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 sewer infrastructure systems may be for either new projects or existing sewer mains being extended. |
Design requirements may include: | architectural plansbuilder specificationsSewerage Code of Australiafire safety requirementsowner requirementspipework identificationflow requirements and sizing of pipeworkventilation requirements. |
Cost-benefit analysis: | compares the range of suitable materials and system choices available to enable cost-effective choices to be made without compromising the integrity of the projectmay include:design stylesenergy costsexpected design lifelabour costsmaterial costssafety factorsspeed of installationsuitable materials. |
Statutory and regulatory requirements and relevant Australian standards and codes may include: | Acts, regulations and commonwealth, state or territory, and local government policiesAS/NZS3500 National plumbing and drainageAS2200 Design charts for water supply and sewerageEnvironmental Protection Authority (EPA)National Construction CodeSewerage Code of Australiaother relevant Australian standards and codes. |
Manufacturer requirements may include: | material specificationscollection and storage systemsdesign and installationequipment installationpump installationtechnical manuals. |
Desktop study may include collection and interpretation of data for design purposes, such as: | architectural and building plansdeveloper’s plansequivalent population (EP) densitymanufacturer’s dataother documents, including:formsbrochuresapplicationspoliciesregulationsother reports as available. |
Safety procedures and regulations for trench safety: | may include:analysing factors that determine tunnellingassessing and identifying types of soil requiring tunnel excavation and shoring proceduresdefining methods of trench installationdefining procedures for trench rescuespecify safety procedures with reference to:advisory standardscompliance standardsindustry standardsWork Health and Safety Actother Acts, codes or regulations relating to trenchingworking in confined spaces. |
Performance requirements are established using relevant Australian standards, codes and local authorities’ requirements may include: | discharge requirementsdurabilityemergency storage backuplongevityself-cleaning abilitysufficient capacity. |
Trenching safety procedures may include: | conditions affecting trench stabilitycondition of soils disturbed by previous excavationseffect of water on excavationseffects of moisture content on excavated trenchestraffic and vibrationsconfined space safety requirements, e.g. for exhaust emissionsprevention of trench collapsetrench collapse procedurestrench inspection procedurestrench excavation methods used for different:backfilling methodsbedding methodsdepthslopesupport systemstypes. |
Layout of pipework systems may include: | gravity pumped and rising mainsvacuumidentification of easements and location for sewer infrastructure systems, including pumping rising mains layout, which must:not unduly affect building integrity and aesthetic appealhave principles of economy, serviceability, durability and fit for use applied. |
Fittings, valves and controls may include: | fittings, including:bendsflangesjunctionsinspection openingsunionsvalves, including:non-returnisolationcontrols, including:levelalarmsmanagement communication systems. |
Pipelaying may include: | cutting, handling and storage procedures fittings used for sewerage workjointing methods and procedures laying procedures for pipework methods of dewatering trenches methods of grading and maintaining pipe direction and reduced levelsmethods of placing bedding materials, encasing pipes, backfilling and compactingmethods of testing sewer drainsmethods of pressure testing pump rising mains. |
Pipe size, pipe grade and ventilation requirement calculations may include: | determination of flow and loadingsgradient calculationsequivalent population (EP) densityinterpretation of design charts and tablespipe sizing calculationsprojected flowspumping flow ratesreduced level calculationsself-cleaning pipe velocitiesstormwater infiltrationsystem ventilation. |
Access chamber details must include: | accessbenching connections coversflow and gradient open and closed channelsizing. |
Pump station, pumps, controls and equipment requirements may include: | access coversaccess laddersautomatic controlscapacitycorrosion-resistant materialsemergency storage and power supplyimpeller sizing and selectioninlet and outlet designinstallation and mountingodour controlmacerator requirementsmanagement communication systemprovision for servicingpump selectionpumpwell sizingspace requirementsvalvesventilationwarning system. |
Materials may include: | cast iron (CI)concretevitrified clay pipes (VCP)polyethylene (PE)polypropylene (PP)unplasticised polyvinyl chloride (PVC-U)other approved material. |
Jointing methods may include: | electrofusion weldingmechanical jointsrubber ringsolvent cement weldingother approved jointing methods. |
Installation requirements may include: | beddingpipe protection, which may include:covercorrosionimpactlevel of workmanshipmanufacturer-recommended specific fixingspipe support provision for pipe movementserviceability and access. |
Rising main systems may include: | approved pressure pipe and fittingscalculated rise and pump delivery requirementsenvironmental protectionpump sizing to meet calculated flow conditionsself-cleaning pipe velocitiesodour control. |
Computer software packages include: | manufacturer softwareproprietary design software. |
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 comparisonconsideration of the Green Building Council of Australia rating scheme. |
Plans: | may include:axonometricscross-sectionsdetailselevationsisometricsschematicssitesectionsmay be produced using:computer generationdrawing equipment. |
Specification may include: | beddingcommissioningexcavation requirementssupportconcrete support and detailing specialised componentsjointingaccess chambers (manholes)manufacturer requirementsmaterialspipingpumpspumping stationssafety (WHS)testingworkmanship. |
Testing may include: | air pressure drainage inspectionhydrostatic performancecompliance with authorities discharge requirementsquality assurance (QA) audit. |
Commissioning schedule must include: | system certificationcheck for foreign materialcontainmentleak checkoperationalpumpingsystem defectssystem functions as per designventilationodour controlWHS compliance. |
Operation and maintenance manual may include: | as installed drawingscertification documentationemergency proceduresresults of commissioning testmaintenance schedulesmanufacturer brochures and technical informationodour controlWHS requirementsventilation. |