25007 version 1
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Demonstrate knowledge of rail tunnel gas and use gas detection and
protection equipment
Level
2
Credits
3
Purpose
People credited with this unit standard are able to: demonstrate knowledge of
rail tunnel gas types, sources, and reasons for gas accumulation;
demonstrate knowledge of exposure to rail tunnel gas; demonstrate
knowledge of and use gas exposure protection equipment; and demonstrate
knowledge of and use rail tunnel gas detection equipment.
Subfield
Rail Transport
Domain
Rail Core Skills
Status
Registered
Status date
20 June 2008
Date version published
20 June 2008
Planned review date
31 December 2013
Entry information
Open.
Accreditation
Evaluation of documentation by NZQA.
Standard setting body (SSB)
Competenz
Accreditation and Moderation Action Plan (AMAP) reference
0013
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
For the purposes of this unit standard, use of detection and protection equipment will
be through a safe, controlled exercise, not necessarily involving a rail tunnel, but
where environmental factors provide an opportunity for such equipment to function in
the way that it is intended.
2
Legislation relevant to this unit standard includes the Health and Safety in
Employment Act 1992, and the Railways Act 2005.
3
Workplace exposure standards relevant to this unit standard can be obtained from
Workplace Exposure Standards (Wellington: Department of Labour, 2002) available
at http://www.osh.dol.govt.nz/order/catalogue/pdf/wes2002.pdf.
 New Zealand Qualifications Authority 2016
25007 version 1
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Definition
Organisational procedures refer to documents that include: worksite rules, codes,
and practices; equipment operating instructions; documented quality management
systems; and health and safety requirements.
Elements and performance criteria
Element 1
Demonstrate knowledge of rail tunnel gas types, sources, and reasons for gas
accumulation.
Performance criteria
1.1
Types of rail tunnel gas are identified by their compound name, and abbreviated
form.
Range
1.2
Sources of rail tunnel gas are identified in terms of gas type.
Range
1.3
evidence is required for a minimum of two gas types.
evidence is required for a minimum of two sources and two gas
types.
Reasons for rail tunnel gas accumulation are described in terms of contributing
factors.
Range
factors may include but are not limited to – lack of ventilation,
length of tunnel, train stalled in tunnel with engine running,
locomotives in multiple.
Element 2
Demonstrate knowledge of exposure to rail tunnel gas.
Performance criteria
2.1
Those at risk of being exposed to rail tunnel gas are identified in terms of their
relationship with the rail transport system.
Range
2.2
evidence is required for a minimum of two types of at risk people.
Workplace exposure standards are described in accordance with definitions
outlined in Workplace Exposure Standards.
Range
may include but is not limited to – Time Weighted Average (TWA),
Short Term Exposure Limit (STEL), ceiling value;
evidence is required for a minimum of two workplace exposure
standards.
 New Zealand Qualifications Authority 2016
25007 version 1
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2.3
Symptoms of exposure to rail tunnel gas are described in terms of gas type,
length of exposure, and gas concentration.
Range
may include but is not limited to – eye irritation, shortness of
breath, dizziness, fatigue, vomiting, loss of consciousness,
cumulative effect;
evidence is required for a minimum of two gas types with two
symptoms for each.
Element 3
Demonstrate knowledge of and use gas exposure protection equipment.
Performance criteria
3.1
Equipment is identified in terms of types available.
Range
3.2
Function and maintenance requirements of face mask and filter are described in
accordance with organisational procedures.
Range
3.3
evidence is required for a minimum of two types of equipment.
may include but is not limited to – air purification, changing filter,
cleaning and disinfecting mask, filter life.
Equipment is used in accordance with organisational procedures, and gas
type(s) present.
Range
may include but is not limited to – selecting filter, checking filter,
donning mask, checking for leaks.
Element 4
Demonstrate knowledge of and use rail tunnel gas detection equipment.
Performance criteria
4.1
Detection equipment and accessories are identified in terms of purpose and
function.
Range
4.2
may include but is not limited to – electronic, chemical reaction
tubes, single gas type, multi-gas type.
Detection equipment is used in accordance with manufacturer’s instructions
and/or organisational procedures.
Range
may include but is not limited to – calibration, date, on/off, menu
selections, battery level.
 New Zealand Qualifications Authority 2016
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4.3
Display information from detection equipment is read and interpreted in
accordance with organisational procedures.
Range
may include but is not limited to – concentration in parts per million
(ppm), % by volume, alarm levels.
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 the Competenz qualifications@competenz.org.nz if you wish to suggest
changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016