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 specifications sizing and documenting layout of sewer infrastructure systems may be for either new projects or existing sewer mains being extended. |
Design requirements may include: | architectural plans builder specifications Sewerage Code of Australia fire safety requirements owner requirements pipework identification flow requirements and sizing of pipework ventilation 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 project may include: design styles energy costs expected design life labour costs material costs safety factors speed of installation suitable materials. |
Statutory and regulatory requirements and relevant Australian standards and codes may include: | Acts, regulations and commonwealth, state or territory, and local government policies AS/NZS3500 National plumbing and drainage AS2200 Design charts for water supply and sewerage Environmental Protection Authority (EPA) National Construction Code Sewerage Code of Australia other relevant Australian standards and codes. |
Manufacturer requirements may include: | material specifications collection and storage systems design and installation equipment installation pump installation technical manuals. |
Desktop study may include collection and interpretation of data for design purposes, such as: | architectural and building plans developer’s plans equivalent population (EP) density manufacturer’s data other documents, including: forms brochures applications policies regulations other reports as available. |
Safety procedures and regulations for trench safety: | may 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 Work Health and Safety Act other Acts, codes or regulations relating to trenching working in confined spaces. |
Performance requirements are established using relevant Australian standards, codes and local authorities’ requirements may include: | discharge requirements durability emergency storage backup longevity self-cleaning ability sufficient capacity. |
Trenching safety procedures may 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 may include: | gravity pumped and rising mains vacuum identification of easements and location for sewer infrastructure systems, including pumping rising mains layout, which must: not unduly affect building integrity and aesthetic appeal have principles of economy, serviceability, durability and fit for use applied. |
Fittings, valves and controls may include: | fittings, including: bends flanges junctions inspection openings unions valves, including: non-return isolation controls, including: level alarms management communication systems. |
Pipelaying may include: | cutting, handling and storage procedures fittings used for sewerage work jointing methods and procedures laying procedures for pipework methods of dewatering trenches methods of grading and maintaining pipe direction and reduced levels methods of placing bedding materials, encasing pipes, backfilling and compacting methods of testing sewer drains methods of pressure testing pump rising mains. |
Pipe size, pipe grade and ventilation requirement calculations may include: | determination of flow and loadings gradient calculations equivalent population (EP) density interpretation of design charts and tables pipe sizing calculations projected flows pumping flow rates reduced level calculations self-cleaning pipe velocities stormwater infiltration system ventilation. |
Access chamber details must include: | access benching connections covers flow and gradient open and closed channel sizing. |
Pump station, pumps, controls and equipment requirements may include: | access covers access ladders automatic controls capacity corrosion-resistant materials emergency storage and power supply impeller sizing and selection inlet and outlet design installation and mounting odour control macerator requirements management communication system provision for servicing pump selection pumpwell sizing space requirements valves ventilation warning system. |
Materials may include: | cast iron (CI) concrete vitrified clay pipes (VCP) polyethylene (PE) polypropylene (PP) unplasticised polyvinyl chloride (PVC-U) other approved material. |
Jointing methods may include: | electrofusion welding mechanical joints rubber ring solvent cement welding other approved jointing methods. |
Installation requirements may include: | bedding pipe protection, which may include: cover corrosion impact level of workmanship manufacturer-recommended specific fixings pipe support provision for pipe movement serviceability and access. |
Rising main systems may include: | approved pressure pipe and fittings calculated rise and pump delivery requirements environmental protection pump sizing to meet calculated flow conditions self-cleaning pipe velocities odour control. |
Computer software packages include: | manufacturer software proprietary design software. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resources may include: selecting appropriate material to ensure minimal environmental impact efficient use of material efficient energy usage/capital outlay comparison consideration of the Green Building Council of Australia rating scheme. |
Plans: | may include: axonometrics cross-sections details elevations isometrics schematics site sections may be produced using: computer generation drawing equipment. |
Specification may include: | bedding commissioning excavation requirements support concrete support and detailing specialised components jointing access chambers (manholes) manufacturer requirements materials piping pumps pumping stations safety (WHS) testing workmanship. |
Testing may include: | air pressure drainage inspection hydrostatic performance compliance with authorities discharge requirements quality assurance (QA) audit. |
Commissioning schedule must include: | system certification check for foreign material containment leak check operational pumping system defects system functions as per design ventilation odour control WHS compliance. |
Operation and maintenance manual may include: | as installed drawings certification documentation emergency procedures results of commissioning test maintenance schedules manufacturer brochures and technical information odour control WHS requirements ventilation. |