Unit of competency Outline
Date retreived
23/07/2026 1:00 AM AWST
23/07/2026 1:00 AM 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.
Perform infiltration and odour investigations
Perform infiltration and odour investigations
Unit of competency
National Code
NWP338B
NWP338B
State Code
D1916
D1916
TGA Status
Replaced
Replaced
DTWD Status
Replaced
Replaced
State Implementation and Classification
Approved Date
14/01/2009
Field of Education
030907 - Water And Sanitary Engineering
Original Release Date
14/01/2009
Nominal Hours
30
Description
This unit of competency describes the outcomes required to investigate and report on odour and infiltration problems in the wastewater collection and transfer systems. The ability to investigate and resolve wastewater system problems, operate technical equipment and prepare technical reports are essential to performance.
Notes
Elements and Performance Criteria
1Plan and prepare for investigation.
- 1.1 Inspect and select tools and equipment according to organisational and statutory requirements.
- 1.2 Schedule regular inspections according to organisational procedures.
- 1.3 Correctly select, fit and use required safety equipment, including personal protective equipment.
2Investigate and correct odour problems.
- 2.1 Collect and record wastewater samples according to organisational procedures.
- 2.2 Investigate and report odour sources in the wastewater collection and transfer system according to organisational requirements.
- 2.3 Integrate processes to improve system performance and correct odour problems according to organisational requirements.
3Investigate and address infiltration problems.
- 3.1 Manage flow regulations and determine and undertake diversions and/or isolation of the site to facilitate investigation processes.
- 3.2 Identify address and report illegal inflows or discharges of the wastewater collection and transfer flows according to organisational and statutory requirements.
4Compile reports and records.
- 4.1 Review and action investigation results according to organisational and statutory requirements.
- 4.2 Compile reports from wastewater collection and transfer flow data to meet organisational and statutory 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, 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.
Tools and equipment may include:
electronic monitoring and metering systems
gas detection equipment
sampling and testing equipment
infiltration dye testing equipment
smoke testing equipment
closed circuit television
manual chart recording systems
on- and off-road vehicles
communication equipment
marine craft
breathing apparatus
atmosphere monitoring equipment
rescue equipment
appropriate personal protective equipment
computerised equipment
Organisational and statutory requirements may include:
by-laws and organisational policies
standard operating procedures
environment protection
equal employment opportunity
occupational health and safety
plumbing and drainage standards
Water Acts
electrical and mechanical procedures
hazardous substances and dangerous goods
World Health Organisation and National Health and Medical Research Council (NHMRC) guidelines
Inspections may require:
investigation of:
trade waste admission
on-site pre-treatment systems
air scrubbers
grease traps
separators and arresters
illegal connections
infiltration sources
interaction and communication with other employees, plumbing and drainage consultants, other authorities and the general public
visual and electronic inspections
condition monitoring of assets
implementation of reporting procedures that may also include:
procedures for the implementation of by-laws
organisational policies
standard operating procedures
statutory requirements
Flow regulations may require:
the adjustment of:
pumping systems
valving systems
electronic and manual control systems
gravity systems
Tools and equipment may include:
electronic monitoring and metering systems
gas detection equipment
sampling and testing equipment
infiltration dye testing equipment
smoke testing equipment
closed circuit television
manual chart recording systems
on- and off-road vehicles
communication equipment
marine craft
breathing apparatus
atmosphere monitoring equipment
rescue equipment
appropriate personal protective equipment
computerised equipment
Organisational and statutory requirements may include:
by-laws and organisational policies
standard operating procedures
environment protection
equal employment opportunity
occupational health and safety
plumbing and drainage standards
Water Acts
electrical and mechanical procedures
hazardous substances and dangerous goods
World Health Organisation and National Health and Medical Research Council (NHMRC) guidelines
Inspections may require:
investigation of:
trade waste admission
on-site pre-treatment systems
air scrubbers
grease traps
separators and arresters
illegal connections
infiltration sources
interaction and communication with other employees, plumbing and drainage consultants, other authorities and the general public
visual and electronic inspections
condition monitoring of assets
implementation of reporting procedures that may also include:
procedures for the implementation of by-laws
organisational policies
standard operating procedures
statutory requirements
Flow regulations may require:
the adjustment of:
pumping systems
valving systems
electronic and manual control systems
gravity systems
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 investigate, and report on odour and infiltration problems in the wastewater collection and transfer systems including:
inspecting and selecting tools and equipment
scheduling inspections
collecting and recording wastewater samples
investigating and reporting odour sources
integrating processes
managing flow regulations, diversions and isolation of the site
identifying, addressing and reporting illegal inflows or discharges
reviewing and addressing investigation results
completing required 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.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
The candidate should demonstrate the ability to investigate, and report on odour and infiltration problems in the wastewater collection and transfer systems including:
inspecting and selecting tools and equipment
scheduling inspections
collecting and recording wastewater samples
investigating and reporting odour sources
integrating processes
managing flow regulations, diversions and isolation of the site
identifying, addressing and reporting illegal inflows or discharges
reviewing and addressing investigation results
completing required 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.
Replaces
| State Code | National Code | Title | Type |
|---|---|---|---|
| M1920 | NWP338A | Perform odour and infiltration investigations | Unit of competency |
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| AVY77 | NWPNET014 | Perform odour and infiltration investigations | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| D245 | NWP30107 | Certificate III in Water Operations | Qualification |