24975 version 1
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Describe drinking-water consumption, and water loss and methods of
leak detection in drinking-water supply
Level
5
Credits
5
Purpose
People credited with this unit standard are able to describe: the management
of, and the impact of factors that affect daily and seasonal variations to,
drinking-water consumption; the methods for evaluation of water loss, and
the factors that determine economic cost of remediation; and methods of leak
detection.
Subfield
Water Industry
Domain
Water Treatment
Status
Registered
Status date
19 September 2008
Date version published
19 September 2008
Planned review date
31 December 2013
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA, industry
and teaching professional in the same field from another
provider.
Standard setting body (SSB)
Primary Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0179
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Reference
Guidelines for Drinking-Water Quality Management for New Zealand, Ministry of
Health, Wellington, 2000.
2
Definition
Drinking-water supply – the supply catchment, treatment plant, and distribution. The
drinking-water supplier has responsibility for managing the public health risks of the
drinking-water supply.
 New Zealand Qualifications Authority 2016
24975 version 1
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Elements and performance criteria
Element 1
Describe the management of, and the impact of factors that affect daily and seasonal
variations to, drinking-water consumption.
Performance criteria
1.1
The consumption of domestic drinking-water is described in terms of the
methods for the management of drinking-water supply.
Range
1.2
The consumption of domestic drinking-water is described in terms of the timing
of, and need for, implementation of management methods.
Range
1.3
metering, restrictions, tariffs, bylaw control, public education,
pressure management, water saving devices, water auditing, onsite storage, water re-use.
metering, restrictions, tariffs, bylaw control, public education,
pressure management, water saving devices, water auditing, onsite storage, water re-use.
Water consumption is described in terms of the impact of factors which affect
daily and seasonal variations.
Range
includes but is not limited to – changes to industrial production,
population changes in holiday destinations, irrigation.
Element 2
Describe the methods for evaluation of water loss, and the factors that determine
economic cost of remediation.
Performance criteria
2.1
Water loss in drinking-water supply is described in terms of the methods for
evaluation.
Range
2.2
evidence is required for at least two methods.
Water loss in drinking-water supply is described in terms of the factors that
determine economic cost of remediation.
Range
production, resource consent, capital replacement, prosecution.
 New Zealand Qualifications Authority 2016
24975 version 1
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Element 3
Describe methods of leak detection.
Range
planned methods – monitoring minimum night flows, monitoring levels in
reservoirs, step testing, leak correlators, ground radar, sampling for fluoride;
reactive methods – listening devices, visual inspection; public – enquiry,
feedback, complaint.
Performance criteria
3.1
Methods of leak detection are described in terms of the procedures for their use
or application.
3.2
Methods of leak detection are described in terms of their suitability for specified
situations.
3.3
Methods of leak detection are described in terms of their limitations.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Primary Industry Training Organisation standards@primaryito.ac.nz if
you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016