This unit supports the attainment of skills and knowledge required for competent workplace performance in councils of all sizes. Knowledge of the legislation and regulations within which councils must operate is essential. The unique nature of councils, as a tier of government directed by elected members and reflecting the needs of local communities, must be appropriately reflected.

Prerequisite Unit/s

ELEMENT

PERFORMANCE CRITERIA

1. Establish site for sewerage collection system maintenance or construction

1.1. Work is planned and programmed to be undertaken in accordance with drawings, specifications and other documentation.

1.2. 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.

1.3. Work is assigned to appropriate accredited personnel or gangs to meet sewerage collection job requirements.

1.4. 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.

1.5. Underground and overhead obstructions and other utility services are located.

2. Carry out sewerage collection maintenance

2.1. Condition of the sewerage collection system is monitored, tested, sampled and reported on.

2.2. Sewerage collection problems and the source of odours and gases identified by tests are responded to.

2.3. Problems associated with sewerage manholes and chambers are inspected and rectified.

2.4. Correct sewerage collection service and condition are located and identified.

2.5. Defective components of pipeline are repaired, replaced or serviced as required.

2.6. Functional pressure/non-pressure tests of items are carried out.

2.7. Sewerage collection pipes and equipment are cleaned.

2.8. Service is reinstated after maintenance work has been passed at final inspection.

3. Excavate trenches and manholes

3.1. 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.

3.2. Environmental protection devices are installed as required to meet environmental regulations.

3.3. Levels and lines of works and location of manholes are set up according to the drawings.

3.4. Excavation plant is selected according to requirements.

3.5. Dewatering equipment is installed.

3.6. 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.

3.7. Pressure or other tests are completed as specified.

3.8. Trenches are backfilled with selected materials , compacted in layers and the surface is finished according to specifications and levels shown on the plans.

4. Carry out construction of sewerage collection service

4.1. Trench bottom is prepared and pipe bedding is laid to specifications in accordance with the drawings.

4.2. Pipes are placed and valves, fittings and flow control devices are fitted in accordance with the drawings and specifications.

4.3. Functional tests of mains and components are carried out.

4.4. Sewerage collection system is placed in service and the performance of the sewerage collection system is monitored.

4.5. Manholes, inspection and valve chambers, minor structures and thrust blocks are constructed.

5. Complete necessary documentation

5.1. Construction and maintenance reports are completed and filed to meet council's requirements.

5.2. The as constructed plans and drawings are completed in accordance with completed work.

Hidden text

This describes the essential skills and knowledge and their level, required for this unit

Required Skills

reading and interpreting plans and specifications, and plant and equipment capabilities

measuring and calculating quantities

measurement and methods of setting out

trade-specific skills.

Required Knowledge

OHS requirements

construction and maintenance practices related to sewerage collection systems

pipe materials and components technology

work scheduling, inspection, testing and monitoring

work site traffic management

monitoring and testing methods and procedures

state and local environmental requirements.

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Overview of assessment requirements

A person who demonstrates competency in this unit will be able to perform the outcomes described in the Elements to the required performance level detailed in the Performance Criteria. The knowledge and skill requirements described in the Range Statement must also be demonstrated. For example, knowledge of the legislative framework and safe work practices that underpin the performance of the unit must be demonstrated.

Critical aspects of evidence to be considered

Appropriate materials, pipes and components, construction methods and processes are used for the efficient maintenance and construction of sewerage collection systems.

Plans and specification are adhered to.

Safety on work sites is ensured.

Australian standards, codes of practice and advisory standards are met.

Context of assessment

May be assessed:

on the job

simulated workplace environment

written assignment

short-answer test

oral questioning

observation

or any combination of the above.

Relationship to other units(prerequisite or co-requisite units)

To enable holistic assessment this unit may be assessed with other units that form part of the job role.

Method of assessment

The following assessment methods are suggested:

observation of the learner performing a range of workplace tasks over sufficient time to demonstrate handling of a range of contingencies

written and/or oral questioning to assess knowledge and understanding

completion of workplace documentation

third-party reports from experienced practitioners

completion of self-paced learning materials including personal reflection and feedback from trainer, coach or supervisor.

Evidence required for demonstration of consistent performance

Evidence will need to be gathered over time across a range of variables.

Resource implications

In accordance with a range of variable requirements.

The Range Statement relates to the Unit of Competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording in the Performance Criteria is detailed below.

Types of pipes may include:

lined steel pipes

cast and ductile iron pipes

reinforced and unreinforced concrete pipes

polyvinyl chloride (PVC) pipes

fibre reinforced concrete (FRC) pipes

vitrified clay pipes

fibre glass reinforced pipes

butadiene styrene pipes.

Types of pipe joints may include:

cast iron: flanged, flexible, sleeve, bell and spigot joints

steel: butt and spigot and socket welded joints, and flanged joints

Viking Johnson coupling and victaulic coupling

PVC: insert fitting, flared compression rubber gasket and solvent welded joints

FRC: gibault, machined and rubber joints

concrete pipes: socket mortar, socket mastic and socket rubber ring

vitrified clay: bell and socket

butadiene styrene: solvent cement welded to bell and spigot joints.

Types of valves, meters and components may include:

stop valves

non-return valves

flow control valves

air release valves

waste and leak detection meters.

Pipe protection may include:

non-metallic coatings

metallic coatings

chemical grouting treatments

cathodic

crinite.

Pipe repair and linings may include:

cement or epoxy mortars

inversion lining

slip lining

spiral liners

pipe bursting.

Cleaning methods may include:

power and hand-operated rods

sewer balls and tyres

high velocity cleaners

kites and bags

flushing

scrapers

scooters

bucket machines

chemical control.

Pipe inspection and tests may include:

water and air pressure tests

leakage

infiltration tests

visual

smoke test

dye test

television monitor

gas detection.

Pipe line odours and gases may include:

hydrogen sulphide

aeration

chlorinating

rodent and insect control

confined spaces.

Plant and equipment may include:

excavators

backhoes

trench excavators

trench compactors

trucks

loaders

cranes.

Materials may include:

concrete

steel

clay

sand

rock

crushed rock

geofabric cloth

plastics.

Trench support systems may include:

timber struts

wales and runners

steel trench sheets

box shields

poling boards

tucking frames.

Structures may include:

manholes

valve chambers

inspection chambers

thrust blocks

pump chambers

pipe supports.

Relevant standards may include:

appropriate Australian standards related to the maintenance or construction of sewerage collection systems.

Documents may include:

permits

approvals

plans

receipts

schedules

analysis sheets

cost sheets

time sheets

test reports

inspection reports.

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Unit Sector

Operational Works

Hidden text

This unit contains employability skills.