Unit of competency details

NWP274A - Monitor, operate and report ozone treatment 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Is superseded by and equivalent to NWPTRT056 - Operate and control ozone processesUnit code updated.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. PC 2.4 renumbered, PC 4.2 revised. Assessment Requirements created drawing upon specified assessment information from superseded unit. 06/Dec/2015

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

NWP274A Release 2: Layout adjusted. No changes to content.

NWP274A Release 1: Primary release.

Unit Descriptor

This unit of competency describes the outcomes required to monitor and operate ozone treatment systems and to report on process 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 ozone treatment 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 ozone treatment systems  according to agreed schedule and procedures.

2.2 Collect process samples and conduct standard tests .

2.3 Maintain and monitor relevant OHS requirements.

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

3 Prepare and apply ozone dosing .

3.1 Generate and dose ozone according to system specifications and organisational requirements.

3.2 Maintain information related to ozone generation and dosing according to organisational requirements.

4 Complete and review reports .

4.1 Produce information relating to 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 and personal protective equipment
  • follow plans, charts and instructions
  • apply policies, regulatory standards and standard operating procedures
  • communicate effectively
  • work effectively as part of a team
  • use communication equipment
  • give and receive instructions
  • perform work-related ozone calculations
  • prepare and apply ozone dosing
  • operate computerised equipment
  • identify control system faults
  • identify hazards
  • perform microbiological and ozone residual sampling
  • use literacy skills in regard to verbal and written communication in the workplace
  • interpret material safety data sheets (MSDS)

Required knowledge :

  • properties and chemistry of ozone
  • pH
  • microbiological water quality guidelines
  • ozone system layout
  • lock-out procedures for mechanical and electrical installations
  • policies, standard operating procedures and legislation
  • communication systems
  • hazardous substances handling
  • risk factors and potential hazards associated with ozonation
  • work-related ozone calculations
  • ozone dosing processes
  • operation, capacity and limitations of ozone generation equipment
  • effects of weather and conditions on operation of site or plant
  • pumping and valving systems
  • automatic feed rate control systems
  • 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 ozone treatment systems including:

  • scheduling work
  • selecting and using appropriate tools and equipment, including personal protective equipment
  • monitoring ozone treatment systems
  • collecting process samples and performing standard tests
  • collecting and reporting process data
  • preparing and applying ozone dosing safely
  • 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
  • on- and off-road vehicles
  • communication equipment
  • personal protective equipment

Ozone treatment systems  may include:

  • electric discharge ozone-generation system
  • UV ozone-generation system

Tests  may include:

  • ozone residuals
  • exhaust gas ozone concentration
  • pH

Unit Sector(s)

Not applicable.

Competency field


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