosion control measures have:
                      a.      Been duly designed by an RPEQ or CPESC and constructed in accordance with "best
                              practise" methods,
                      b.      Been revised by an RPEQ or CPESC to address the issues raised by changes in the
                              projected construction schedule and/or methods,
                      c.      Been revised to address predicted rainfall events, and
                      d.      Achieve the desired environmental outcomes.
                      Council may request further controls to be installed should the implemented measures be
                      found inefficient.
               34.    The erosion and sediment control measures must be designed, installed and maintained in
                      accordance with the supervising engineer instructions and the current best practice
                      standards * (Refer to Advisory Note).
               35.    The developer must ensure sediment does not leave the site or enter onto adjoining
                      properties or Council’s drainage system due to surface runoff or on tyres of vehicles and/or
                      machinery. It is essential to implement appropriate approved erosion and sediment control
                      measures throughout the site during all phases of construction including vehicle shakedown
                      pad/grid (or similar) at the access to the construction site. Where sediments or other
                      contaminants are deposited on a road, they must be removed so as not to enter Council’s
                      drainage system or waterways.
               36.    Prior to the completion of the development and commencement of use, all site surfaces must
                      be effectively stabilised using methods which have achieved effective short-term stabilisation
                      and which will continue to achieve effective stabilisation in the medium to long-term. For the
                      purpose of this condition, an effectively stabilised surface is defined as one that does not, or
                      is not likely to result in visible evidence of soil loss caused by sheet, rill or gully erosion or
                      lead to sedimentation, or lead to water contamination.
               37. Minimise on-site erosion and the release of sediment or sediment laden stormwater from the
                      site at all times by implementing industry best practice for erosion and sediment control as
                      per the International Erosion Control Association, Best Practice Erosion and Sediment
                      Control documents (2008 or later version). Including but not limited to:
                      37.1. Drainage control measures must be implemented and maintained to minimise water
                         flow across areas of exposed earth;
                      37.2. Sediment and erosion control measures must be implemented and maintained to
                         prevent soil loss from earth disturbance areas and prevent deposition beyond earth
                         disturbance areas; and


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Document Set ID: 22388440
Version: 2, Version Date: 28/04/2023


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Document Set ID: 22388440

Construction of all internal stormwater drainage works must comply with the relevant
section/s of Australian Standard AS/NZS 3500.3.

All stormwater quality treatment devices must be routinely checked, serviced and cleaned in
accordance with the manufacturer’s recommendations. Records of all maintenance activities
undertaken must be kept and made available to Council upon request.

Erosion and Sediment Control

Prescribed Water Contaminants (as defined in Schedule 10 of Environmental Protection
Regulation 2019) must not be released from the site or to waters within the site, or be likely
to be released should rainfall occur, unless all reasonable and practicable measures are
taken to prevent or minimise the release and concentration of contamination.

Sediment and erosion control measures must be in place prior to works commencing. If such
measures are not in place or are not satisfactory, “on the spot” fines may be issued. Such
fines can be issued if sediments from the site are found to enter or have the potential to enter
Council’s stormwater system, natural waterways, any downstream stormwater filtration
system or adversely impacting on other properties. The sediment and erosion control design
and measures have NOT been approved, it is the site's Supervising Engineer who is
responsible for ensuring that the sediment and erosion control measures have:

a. Been duly designed by an RPEQ or CPESC and constructed in accordance with "best
practise" methods,

b. Been revised by an RPEQ or CPESC to address the issues raised by changes in the
projected construction schedule and/or methods,

Cc. Been revised to address predicted rainfall events, and
d. Achieve the desired environmental outcomes.

Council may request further controls to be installed should the implemented measures be
found inefficient.

The erosion and sediment control measures must be designed, installed and maintained in
accordance with the supervising engineer instructions and the current best practice
standards * (Refer to Advisory Note).

The developer must ensure sediment does not leave the site or enter onto adjoining
properties or Council’s drainage system due to surface runoff or on tyres of vehicles and/or
machinery. It is essential to implement appropriate approved erosion and sediment control
measures throughout the site during all phases of construction including vehicle shakedown
pad/grid (or similar) at the access to the construction site. Where sediments or other
contaminants are deposited on a road, they must be removed so as not to enter Council's
drainage system or waterways.

Prior to the completion of the development and commencement of use, all site surfaces must
be effectively stabilised using methods which have achieved effective short-term stabilisation
and which will continue to achieve effective stabilisation in the medium to long-term. For the
purpose of this condition, an effectively stabilised surface is defined as one that does not, or
is not likely to result in visible evidence of soil loss caused by sheet, rill or gully erosion or
lead to sedimentation, or lead to water contamination.

Minimise on-site erosion and the release of sediment or sediment laden stormwater from the
site at all times by implementing industry best practice for erosion and sediment control as
per the /nternational Erosion Control Association, Best Practice Erosion and Sediment
Control documents (2008 or later version). Including but not limited to:

37.1. Drainage control measures must be implemented and maintained to minimise water
flow across areas of exposed earth;

37.2. Sediment and erosion control measures must be implemented and maintained to
prevent soil loss from earth disturbance areas and prevent deposition beyond earth
disturbance areas; and

Page 6 of 12

Version: 2, Version Date: 28/04/2023