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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. |
Scope of work: | includes: interpretation of plans and specifications rainfall analysis sizing and documenting layout of rainwater harvesting systems for applications, including residential, commercial and industrial volume calculations may be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements include: | architectural specifications builder specifications owner requirements specialist water use applications. |
Contamination includes: | bacterial heavy metal inorganic odour organic taste viral. |
Cost-benefit analysis includes: | comparison of range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of project. |
Statutory, regulatory requirements and Australian and New Zealand standards include: | Acts and regulations AS/NZS3500 National plumbing and drainage set AS2200 Design charts for water supply and sewerage Building Code of Australia local and state government policies, including group and strata titling. |
Manufacturer requirements include: | material specifications pump tables sizing tables technical and trade manuals. |
Desktop study includes collection and interpretation of existing data for design purposes from: | architectural and building plans council plans developer plans manufacturers' data other documents, including: applications forms sewer detail maps other reports as available. |
Performance requirements include: | pipe grades, cover, flow conditions and discharge requirements, established using Australian and New Zealand standards and local authority plans. |
Tank type and location include: | tank type: coloured steel concrete fibreglass galvanised steel plastic polyethylene other approved materials tank location: above-ground in-ground reduced levels site plan. |
Layout of pipework systems: | includes: gravity systems pumped systems should not unduly affect building integrity and aesthetic appeal should have principles of economy, serviceability, durability and fit for use applied. |
Fittings and valves include: | backflow prevention devices bends inspection openings isolating valves junctions. |
First-flush systems include: | electronic float-activated manual mechanical time-activated volume-activated. |
Strainers include: | downpipe gutter point of use pump inlet pump outlet tank inlet tank outlet tap. |
Water contamination solutions include: | chlorination disinfection filters ozone reverse osmosis screens strainers ultraviolet. |
Pipe size and pipe grade calculations include: | determination of flow gradient calculations interpretation of design charts and tables pipe sizing calculations reduced level calculations. |
Pipe fixings include: | anchors bedding bracket spacing concrete support corrosion protection cover hanging brackets material requirements saddles wall and ceiling brackets. |
Materials include: | concrete copper fittings and fixtures high density polyethylene (HDPE) low density polyethylene (LDPE) unplasticised polyvinyl chloride (PVC-U). |
Jointing methods include: | brazing compression gluing mechanical joints solvent cement threading welding. |
Pump and pump control requirements include: | automatic controls capacity corrosion-resistant materials detailing high and low-level water controls and alarms impeller sizing inlet and outlet design installation mounting pump selection and pump sizing, which is based on: flow velocity lift pressure requirements valve warning system. |
Installation requirements include: | bedding clipping concrete support independent anchoring of above-ground and in-ground tanks installation details jointing level of workmanship. |
Rainwater re-use systems include: | irrigation applications laundry applications potable re-use toilet flushing wash-down applications. |
Plans include: | axonometrics cross-sections details elevations isometrics schematics, which may be produced using: pencil Indian ink pigment liner computer generation sections. |
Specification includes: | bedding clipping concrete support detailing specialised components jointing manufacturer requirements materials workmanship. |
Testing includes: | air pressure test hydrostatic test quality assurance (QA) audit. |
Commissioning schedule includes: | flow adjustments flushing system leak check pressure testing pump adjustments water filling in-ground tanks. |
Operation and maintenance manual includes: | cleaning filters and strainers disinfection of storage tanks leak detection pump maintenance regular maintenance requirements water auditing yearly inspections. |