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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. |
Design requirements include: | architectural specifications builder specifications owner requirements specialist water use applications. |
Work scope: | includes: application of the irrigation project interpretation of plans and specifications sizing and documenting layout of irrigation systems, for applications including residential, commercial, industrial and agricultural may be for new projects or an existing structure being renovated, extended, restored or maintained. |
Cost-benefit analysis includes: | comparison of range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of project. |
Statutory and regulatory requirements and Australian and New Zealand standards include: | Acts and regulations Australian and New Zealand standards, including: AS/NZS3500 National plumbing and drainage set AS2200 Design charts for water supply and sewerage BCA local and state government policies. |
Manufacturer requirements include: | material specifications pump tables sizing tables technical and trade manuals. |
Desktop study includes collection and interpretation of existing data for design purposes from: | building plans council plans developer plans landscape and architectural plans other documents and reports as available. |
Flow and pressure tests include: | interpretation of flow and pressure tests conducted by a contractor on-site measurement of flows (l and s), velocity (m and s) and pressure (kPa). |
Water sources, volumes and areas to be irrigated include: | sources: creeks dams lakes mains supply rivers streams tanks volumes and areas: amount and duration of water supply areas to be irrigated number of stations required total amount and flow rate required at each station. |
Soil types include: | gravels light, medium and heavy clays loams rock sands. |
Performance requirements include: | flow, velocity, pressure and discharge requirements, established using Australian and New Zealand standards and local authority requirements. |
Layout of pipework systems: | includes: distribution dual feed systems range pipes ring main single pipe station break-up should not unduly affect aesthetic appeal and building integrity should have principles of economy, serviceability, durability and fit for use applied. |
Fittings and valves include: | fittings: bends elbows tees unions valves: backflow prevention excess pressure isolating pressure limiting pressure reduction strainers. |
Backflow prevention devices include: | break tanks individual protection property protection testable and non-testable devices zone protection. |
Materials include: | acrilonitrile butadiene styrene (ABS) composite pipework copper fittings and fixtures polybutylene polyethylene protective coatings steel. |
Jointing methods include: | brazing compression flaring mechanical joints rubber ring joints soldering threading. |
Sections and components of the irrigation system include: | irrigation stations: number, size, area, volume of water required, delivery requirements, operation and activation of stations, sprinkler patterns, location and distribution of sprinkler heads, obstacle avoidance, water minimisation, waste minimisation and timing manifold systems: manifolds to stations, headers, branches, timers, isolators, servo valves, electronics, power supplies and manual activation sensors: moisture sensors, soil sensors, temperature sensors, humidity sensors, weather stations and computer automation automatic controls: station controllers, servo valves, isolating valves, water tractors and timers sprinklers, drippers and irrigators: sprinkler heads, sprinkler flows, impact sprinklers, gear-driven sprinklers, water tractors, water cannons, tape drippers, individual drippers, flow controlled drippers, in-ground irrigation tapes and root inhibitor systems sprinkler patterns: head to head, square, triangular, circular, quarter overlap, half overlap, full overlap, double overlap and other overlap patterns. |
Pipe fixings include: | anchors bedding bracket spacing corrosion protection cover hanging brackets material requirements saddles wall and ceiling brackets. |
Pump, pump controls and pumproom requirements include: | automatic controls impeller sizing inlet and outlet design requirements installation and mounting requirements pump selection pump sizing space requirements valve requirements. |
Installation requirements include: | bedding clipping installation details jointing requirements level of workmanship. |
Applications: | include: agricultural crops garden irrigation golf courses greenhouses lawn watering nurseries should also cover: individual crop water requirements types of plants and their respective crop factors. |
Delivery systems and patterns include: | main delivery number and design of stations design includes: avoiding obstacles irregular shapes minimising water wastage range of irrigation applications range pipes ring mains size and delivery of sprinklers sprinkler head placement sprinkler patterns. |
Plans include: | axonometrics cross-sections details elevations isometrics schematics, which may be produced using: computer generation Indian ink pencil pigment liner sections. |
Specification includes: | bedding clipping jointing manufacturer materials specialised components valve selection workmanship. |
Testing includes: | air pressure test defect inspection hydrostatic test mains pressure test quality assurance (QA) audit. |
Commissioning schedule includes: | flow test leak check pressure test system flush valve operation. |
Operation and maintenance manual includes: | leak detection pump maintenance valve maintenance water auditing yearly inspection yearly maintenance requirements. |