NZQA registered unit standard
22103 version 3
Page 1 of 4
Title
Describe trenching and demonstrate trench set-out requirements for
water reticulation
Level
4
Purpose
Credits
4
People credited with this unit standard are able to: describe
safety requirements of water and drainage construction;
demonstrate the use of equipment for trench surveying; and
demonstrate knowledge of bed preparation, backfill,
compaction, and reinstatement of trenches.
This unit standard is for people who supervise maintenance
and operations in water reticulation, and people who work in
specialist water reticulation activities.
Classification
Water Industry > Water Reticulation
Available grade
Achieved
Explanatory notes
1
Legislation includes but is not limited to the Health and Safety in Employment Act
1992.
2
Definitions
Organisational procedures – the documented procedures for safety detailed in
documents which may include but are not limited to – quality assurance documents,
the monitoring programme and compliance database, and maintenance contract
conditions.
Water reticulation – in this context refers to all pipe systems, pumping systems, and
components that contribute to the distribution of water, and collection and disposal of
wastewater and stormwater.
3
Codes of practice
SNZ HB 2002:2003 Code of Practice for Working in the Road, available from
http://www.standards.co.nz.
Code of Practice for Temporary Traffic Management, available from
http://www.nzta.govt.nz/resources/code-temp-traffic-management.
4
Standards
AS/NZS 2566.2:2002 Buried flexible pipelines - Installation.
AS/NZS 2033:2008 Installation of polyethylene pipe systems.
NZS 4404:2010 Land development and subdivision infrastructure.
AS/NZS 2032:2006 Installation of PVC pipe systems,
The above standards are available from http://www.standards.co.nz.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
22103 version 3
Page 2 of 4
Outcomes and evidence requirements
Outcome 1
Describe safety requirements of water and drainage construction.
Evidence requirements
1.1
Personal protective equipment for water and drainage construction is identified
and described in accordance with organisational procedures.
1.2
Hazards are identified and managed in accordance with the Health and Safety
in Employment Act 1992 and organisational procedures.
1.3
Trench shoring requirements are identified and described in accordance with
contract drawings.
Range
1.4
trench depth, trench alignment, ground condition, material type.
Traffic control requirements are identified and described in accordance with
Code of Practice for Temporary Traffic Management.
Outcome 2
Demonstrate the use of equipment for trench surveying.
Range
one of – tape measure, automatic level, laser; manual – stringline, profiles.
Evidence requirements
2.1
Depth of trenching is set in accordance with plans and specifications for the job.
2.2
Gradient of trenching is set in accordance with plans and specifications for the
job.
2.3
Horizontal alignment is set in accordance with plans and specifications for the
job.
Outcome 3
Demonstrate knowledge of bed preparation, backfill, and compaction of trenches.
Evidence requirements
3.1
Materials used for bed preparation and trench backfill are described in terms of
their properties, and suitability for specified situations and specified pipe
materials.
Range
materials – hard fill, graded or bound, re-use of existing material;
properties – grading, moisture content, compaction.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3.2
22103 version 3
Page 3 of 4
Bed preparation, backfilling, and compaction are described in terms of the
equipment and procedures.
compacting equipment – foot compactor, plate compactor.
Range
3.3
Bed preparation, backfilling, and, compaction are described in terms of the
implications of not following procedures for good practice.
3.4
Compaction is described in terms of the equipment used to test strength of
layers.
testing equipment – penetrometer, Clegg Hammer, nuclear
densometer.
Range
Outcome 4
Demonstrate knowledge of reinstatement of trenches.
Range
asphaltic concrete, chip seal, concrete, soil, pavers and cobbles.
Evidence requirements
4.1
Trench surface reinstatement procedures and requirements are described in
terms of the Codes of Practice.
Planned review date
31 December 2016
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
26 October 2005
31 December 2016
Rollover and
Revision
2
20 February 2009
31 December 2016
Rollover and
Revision
3
21 July 2011
N/A
Consent and Moderation Requirements (CMR) reference
0179
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.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
22103 version 3
Page 4 of 4
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 (CMRs). 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.
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.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016