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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 work contract administration documentation initial survey invitation to tender preparation of plans. |
Scope of work: | includes: interpretation of plans and specifications sizing and documenting layout of sewer systems for residential, commercial and industrial applications may be for either new projects or existing sewer mains being renovated, extended, restored or maintained. |
Design requirements include: | architectural specifications builder specifications owner requirements specialist 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 titling AS/NZS3500 National plumbing and drainage set: Parts 2.1 and 2.2 AS2200 Design charts for water supply and sewerage Building Code of Australia. |
Manufacturer requirements include: | material specifications pump tables sizing tables technical and trade manuals. |
Desktop study includes collecting and interpreting existing data for design purposes from: | architectural and building plans council plans developer plans other documents, including: forms applications sewer detail maps other reports as available. |
Safety procedures and regulations for trench safety: | include: analysing factors that determine tunnelling assessing and identifying types of soil requiring tunnel excavation and shoring procedures defining methods of trench installation defining procedures for trench rescue specify safety procedures with reference to: advisory standards compliance standards industry standards Occupational Health and Safety Act OHS regulations other 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 requirements durability longevity self-cleaning ability sufficient capacity. |
Trenching safety procedures include: | conditions affecting trench stability condition of soils disturbed by previous excavations effect of water on excavations effects of moisture content on excavated trenches traffic and vibrations confined space safety requirements, e.g. for exhaust emissions prevention of trench collapse trench collapse procedures trench inspection procedures trench excavation methods used for different: backfilling methods bedding methods depth slope support systems types. |
Layout of pipework systems include: | gravity systems pumped and rising mains layout, which should: not unduly affect building integrity and aesthetic appeal have principles of economy, serviceability, durability and fit for use applied. |
Fittings and valves include: | access openings bends junctions. |
Pipelaying may include: | cutting, handling and storage procedures for each pipe material fittings used for sewerage work jointing methods and procedures for each material laying procedures for pipework of varying sizes methods of dewatering trenches before and during pipelaying methods of grading and maintaining pipe direction and reduced levels methods of placing bedding materials, encasing pipes, backfilling and compacting methods of testing sewer and branch sewer drains. |
Pipe size, pipe grade and ventilation requirement calculations include: | determination of flow and loadings gradient calculations interpretation of design charts and tables pipe sizing calculations projected flows stormwater infiltration reduced level calculations. |
Manhole details include: | benching requirements connections to and from flow and gradient requirements inspection chambers lids open and closed channel sizing. |
Pump station, pump and pump control requirements include: | automatic controls capacity chains corrosion-resistant materials detailing high and low-level water controls and alarms impeller sizing inlet and outlet design requirements installation and mounting requirements ladder access macerator requirements pump selection pump sizing pump station sizing space requirements step irons valve requirements warning system. |
Materials include: | cast iron concrete earthenware high density polyethylene (HDPE) unplasticised polyvinyl chloride (PVC-U). |
Jointing methods include: | gluing mechanical joints rubber ring solvent cement welding threading. |
Installation requirements include: | bedding clipping concrete support installation details jointing requirements level of workmanship. |
Rising main systems include: | approved pressure pipe and fittings calculated rise and pump delivery requirements pump sizing to meet calculated flow conditions. |
Computer software packages include: | manufacturers' software proprietary design software. |
Plans: | may include: axonometrics cross-sections details elevations isometrics schematics sections may be produced to industry standards and in accordance with regulatory and manufacturer requirements using: computer generation Indian ink pencil pigment liner. |
Specification may include: | bedding clipping concrete support descriptions details of specialised components jointing manholes manufacturer requirements materials workmanship. |
Testing may include: | air pressure test hydrostatic test quality assurance (QA) audit visual and site inspection. |
Commissioning schedule includes: | checking leaks flushing. |
Operation and maintenance manual may include: | check for blockages leak detection pump maintenance water auditing yearly inspection yearly maintenance requirements. |