Whsmp · OPW16/0021

                       -    Oxidation of ASS                         5   Complete Environmental EWMS for Acid sulphate Soils and           State Planning            Subcontractor
     Acid Sulphate
☐     Soils
                            results in acidic
                            releases to the on-
                                                                         Implement Acid Sulphate Soil Management Plan                         Policy (SP2/02)
                                                                                                                                              Guideline for
                            site stormwater and                                                                                               Planning and
                            canal                                                                                                             Managing
                       -    Discharge water from                                                                                              Development
                            dewatering treatment                                                                                              Involving Acid
                            plant does not meet                                                                                               Sulphate Soils
                            guideline parameters
                       -    pH of the
                            groundwater
                            decreases by more
                            than 0.3 of a unit
                            below the established
                            baseline values
                       -    Dissolved Fe and Al in
                            the groundwater
                            increases by more
                            than 110% of the
                            established baseline
                            values
                       -    Inadequate lime,
                            guard layer applied
                            under temporary
                            stockpiles on-sit
                       -    Inadequate
                            treatment of ASS
                            material off-site
                       -    Negative impact on
                            surrounding
                            environment.
                       -    Cost of remediation.
                                                     D   4    14     5   Excavation plant (e.g. excavators, backhoes, etc.) will not be        WH&S Act        C3    Site Manager
    Excavation         Collapse of trench
☒   and Trenching
                                                                         operated by persons who do not have the appropriate
                                                                                                                                          
                                                                                                                                                2011 Part 2
                                                                                                                                                WH&S Reg        H13
                       Persons falling                                  authority.
                                                                                                                                                2011 Part 6
                                                                     1   Unsafe excavations will not be entered at any time by any              Div. 3                Site Manager
                       Objects falling
                                                                         person to perform work or otherwise.                                  Excavation
                       Confined spaces                              4   Materials will not be placed, stacked or moved near the edge           Work COP
                                                                                                                                                                      Subcontractor/ HSO
                                                                         of the excavation in such a way as to cause a collapse of the          2013
                       Contact with                                     work or endanger a person below.                                      Vic OHS Reg
                        underground                                                                                                             2007 Part
                                                                     3   Any excavations 1m deep or more are barricaded (barricades             3.6                   Subcontractor/ HSO
                        services
                                                                         at least 900mm high) to exclude entry or protect unattended           Vic OHS Reg
                       Undermining other                                excavations.                                                           2007
                                                                                                                                                Chapter 5 –
                        structures                                   3   Excavation areas will be barricaded as required.                                             Subcontractor/ HSO
                                                                                                                                                Div. 4 Part
                       Build-up of exhaust                          4   For trenches >1.5m deep where access is via ladders, ladders           5.1.26 – 27
                                                                                                                                                                      Subcontractor/ HSO
                                                                         are:                                                                  Managing
                        fumes etc.                                                                                                              the risk of
                                                                         - placed at 9m intervals in the part of the trench where a             plant in the
                                                                              person will be;
                                                             WHS Management Plan – Appendix 1 – Project Risk Assessment
                                                                                                                                                                                      Page 30