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

Critical aspects for assessment and evidence required to demonstrate competency in this unit

The evidence required to demonstrate competency in this unit must be relevant to worksite operations and satisfy all of the requirements of the performance criteria, required skills and knowledge and the range statement of this unit and include evidence of the following:

knowledge of the requirements, procedures and instructions for implementation of the ventilation management plan

implementation of procedures and techniques for the safe, effective and efficient implementation of the ventilation management plan

the identification of the relevant information and scope of the work required to meet the required outcomes

the identification of viable options and the selection of processes for the implementation of the ventilation management plan that best meet the required outcomes

working with others to undertake and complete the implementation of the ventilation management plan

consistent successful implementation of the ventilation management plan

Context of and specific resources for assessment

This unit must be assessed in the context of the work environment. Where personal safety or environmental damage are limiting factors, assessment may occur in a simulated environment provided it is realistic and sufficiently rigorous to cover all aspects of workplace performance, including task skills, task management skills, contingency management skills and job role environment skills.

Assessment of this competency requires typical resources normally used in a resources and infrastructure sector environment. Selection and use of resources for particular worksites may differ due to the site circumstances.

The assessment environment should not disadvantage the participant. For example, language, literacy and numeracy demands of assessment should not be greater than those required on the job.

Customisation of assessment and delivery environment should sensitively accommodate cultural diversity.

Aboriginal people and other people from a non English speaking background may have second language issues.

Where applicable, physical resources should include equipment modified for people with disabilities. Access must be provided to appropriate learning and/or assessment support when required.

Method of assessment

This unit may be assessed in a holistic way with other units of competency. The assessment strategy for this unit must verify required knowledge and skill and practical application using more than one of the following assessment methods:

written and/or oral assessment of the candidate's required knowledge to apply in undertaking of the implementation of the ventilation management plan

observed, documented and/or first hand testimonial evidence of the candidate's:

implementation of appropriate requirements, procedures and techniques for the safe, effective and efficient achievement of required outcomes

identification of the relevant information and scope of the work required to meet the required outcomes

identification of viable options and the selection of processes for the implementation of the ventilation management plan that best meet the required outcomes

consistent achievement of required outcomes

first hand testimonial evidence of the candidate's:

working with others to undertake and complete the implementation of the ventilation management plan

provision of clear and timely required support and advice on the implementation of the ventilation management plan

Guidance information for assessment

Consult the SkillsDMC User Guide for further information on assessment including access and equity issues.

Required skills

Specific skills are required to achieve the Performance Criteria of this unit, particularly for its application in the various circumstances in which this unit may be used. This includes the ability to carry out the following as required to implement the ventilation management plan:

apply legislative, organisation and site requirements and procedures for implementation of the ventilation management plan

access, interpret and apply technical information

access and analyse ventilation information related to the mine including archival and historical information

measure air quality and quantity

perform routine operational mathematical calculations (quantity, pressure, prediction)

interpret and apply design criteria for ventilation systems and devices

interpret computer spreadsheets and ventilation modelling/simulations

collect, collate and interpret ventilation data

conduct enquiries/investigations and prepare reports

communicate effectively in the workplace

access, interpret and apply data from monitoring systems and equipment

operate hand held monitoring equipment

implement the ventilation management training plan

apply risk management processes and techniques

implement emergency response and evacuation procedures

Required knowledge

Specific knowledge is required to achieve the Performance Criteria of this unit, particularly for its application in the various circumstances in which this unit may be used. This includes knowledge of the following as required to implement the ventilation management plan:

legislative and site requirements for ventilation including:

air quality and quantity

maximum and minimum values

control and distribution

flammable gas and dust limits

ventilation fans

gas monitoring

respirable dust limits

inspections

recording/reporting

methods of mine ventilation and their applications/limitations including:

exhaust/force

antitropal

homotropal

flank returns

ascensional/descensional

bleeder

Z/U/Y systems

other combinations

methods of panel ventilation and their applications/limitations including:

homotropal and antitropal auxiliary fans

coursed ventilation (narrow side/wide side)

machine mounted scrubber systems

compressed air venturis and bleeders

impact of mining techniques

impact of mine and panel design on ventilation

mine roadways and shafts and their impact on mine ventilation

impact of material characteristics and seam gradients on mine ventilation design

impacts on ventilation system of gas drainage, spontaneous combustion, outburst and windblast

mine gases; types and characteristics, sources, physiological effects and methods of detection

dust, fumes and other particulate matter; the types, sources, physical and physiological effect and control/mitigation methods

mine fires; the types, sources of ignition, possible effects on the ventilation circuit and prevention/control/mitigation methods

mine explosions; types, ignition sources, possible effects on the ventilation circuits and prevention/control/mitigation methods

pressure changes; causes, impacts on the ventilation system, and responses (to include the causes and effects of natural ventilation and re-circulation)

heat/humidity; sources and factors which may impact on mine ventilation and personnel

mine fans including:

fan types

applications

limitations

ventilation control devices; types, purposes, design criteria and specifications, distribution/placement criteria and limitations

de-gassing; methods of control - including brattice, auxiliary fans, compressed air venturis, sails, hurdles and bleeders

fixed ventilation monitoring systems types, uses and limitations

portable monitoring equipment, types, characteristics, uses and limitations

functions, capabilities, advantages, limitations and use of computer modelling tools and simulation techniques

basic computer-based systems used for mine ventilation monitoring and analysis

ventilation management plan development requirements and processes

ventilation surveys; the types, frequency and method for conducting including pressure/quantity/temperature and gas

respirable dust survey requirements

processes and techniques for determining alarms and trigger points/levels

audit and review processes and techniques

site document control requirements

emergency preparedness and plan response/measures

airway resistance and fan curves and duty points

general use and application of ventilation theory including:

psychrometry and heat

gas laws including Charles and Boyle

natural ventilation pressures

air quality measurement

control device leakage

duct leakage

regulator

equivalent office calculation and Kirchoff's laws

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.

Relevant compliance documentation may include:

legislative, organisational and site requirements and procedures

manufacturer's guidelines and specifications

Australian standards

Employment and workplace relations legislation

Equal Employment Opportunity and Disability Discrimination legislation

Ventilation management plan may include:

establishing procedures for maintaining optimum mine ventilation including:

hazard identification and quantification

emergency and evacuation procedures

risk assessment

authority and responsibility

controls established to manage identified risks

reporting and communication

document control

audit and review specifications

Mine atmosphere includes:

atmosphere in all areas in the general mine ventilation district and beyond into waste working and goafs in the mine

Standards and procedures include:

construction

action response

permit to work

condition monitoring

auditing

maintenance

document control

atmosphere monitoring

ventilation system control

communication systems

survey procedures

sealing procedures

changes

training

systems recording/reporting

Ventilation management training may include:

mine workers

trades people

permanent employees

contractors

mine official

other special requirements

Water may:

impact on the mine ventilation management plan through

liberation of dissolved gases

capture of soluble gases and fumes

gas drainage efficiency

seam moisture infusion or drainage

dust liberation and suppression

large ingresses disrupting ventilation networks

ventilation requirements for pumping stations

influence on sponcom propensity

humidity

hydrostatic pressure

Maintenance may include:

inspection

servicing

repair