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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 sizing and documenting layout of grey water re-use systems for applications, including residential, commercial and industrial 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. |
Health and environmental risks include: | health risks: abdominal pain acute enteritis anaemia anorexia bacillary dysentery chest pain cholera common colds coughing diarrhoea digestive and nutritional disturbances dysentery fever gastroenteritis giardiasis helminthes, including flukes and worms hepatitis hookworm disease infectious hepatitis meningitis muscle aches neurological symptoms, including nervousness and insomnia poliomyelitis respiratory infections, such as pneumonia restlessness salmonellosis (food poisoning) taeniasis toxoplasmosis typhoid fever vomiting weight loss environmental risks: algal blooms excess nutrient loads fish kills oxygen depletion. |
Measures to protect public health include: | auditing contact avoidance contact minimisation disinfection and sterilisation education legislation licensing maintenance separation barriers set back distances timing discharges wet weather storage. |
Cost-benefit analysis includes: | comparison of range of suitable treatment, disposal options, materials, system choices and disinfection options water savings and environmental benefits compared to initial and ongoing maintenance costs. |
National water programs, statutory and regulatory requirements, and Australian and New Zealand standards include: | Acts and regulations Australian and New Zealand standard requirements, including: AS/NZS1546 On-site domestic wastewater treatment units AS/NZS1547 On-site domestic wastewater management AS/NZS3500 National plumbing and drainage set AS2200 Design charts for water supply and sewerage BCA 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 brochures forms policies other reports as available. |
Performance requirements include: | compliance limits for: bacteria levels chlorine levels nutrients pH phosphates requirements established using Australian and New Zealand standards and local authority plans, including: cover discharge flow conditions pipe grades. |
Layout of pipework systems: | includes: drainage systems elevated pipework systems gravity systems pumped and rising mains stack systems, including: fully vented fully vented modified single stack single stack modified should not unduly affect building integrity and aesthetic appeal should have principles of economy, serviceability, durability and fit for use applied. |
Fittings, valves, indexing valves and other system components include: | bends first junctions inspection openings reflux valves traps. |
Land application options include: | covered surface irrigation shallow subsurface irrigation surface irrigation systems open to atmospheric pressure. |
Holding tanks include: | connections pumps sizing switches valves. |
Gullies include: | design and installation of gullies for the collection of grey water diversion of gullies to holding tanks or treatment systems. |
Pipe size and pump duty calculations include: | determination of flow and fixture loadings gradient calculations interpretation of design charts and tables pipe sizing calculations reduced level calculations. |
Pumpwell, pump and pump control requirements include: | automatic controls capacity corrosion-resistant materials detailing high and low-level water controls and alarms inlet and outlet design requirements installation and mounting requirements macerator requirements pump sizing pumpwell sizing selection of pump type valve requirements warning system. |
Materials include: | concrete earthenware fittings high density polyethylene (HDPE) low density polyethylene (LDPE) unplasticised polyvinyl chloride (PVC-U). |
Jointing methods include: | brazing compression joints gluing mechanical joints solvent cement threading welding. |
Pipe fixings include: | anchors bedding bracket spacing concrete support corrosion protection cover material requirements saddles wall brackets. |
Installation requirements include: | bedding clipping concrete support installation details jointing requirements level of workmanship. |
Plans include: | elevations details cross-sections isometrics axonometrics schematics, which may be produced using: computer generation Indian ink pencil pigment liner sections. |
Specification includes: | bedding clipping concrete support detailing of specialised components holding tanks jointing manufacturer requirements materials workmanship. |
Testing includes: | air pressure test drainage inspection hydrostatic test quality assurance (QA) audit. |
Commissioning schedule includes: | balancing sprinklers flow and pressure adjustments leak check pump settings system flushing. |
Operation and maintenance manual includes: | check for blockages land application compliance checks leak detection ongoing maintenance requirements pump maintenance regular inspections surface ponding checks system operational parameter adjustments and checks, including: chlorine levels dissolved oxygen nitrates pH phosphates suspended solids. |