Whsmp · OPW16/0021

                                                                                   SWMS:07 – Excavation & Trenching
Safe Work Methods
                                                                                                                                                         Responsible
                                                                               H                         Controls / Work Methods                                           Residual Risk
                                                                                                                                                         Person/s for
          Job Steps                   Potential Hazards       L    C    R      O                  1. Eliminate 2. Substitute 3. Isolate 4. Engineer
                                                                                                                   5. Admin 6. PPE
                                                                                                                                                          Monitor &
                                                                               C                                                                                           L    C    R
                                                                                                                                                            Review
Working in a trench greater      Excavation collapse          C    4    E      5      No person is to work in an excavation alone.                     Workers           D     4    H
than 1.5m deep                                                         18             The excavation is to have appropriate controls in place to                                    14
                                                                                       protect persons from being exposed to a collapse of the          Geo-Technical
                                                                                       excavation. These controls are to include one of or a            Engineer
                                                                                       combination of the controls outlined below:
                                                                                         a)   Shoring all sides of the trench by shields or another
                                                                                              way and where shoring is used, it is to be designed by
                                                                               4
                                                                                              an engineer and installed by trained personnel, and
                                                                                              installed while no personnel are in the trench;
                                                                                         b) Benching all sides of the trench such that each bench
                                                                                            cut into the side of the trench is no higher than it is
                                                                                            wide and the angle of each batter is not more than 45
                                                                               4            degrees unless a geo-technical engineer approves;
                                                                                         c)   Battering all sides of the trench;
                                                                                         d) Having a geotechnical engineer approve in writing all
                                                                                            sides if the trench as safe from collapse, and state in
                                                                                            writing, conditions of approval / certification, how long
                                                                               4            the approval lasts if there is no stated natural
                                                                               4            occurrence that could affect adversely the stability of
                                                                                            the trench and state in writing the natural occurrences
                                                                                            that could affect adversely the stability of the trench.




584 Milton Road TOOWONG QLD 4066                          SWMS Developed by:       Jamie Gilbert                                                            VERSION 8 – September 2015
P: (07) 3335 5000 F: (07) 3335 5005                       Position:                National HSE Coordinator                                                                    Page 55
ABN: 52 009 778 330