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 specificationssizing and documenting layout irrigation systems and documenting layout irrigation systems for applications, including residential, sporting and agricultural propertiesmay be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements must include: | architectural plansbackflow requirementsinterpretation and application of irrigation services, drawings and symbolsirrigation management systemowner requirementsprecipitation and evaporation ratespumping requirementsrequired water application to establish and maintain plant lifesource of irrigation watersprinkler head spacingssystem requirementswater 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 projectmay include:design stylesexpected design lifelabour costsmaterial costsrequired water application to establish and maintain plant lifesafety factorsspeed of installationsuitability of materialssystem choicesuse 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 requirementsAS/NZS3500 National plumbing and drainageAS2200 Design charts for water supply and sewerageNational Construction Codestate or territory health department requirementsother relevant Australian standards or codes. |
Manufacturer requirements may include: | irrigation management systemmaterial specificationspump tablessprinkler head performancesub-surface irrigationtechnical and trade manuals. |
Desktop study may include collection and interpretation of data for design purposes in: | architectural and building planssite layout plans, which may include:sports ovalsgolf coursesresidential, commercial, industrial and agricultural propertieslocal government parksmanufacturer datadocuments, which may include:applicationsbrochuresformspoliciesother reports as available. |
Flow and pressure tests may include: | interpretation of flow and pressure testson-site measurement of flows (l/s), velocity (m/s) and pressure (kPa). |
Water sources, volumes and areas to be irrigated may include: | sources:drinking waternon-drinking (recycled) waterrain watergrey watercreeksdamslakesriversstreamstanksother approved water sourcesvolumes and areas:amount and duration of water supplyareas to be irrigatednumber of control stations requiredtotal amount and flow rate required for each control station. |
Soil types may include: | gravelslight, medium and heavy claysloamsrocksands. |
Performance requirements may include: | flow, velocity, pressure and discharge requirements, established using relevant Australian standards, codes and manufacturer informationrequired water application to establish and maintain plant life. |
Layout of pipework systems: | may include:distributiondual feed systemsrange pipesring mainsingle pipecontrol stationsshould not unduly affect aesthetic appeal and building integrityshould have principles of economy, serviceability, durability and fit for use applied. |
Fittings, valves and controls may include: | fittings:bendselbowssprinkler headsteesunionsvalves:backflow preventionexcess pressureisolatingpressure limitingpressure reductionstrainerscontrols:irrigation management systemcontrol stationscontrol wiringnodes. |
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 devicesmay be located as:individual protectionzone protectioncontainment protection. |
Materials may include: | composite pipeworkcopper (Cu)cross-linked polyethylene (PE-X)polypropylene (PP)polybutylene (PB)polyvinyl chloride (PVC)other relevant materials. |
Jointing methods include: | brazingcompressionelectrofusion weldingflaringmechanical jointsrubber ring jointsscrewingsolderingother 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 timingmanifold systems:manifolds to stations, headers, branches, timers, isolators, servo valves, electronics, power supplies and manual activationsensors:moisture sensors, soil sensors, temperature sensors, humidity sensors, weather stations and computer automationautomatic controls:station controllers, servo valves, isolating valves, water tractors and timerssprinklers, 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 systemssprinkler patterns:head to head, square, triangular, circular, quarter overlap, half overlap, full overlap, double overlap and other overlap patterns. |
Pipe supports may include: | thrust blocksbeddingbracket spacingcorrosion protectioncovermanufacturer-recommended specific fixingsmaterial requirementsprovision for pipe movement. |
Pump enclosure and control requirements may include: | acoustic performanceautomatic change-overautomatic controlsdual-pump provisionimpeller sizinginlet and outlet design requirementsinstallation and mounting requirementsirrigation management control systempressure gaugespump contolspump selectionpump sizingpump housingspace requirementsvalve requirementsvariable speed control. |
Installation requirements may include: | pipe connection:bedding and backfillingcorrosioncoverground stabilityimpactlevel of workmanshipmanufacturer recommendationspipe supportprovision for pipe movementserviceability and access. |
Applications: | may include:agricultural cropsgarden irrigationgolf coursesgreenhouseslawn wateringlocal government parksnurseriessports ovalsshould also cover:individual crop water requirementstypes of plants and their respective crop factors. |
Delivery systems and layout may include: | main deliverynumber and design of control stationsdesign includes:avoiding obstaclesirregular shapesminimising water wastagerange of irrigation applicationsrange pipesring mainssize and water delivery of sprinklerssprinkler head patterns and placement. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resourcesmay include:selecting appropriate material to ensure minimal environmental impactefficient use of materialefficient energy usage/capital outlay comparisonwater efficiencyreuse of water, such as rainwater, grey water and recycled non-drinking waterconsideration of the Green Building Council of Australia rating scheme. |
Plans: | may include:axonometricscross-sectionsdetailselevationsisometricsschematicssectionsmay be produced using:computer generationdrawing equipment. |
Specification may include: | beddingflow requirementsirrigation management control systemjointingmanufacturer requirementsmaterialspumpsresidual pressuressafety (WHS)specialised componentssprinkler head selectionstorage tankssupporttestingvalve selectionwater treatment workmanship. |
Testing may include: | defect inspectionhydrostaticmains pressureperformancequality assurance (QA) audit. |
Commissioning schedule may include: | system certificationflow testleak checkpressure testsystem purgesystem defectsystem functions as per designvalve and system operation. |
Operation and maintenance manual includes: | as installed drawingsresults of commissioning testcertification documentationmaintenance schedulesmanufacturer brochures and technical informationoperational proceduresvalve function. |