Elements and Performance Criteria
- Establish site for sewerage collection system maintenance or construction
- Work is planned and programmed to be undertaken in accordance with drawings, specifications and other documentation.
- Work site is prepared and maintained in safe condition and in accordance with the occupational health and safety (OHS) requirements and regulations of other relevant authorities.
- Work is assigned to appropriate accredited personnel or gangs to meet sewerage collection job requirements.
- Traffic control is planned at the work site and signed in accordance with the regulations of various authorities and the Australian standards Manual of Traffic Control Devices.
- Underground and overhead obstructions and other utility services are located.
- Carry out sewerage collection maintenance
- Condition of the sewerage collection system is monitored, tested, sampled and reported on.
- Sewerage collection problems and the source of odours and gases identified by tests are responded to.
- Problems associated with sewerage manholes and chambers are inspected and rectified.
- Correct sewerage collection service and condition are located and identified.
- Defective components of pipeline are repaired, replaced or serviced as required.
- Functional pressure/non-pressure tests of items are carried out.
- Sewerage collection pipes and equipment are cleaned.
- Service is reinstated after maintenance work has been passed at final inspection.
- Excavate trenches and manholes
- Appropriate drainage is provided for the diversion of all uncontaminated water from the site and silt traps are set up as required to prevent damage to the environment.
- Environmental protection devices are installed as required to meet environmental regulations.
- Levels and lines of works and location of manholes are set up according to the drawings.
- Excavation plant is selected according to requirements.
- Dewatering equipment is installed.
- Trenches are excavated to the depth and grade shown on the plans, and shoring or shields are installed or trenches are battered back according to OHS requirements.
- Pressure or other tests are completed as specified.
- Trenches are backfilled with selected materials , compacted in layers and the surface is finished according to specifications and levels shown on the plans.
- Carry out construction of sewerage collection service
- Trench bottom is prepared and pipe bedding is laid to specifications in accordance with the drawings.
- Pipes are placed and valves, fittings and flow control devices are fitted in accordance with the drawings and specifications.
- Functional tests of mains and components are carried out.
- Sewerage collection system is placed in service and the performance of the sewerage collection system is monitored.
- Manholes, inspection and valve chambers, minor structures and thrust blocks are constructed.
- Complete necessary documentation