12504 version 4
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Perform and record walking leakage surveys in a gas distribution
network
Level
3
Credits
6
Purpose
People credited with this unit standard are able to: locate and identify
procedures, documentation, and equipment for walking leakage surveys;
perform a walking gas leakage survey; and complete reporting and
documentation.
Subfield
Gas Industry
Domain
Gas Network Operations
Status
Registered
Status date
20 November 2006
Date version published
20 November 2006
Planned review date
31 December 2011
Entry information
Prerequisites: National Certificate in Gas Industry (Gas
Distribution) (Level 2) [Ref: 1020], and Unit 12507, Use
gas leakage detection equipment on reticulated gas
networks; or demonstrate equivalent knowledge and
skills.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
NZ Motor Industry Training Organisation (Incorporated)
(MITO)
Accreditation and Moderation Action Plan (AMAP) reference
0114
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
This unit standard is intended for, but not limited to, workplace assessment. The
range statements relate to enterprise specific equipment, procedures, and
processes.
2
The current version of following documents must be complied with:
Health and Safety in Employment Act 1992;
NZS 5258:2003 Gas distribution networks available at http://www.standards.co.nz/.
 New Zealand Qualifications Authority 2016
12504 version 4
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3
All work practices must comply with regulations and codes of practice pertaining to
the gas industry. A full list of applicable regulations and codes is available from the
NZ Motor Industry Training Organisation (Incorporated) (MITO).
4
Definition
Company procedures means the documented methods for performing work activities
and include health and safety, environmental, and quality management requirements.
They may refer to manuals, codes of practice, or policy statements.
Elements and performance criteria
Element 1
Locate and identify procedures, documentation, and equipment for walking leakage
surveys.
Performance criteria
1.1
Company procedures for walking leakage survey are located and interpreted in
relation to specified job requirements.
1.2
Job instructions are confirmed in accordance with company procedures.
Range
instructions include – defined route, network plans, consents,
easements, frequency of survey.
1.3
Potential environmental and safety hazards are identified in accordance with
company procedures.
1.4
Equipment and materials for walking leakage survey are identified and
described in terms of type and function.
Range
1.5
gas detector, marking, recording.
Resource requirements are identified and sourced in accordance with company
procedures.
Range
plant, tools, materials, documentation, system components,
personnel, communication equipment, weather protection.
Element 2
Perform a walking gas leakage survey.
Performance criteria
2.1
Safety hazards are identified, and isolated, removed, or minimised in
accordance with company procedures.
Range
may include – personal protective equipment, safe access and
egress, fire, explosion, asphyxiation, environmental protection, gas
escapes.
 New Zealand Qualifications Authority 2016
12504 version 4
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2.2
Survey areas are identified in accordance with gas system status, type, and
company procedures.
2.3
Problems of survey are identified and managed in accordance with company
safety procedures.
Range
2.4
accessibility, location and ground surface conditions, traffic,
weather.
Readings are taken along defined route in accordance with company
procedures.
Range
location, classification.
Element 3
Complete reporting and documentation.
Performance criteria
3.1
Information is communicated to other parties, both internal and external, in
accordance with company procedures.
Range
3.2
may include but is not limited to – event report, survey completion
notice, special conditions, additional work.
Records and documents are completed and processed in accordance with
company procedures.
Please note
Providers must be accredited by the Qualifications Authority, 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 the Qualifications Authority 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 NZ Motor Industry Training Organisation (Incorporated) (MITO)
info@mito.org.nz if you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016