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 conducting aeration processes

implementation of requirements, procedures and techniques for the safe, effective and efficient completion of aeration processes

working with others to undertake and complete the aeration process in a way that meets all of the required outcomes

consistent timely completion of aeration processes that safely, effectively and efficiently meets the required outcomes

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 to 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

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

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

consistent achievement of required outcomes

first hand testimonial evidence of the candidate's:

working with others to undertake and complete the aeration process

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 conduct aeration processes:

apply legislative, organisation and site requirements and procedures for conducting aeration processes

find faults

interpret reports

lift (manual, cranes and loads)

use safe work practices

use hand and power tools

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 conduct aeration activities:

breakdown procedures

contaminant identification

aeration process

emergency procedures

environmental procedures

equipment limitations and operating parameters

equipment safety requirements

repair requirements

aeration plant isolation procedures

metallurgical and technical data

OHS procedures associated with conducting aeration processes

operational procedures and checks

site procedures

site safety requirements

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

Legislation may include Acts and regulations dealing with:

mining safety and health

mine inspection

OHS

explosives

Pre-start checks may include:

availability of equipment (e.g. conveyor)

detection of conditions that are unusual

personnel availability

job requirements

levels

walk through plant

Environmental issues may include:

drainage

dust (dump)

emissions

flora and fauna

hazardous chemicals

noise

recycling

run-off

spills

waste management and disposal

water quality

Start-up procedures may include the inspection of:

agitators

cameras and monitors

interlocks

distribution control system

launders

hydraulic system

pumping system

screen inspections

scuttling pumps

pipes and flanges

drive belts

valves

visual and audio warning devices and lights

suppression systems

Plant may include:

agitators

blowers

valves

pumps

hoppers

vessels (aerator)

hoses

air/slurry/water lines

silences

tank (process liquor, reagent holder)

conveyors

weight and vibrating feeder

Indicator readings may measure:

flow

current (e.g. agitators)

density

levels

restrictions

air flows

pressure

speed (e.g. pumps)

unusual noises

vibrations

power

temperature

Aeration methods may include:

batch

continuous

Monitoring the aeration process may include the checking of:

blockages and spillages

feed rates

mineral content

moisture levels

on stream analysis (OSA)

overloads

pressures (e.g. in air lines)

power draw

wear and tear

emission (e.g. cyanide)

levels

hydrogen bubbles

end point testing (batch)

temperature

Operating parameters may include:

reagent additions

reduce produce/feed/tonnes

hectalilte of processes liquor

Equipment and plant cleaning methods may include:

hosing with water

high pressure cleaning

Shutdown procedures may include:

cleaning of sparge lines

charge and empty discharge lines

Post-shutdown checks are like pre-start checks.

Tests may include:

magnetic tests

on-line conductivity

temperature measurements

Materials may include:

slurry (reagent, dry product, liquor)

Contaminants are anything other than the ore. Common contaminants may include:

oil

fuel

gases

organic materials

moisture