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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. |
Sewer contracting procedures include: | acceptance of workcontract administrationdocumentationinitial surveyinvitation to tenderpreparation of plans. |
Scope of work: | includes:interpretation of plans and specificationssizing and documenting layout of sewer systems for residential, commercial and industrial applicationsmay be for either new projects or existing sewer mains being renovated, extended, restored or maintained. |
Design requirements include: | architectural specificationsbuilder specificationsowner requirementsspecialist applications. |
Cost-benefit analysis includes: | comparison of range of suitable materials and system choices available to enable cost-effective choices to be made without compromising the integrity of the project. |
Statutory and regulatory requirements and Australian and New Zealand standards include: | Acts, regulations and local and state government policies, including group and strata titlingAS/NZS3500 National plumbing and drainage set: Parts 2.1 and 2.2AS2200 Design charts for water supply and sewerageBuilding Code of Australia. |
Manufacturer requirements include: | material specificationspump tablessizing tablestechnical and trade manuals. |
Desktop study includes collecting and interpreting existing data for design purposes from: | architectural and building planscouncil plansdeveloper plansother documents, including:formsapplicationssewer detail mapsother reports as available. |
Safety procedures and regulations for trench safety: | 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 standardsOccupational Health and Safety ActOHS regulationsother Acts, codes or regulations relating to trench protection. |
Performance requirements are established using Australian and New Zealand standards and local authority plans and may include: | discharge requirementsdurabilitylongevityself-cleaning abilitysufficient capacity. |
Trenching safety procedures 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 include: | gravity systemspumped and rising mainslayout, which should:not unduly affect building integrity and aesthetic appealhave principles of economy, serviceability, durability and fit for use applied. |
Fittings and valves include: | access openingsbendsjunctions. |
Pipelaying may include: | cutting, handling and storage procedures for each pipe materialfittings used for sewerage workjointing methods and procedures for each materiallaying procedures for pipework of varying sizesmethods of dewatering trenches before and during pipelayingmethods of grading and maintaining pipe direction and reduced levelsmethods of placing bedding materials, encasing pipes, backfilling and compactingmethods of testing sewer and branch sewer drains. |
Pipe size, pipe grade and ventilation requirement calculations include: | determination of flow and loadingsgradient calculationsinterpretation of design charts and tablespipe sizing calculationsprojected flowsstormwater infiltration reduced level calculations. |
Manhole details include: | benching requirementsconnections to and fromflow and gradient requirementsinspection chamberslidsopen and closed channelsizing. |
Pump station, pump and pump control requirements include: | automatic controlscapacitychainscorrosion-resistant materialsdetailinghigh and low-level water controls and alarmsimpeller sizinginlet and outlet design requirementsinstallation and mounting requirementsladder accessmacerator requirementspump selectionpump sizingpump station sizingspace requirementsstep ironsvalve requirementswarning system. |
Materials include: | cast ironconcreteearthenwarehigh density polyethylene (HDPE)unplasticised polyvinyl chloride (PVC-U). |
Jointing methods include: | gluingmechanical jointsrubber ringsolvent cement weldingthreading. |
Installation requirements include: | beddingclippingconcrete supportinstallation detailsjointing requirementslevel of workmanship. |
Rising main systems include: | approved pressure pipe and fittingscalculated rise and pump delivery requirementspump sizing to meet calculated flow conditions. |
Computer software packages include: | manufacturers' softwareproprietary design software. |
Plans: | may include:axonometricscross-sectionsdetailselevationsisometricsschematicssectionsmay be produced to industry standards and in accordance with regulatory and manufacturer requirements using:computer generationIndian inkpencilpigment liner. |
Specification may include: | beddingclippingconcrete supportdescriptionsdetails of specialised componentsjointingmanholesmanufacturer requirementsmaterialsworkmanship. |
Testing may include: | air pressure testhydrostatic testquality assurance (QA) auditvisual and site inspection. |
Commissioning schedule includes: | checking leaksflushing. |
Operation and maintenance manual may include: | check for blockagesleak detectionpump maintenancewater auditingyearly inspectionyearly maintenance requirements. |