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 of grey water re-use systems for residential, commercial and industrial applications to include water treatment and backflow protection of drinking and non-drinking water supply systemsmay be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements must include: | architectural plansbuilding specificationsowner requirementspipework identificationsizing of pipeworkbackflow protection of drinking and non-drinking water supply systemswater treatmentspecialist water use applications. |
Health and environmental risks include: | health risks, which may include:abdominal painacute enteritisbacillary dysenterychest paincholeracommon coldscoughingdiarrhoeadigestive and nutritional disturbancesdysenteryfevergastroenteritisgiardiasishelminthes, including flukes and wormshepatitishookworm diseaseinfectious hepatitismeningitismuscle achesneurological symptoms, including nervousness and insomniapoliomyelitisrespiratory infections, such as pneumoniarestlessnesssalmonellosis (food poisoning)taeniasistoxoplasmosistyphoid fevervomitingweight lossenvironmental risks, which may include:algal bloomsexcess nutrient loadsfish killsoxygen depletion. |
Measures to protect public health must include: | auditingcontact avoidancecontact minimisationdisinfection and sterilisationeducationlegislationlicensingmaintenanceseparation barriersset back distancestiming dischargeswet weather storage. |
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, such as suitable treatment, disposal options and disinfection optionswater savings and environmental benefits compared to initial and ongoing maintenance costs. |
National water programs, statutory and regulatory requirements, relevant Australian standards, and codes may include: | Acts and regulationsAustralian standard requirements, including:AS/NZS1546 On-site domestic wastewater treatment unitsAS/NZS1547 On-site domestic wastewater managementAS/NZS3500 National plumbing and drainageAS2200 Design charts for water supply and sewerageNational Construction Code commonwealth, state or territory government policies, including health departments. |
Manufacturer requirements must include: | material specificationsgrey water treatment systemspump installationpipe sizingstorage systemstechnical and trade manuals. |
Desktop study may include collection and interpretation of data for design purposes in: | architectural and building plansdeveloper plansmanufacturer dataother documents, including:applicationsbrochuresformspoliciesother reports as available. |
Performance requirements may include: | compliance limits for:bacteria levelschlorine levelsnutrientspHphosphatesrequirements established using relevant Australian standards, codes and local authority plans, including:coverdischargeflow conditionspipe grades. |
Layout of pipework systems: | may include:drainage systemselevated pipework systemsgravity systemspumped and rising mainsstack systems, may include:fully ventedfully vented modifiedsingle stacksingle stack modifiedwaste stacktwo-pipe systemreduced velocity aerator systemshould not unduly affect building integrity and aesthetic appealincludes location of pipework (fire rating of enclosure)should demonstrate principles of economy, serviceability, durability and fit for use. |
Fittings, valves and controls must include: | backflow prevention devicesirrigation control systemsisolating valveslevel indicatorspump controls. |
Land application options may include: | surface irrigationsubsurface irrigationspray irrigation. |
Storage tanks may include: | connectionscontainmentlocationmaterialoverflow provisionpumpssizingsupportswitchesvalvesvermin control. |
Pipe size and pump duty calculations may include: | calculating pipe sizingcalculating pressure and flow requirementsdetermining flow and fixture loadingsinterpreting design charts and tables. |
Pumpwell, pump and pump control requirements may include: | automatic controlscapacitycorrosion-resistant materialsdetailinghigh and low-level water controls and alarmsinlet and outlet design requirementsinstallation and mounting requirementsmacerator requirementspump sizingpumpwell sizingselection of pump typevalve requirementswarning system. |
Materials may include: | copper (Cu)polypropylene (PP)polybutylene (PB)polyethylene (PE)unplasticised polyvinyl chloride (PVC-U)other approved material. |
Jointing methods may include: | brazingcompression jointselectrofusion weldingmechanical jointssolvent cementthreadingother approved jointing methods. |
Pipe supports include: | anchorsbeddingbracket spacingconcrete supportcorrosion protectionmanufacturer-recommended specific fixingsmaterial requirementsprovision for expansionsaddles. |
Installation requirements may include: | pipe protection, which may include:covercorrosionimpactfire ratinglevel of workmanshipmanufacturer-recommended specific fixingspipe supportprovision for expansionserviceability and access. |
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 comparisonlocal environment considerationwater efficiencyreuse of greywaterconsideration of the Green Building Council of Australia rating scheme. |
Plans: | may include:axonometricselevationsdetailscross-sectionsisometricssectionsschematics, which may be produced using:computer generationdrawing equipment. |
Specification may include: | backflow preventionflow requirementsjointingmanufacturer requirementsmaterialsresidual pressuressafety (WHS)specialised componentsstoragesupporttestingvalve selectionwater treatmentworkmanship. |
Testing may include: | air pressurebackflow protectiondefect inspectiondrainage inspectionhydrostaticperformance:flowpressurewater qualityquality assurance (QA) audit. |
Commissioning schedule may include: | balancing disposal systemflow and pressure adjustmentsleak checkpump settingspressure testsafety requirementssystem certificationsystem flushingsystem defectssystem functions as per designsystem purgevalve operationventilationvermin control. |
Operation and maintenance manual may include: | as installed drawingscertification documentationland application compliance checksmaintenance schedulesmanufacturer brochuresongoing maintenance requirementspump maintenanceregular inspectionsresults of commissioning testsafety management systemsurface ponding checkssystem detail, setting and operationsvalve functionsystem operational parameter adjustments and checks, including:chlorine levelsdissolved oxygennitratespHphosphatessuspended solidswater quality. |