Unit of competency details

NWP273A - Monitor, operate and report ultraviolet irradiation disinfection systems (Release 2)


Usage recommendation:
Is superseded by and equivalent to NWPTRT053 - Operate and control UV processesUnit code updated. Content and formatting updated to comply with the new standards. All PC transitioned from passive to active voice. Unit title changed to better reflect unit outcomes. Element 4 all PC revised. PC 2.4 renumbered. Assessment Requirements created drawing upon specified assessment information from superseded unit. 06/Dec/2015

Release Status:
ReleaseRelease date
2 (this release) 30/Apr/2012
(View details for release 1) 10/Jan/2011

Training packages that include this unit


SchemeCodeClassification value
ASCED Module/Unit of Competency Field of Education Identifier 030907 Water And Sanitary Engineering  

Classification history

SchemeCodeClassification valueStart dateEnd date
ASCED Module/Unit of Competency Field of Education Identifier 030907 Water And Sanitary Engineering  25/Sep/2008 
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Modification History

NWP273A Release 2: Layout adjusted. No changes to content.

NWP273A Release 1: Primary release.

Unit Descriptor

This unit of competency describes the outcomes required to monitor and operate ultraviolet (UV) irradiation disinfection systems and to report on microbiological quality control.

Application of the Unit

This unit supports the attainment of skills and knowledge required for operational staff with specific responsibility for ensuring that UV irradiation disinfection systems comply with 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 work .

1.1 Determine work requirements according to legislative and organisational requirements .

1.2 Select and check equipment and tools  required to meet safety requirements of task and site.

1.3 Select, fit and use personal protective equipment.

2 Monitor system performance .

2.1 Monitor UV irradiation disinfection systems  according to agreed schedule and procedures.

2.2 Collect process samples and conduct standard microbiological tests  as required.

2.3 Maintain and monitor relevant OHS requirements.

2.4 Collect and report process data according to organisational and disinfection system requirements.

3 Maintain and operate UV irradiation disinfection system .

3.1 Carry out routine inspections of system components  according to organisational requirements.

3.2 Clean and replace system components as required.

3.3 Operate UV lamp sequencing according to organisational requirements.

4 Complete documentation .

4.1 Produce information relating to UV irradiation disinfection system maintenance and operation, according to organisational requirements.

4.2 Review information and contribute to enterprise processes for continuous improvement and incident management.

Required Skills and Knowledge

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

Required skills :

  • identify and respond to operational problems
  • produce reports and logs
  • use safety equipment
  • use UV-absorbent personal protective equipment
  • safe use of cleaning chemicals
  • follow plans, charts and instructions
  • apply policies, standard operating procedures and regulatory standards
  • communicate effectively
  • work effectively as part of a team
  • use communication equipment
  • give and receive instructions
  • perform work-related calculations
  • operate computerised equipment
  • identify control system faults
  • identify hazards
  • perform microbiological sampling
  • use literacy skills in regard to verbal and written communication in the workplace
  • interpret material safety data sheets (MSDS)

Required knowledge :

  • properties of UV irradiation
  • microbiological water quality guidelines
  • UV irradiation disinfection system layout, including components
  • lock-out procedures for mechanical and electrical installations
  • policies, standard operating procedures and legislation
  • communication systems
  • safe use of cleaning chemicals and prevention of associated hazards
  • risk factors and potential hazards associated with UV irradiation systems
  • UV irradiation generation equipment operation, capacity and limitations
  • effects of weather and conditions on operation of site or plant
  • MSDS

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 monitor, operate and report on UV irradiation disinfection systems by:

  • scheduling work
  • selecting and using appropriate tools and equipment, including personal protective equipment
  • monitoring UV irradiation disinfection systems
  • collecting process samples and performing standard tests
  • maintaining and operating UV irradiation disinfection systems
  • collecting and reporting process data
  • producing reports

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 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 should only be made 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 and cultural issues that may affect responses to the questions, and will reflect 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 of the candidate, accessibility of the item, and local industry and regional contexts.

Legislative and organisational requirements  may include:

  • relevant federal and state or territory legislation and regulations
  • codes of practice, associated standards and guidance material
  • documented organisational policies, manuals and induction programs
  • relevant community planning and development agreements, such as land care agreements

Equipment and tools  may include:

  • electronic monitoring and metering systems
  • recording systems
  • basic hand and power tools
  • sampling and laboratory testing equipment
  • computerised equipment
  • personal protective equipment, such as:
  • UV-absorbent face shields
  • UV-absorbent safety goggles
  • UV-absorbent protective clothing

UV irradiation disinfection systems  may include:

  • low pressure mercury lamps
  • medium pressure mercury lamps

Tests  may include:

  • UV absorbance
  • turbidity
  • suspended solids
  • iron
  • lamp intensity
  • hardness

UV irradiation system components  may include:

  • power supply
  • ballast
  • lamps
  • sleeves
  • racks

Unit Sector(s)

Not applicable.

Competency field