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. |
Scope of work: | must include: interpretation of plans and specifications sizing and documenting layout irrigation systems and documenting layout irrigation systems for applications, including residential, sporting and agricultural properties may be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements must include: | architectural plans backflow requirements interpretation and application of irrigation services, drawings and symbols irrigation management system owner requirements precipitation and evaporation rates pumping requirements required water application to establish and maintain plant life source of irrigation water sprinkler head spacings system requirements water storage requirements. |
Cost-benefit analysis: | compares the range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of project may include: design styles expected design life labour costs material costs required water application to establish and maintain plant life safety factors speed of installation suitability of materials system choices use of recycled or alternative water. |
Statutory and regulatory requirements and relevant Australian standards and codes may include: | Acts, regulations and commonwealth, state or territory, and local government requirements AS/NZS3500 National plumbing and drainage AS2200 Design charts for water supply and sewerage National Construction Code state or territory health department requirements other relevant Australian standards or codes. |
Manufacturer requirements may include: | irrigation management system material specifications pump tables sprinkler head performance sub-surface irrigation technical and trade manuals. |
Desktop study may include collection and interpretation of data for design purposes in: | architectural and building plans site layout plans, which may include: sports ovals golf courses residential, commercial, industrial and agricultural properties local government parks manufacturer data documents, which may include: applications brochures forms policies other reports as available. |
Flow and pressure tests may include: | interpretation of flow and pressure tests on-site measurement of flows (l/s), velocity (m/s) and pressure (kPa). |
Water sources, volumes and areas to be irrigated may include: | sources: drinking water non-drinking (recycled) water rain water grey water creeks dams lakes rivers streams tanks other approved water sources volumes and areas: amount and duration of water supply areas to be irrigated number of control stations required total amount and flow rate required for each control station. |
Soil types may include: | gravels light, medium and heavy clays loams rock sands. |
Performance requirements may include: | flow, velocity, pressure and discharge requirements, established using relevant Australian standards, codes and manufacturer information required water application to establish and maintain plant life. |
Layout of pipework systems: | may include: distribution dual feed systems range pipes ring main single pipe control stations should not unduly affect aesthetic appeal and building integrity should have principles of economy, serviceability, durability and fit for use applied. |
Fittings, valves and controls may include: | fittings: bends elbows sprinkler heads tees unions valves: backflow prevention excess pressure isolating pressure limiting pressure reduction strainers controls: irrigation management system control stations control wiring nodes. |
Backflow prevention devices may include: | double-check valve assembly (DCV) dual-check valve with intermediate vent (DuCV) pressure type vacuum breaker (PVB) reduced pressure zone device (RPZD) registered air gap (RAG) registered break tank (RBT) reduced pressure detector assembly (RPDA) reduced pressure zone device (RPZD) other approved backflow prevention devices may be located as: individual protection zone protection containment protection. |
Materials may include: | composite pipework copper (Cu) cross-linked polyethylene (PE-X) polypropylene (PP) polybutylene (PB) polyvinyl chloride (PVC) other relevant materials. |
Jointing methods include: | brazing compression electrofusion welding flaring mechanical joints rubber ring joints screwing soldering other approved jointing methods. |
Sections and components of the irrigation system must 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 supports may include: | thrust blocks bedding bracket spacing corrosion protection cover manufacturer-recommended specific fixings material requirements provision for pipe movement. |
Pump enclosure and control requirements may include: | acoustic performance automatic change-over automatic controls dual-pump provision impeller sizing inlet and outlet design requirements installation and mounting requirements irrigation management control system pressure gauges pump contols pump selection pump sizing pump housing space requirements valve requirements variable speed control. |
Installation requirements may include: | pipe connection: bedding and backfilling corrosion cover ground stability impact level of workmanship manufacturer recommendations pipe support provision for pipe movement serviceability and access. |
Applications: | may include: agricultural crops garden irrigation golf courses greenhouses lawn watering local government parks nurseries sports ovals should also cover: individual crop water requirements types of plants and their respective crop factors. |
Delivery systems and layout may include: | main delivery number and design of control stations design includes: avoiding obstacles irregular shapes minimising water wastage range of irrigation applications range pipes ring mains size and water delivery of sprinklers sprinkler head patterns and placement. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resources may include: selecting appropriate material to ensure minimal environmental impact efficient use of material efficient energy usage/capital outlay comparison water efficiency reuse of water, such as rainwater, grey water and recycled non-drinking water consideration of the Green Building Council of Australia rating scheme. |
Plans: | may include: axonometrics cross-sections details elevations isometrics schematics sections may be produced using: computer generation drawing equipment. |
Specification may include: | bedding flow requirements irrigation management control system jointing manufacturer requirements materials pumps residual pressures safety (WHS) specialised components sprinkler head selection storage tanks support testing valve selection water treatment workmanship. |
Testing may include: | defect inspection hydrostatic mains pressure performance quality assurance (QA) audit. |
Commissioning schedule may include: | system certification flow test leak check pressure test system purge system defect system functions as per design valve and system operation. |
Operation and maintenance manual includes: | as installed drawings results of commissioning test certification documentation maintenance schedules manufacturer brochures and technical information operational procedures valve function. |