19347 version 2
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Level 6
Credits 10
Purpose People credited with this unit standard are able to: optimise and manage abstraction and pre-treatment processes for water sources of potable water; and identify critical points and hazards, and identify and manage preventive and corrective actions, in raw water abstraction processes.
Subfield Water Industry
Domain
Status
Status date
Date version published
Water Treatment
Registered
19 September 2008
19 September 2008
Planned review date
Entry information
31 December 2013
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 Definitions
Water quality
– the suitability of water for use as drinking-water, with or without water treatment.
Critical points – points in a process or in equipment where failure to function correctly can lead to a public health hazard.
Optimise – adjusting plant input variables to make the process as effective as possible in order to achieve the desired output, taking into account the constraints of cost, human input, water quality, and water demand.
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.
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New Zealand Qualifications Authority 2020

19347 version 2
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O rganisational 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.
2 References
Legislation relevant to this unit standard includes but is not limited to the Health Act
1956, and Resource Management Act 1991.
Drinking-Water Standards for New Zealand , Ministry of Health, Wellington, 2000 and
2005.
3 Hazards do not include occupational hazards.
Element 1
Optimise and manage abstraction and pre-treatment processes for water sources of potable water.
Performance criteria
1.1 Design features of hardware for water abstractions are optimised in terms of their function.
Range river intake types, weirs, pumps in dry wells, pumps in wet wells, mechanical and fixed screens, infiltration galleries, rough filtration, intake towers, groundwater bores, bore pumps, spillways, raw water pipelines, spring heads, fish passes; evidence is required for at least three.
1.2 Pre-treatment processes are optimised and managed in terms of their purpose in relation to raw water quality, and the effects they may have on water quality.
Range may include but is not limited to – raw water quality variations, pathogens, pollutants, suspended matter, turbidity, algae taste and odour, aeration, iron and manganese, dissolved gases, consent limit, flow control; evidence is required for at least four.
1.3 Effects of variations in water quality from surface water sources are managed in terms of operational factors, and physical, chemical, and microbiological parameters.
Range operational factors may include but are not limited to – flow control, water quality monitoring, consent limits, natural organic matter reduction, carbon dioxide shifts, organic colour, turbidity reduction, faecal contamination reduction; evidence is required for at least four.
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New Zealand Qualifications Authority 2020

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Element 2
Identify critical points and hazards, and identify and manage preventive and corrective actions, in raw water abstraction processes.
Performance criteria
2.1 The critical points of processes and management points are identified in accordance with organisational procedures.
2.2 The hazards at each critical point are identified in terms of the causes of the events leading to their appearance, and the risk factors.
2.3 The preventive and corrective actions for events related to each hazard are identified and managed.
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.
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New Zealand Qualifications Authority 2020