Unit of competency Outline
Date retreived
22/07/2026 2:38 PM AWST
22/07/2026 2:38 PM AWST
Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.
Install sub-soil drainage
Install sub-soil drainage
Unit of competency
National Code
RIICRC203A
RIICRC203A
State Code
WB431
WB431
TGA Status
Replaced
Replaced
DTWD Status
Replaced
Replaced
State Implementation and Classification
Approved Date
20/01/2010
Field of Education
040327 - Plumbing
Original Release Date
20/01/2010
Nominal Hours
16
Description
This unit covers the installation of sub-soil drainage in the civil construction industry. It includes planning and preparing, setting out and excavating trenches, installing bedding materials, installing sub-soil drainage, and cleaning up. Licensing, legislative, regulatory and certification requirements that apply to this unit can vary between states, territories, and industry sectors. Relevant information must be sourced prior to application of the unit.
Notes
Elements and Performance Criteria
1. Plan and prepare
- 1.1. Access, interpret and apply compliance documentation relevant to the work activity
- 1.2. Identify and apply relevant drawings and job specifications to all work activities
- 1.3. Obtain and confirm safety requirements from the site safety plan and organisational policies and procedures, and apply to the allotted task
- 1.4. Identify, obtain and implement signage requirements from the project traffic management plan
- 1.5. Select plant, tools and equipment to carry out tasks consistent with the requirements of the job, check for serviceability and rectify or report any faults
- 1.6. Identify environmental protection requirements from the project environmental management plan, and confirm and apply to the allotted task
2. Set out and excavate trenches
- 2.1. Check trench depths and grades to ensure conformity with plans and specifications
- 2.2. Set out and clearly mark trench location
- 2.3. Communicate with plant operator to ensure correct excavation of trenches, placement of shoring and battering
3. Install bedding materials
- 3.1. Determine bedding material type and depth from plans and specifications
- 3.2. Lay bedding materials to specified depths and grades
4. Install sub-soil drainage
- 4.1. Place geo-textile according to specifications
- 4.2. Prepare drain sections and fittings
- 4.3. Lay subsoil drain
- 4.4. Provide inspection opening and flush out points according to plans
- 4.5. Fit out and/or connect end structures/outlets/clean outs to culverts, storm water or subsoil drain systems
- 4.6. Install packing and prepare system for backfilling
- 4.7. Monitor backfill procedure to ensure work completed to specification
5. Clean up
- 5.1. Clear work area and recycle or dispose of materials in accordance with project environmental management plan
- 5.2. Clean, check, maintain and store plant, tools and equipment
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, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Relevant compliance documentation may include:
legislative, organisational and site requirements and procedures
manufacturer's guidelines and specifications
Australian standards
Employment and workplace relations legislation
Equal Employment Opportunity and Disability Discrimination legislation
Safety requirements may include:
OHS requirements in accordance with state or territory legislation and regulations, organisational safety policies and procedures, and project safety plan, including protective clothing and equipment, use of tools and equipment, workplace environment and safety, handling of materials, use of fire fighting equipment, use of First Aid equipment, hazard control and hazardous materials and substances
safe operating procedures including recognising and preventing hazards associated with high voltage power lines, uneven/unstable terrain, trees, overhead service lines, bridges, surrounding buildings, obstructions, structures, facilities, dangerous materials, recently filled trenches, other machines, personnel, traffic control, working at heights, working in proximity to others, worksite visitors and the public
safe parking practices including ensuring access ways are clear, equipment/machinery is away from overhangs and refuelling sites, safe distances are kept from excavations, and areas secured from unauthorised access or movement
recognising hazards and risks including uneven/unstable terrain, trees, fires, overhead and underground services, bridges, buildings, excavations, traffic, embankments, cuttings, structures and hazardous materials
emergency procedures related to equipment operation including emergency shutdown and stopping, extinguishing equipment fires, organisational First Aid requirements and evacuation
Tools and equipment may include:
levelling equipment
tape measures
shovels
hand saws
cutting knives
crow bars
hammers
trowels
formwork
Environmental requirements may include:
organisational/project environmental management plan
waste management
water quality protection
noise
vibration
dust
clean-up management
Bedding materials may include:
aggregate
sand
Subsoil drainage systems may include:
strip filter drains and perforated pipes with or without geo-textile fabric
granular materials enclosed in geo-textile fabric
Materials may include:
marking materials
strip filter drains
perforated pipes
geo-textile fabric
pipe jointing materials
backfill and bedding materials
marker post
concrete
stones
Relevant compliance documentation may include:
legislative, organisational and site requirements and procedures
manufacturer's guidelines and specifications
Australian standards
Employment and workplace relations legislation
Equal Employment Opportunity and Disability Discrimination legislation
Safety requirements may include:
OHS requirements in accordance with state or territory legislation and regulations, organisational safety policies and procedures, and project safety plan, including protective clothing and equipment, use of tools and equipment, workplace environment and safety, handling of materials, use of fire fighting equipment, use of First Aid equipment, hazard control and hazardous materials and substances
safe operating procedures including recognising and preventing hazards associated with high voltage power lines, uneven/unstable terrain, trees, overhead service lines, bridges, surrounding buildings, obstructions, structures, facilities, dangerous materials, recently filled trenches, other machines, personnel, traffic control, working at heights, working in proximity to others, worksite visitors and the public
safe parking practices including ensuring access ways are clear, equipment/machinery is away from overhangs and refuelling sites, safe distances are kept from excavations, and areas secured from unauthorised access or movement
recognising hazards and risks including uneven/unstable terrain, trees, fires, overhead and underground services, bridges, buildings, excavations, traffic, embankments, cuttings, structures and hazardous materials
emergency procedures related to equipment operation including emergency shutdown and stopping, extinguishing equipment fires, organisational First Aid requirements and evacuation
Tools and equipment may include:
levelling equipment
tape measures
shovels
hand saws
cutting knives
crow bars
hammers
trowels
formwork
Environmental requirements may include:
organisational/project environmental management plan
