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:interpreting plans and specificationssizing and documenting layout of vacuum sewage systems, including residential, commercial and industrialmay be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements must include: | acoustic performancearchitectural plansbuilding specificationsfire safety requirementsflow requirements and sizing of pipeworkodour controlowner requirementspipework identificationSewerage Code of Australiavacuum pumping stationventilation requirements. |
Vacuum sewerage system attributes must include: | availabilitycostflexibilityinstallation requirementslow water usageriskssewerage loadingsite conditions. |
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:energy costsexpected design lifelabour costsmaterial costssafety factorsspeed of installationsuitability of design. |
Statutory and regulatory requirements and relevant Australian standards and codes may include: | Acts, regulations and commonwealth, state or territory, and local government requirements Sewerage Code of AustraliaAS/NZS3500 National plumbing and drainageAS2200 Design charts for water supply and sewerage Environmental Protection Authority (EPA)National Construction Codeother relevant Australian standards or codes. |
Manufacturer requirements may include: | material specificationscollection and storage systemsdesign and installationequipment installationpump installationselection of compatible sanitary fixturestechnical manuals. |
Desktop study may include collection and interpretation of data for design purposes in: | architectural and building plansdeveloper plansmanufacturer datadocuments, which may include:applicationsbrochuresformspolicies sewer detail mapsother reports as available. |
Performance requirements may include: | discharge requirementsdurabilityemergency storage and/or power backuplongevitynoise levelself-cleaning abilitysufficient capacity. |
Layout of pipework systems: | sewer infrastructure systems must include consideration of:covergradelocation of vacuum pump stationlocation vacuum sewage collection chambersodour controlpipe accessventilationhigh-rise building projects must include consideration of:acoustic performanceamenity of the buildingclipping and pipe supportlocation of pipework (fire rating of enclosure)function of the buildingimpingement on floor heightsmaterials to be usedsize of penetrationstype of building structureshould not unduly affect building integrity and aesthetic appealshould include principles of economy, serviceability, durability and fit for use should be applied. |
Fittings, valves and controls include: | fittings:bendselbowsinspection and maintenance accessteesunionsvalves:backflow preventionisolatingnon-returnstrainersvacuum diaphragm valvecontrols:pneumatic control switch assemblyvacuum management system. |
Pipe size calculations must include: | determining flow and fixture loadingsEP densitycalculating gradientinterpreting design charts and tablesdetermining self-cleaning velocitiesmanufacturer requirementsprobable simultaneous demand. |
Pipe supports may include: | beddingbracket spacingconcrete supportcorrosion protectioncoverhanging bracketsmanufacturer-recommended specific fixingsmaterial requirementsprovision for expansionthrust blockswall and ceiling brackets. |
Vacuum pumping station and pump control requirements may include: | access coversautomatic controlscapacitycorrosion-resistant materialsdetailingemergency storageemergency power supplyhigh and low-level water controls and alarmsimpeller sizinginlet and outlet design requirementsinstallation and mounting requirementsmacerator requirementsodour controlpneumatic control switch assemblypump selectionpump sizingpumpwell sizingspace requirementsvacuum pump systemsvalve requirementsventilationwarning system. |
Materials: | appropriate materials specified based on:compatibilitycost effectivenessdurabilityfit for purposemay include:copper (Cu)polyethylene (PE)polypropylene (PP)polyvinyl chloride (PVC)stainless steelother approved material. |
Jointing methods may include: | brazingelectrofusion weldingflangedmechanical jointsrubber ringsolvent cement weldingthreading. |
Installation requirements may include: | acoustic performancebeddingpipe protection, which may include:covercorrosionimpactgradelevel of workmanship.fire ratingmanufacturer-recommended specific fixingspipe supportprovision for pipe movement serviceability and access. |
Computer software packages may 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 materialcapital outlay/energy usage comparison positive effect on the environment in regard to no potential overflow or leakagewater efficientconsideration of the Green Building Council of Australia rating schemelocal environment consideration overflow disposal/reuse. |
Plans: | may include:axonometricscross-sectionsdetailselevationsisometricsschematicssitesectionsmay be produced using:computer generation drawing equipment. |
Specification includes: | access chambers (manholes)beddingcommissioningconcrete support and detailing specialised componentsjointingmanufacturer requirementsmaterialsodour controlpump rising mainsafety (WHS)selection of compatible sanitary fixturessupporttesting vacuum pump stationvacuum sewage collection chambersvacuum sewer mainsventilationworkmanship. |
Testing may include: | compressed air testflow testinghydrostatic testinspection checklistperformancevacuumquality assurance (QA) audit. |
Commissioning schedule must include: | system certificationcheck for foreign materialchecking leaksemergency proceduressystem defectssystem functions as per design. |
Operation and maintenance manual includes: | as installed drawingsresults of commissioning testcertification documentationmaintenance schedulesmanufacturer brochures and technical informationoperating procedures. |