Unit of competency details

NWP308B - Test and commission wastewater collection systems (Release 2)


ReleaseStatusRelease date
2 (this release)Current 30/Apr/2012
(View details for release 1) Replaced10/Jan/2011

Usage recommendation:
Is superseded by and equivalent to NWPNET045 - Test and commission wastewater collection systemsUnit code updated. Content and formatting updated to comply with the new standards. All PC transitioned from passive to active voice. One new PC added to Element 4. PC 4.1 & 4.2 merged. 06/Dec/2015

Training packages that include this unit


SchemeCodeClassification value
ASCED Module/Unit of Competency Field of Education Identifier 030717 Plant And Machine Operations  

Classification history

SchemeCodeClassification valueStart dateEnd date
ASCED Module/Unit of Competency Field of Education Identifier 030717 Plant And Machine Operations  25/Sep/2008 
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Modification History

NWP308B Release 2: Layout adjusted. No changes to content.

NWP308B Release 1: Primary release.

Unit Descriptor

This unit of competency describes the outcomes required to plan and implement the testing and commissioning of wastewater collection systems. The ability to interpret technical information, identify and assess hazards and perform technical testing procedures are essential to performance.

Application of the Unit

This unit supports the attainment of skills and knowledge required for field staff and operators with specific responsibility for commissioning wastewater collection systems, post-installation or repair, ensuring that the functioning of the system complies with relevant specifications and organisational requirements.

Licensing/Regulatory Information

Not applicable.


Not applicable.

Employability Skills Information

This unit contains employability skills.

Elements and Performance Criteria Pre-Content

Elements describe the essential outcomes of a unit of competency.

Performance criteria describe the required performance needed to demonstrate achievement of the element. Where bold italicised  text is used, further information is detailed in the range statement. Assessment of performance is to be consistent with the evidence guide.

Elements and Performance Criteria



1 Plan and prepare for testing and commissioning .

1.1 Identify and interpret the system operation requirements  correctly.

1.2 Confirm testing and commissioning tasks from relevant documentation  and scheduled appropriately.

1.3 Identify and assess potential hazards  and take required preventative measures.

1.4 Select and use tools and equipment  correctly.

1.5 Check testing equipment for accuracy and correct malfunctions.

2 Conduct pipeline and access structure testing procedures .

2.1 Select and install tensioning and measuring equipment correctly.

2.2 Select and fit gauges of the correct range to test equipment.

2.3 Carry out testing procedures  according to organisational and statutory requirements .

2.4 Locate failed pipes, joints and fittings accurately and reschedule reporting and testing.

2.5 Accurately locate and report failed maintenance holes, inspection shafts, maintenance shafts or other access structures and rescheduled testing.

3 Commission the wastewater collection system .

3.1 Ensure the system is operational according to specifications and organisational procedures.

3.2 Restore the work site to meet environmental and organisational requirements.

3.3 Check, maintain and store equipment tools and materials according to manufacturer guidelines and organisational procedures.

4 Review , record and report results .

4.1 Maintain workplace records according to organisational and statutory requirements.

4.2 Maintain calibration records and certificates in accordance with organisational and statutory requirements

Required Skills and Knowledge

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

Required Skills 

  • communicates effectively and appropriately with colleagues and contractors
  • communicates the implementation of OHS policies and procedures
  • interprets and applies a range of technical documents including relevant:
  • regulatory, legislative, licensing and organisational requirements
  • codes and standards
  • specifications
  • organisational policies
  • conducts test procedures
  • identifies system faults
  • uses test equipment
  • monitors work processes and ensures safe work practices
  • identifies reports and records hazards and risks
  • uses personal protective equipment
  • participates in ensuring compliance with standards, regulations and policies
  • maintains and checks records and documents

Required knowledge :

  • general occupational health and safety on work sites
  • the risk factors and potential hazards of test procedures
  • characteristics of pipes, materials and fittings
  • an overview of wastewater system and water industry operations
  • layout and construction of wastewater collection systems
  • testing procedures for wastewater systems
  • relevant definitions, terminology, symbols and language

Evidence Guide

The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for the Training Package.

Critical aspects for assessment and evidence required to demonstrate competency in this unit 

The candidate should demonstrate the ability to plan and implement the testing and commissioning of wastewater collection systems including:

  • interpreting the testing requirements of the system from relevant plans and documentation
  • preparing and checking testing equipment
  • assessing risks and hazards and taking appropriate preventive measures
  • using testing equipment correctly
  • applying testing procedures accurately
  • identifying and reporting faulty system components
  • making the system operational and conducting post-commissioning checks
  • restoring the worksite
  • completing relevant documentation

Context of and specific resources for assessment 

Access to the workplace and resources including:

  • documentation that should normally be available in a water industry organisation
  • relevant codes, standards, and government regulations

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.

Assessment processes and techniques must be culturally appropriate, and appropriate to the language and literacy capacity of the candidate and the work being performed.

Validity and sufficiency of evidence requires that:

  • competency will need to be demonstrated over a period of time reflecting the scope of the role and the practical requirements of the workplace
  • where the assessment is part of a structured learning experience the evidence collected must relate to a number of performances assessed at different points in time and separated by further learning and practice
  • a decision of competence only taken at the point when the assessor has complete confidence in the person's competence over time and in various contexts
  • all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence
  • where assessment is for the purpose of recognition (RCC/RPL), the evidence provided will need to be authenticated and show that it represents competency demonstrated over a period of time
  • assessment can be through simulated project-based activity and must include evidence relating to each of the elements in this unit

In all cases where practical assessment is used it will be combined with targeted questioning to assess the underpinning knowledge. Questioning will be undertaken in a manner appropriate to the skill levels of the operator, any cultural issues that may affect responses to the questions, and reflecting the requirements of the competency and the work being performed.

Range Statement

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. Add any essential operating conditions that may be present with training and assessment depending on the work situation, needs if the candidate, accessibility of the item, and local industry and regional contexts.

System operation requirements  may include:

  • calibration certificates
  • NATA certifications

Relevant documentation  may include:

  • manufacturer's specifications
  • organisational procedures

Potential hazards  may include:

  • work in confined spaces
  • work involving lifting and moving materials
  • working in a trench
  • health hazards associated with working in wastewater collections systems

Tools and equipment  may include:

  • hand and power tools
  • lifting and winching equipment
  • testing equipment
  • communication equipment
  • line plugs
  • gauges
  • personal protective equipment

Testing procedures  may include:

  • hydrostatic test
  • vacuum test
  • low pressure air test

Organisational and statutory requirements  may include:

  • by-laws
  • organisational policies
  • standard operating procedures
  • environmental protection
  • occupational health and safety guidelines for:
  • lifts and cranes
  • mines
  • road signage code
  • electrical
  • dangerous goods

Unit Sector(s)

Not applicable.

Competency field

Collection and distribution.

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