waste management
water quality protection
noise
vibration
dust
clean-up management
Bedding materials may include:
aggregate
sand
Subsoil drainage systems may include:
strip filter drains and perforated pipes with or without geo-textile fabric
granular materials enclosed in geo-textile fabric
Materials may include:
marking materials
strip filter drains
perforated pipes
geo-textile fabric
pipe jointing materials
backfill and bedding materials
marker post
concrete
stones
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment
Critical aspects for assessment and evidence required to demonstrate competency in this unit
The evidence required to demonstrate competency in this unit must be relevant to worksite operations and satisfy all of the requirements of the performance criteria, required skills and knowledge and the range statement of this unit and include evidence of the following:
knowledge of the requirements, procedures and instructions for sub-soil drainage installations
implementation of requirements, procedures and techniques for the safe, effective and efficient completion of sub-soil drainage installation
working with others to undertake and complete the installation of sub-soil drainage in a way that meets all of the required outcomes
consistent timely completion of sub-soil drainage installation that safely, effectively and efficiently meets the required outcomes
installation of a minimum of 100 metres of sub-soil drain in two separate locations, including end structures or outlets to design specifications
Context of and specific resources for assessment
This unit must be assessed in the context of the work environment. Where personal safety or environmental damage are limiting factors, assessment may occur in a simulated environment provided it is realistic and sufficiently rigorous to cover all aspects of workplace performance, including task skills, task management skills, contingency management skills and job role environment skills.
Assessment of this competency requires typical resources normally used in a resources and infrastructure sector environment. Selection and use of resources for particular worksites may differ due to the site circumstances.
The assessment environment should not disadvantage the participant. For example, language, literacy and numeracy demands of assessment should not be greater than those required on the job.
Customisation of assessment and delivery environment to sensitively accommodate cultural diversity.
Aboriginal people and other people from a non English speaking background may have second language issues.
Where applicable, physical resources should include equipment modified for people with disabilities. Access must be provided to appropriate learning and/or assessment support when required.
Method of assessment
This unit may be assessed in a holistic way with other units of competency. The assessment strategy for this unit must verify required knowledge and skill and practical application using more than one of the following assessment methods:
written and/or oral assessment of the candidate's required knowledge
observed, documented and/or first hand testimonial evidence of the candidate's:
implementation of appropriate requirement, procedures and techniques for the safe, effective and efficient achievement of required outcomes
consistent achievement of required outcomes
first hand testimonial evidence of the candidate's:
working with others to undertake and complete the installation of sub-soil drainage
Guidance information for assessment
Consult the SkillsDMC User Guide for further information on assessment including access and equity issues.
Overview of assessment
Critical aspects for assessment and evidence required to demonstrate competency in this unit
The evidence required to demonstrate competency in this unit must be relevant to worksite operations and satisfy all of the requirements of the performance criteria, required skills and knowledge and the range statement of this unit and include evidence of the following:
knowledge of the requirements, procedures and instructions for sub-soil drainage installations
implementation of requirements, procedures and techniques for the safe, effective and efficient completion of sub-soil drainage installation
working with others to undertake and complete the installation of sub-soil drainage in a way that meets all of the required outcomes
consistent timely completion of sub-soil drainage installation that safely, effectively and efficiently meets the required outcomes
installation of a minimum of 100 metres of sub-soil drain in two separate locations, including end structures or outlets to design specifications
Context of and specific resources for assessment
This unit must be assessed in the context of the work environment. Where personal safety or environmental damage are limiting factors, assessment may occur in a simulated environment provided it is realistic and sufficiently rigorous to cover all aspects of workplace performance, including task skills, task management skills, contingency management skills and job role environment skills.
Assessment of this competency requires typical resources normally used in a resources and infrastructure sector environment. Selection and use of resources for particular worksites may differ due to the site circumstances.
The assessment environment should not disadvantage the participant. For example, language, literacy and numeracy demands of assessment should not be greater than those required on the job.
Customisation of assessment and delivery environment to sensitively accommodate cultural diversity.
Aboriginal people and other people from a non English speaking background may have second language issues.
Where applicable, physical resources should include equipment modified for people with disabilities. Access must be provided to appropriate learning and/or assessment support when required.
Method of assessment
This unit may be assessed in a holistic way with other units of competency. The assessment strategy for this unit must verify required knowledge and skill and practical application using more than one of the following assessment methods:
written and/or oral assessment of the candidate's required knowledge
observed, documented and/or first hand testimonial evidence of the candidate's:
implementation of appropriate requirement, procedures and techniques for the safe, effective and efficient achievement of required outcomes
consistent achievement of required outcomes
first hand testimonial evidence of the candidate's:
working with others to undertake and complete the installation of sub-soil drainage
Guidance information for assessment
Consult the SkillsDMC User Guide for further information on assessment including access and equity issues.
Replaces
| State Code | National Code | Title | Type |
|---|---|---|---|
| W2100 | BCCRC2003B | Install sub-soil drainage | Unit of competency |
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| WH110 | RIICRC203D | Install sub-soil drainage | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| W677 | RII31309 | Certificate III in Pipe Laying | Qualification |
| W678 | RII31409 | Certificate III in Road Construction and Maintenance | Qualification |
| W680 | RII31609 | Certificate III in Trenchless Technology | Qualification |
| W681 | RII31709 | Certificate III in Tunnel Construction | Qualification |