NZQA Expiring unit standard
17603 version 6
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Title
Demonstrate knowledge of properties of raw water and its uses in
energy and chemical plant
Level
2
Credits
6
Purpose
People credited with this unit standard are able to demonstrate
knowledge of: raw water chemistry; physical actions on raw
water; and raw water types and uses, water standards, and
potable water, in energy and chemical plant.
Classification
Energy and Chemical Plant > Operation of Energy and
Chemical Plant
Available grade
Achieved
Explanatory notes
1
Definition
Plant refers to the plant or unit at which the person is employed.
2
Performance of the elements of this unit standard must comply with the following
enactments and standards: Health and Safety in Employment Act 1992; Resource
Management Act 1991; Hazardous Substances and New Organisms Act 1996;
AS/NZS 4020:2005 Testing of products for use in contact with drinking water; Health
(Drinking Water) Amendment Bill 2006; and Drinking-Water Standards for New
Zealand, 2005, Ministry of Health.
3
The Environmental Risk Management Authority (ERMA) is responsible for assessing
and approving hazardous substances and, where appropriate, setting controls on the
way the substance is used. Any questions relating to the provisions for hazardous
substances should be directed to ERMA New Zealand, telephone 04 916 2426; or
EXITO, telephone 03 964 4710.
This unit standard is
expiring
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of raw water chemistry in energy and chemical plant.
Evidence requirements
1.1
Terminology used in chemistry is explained in relation to raw water chemistry.
Range
atoms, elements, molecules, compounds, mixtures, valence, ions.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
17603 version 6
Page 2 of 4
1.2
Symbols and formulae used in relation to raw water chemistry are identified.
1.3
The phases of water are explained in terms of their physical properties.
Range
1.4
solid, liquid, vapour.
pH is explained in terms of the ions present in the raw water.
Outcome 2
Demonstrate knowledge of physical actions on raw water in energy and chemical plant.
Evidence requirements
2.1
The water cycle is explained in terms of the physical process.
Range
evaporation, precipitation, surface flowing, underground flowing.
2.2
The results of evaporation of water are explained in terms of its effect on the
quality of the evaporated water.
2.3
Effects of precipitation are explained in terms of identifying the potential
contaminants that may be entrained by the water.
Range
2.4
Effects of surface flow are explained in terms of identifying the potential
contaminants that may be entrained by the water.
Range
2.5
dissolved gases, dissolved solids.
dissolved solids, suspended solids, dissolved gases, chemical
pollutants.
This unit standard is
Range
dissolved solids,
suspended solids, dissolved gases, chemical
expiring
pollutants.
Effects of underground flow are explained in terms of identifying the potential
contaminants that may be entrained by the water.
Outcome 3
Demonstrate knowledge of raw water types and uses, water standards, and potable water
in energy and chemical plant.
Evidence requirements
3.1
Types of treated water are explained in terms of their uses.
Range
3.2
potable, fire, industrial processes, horticultural.
Sources of raw water are identified and their potential contaminants are
identified.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
Range
3.3
AS/NZS 4020:2005, Drinking-Water Standards for New Zealand
2005, legislation.
Contaminants in potable water are identified.
Range
3.5
sources include but are not limited to – surface water, ground
water, sea water;
contaminants include but are not limited to – dissolved solids,
suspended solids, dissolved gases, chemical pollutants.
Standards for potable water in New Zealand are explained in terms of health
requirements.
Range
3.4
17603 version 6
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contaminants include but are not limited to – dissolved solids,
metals, bacteria, viruses.
The effects of contaminants on the quality of potable water and its uses are
explained in basic terms.
Range
effects include but are not limited to – hardness, taste, odour,
discolouration;
uses include but are not limited to – cooking, washing.
3.6
Sources of organic matter in potable water are identified and its effects on the
quality of water are explained in basic terms.
3.7
Causes of high and low pH in potable water are identified and their effects on
water quality are explained in basic terms.
3.8
Causes of turbidity in potable water are identified and its effect on water quality
is explained in basic terms.
3.9
Sources of metals in potable water are identified and their effects on water
quality are explained in basic terms.
This unit standard is
Range
metals include
but are not limited to – calcium, magnesium, iron,
expiring
aluminium, arsenic, cadmium, chromium, fluoride, lead, mercury.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
17603 version 6
Page 4 of 4
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
25 November 2000
31 December 2014
Revision
2
24 July 2002
31 December 2014
Review
3
27 June 2005
31 December 2014
Rollover and
Revision
4
25 July 2006
Review
5
22 May 2009
31 December 2016
Review
6
24 October 2014
31 December 2016
31 December 2014
Consent and Moderation Requirements (CMR) reference
0079
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR 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.
This unit standard is
expiring
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016