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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. Add any 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. |
Components may include: | natural water cycles, including:rivers and lakesartesian and aquifersbrackish and salt waterstormwaterengineered water cycles, including:reticulation systemsdamscollection systemsbores and wells. |
Features may include: | natural water cycles:rainfall patternssize and protectionretention time in catchmentevaporation ratetypes of source:boreriverdamengineered water cyclestype of user:domesticindustrialaquacultureagriculturetype of water or wastewater treatment system:urbannon-urbanlength and volume of collection and reticulation system. |
Variables may include: | natural water cycles, including:rainfalltemperaturepH, hardness and alkalinitytaste, odour, colour and turbiditynature and quantity of total dissolved and suspended matterdissolved oxygenengineered water cycles, including:flow ratesindustrial and agricultural uses and inputsinput and output parametersavailability and uses of recycling. |
Water testing may include: | pH, chlorine, suspended solids and dissolved oxygenalkalinity and volatile acidsmixed liquor suspended solidsmixed liquor volatile suspended solidscolour, turbidity and conductivitybiological oxygen demand (BOD) and chemical oxygen demand (COD), total organic carbon (TOC), phosphorus (P), nitrogen (N), other ions and organic compoundsidentification and enumeration of bacteria, cyanobacteria and protozoa. |
Substances commonly found in natural watersources may include: | metal ionssaltsN and Pmicroorganisms and algaeorganic and inorganic compounds producing colour, turbidity, odour or tasteradiation emitters. |
Interactions may include: | oxidation of metal ionssettling of suspended matterultraviolet destruction of microorganismsgrowth of nuisance organisms, such as cyanobacteria. |
Substances commonly found in range of wastewater sources may include: | toxinsmetalsdomestic or industrial organic matter other dissolved and suspended solidstoxic, flammable and asphyxiating gasesdisinfection by-products. |
Range of wastewater sources may include: | domesticindustryaquacultureagriculturestormwater. |
Environmental effects may include: | serious:material environmental harm to air, water or landnuisance environmental harm. |
Epidemiological effects may include: | faecal-oral route of infectioninfection and transmission of infectious agentseffects of biological, chemical or physical toxins on animals and plants. |
Microbial species may include: | E. ColisalmonellacampylobacterShigellaYersinia protozoaadenovirusenterovirushepatitis virus. |
Agents of disease may include: | bacteriavirusesprotozoamicrobial toxinschemical toxins. |
Agents for removing organic matter may include: | aerobic bacteriafacultative bacteriaanaerobic bacteria. |
Water treatment may include: | coagulationflocculationsedimentationfiltrationdisinfectionnatural systemsdesigned wetlandslagoonsImhoff tankssmall septic tanksbio-filterscontactorsactivated sludge processesspecial treatment processes. |
Separation processes may include: | filtrationpressescentrifugessedimentationgravity settlingflocculation chemically assisted processes. |
Input and output parameters may include: | Biological Oxygen Demand and Chemical Oxygen Demandsuspended solidsbiomass as mixed liquor suspended solids (MLSS) or mixed liquor volatile suspended solids (MLVSS)pHdissolved oxygen (DO)N, P and other chemical speciestoxinschlorinefaecal coliforms, such as E. Colicolourturbidity. |
Fundamental features may include: | pipe networksgravity and pressure systemspumps and pump wellsreservoirsresidual disinfectionoxygenationhydraulic modellingleak detectionleak prevention. |
Reticulation systems may include: | sewage collection systemswater distribution systems. |
Legislation and regulations relevant to the State or Territory may include: | Environmental Protection and Biodiversity Conservation Act 1999relevant state and territory environmental protection legislationrelevant water legislation and regulationsAustralian Drinking Water GuidelinesWater recycling guidelines Water quality guidelinesNational Water Quality Management Strategy. |
Forces of change may include: | community expectationsavailability of technologyclimatic changediminishing fresh water sources. |