11153 version 5
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Design infrastructure and services for subdivisions
Level
6
Credits
15
Purpose
This unit standard is for people who are working, or who intend to work, in
the surveying industry, as a survey technician.
People credited with this unit standard are able to: demonstrate knowledge of
factors affecting stormwater management; design stormwater disposal
systems for an urban subdivision; design water supply reticulation for an
urban or rural subdivision; design wastewater disposal systems for
subdivisions; and design road access ways for an urban subdivision.
Subfield
Surveying
Domain
Subdivisional Design
Status
Registered
Status date
25 February 2008
Date version published
25 February 2008
Planned review date
31 December 2012
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Infrastructure ITO
Accreditation and Moderation Action Plan (AMAP) reference
0101
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
Legislation and documentation relevant to this unit standard include:
Conservation Act 1987;
Land Drainage Act 1908;
Resource Management Act 1991;
AS 2200:2006 Design charts for water supply and sewerage;
NZS 4404:2004 Land development and subdivision engineering;
SNZ/PAS 4509:2003 New Zealand Fire Service Fire Fighting Water Supplies Code of
Practice;
 New Zealand Qualifications Authority 2016
11153 version 5
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TP10 Stormwater treatment devices: design guidelines manual, and
TP58 On-site wastewater systems: design and management manual, and
TP90 Erosion and sediment control: guidelines for land disturbing activities in the Auckland
Region, and
TP108 Guidelines for stormwater runoff modelling in the Auckland region, and
TP124 Low impact design manual for the Auckland region, all Auckland Regional Council
Technical Publications, available at http://www.arc.govt.nz or local equivalents;
catchment management plans;
regional and district plans;
territorial authority rules and standards for subdivisions;
water utility standards.
Elements and performance criteria
Element 1
Demonstrate knowledge of factors affecting stormwater management.
Performance criteria
1.1
Factors affecting water run-off and soil conservation are described in
accordance with regional plan requirements.
Range
1.2
Methods and applications for erosion control systems are described in
accordance with territorial authority standards.
Range
1.3
factors – soil type, land use, vegetation, slope, climate.
erosion control methods – gabions, planting, drainage networks,
geotechnical mats, other;
evidence is required of at least four methods.
Factors which influence erosion control activities are described in accordance
with territorial authority standards.
Range
factors – social, cultural, environmental, historical, economic,
technical;
evidence is required for one example of each factor.
 New Zealand Qualifications Authority 2016
11153 version 5
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Element 2
Design stormwater disposal systems for an urban subdivision.
Range
evidence for this element must comprise the design of stormwater disposal for a
subdivision of an urban site into at least four lots.
Performance criteria
2.1
A physical and documentary investigation establishes existing stormwater flow
characteristics that comply with territorial authority standards
Range
territorial authority standards may include – TP10, TP90, TP108;
evidence is required of calculations using the rational method.
2.2
Present and future stormwater flows are established in accordance with the
results of the investigation, territorial authority standards, and the catchment
management plan.
2.3
Stormwater management problems are identified and options for their solution
are given in terms of their actual and potential effects on the catchment area.
Range
2.4
problems may include but are not limited to – coastal, streams less
than three metres wide;
evidence is required of at least two problems.
The disposal system for an urban subdivision is established taking account of
present and future land use, and in accordance with environmental legislation,
and territorial authority standards.
Element 3
Design the water supply reticulation for an urban or rural subdivision.
Range
evidence for this element must comprise the design of the water supply for
either an urban subdivision of at least four lots; or a rural subdivision of at least
ten hectares with reticulation for stock, and/or horticulture, and/or processing
primary products.
Performance criteria
3.1
Present and future water supply demand is established through physical and
documentary investigation to comply with territorial authority standards and the
New Zealand Fire Service Fire Fighting Water Supplies Code of Practice.
Range
pressure, quality, fire-fighting demand, peak demand, storage,
cost, seasonal fluctuations, demand considerations, reticulation
condition, performance characteristics.
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3.2
A detailed design for water supply reticulation is developed and presented in
accordance with project data and design parameters to comply with territorial
authority standards and the New Zealand Fire Service Fire Fighting Water
Supplies Code of Practice.
Range
project data and design parameters include but are not limited to –
investigation results, manufacturer’s specifications, safety
requirements, risk management, territorial authority requirements;
detailed design includes – calculations, sketches, technical
specifications, drawings.
Element 4
Design wastewater disposal systems for subdivisions.
Range
systems – urban reticulated, either urban or rural on-site.
Performance criteria
4.1
Physical and documentary investigations for present and future water flows
establish design parameters for wastewater disposal that comply with territorial
authority standards.
Range
4.2
A detailed design for wastewater reticulation is developed and presented in
accordance with project data and design parameters that comply with territorial
authority standards and the district plan.
Range
4.3
design parameters – reticulation, performance characteristics, pipe
hydraulics, seasonal discharge fluctuations, user demand;
territorial authority standards may include – TP58.
details include – calculations, sketches, technical specifications,
drawings;
project data and design parameters include but are not limited to –
investigation results, manufacturer’s specifications, safety
requirements, risk management.
A detailed design for an on-site disposal system for wastewater is developed
and presented in accordance with project data and design parameters to
comply with territorial authority standards and/or manufacturer’s specifications,
and/or TP58.
Range
septic tank, or composting system, or evapotranspiration system.
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11153 version 5
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Element 5
Design road or access ways for an urban subdivision.
Range
a cul de sac of about 50 m in length, or a joint access way of 60 m in length.
Performance criteria
5.1
Potential traffic and pedestrian counts establish design parameters for road or
access ways taking account of the number and size of allotments.
5.2
A detailed design for vehicular and pedestrian access is developed and
presented in accordance with project data and design parameters to comply
with NZS 4404 and territorial authority standards.
Range
details include – soil properties, basecourse depth, basecourse
material, carriageway width, crossfall, kerb and channel, pavement
surface, parking, location of underground services, location of
above ground services, vehicle entrances, footpaths.
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 Infrastructure ITO askus@infratrain.co.nz if you wish to suggest changes to
the content of this unit standard.
 New Zealand Qualifications Authority 2016