AHCARB509 — Develop an arboricultural impact assessment report

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What an assessment for AHCARB509 must cover

148 assessable components: 9 elements (54 performance criteria), 50 performance evidence and 41 knowledge evidence requirements, plus 3 foundation skills. An audit-defensible tool maps every question and task back to these — that mapping is the coverage matrix Auditori generates alongside the assessment.

Elements & performance criteria

1 Undertake assessment of trees affecting site

1.1Identify and research impact of legislation and Australian Standards of trees on site
1.2Determine requirements of statutory authorities for trees on development site
1.3Determine local government planning laws, tree protection and preservation regulations for site
1.4Assess or survey trees on adjacent site and determine legal status and suitability for retention
1.5Conduct a site assessment and identify conditions that impact tree protection program
1.6Identify hazards, activities and circumstances that have potential to harm trees and assess the level of risk
1.7Locate and confirm trees plotted on survey plan
1.8Plot trees not represented onto survey plan

2 Compile preliminary tree assessment data

2.1Collect available relevant plans and documentation
2.2Identify and record affected trees with botanical and common name on development and adjoining site
2.3Record tree dimensions according to statutory requirements
2.4Determine age class and estimate life expectancy
2.5Determine tree health in relation to tree physiology and pathology
2.6Determine condition of tree structure in relation to tree anatomy
2.7Assess heritage and cultural value of trees
2.8Assess habitat, ecology and environmental impact of trees on site
2.9Assess impact of location to existing and past site structures
2.10Determine the retention value
2.11Compile all tree assessment data required for report

3 Document preliminary arboricultural report

3.1Record all trees and groups of trees suitable for retention
3.2Determine indicative tree protection zone (TPZ) and structural root zone (SRZ) for each tree
3.3Plot tree identifiers and indicative TPZ on survey plan
3.4Document preliminary arboricultural report

4 Assess impact of proposed development on trees

4.1Interpret existing plans, working drawings, terms and symbols
4.2Interpret development and design language
4.3Assess potential mechanical and chemical impact of development on trees and determine controls
4.4Determine impact of proposed development on trees
4.5Provide preliminary feedback to client on potential areas of improvement

5 Contribute to design development

5.1Liaise with client on design of development to minimise impact on trees
5.2Assess constructability of design to ensure impacts on trees are minimised
5.3Liaise with design team to develop tree sensitive design and construction methods

6 Determine indicative and actual TPZ

6.1Assess development requirements for site access and logistics
6.2Review indicative TPZ
6.3Determine extent of encroachment into indicative TPZ
6.4Determine impact of works on SRZ
6.5Determine extent of actual SRZ
6.6Determine actual TPZ for trees to be retained
6.7Define and record the actual TPZ

7 Establish site conditions to retain tree viability to major encroachment

7.1Determine level of encroachment into TPZ following design development
7.2Assess impact of major encroachment on tree
7.3Consider implications of major encroachment on health, physiology and structural integrity of tree
7.4Assess impact on soil characteristics and volume of past, existing and future structures on tree
7.5Consider site conditions and design factors to minimise impact of encroachment on tree
7.6Establish site conditions and design factors required to retain viability of tree
7.7Determine additional remedial measures to protect tree viability

8 Develop protection measures and advise client

8.1Investigate tree protection devices and techniques to mitigate development activities
8.2Specify protection devices, techniques and systems to minimise impact of development
8.3Specify construction operations to minimise impact on trees
8.4Produce working drawings for installation and construction of tree protection systems
8.5Provide advice on tree removal and tree pruning program to client

9 Document the relevant reports

9.1Prepare draft arboricultural impact assessment report
9.2Document tree protection recommendations and drawings
9.3Prepare and document tree management and monitoring guidelines and strategies for addressing potential problems
9.4Consolidate reports, plans and guidelines into final arboricultural impact assessment report and present to client according to workplace procedures

