18456 version 3
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Describe preventive maintenance and monitoring of product standards
for drinking-water treatment
Level
5
Credits
3
Purpose
People credited with this unit standard are able to: describe preventive
maintenance systems relevant to drinking-water and wastewater treatment in
New Zealand; describe the use of standards and compliance conditions
relevant to drinking-water treatment in New Zealand; and identify critical
points, hazards, preventive actions, and corrective actions within processes
requiring maintenance.
Subfield
Water Industry
Domain
Drinking-Water
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
References
Drinking-Water Standards for New Zealand, Ministry of Health, Wellington, 2000 and
2005.
Guidelines for Drinking-water Quality Management for New Zealand, Ministry of
Health, Wellington, 2005 (draft).
 New Zealand Qualifications Authority 2016
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2
Definitions
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.
Critical points – points in a process or in equipment where failure to function correctly
can lead to a public health hazard.
Organisational procedures – instructions to staff, and procedures which are
documented in memo or manual format and are available in the workplace. These
requirements include but are not limited to – site specific requirements,
manufacturers’ specifications, product quality specifications, and legislative or
regulatory requirements.
Wastewater includes stormwater and sewage systems.
Elements and performance criteria
Element 1
Describe preventive maintenance systems relevant to drinking-water and wastewater
treatment in New Zealand.
Performance criteria
1.1
Systems are described in terms of those used to programme and record
maintenance procedures, work completed, and record asset information.
Range
computerised, manual.
1.2
Systems are described in terms of their links to maintenance manuals and other
records and drawings.
1.3
Information retained from inspection and field tests is assessed in terms of
quality, accuracy, timeliness, and organisational procedures.
1.4
Unplanned and planned maintenance work is described in terms of
organisational procedures and requirements.
1.5
Systems procedures to monitor or control run time are identified and described
in terms of plant item duties.
Range
1.6
may include but is not limited to – hour meters, duty versus
standby, record keeping, asset lives;
evidence is required for at least three.
System procedures to monitor mechanical conditions are identified and
described in terms of preventive maintenance.
Range
may include but is not limited to – audio and visual checks,
frequency analysis, performance checks, power drawn, record
keeping, temperature.
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Element 2
Describe the use of standards and compliance conditions relevant to drinking-water
treatment in New Zealand.
Performance criteria
2.1
Product quality assurance is described in terms of product standards and
resource consents and conditions for abstraction.
Range
2.2
standards include but are not limited to – Drinking-water standards
for New Zealand 2000 and 2005, chemical standards (New
Zealand Waste Water Association – NZWWA), product standards
(AS/NZS).
The need for independent checks is described in terms of product quality
assurance.
Range
procedural manuals, records.
Element 3
Identify critical points, hazards, preventive actions, and corrective actions within processes
requiring maintenance.
Performance criteria
3.1
The critical points in processes requiring maintenance are identified in
accordance with organisational procedures.
3.2
The hazards at each critical point are identified in terms of the causes of the
events leading to their appearance, and the risk factors.
3.3
The preventive and corrective actions for events related to each hazard are
identified.
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.
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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