Elements and Performance Criteria

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Work health and safety is to be according to commonwealth, state and territory legislation and regulations and may include:
handling of materials
hazard control
personal protective clothing and equipment prescribed under legislation, regulations and workplace policies and practices
safe operating procedures, including recognising and preventing hazards associated with:
electrical components and safety
gas fires and explosions
hazardous materials and substances
other machines
surrounding structure and facilities
trip hazards
underground services
use of tools and equipment
work site visitors and the public
working at heights
working in confined spaces
working in proximity to others
use of firefighting equipment
use of first aid equipment
workplace environment and safety.

Environmental requirements may include:
air pollution
clean-up protection
environmental protection
waste management.

Gas installations may include:
liquefied petroleum gas
natural gas
simulated natural gas
tempered liquefied petroleum gas.

Tools and equipment may include:
computers running appropriate CAD software
drawing instruments
measuring equipment.

Information may include:
charts and hand drawings
instructions issued by authorised organisational or external personnel
job drawings
manufacturer specifications and instructions
material safety data sheets (MSDS)
memos
organisation work specifications and requirements
plans and sketches
regulatory and legislative requirements, particularly those pertaining to:
building codes
gas regulations
WHS and environmental requirements
plumbing regulations
relevant Australian standards, including AS5601 Gas installations
safe work procedures relating to planning, sizing and documenting the layout of gas installations
signage
verbal, written and graphical instructions
work bulletins
work schedules, plans and specifications.

Statutory and regulatory authorities include:
commonwealth, state or territory, and local authorities administering applicable Acts, regulations and codes of practice.

Materials may include:
building plans and specifications.

Sustainability principles and concepts:
cover the current and future social, economic and environmental use of resources
may include:
use of efficient design principles to ensure minimal environmental impact
incorporation of efficient use of material into the design, including recycling of material
choice of efficient energy and water appliances
correct handling of hazardous materials
disposing of waste material to ensure minimal environmental impact.

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment
This unit of competency could be assessed in the workplace or a close simulation of the workplace environment providing that simulated or project-based assessment techniques fully replicate plumbing and services workplace conditions, materials, activities, responsibilities and procedures.

Critical aspects for assessment and evidence required to demonstrate competency in this unit
A person who demonstrates competency in this unit must be able to provide evidence of:
locating, interpreting and applying relevant information, relevant Australian standards and specifications to the planning, sizing and layout of gas installations
applying safety requirements throughout the work sequence, including electrical safety requirements and the use of personal protective clothing and equipment
designing, sizing and documenting the layout of three gas installations, which are to include any combinations covering:
pipe sizing and pressures up to 200kPa
at least one NG installation
at least one LPG installation
at least one domestic installation
at least one commercial installation
a caravan installation
a marine installation, including the installation of an LPG leak detection system in a mono hull vessel
installations planned and documented must include:
multiple buildings
a two stage LPG system
five or more gas appliances
domestic and commercial Type A gas appliances
a common flue system
a minimum of three piping materials
an over-pressure protection device
a subsidiary meter
plans and documentation should ensure:
application of sustainability principles and concepts
identification, evaluation and incorporation of sustainability principles and concepts into the design
correct identification of location, design and details of proposed services
correct selection and use of appropriate processes, tools and equipment
completion of all work to specification
compliance with regulations, relevant Australian standards and organisational quality procedures and processes
communicating and working effectively and safely with others.

Context of and specific resources for assessment
This competency is to be assessed using standard and authorised work practices, safety requirements and environmental constraints.
Assessment of essential underpinning knowledge will usually be conducted in an off-site context.
Assessment is to comply with relevant regulatory or Australian standards' requirements.
Resource implications for assessment include:
an induction procedure and requirement
realistic tasks or simulated tasks covering the minimum task requirements
relevant specifications and work instructions
tools and equipment appropriate to applying safe work practices
support materials appropriate to activity
workplace instructions relating to safe work practices and addressing hazards and emergencies
material safety data sheets
research resources, including industry-related systems information.
Reasonable adjustments for people with disabilities must be made to assessment processes where required. This could include access to modified equipment and other physical resources, and the provision of appropriate assessment support.

Method of assessment
Assessment methods must:
satisfy the endorsed Assessment Guidelines of the Construction, Plumbing and Services Training Package
include direct observation of tasks in real or simulated work conditions, with questioning to confirm the ability to consistently identify and correctly interpret the essential underpinning knowledge required for practical application
reinforce the integration of employability skills with workplace tasks and job roles
confirm that competency is verified and able to be transferred to other circumstances and environments.
Validity and sufficiency of evidence requires that:
competency will need to be demonstrated over a period of time reflecting the scope of the role and the practical requirements of the workplace
where the assessment is part of a structured learning experience the evidence collected must relate to a number of performances assessed at different points in time and separated by further learning and practice, with a decision on competency only taken at the point when the assessor has complete confidence in the person's demonstrated ability and applied knowledge
all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence.
Assessment processes and techniques should as far as is practical take into account the language, literacy and numeracy capacity of the candidate in relation to the competency being assessed.
Supplementary evidence of competency may be obtained from relevant authenticated documentation from third parties, such as existing supervisors, team leaders or specialist training staff.