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Elements and Performance Criteria
Range Statement
Performance Evidence
The candidate must compile reports, plans and guidelines into an arboricultural impact assessment report and develop an evidentiary tree protection portfolio.
The candidate must be assessed on their ability to integrate and apply the performance requirements of this unit in a workplace setting. Performance must be demonstrated consistently over time and in a suitable range of contexts.The candidate must provide evidence for and demonstrate:identifying and researching relevant legislation and Australian Standardsdetermining specific requirements of statutory authorities in relation to trees on development sitedetermining local government planning laws, tree protection and preservation regulationsconducting a site assessment and identify conditions that impact tree protection programidentifying work health and safety hazards that impact safety of staff and public, assess level of risk and apply controlsidentifying hazards, activities and circumstances that have potential to harm trees and assess the level of risklocating and confirming trees plotted on survey planplotting trees not on plan onto survey plancollecting available relevant plans and documentation identifying and record tree genus and species by botanical and common namerecording tree dimensions, height, crown spread and diameter-at-breast-height (DBH)determining age class and estimate life expectancydetermining tree health in relation to tree physiology and pathologydetermining condition of tree structure in relation to tree anatomyconsidering heritage and cultural issuesconsidering habitat, ecology and other matters relevant to the siteconsidering location relative to existing and past site structuresdetermining the retention valuecompiling all tree assessment data required for reportrecording all trees and groups of trees suitable for retentiondetermining indicative tree protection zone for each treeplotting tree identifiers and indicative tree protection zone on survey plandocumenting preliminary arboricultural reportinterpreting existing plans, working drawings, terms and symbolsinterpreting development and design languageconsidering how development can result in mechanical and chemical damage and determine appropriate controls determining impact of proposed development on treesproviding preliminary feedback to client on potential areas of improvementassessing development requirements for site access and logisticsconsidering indicative tree protection zonedetermining extent of encroachment into indicative tree protection zone determining whether works will impact on structural root zonedetermining extent and area of structural root zonedetermining actual tree protection zone for trees to be retaineddefining and recording the actual tree protection zonesdetermining level of encroachmentassessing for a major encroachment: location and distribution of roots; potential loss of root mass; species tolerance to root loss; and age, health, size, lean and stability of treeconsidering impact of major encroachment on health, physiology and structural integrity of treeassessing soil characteristics and volume and presence of existing or past structures and design factorsconsidering how site and design factors minimise impact of proposed encroachment on treedemonstrating that the tree would remain viabledetermining additional remedial measures requireddeveloping an evidentiary portfolio of tree protection devices, techniques, tree-sensitive design and construction measures and tree responses to development activitiesspecifying protection devices, techniques and systems to minimise impact of developmentdetermining installation and construction methods for tree protection and produce working drawings for on-site personnel for implementationproviding advice on tree removal and tree pruning program to clientpreparing draft arboricultural impact assessment report developing tree protection plan and tree protection plan (drawing) preparing and documenting tree management and monitoring guidelines with alternative strategies for possible problemsconsolidating relevant reports, plans and guidelines into final version of arboricultural impact assessment report in digital and print format and presenting to client.
Knowledge Evidence
The candidate must demonstrate knowledge of:
relevant legislation and Australian Standardsspecific requirements of statutory authorities in relation to trees on development sitelocal government tree protection and preservation regulationssite assessment and conditions that impact tree protection programsplotting trees/ tree identifiers onto survey planstree genus and species by botanical and common nametree dimensions, height, crown spread and diameter-at-breast-height (DBH)age class and estimate life expectancytree health in relation to tree physiology and pathologyheritage and cultural issueshabitat, ecology and other matters relevant to the sitemethods of calculation of retention valueindicative tree protection zonespreliminary arboricultural reportsinterpretation of existing plans, working drawings, terms and symbolsdevelopment and design languageprinciples and methods of mechanical and chemical damage controlimpact of proposed development on treesstructural root zoneactual tree protection zoneslevel of encroachmentassessment of a major encroachment: location and distribution of roots; potential loss of root mass; species tolerance to root loss; and age, health, size, lean and stability of treesoil assessment of characteristics and volumeviability of a treeevidentiary portfolio of tree protection devices, techniques, tree-sensitive design and construction measures and tree responses to development activitiesprinciples and techniques of tree protection devices, methods and systemsinstallation and construction methods for tree protectionprinciples and methods relating to protecting trees from human activitiesworking drawings for on-site personnel for implementationmethods of documentation of tree management and monitoring guidelinesdraft arboricultural impact assessment reportanatomy, physiology and pathology of treesinterpretation of plans and working drawingstree protection plan and tree protection plan (drawing)documentation of tree management and monitoring guidelinesfinal version of arboricultural impact assessment reportdigital and print formats.