Minor Change Existing Approval OPW12 0095 03 · OPW12/0095.03

                         Excavation and Filling
               14.       All earthworks shall be undertaken in accordance with the provisions of AS 3798
                         “Guidelines on Earthworks for Commercial and Residential Developments”, with
                         geotechnical testing undertaken in accordance with Section 8 of the standard and to a
                         minimum of Level 1 as defined in Appendix B. Test results as required by AS 3798 and a
                         certificate of quality and uniformity of fill shall be provided by a RPEQ and submitted to
                         Council prior to the commencement of the use
               15.       Where the development involves excavation or filling over, or is adjacent to, water supply
                         or sewerage infrastructure, all access chamber levels must be adjusted to provide a
                         freeboard of 100 above the finished ground surface level.
               HYDRAULICS & WATER QUALITY
                         Erosion and Sediment Control
               16.       Prescribed Water Contaminants (as defined in the Environmental Protection Act 1994)
                         must not be released from 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. These measures must include as a minimum, but are not
                         limited to, the following:
                         (a)      Ensure non essential exposure of soil is prevented by: restricting the extent of
                                  clearing to that necessary for access to, and safe construction of, the approved
                                  works; protecting vegetation in all other areas of the site; and by minimising the
                                  duration of soil exposure by:
                                        I. staging the works to minimise the area of soil exposed at any one time;
                                       II. effectively stabilising cleared areas prior to rainfall if works are delayed or
                                           works are not intended to occur immediately. See E&SC Advice Note 1;
                                       III. effectively stabilising areas at finished level without delay; and
                                       IV. effectively stabilising steep areas, such as stockpiles, batters and
                                           embankments, which are not being actively worked and prior to rainfall.
                         (b)      Where it is not feasible to effectively stabilise cleared areas of exposed soil, such
                                  as areas being actively worked, implement a full suite of erosion and sediment
                                  controls to minimise erosion and maximise sediment capture in those areas; and
                         (c)      In areas of exposed soil where it is not feasible to either effectively stabilise the
                                  surface or implement a full suite of erosion and sediment controls, for example in
                                  the areas being actively worked and where the implementation of some erosion and
                                  sediment controls would impede construction activities, ensure contingency
                                  measures are available on site and are implemented, prior to rain, to minimise
                                  erosion and maximise sediment capture.
                         (d)      Effectively stabilise all stockpiles, batters and embankments without delay. Where
                                  it is not feasible to effectively stabilise a stockpile, batter or embankment, such as
                                  areas being actively worked, ensure that sediment controls are installed and surface
                                  stormwater flows are managed such that erosion of stockpiles, batters or
                                  embankments is not caused by concentrated stormwater flows.
                         (e)      For all works or other disturbances undertaken within waterways (including riparian
                                  areas) ensure:
                                        I. prior written approval from the relevant consent authority exists, and
                                       II. Work within waterways must only be: undertaken during dry weather; be
                                           promptly rehabilitated conforming to the natural channel form, substrates and
                                           riparian vegetation as far as possible; and be undertaken in accordance with
                                           Best Practice Erosion and Sediment Control, Appendix I – Instream works,
                                           Sections 14 and 16, International Erosion Control Association (2008)



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Document Set ID: 23113824
Version: 2, Version Date: 17/07/2024


[OCR of page images]
Excavation and Filling

14. All earthworks shall be undertaken in accordance with the provisions of AS 3798
“Guidelines on Earthworks for Commercial and Residential Developments”, with
geotechnical testing undertaken in accordance with Section 8 of the standard and to a
minimum of Level 1 as defined in Appendix B. Test results as required by AS 3798 and a
certificate of quality and uniformity of fill shall be provided by a RPEQ and submitted to
Council prior to the commencement of the use

15. Where the development involves excavation or filling over, or is adjacent to, water supply
or sewerage infrastructure, all access chamber levels must be adjusted to provide a
freeboard of 100 above the finished ground surface level.

HYDRAULICS & WATER QUALITY
Erosion and Sediment Control

16. Prescribed Water Contaminants (as defined in the Environmental Protection Act 1994)
must not be released from 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. These measures must include as a minimum, but are not
limited to, the following:

(a) Ensure non essential exposure of soil is prevented by: restricting the extent of
clearing to that necessary for access to, and safe construction of, the approved
works; protecting vegetation in all other areas of the site; and by minimising the
duration of soil exposure by:

|. staging the works to minimise the area of soil exposed at any one time;

ll. effectively stabilising cleared areas prior to rainfall if works are delayed or
works are not intended to occur immediately. See E&SC Advice Note 1;

Ill. effectively stabilising areas at finished level without delay; and

IV. effectively stabilising steep areas, such as_ stockpiles, batters and
embankments, which are not being actively worked and prior to rainfall.

(b) Where it is not feasible to effectively stabilise cleared areas of exposed soil, such
as areas being actively worked, implement a full suite of erosion and sediment
controls to minimise erosion and maximise sediment capture in those areas; and

(c) In areas of exposed soil where it is not feasible to either effectively stabilise the
surface or implement a full suite of erosion and sediment controls, for example in
the areas being actively worked and where the implementation of some erosion and
sediment controls would impede construction activities, ensure contingency
measures are available on site and are implemented, prior to rain, to minimise
erosion and maximise sediment capture.

(d) Effectively stabilise all stockpiles, batters and embankments without delay. Where
it is not feasible to effectively stabilise a stockpile, batter or embankment, such as
areas being actively worked, ensure that sediment controls are installed and surface
stormwater flows are managed such that erosion of stockpiles, batters or
embankments is not caused by concentrated stormwater flows.

(e) For all works or other disturbances undertaken within waterways (including riparian
areas) ensure:

|. prior written approval from the relevant consent authority exists, and

Il. Work within waterways must only be: undertaken during dry weather; be
promptly rehabilitated conforming to the natural channel form, substrates and
riparian vegetation as far as possible; and be undertaken in accordance with
Best Practice Erosion and Sediment Control, Appendix | — Instream works,
Sections 14 and 16, International Erosion Control Association (2008)

Page 4 of 11
Document Set ID: 23113824

Version: 2, Version Date: 17/07/2024