NZQA Expiring unit standard
19328 version 5
Page 1 of 3
Title
Explain land-based wastewater treatment systems used in the dairy
industry
Level
3
Credits
8
Purpose
People credited with this unit standard are able to explain: soil
requirements for, and treatment processes occurring in, landbased treatment of dairy factory wastewater; irrigation system
operation and its integration with farm management; and
design and selection of key components of wastewater
irrigation systems.
Classification
Dairy Manufacturing > Dairy Environmental Management
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Open.
Explanatory notes
1
Organisational requirements refer to instructions to staff on policy and procedures
which are documented in memo and/or manual format and are available in the
workplace. These requirements include but are not limited to – site specific
requirements, company quality management requirements, hygiene, health and
safety, regulatory and legislative requirements.
2
Legislative requirements include but are not limited to Resource Management Act
1991, relevant codes of practice, and subsequent amendments.
3
Routine explanations and reports may be in everyday workplace language including
mathematical language and some commonly used technical terms, be presented
orally, be presented in writing using standard format, proforma, charts and diagrams,
include mathematical and other information from several sources.
4
Assessment is to be made in the industry context, and should take place primarily
on-the-job under normal working conditions.
5
Mathematical operations may include routine estimation and calculation and involve
percentages, comparisons, and variations. Calculators may be used.
6
Descriptions of work practices must be in accordance with codes of practice and
organisational requirements.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
19328 version 5
Page 2 of 3
Outcomes and evidence requirements
Outcome 1
Explain soil requirements for, and treatment processes occurring in, land-based treatment
of dairy factory wastewater.
Evidence requirements
1.1
Soil requirements are explained in terms of suitability of soil types and structure
for wastewater irrigation.
Range
suitability – hydraulic capacity, infiltration rate, maintenance of soil
structure.
1.2
Situations that can lead to degradation of soil structure are identified along with
measures that may be taken for prevention.
1.3
The nutrient cycle is explained in terms of balancing nitrogen addition and
nitrogen losses to minimise nitrogen leaching to groundwater.
Outcome 2
Explain irrigation system operation and its integration with farm management.
Evidence requirements
2.1
Operation of the irrigation system is explained in terms of balancing the disposal
of all wastewater from the dairy factory with prevention of adverse effects on the
land.
Range
2.2
adverse effects – ponding, pasture burning, over-saturation of soil.
Integration of irrigation system operation with farm management is explained in
terms of means to optimise farm productivity and wastewater disposal.
Range
means – cropping, cut and carry, integration of stocking and
irrigation rotation.
Outcome 3
Explain design and selection of key components of wastewater irrigation systems.
Evidence requirements
3.1
Design considerations are identified in terms of importance and influence on
achieving optimal design.
Range
considerations – hydraulic loading, organic loading, sodium and
ash, irrigation rotation frequency.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
3.2
19328 version 5
Page 3 of 3
Key components for an irrigation system are selected and applied for a given
dairy factory wastewater irrigation task.
key components – pumps, control system, paddock valves,
irrigation network, sprinklers.
Range
Replacement information
This unit standard has been replaced by unit standard
29124
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
28 May 2002
31 December 2018
Revision
2
21 November 2002
31 December 2018
Revision
3
13 June 2003
31 December 2018
Rollover
4
17 July 2009
31 December 2018
Review
5
17 September 2015
31 December 2018
Consent and Moderation Requirements (CMR) reference
0022
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.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016