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. |
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Procedures | Procedures may be written, verbal, computer-based or in some other form. They may include but are not limited to: all work instructions standard operating procedures formulas/recipes batch sheets temporary instructions any similar instructions provided for the smooth running of the plant good operating practice as may be defined by industry codes of practice Procedures would be expected to comply with any relevant government regulations. |
Logs and reports | Logs and reports may include: paper or electronic-based logs and reports verbal/radio reports reporting items found which require action |
Appropriate action | Appropriate action includes, but is not limited to: collecting information as required in the form of pictures, notes, equipment and waste samples, and so on determining potential problems which may require action to be pre-planned accessing and applying relevant technical and plant data for planning and design purposes considering appropriate problem solving techniques for possible faults planning for problem rectification by applying appropriate solution techniques to areas of responsibility planning for possible incident items until final resolution has occurred developing problem reporting processes and structures for outside area of responsibility/ability to designated person |
Typical problems | Typical problems may include, but are not limited to: insufficient appreciation given to possible rupture of the tailings slurry delivery pipeline or decant water return pipeline lack of full consideration of rainfall induced erosion of the tailings facility containment wall or water imbalance poor understanding of and planning for geotechnical failure/excessive deformation of containment wall lack of provision planned for overfilling with tailings beyond management facility capacity, especially the result of unpredicted tailings production unplanned seepage of hazardous materials through the dam wall or through the foundation into the ground water insufficient design to protect against dust emissions especially of toxic materials unplanned or uncontained floodwater in high rainfall areas |
Tailings/waste characteristics | Tailings/waste characteristics include: mineralogy: residual resource potential, and plant nutrients chemical reactivity: toxicity, leachate potential, acid producing potential, spontaneous combustion, cementation/hydration and weathering physical characteristics: particle size distribution, particle density compressibility, shear strength, liquefaction potential, erodibility and dusting potential placement characteristics: placed dry density, particle sorting, permeability, bearing capacity and initial placement density handling characteristics: solids content of slurries, trafficability during placement, flocculation/settling time and abrasiveness |
Tailings disposal strategy | Tailings disposal strategy can include: the location of discharge points the rotation sequence for discharges the duration of deposition in an area the location of settling ponds and decant facilities the location and timing of intermediate paddock bunding the likely landform created by the deposition processes at stages throughout operations up to and including final landform flowable volumes and potential flow paths operational maintenance requirements (e.g. dust suppression, fauna exclusion and drainage) |
Health, safety and environment (HSE) | All operations to which this unit applies are subject to stringent HSE requirements, which may be imposed through state or federal legislation, and these must not be compromised at any time. Where there is an apparent conflict between Performance Criteria and HSE requirements, the HSE requirements take precedence. |
Work requirements | Work requirements may come from briefings, handovers and work orders and may include: compliance documentation product specifications nature and scope of tasks achievement targets operational conditions geological data site survey data site layout and out of bounds areas worksite inspection requirements lighting conditions plant or equipment defects hazards and potential hazards coordination requirements or issues |