Performance evidence

identified and researched the impact and specific requirements of legislation, Australian Standards, and local government laws for trees on development site
conducted site assessment and identified conditions that impact tree protection program
identified work health and safety hazards, assessed risk and applied controls for site
identified hazards and assessed the risks that harm trees
located, confirmed and plotted all trees on survey plan
collected plans and documentation
identified and recorded tree by botanical and common name and included a record of:
tree height, crown spread and diameter-at-breast-height (DBH), diameter at ground level and statutory dimensions
age class and estimated life expectancy
tree health in relation to tree physiology and pathology
condition of tree structure in relation to tree anatomy
assessed the following values for trees:
heritage and cultural
habitat, ecological and environmental
location of tree to existing and past site structures
determined the tree retention value
compiled tree assessment data for report
recorded all trees suitable for retention
determined and plotted indicative tree protection zone (TPZ), tree identifiers for each tree on survey plan
documented preliminary arboricultural report
interpreted plans, designs, working drawings, terms, symbols and language for development
assessed and determined controls for mechanical and chemical damage affecting trees
provided client with preliminary feedback for potential improvements
liaised with client on design development and assessed impact of construction on trees
liaised with design team to develop tree sensitive design and construction methods
assessed development requirements for site access and logistics
reviewed indicative tree protection zone and determined:
extent of encroachment into indicative TPZ
impact of works on structural root zone (SRZ)
determined extent of SRZ
determined and recorded level of encroachment and actual TPZ for trees to be retained
assessed the following factors affecting tree viability for a major encroachment:
location and distribution of roots
potential loss of root mass
species tolerance to root loss
age, health, size, lean and stability of tree
assessed impact of encroachment on health, physiology and structural integrity of tree
assessed impact on soil characteristics and volume from past, existing or planned structures
considered site and design factors to minimise impact of proposed encroachment
rationalised all factors to decide on the viability of the tree
determined remedial measures to protect the tree
investigated, specified and produced installation and construction drawings for tree protection devices and systems to mitigate tree damage
provided advice to client on tree removal and tree pruning program
prepared a draft arboricultural impact assessment report
developed a tree protection plan and drawings
prepared, documented tree management and monitoring, including strategies to handle problems
consolidated reports, plans and guidelines into final arboricultural impact assessment report in both:
digital format
print format
presented report to client.

Knowledge evidence

legislative and regulatory framework for trees on development sites, including:
role of Australian Standards AS2303, AS2223, AS3743, AS4970 and AS4373
specific requirements of statutory authorities
local government tree protection and preservation regulations
construction drawings, plans and documentation, including:
types of drawings and plans
terms, symbols and language used in development
version control of drawings, including revision and issue dates
working and communicating with clients and development design personnel
conducting site assessment and conditions that impact tree protection programs, including:
development site safety and safe access procedures
plotting trees/tree identifiers onto survey plans
naming and recording tree by botanical and common name
methods for determining tree dimensions, height, crown spread and DBH
age class and estimated life expectancy
tree health in relation to tree physiology and pathology
assessing and determining the viability of a trees
soil volume and characteristics on development sites
tree values and importance, including:
heritage and cultural values
habitat, ecological value
environmental values
methods of determining retention value
the principles of TPZ, including:
methods of mechanical and chemical damage to trees on development sites
impact of proposed development on trees
SRZ
levels of tolerance to encroachment and potential loss of root mass
species tolerance to root loss
type and structure of tree impact assessment reports, including:
purpose and structure of preliminary arboricultural report
purpose and structure of arboricultural assessment report
use and interpretation of development plans and documentation
drawing techniques for illustration in reports and plans, including digital images
tree protection plans and drawings
purpose and structure of tree management and monitoring guidelines
presenting reports in digital or paper-based formats
tree protection devices, methods and systems, including:
designs and their purpose
tree response to tree protection systems
installation and construction methods for tree protection.

Foundation skills

Reading: Interpret legislative documents, industry standards, plans and specifications to identify critical information and concepts for use in tree assessment reports
Writing: Create complex documents and reports demonstrating control over different writing styles and purposes
Numeracy: Accurately interpret numeric data from plans, specifications and site measurements Perform calculation for measuring and estimating tree dimensions and the extent of TPZ and SRZ

Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.

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Questions about assessing AHCARB509

What does an assessment tool for AHCARB509 need to cover?

To satisfy the Principles of Assessment and Rules of Evidence, an assessment for AHCARB509 needs to address all 148 unit components: 9 elements with 54 performance criteria, 50 performance evidence requirements, 41 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.

How does Auditori generate an assessment tool for AHCARB509?

Auditori pulls the current release of AHCARB509 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.

Is the first assessment tool really free?

Yes. Every new account includes one free credit — enough to generate the complete assessment tool for AHCARB509 — with no card and no subscription required. After that it's pay-as-you-go per unit.

Can I check my existing AHCARB509 assessment instead of generating a new one?

Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of AHCARB509, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.

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