NZQA registered unit standard
23288 version 3
Page 1 of 2
Title
Explain single point groundwater control for an infrastructure works
excavation
Level
3
Credits
2
Purpose
People credited with this unit standard are able to: explain
single point groundwater control excavations, and explain
disposal methods for water pumped from an infrastructure
works excavation.
Classification
Infrastructure Works > Generic Infrastructure Works
Available grade
Achieved
Explanatory notes
1
The following legislation and requirements apply to this unit standard:
Health and Safety in Employment Act 1992;
Resource Management Act 1991;
Regional and local authority requirements, which may include local network
operators.
2
Assessment against this unit standard may be based on evidence from provider
and/or workplace contexts.
3
Definition
Single point pumping refers to removing groundwater from one location as opposed
to well pointing that draws water from multiple well points drilled into the ground.
Single point pumping may or may not be located in a trench.
Outcomes and evidence requirements
Outcome 1
Explain single point groundwater control for an infrastructure works excavation.
Evidence requirements
1.1
Groundwater control is explained in terms of dewatering an excavation using
single point pumping.
Range
Infrastructure ITO
SSB Code 101813
explanation may include but is not limited to – soil type, ground
condition, effect of dewatering on excavation stability, grade,
depth, type of excavation, pipes and/or structures, timeline,
urgency.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
23288 version 3
Page 2 of 2
Outcome 2
Explain disposal methods for water pumped from an infrastructure works excavation.
Evidence requirements
2.1
Disposal methods are explained in terms of relative contamination of the
removed water, equipment and/or structures used, and regional and local
authority environmental requirements.
Range
filtration, flocculation, retention, decanting, dispersal, evaporation.
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Status information and last date for assessment for superseded versions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 January 2007
31 December 2012
Review
2
21 November 2008
31 December 2012
Review
3
21 July 2011
N/A
Consent and Moderation Requirements (CMR) reference
0101
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 (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 Infrastructure ITO askus@infratrain.co.nz if you wish to suggest changes to
the content of this unit standard.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016