24965 version 1
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Demonstrate knowledge of water treatment fluoridation processes
Level
3
Credits
2
Purpose
People credited with this unit standard are able to: describe the purpose and
processes of fluoridation as used in water treatment; and the storage,
handling, and preparation of chemicals, and chemical dosing systems used
in fluoridation processes.
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.
Replacement information
This unit standard replaced unit standard 17899.
Accreditation
Evaluation of documentation by NZQA and industry.
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
Legislation relevant to this unit standard includes but is not limited to the Health and
Safety in Employment Act 1992, and the Hazardous Substances and New
Organisms (HSNO) Act 1996.
Drinking-Water Standards for New Zealand, Ministry of Health, Wellington, 2000 and
2005.
2
A person is required to have approved handler certification if handling substances
being transferred under the HSNO Act 1996. Information on approved handler
procedures can be obtained from http://www.erma.govt.nz.
 New Zealand Qualifications Authority 2016
24965 version 1
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Elements and performance criteria
Element 1
Describe the purpose of fluoridation as used in water treatment.
Performance criteria
1.1
Fluoride levels are defined in accordance with the Drinking-Water Standards for
New Zealand.
1.2
Fluoridation of public water supplies is described in terms of the impacts on
health.
Range
dental health, other fluoride sources, natural fluoride, overdose
health risks.
Element 2
Describe fluoridation processes as used in water treatment.
Performance criteria
2.1
The chemical sources of fluoride used in water treatment are described in terms
of cost effectiveness and operator safety.
Range
2.2
Fluoride addition methods used in water treatment are identified and described
in terms of powder and liquid chemical sources.
Range
2.3
sodium silico fluoride, hydrofluosilicic acid.
dry powder feeders, carry water, liquid dosing and flow control.
Chemical addition of fluoride is described in terms of existing natural fluoride
levels, monitoring methods, dosing control methods, and impacts of dosage
fluctuation.
Range
flow measurement, calibration, daily average dose of fluoride
calculation, check tests, reporting of tests.
Element 3
Describe the storage, handling, and preparation of chemicals, and chemical dosing
systems used in fluoridation processes.
Performance criteria
3.1
The storage, handling, and preparation of chemicals used in fluoridation
processes are described in terms of the Health and Safety in Employment Act
1992, and the HSNO Act 1996 and regulations.
 New Zealand Qualifications Authority 2016
24965 version 1
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3.2
Chemical dosing systems used in fluoridation processes are described in terms
of the components, methods, and points of application.
Range
components – chemical pipework, dosing pumps, speed control,
stroke control, flow rate, tank of dilutant, instrumentation for
automatic control.
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