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: interpreting plans and specifications sizing and documenting layout of vacuum sewage systems, including residential, commercial and industrial may be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements must include: | acoustic performance architectural plans building specifications fire safety requirements flow requirements and sizing of pipework odour control owner requirements pipework identification Sewerage Code of Australia vacuum pumping station ventilation requirements. |
Vacuum sewerage system attributes must include: | availability cost flexibility installation requirements low water usage risks sewerage loading site conditions. |
Cost-benefit analysis: | compares the range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of project may include: energy costs expected design life labour costs material costs safety factors speed of installation suitability of design. |
Statutory and regulatory requirements and relevant Australian standards and codes may include: | Acts, regulations and commonwealth, state or territory, and local government requirements Sewerage Code of Australia AS/NZS3500 National plumbing and drainage AS2200 Design charts for water supply and sewerage Environmental Protection Authority (EPA) National Construction Code other relevant Australian standards or codes. |
Manufacturer requirements may include: | material specifications collection and storage systems design and installation equipment installation pump installation selection of compatible sanitary fixtures technical manuals. |
Desktop study may include collection and interpretation of data for design purposes in: | architectural and building plans developer plans manufacturer data documents, which may include: applications brochures forms policies sewer detail maps other reports as available. |
Performance requirements may include: | discharge requirements durability emergency storage and/or power backup longevity noise level self-cleaning ability sufficient capacity. |
Layout of pipework systems: | sewer infrastructure systems must include consideration of: cover grade location of vacuum pump station location vacuum sewage collection chambers odour control pipe access ventilation high-rise building projects must include consideration of: acoustic performance amenity of the building clipping and pipe support location of pipework (fire rating of enclosure) function of the building impingement on floor heights materials to be used size of penetrations type of building structure should not unduly affect building integrity and aesthetic appeal should include principles of economy, serviceability, durability and fit for use should be applied. |
Fittings, valves and controls include: | fittings: bends elbows inspection and maintenance access tees unions valves: backflow prevention isolating non-return strainers vacuum diaphragm valve controls: pneumatic control switch assembly vacuum management system. |
Pipe size calculations must include: | determining flow and fixture loadings EP density calculating gradient interpreting design charts and tables determining self-cleaning velocities manufacturer requirements probable simultaneous demand. |
Pipe supports may include: | bedding bracket spacing concrete support corrosion protection cover hanging brackets manufacturer-recommended specific fixings material requirements provision for expansion thrust blocks wall and ceiling brackets. |
Vacuum pumping station and pump control requirements may include: | access covers automatic controls capacity corrosion-resistant materials detailing emergency storage emergency power supply high and low-level water controls and alarms impeller sizing inlet and outlet design requirements installation and mounting requirements macerator requirements odour control pneumatic control switch assembly pump selection pump sizing pumpwell sizing space requirements vacuum pump systems valve requirements ventilation warning system. |
Materials: | appropriate materials specified based on: compatibility cost effectiveness durability fit for purpose may include: copper (Cu) polyethylene (PE) polypropylene (PP) polyvinyl chloride (PVC) stainless steel other approved material. |
Jointing methods may include: | brazing electrofusion welding flanged mechanical joints rubber ring solvent cement welding threading. |
Installation requirements may include: | acoustic performance bedding pipe protection, which may include: cover corrosion impact grade level of workmanship. fire rating manufacturer-recommended specific fixings pipe support provision for pipe movement serviceability and access. |
Computer software packages may 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 capital outlay/energy usage comparison positive effect on the environment in regard to no potential overflow or leakage water efficient consideration of the Green Building Council of Australia rating scheme local environment consideration overflow disposal/reuse. |
Plans: | may include: axonometrics cross-sections details elevations isometrics schematics site sections may be produced using: computer generation drawing equipment. |
Specification includes: | access chambers (manholes) bedding commissioning concrete support and detailing specialised components jointing manufacturer requirements materials odour control pump rising main safety (WHS) selection of compatible sanitary fixtures support testing vacuum pump station vacuum sewage collection chambers vacuum sewer mains ventilation workmanship. |
Testing may include: | compressed air test flow testing hydrostatic test inspection checklist performance vacuum quality assurance (QA) audit. |
Commissioning schedule must include: | system certification check for foreign material checking leaks emergency procedures system defects system functions as per design. |
Operation and maintenance manual includes: | as installed drawings results of commissioning test certification documentation maintenance schedules manufacturer brochures and technical information operating procedures. |