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Evidence Guide: AHCARB509 - Develop an arboricultural impact assessment report

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

AHCARB509 - Develop an arboricultural impact assessment report

What evidence can you provide to prove your understanding of each of the following citeria?

Undertake assessment of trees affecting site

  1. Identify and research impact of legislation and Australian Standards of trees on site
  2. Determine requirements of statutory authorities for trees on development site
  3. Determine local government planning laws, tree protection and preservation regulations for site
  4. Assess or survey trees on adjacent site and determine legal status and suitability for retention
  5. Conduct a site assessment and identify conditions that impact tree protection program
  6. Identify hazards, activities and circumstances that have potential to harm trees and assess the level of risk
  7. Locate and confirm trees plotted on survey plan
  8. Plot trees not represented onto survey plan
Identify and research impact of legislation and Australian Standards of trees on site

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine requirements of statutory authorities for trees on development site

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine local government planning laws, tree protection and preservation regulations for site

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess or survey trees on adjacent site and determine legal status and suitability for retention

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Conduct a site assessment and identify conditions that impact tree protection program

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify hazards, activities and circumstances that have potential to harm trees and assess the level of risk

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Locate and confirm trees plotted on survey plan

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Plot trees not represented onto survey plan

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Compile preliminary tree assessment data

  1. Collect available relevant plans and documentation
  2. Identify and record affected trees with botanical and common name on development and adjoining site
  3. Record tree dimensions according to statutory requirements
  4. Determine age class and estimate life expectancy
  5. Determine tree health in relation to tree physiology and pathology
  6. Determine condition of tree structure in relation to tree anatomy
  7. Assess heritage and cultural value of trees
  8. Assess habitat, ecology and environmental impact of trees on site
  9. Assess impact of location to existing and past site structures
  10. Determine the retention value
  11. Compile all tree assessment data required for report
Collect available relevant plans and documentation

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify and record affected trees with botanical and common name on development and adjoining site

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Record tree dimensions according to statutory requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine age class and estimate life expectancy

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine tree health in relation to tree physiology and pathology

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine condition of tree structure in relation to tree anatomy

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess heritage and cultural value of trees

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess habitat, ecology and environmental impact of trees on site

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess impact of location to existing and past site structures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine the retention value

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Compile all tree assessment data required for report

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Document preliminary arboricultural report

  1. Record all trees and groups of trees suitable for retention
  2. Determine indicative tree protection zone (TPZ) and structural root zone (SRZ) for each tree
  3. Plot tree identifiers and indicative TPZ on survey plan
  4. Document preliminary arboricultural report
Record all trees and groups of trees suitable for retention

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine indicative tree protection zone (TPZ) and structural root zone (SRZ) for each tree

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Plot tree identifiers and indicative TPZ on survey plan

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Document preliminary arboricultural report

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess impact of proposed development on trees

  1. Interpret existing plans, working drawings, terms and symbols
  2. Interpret development and design language
  3. Assess potential mechanical and chemical impact of development on trees and determine controls
  4. Determine impact of proposed development on trees
  5. Provide preliminary feedback to client on potential areas of improvement
Interpret existing plans, working drawings, terms and symbols

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Interpret development and design language

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess potential mechanical and chemical impact of development on trees and determine controls

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine impact of proposed development on trees

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Provide preliminary feedback to client on potential areas of improvement

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Contribute to design development

  1. Liaise with client on design of development to minimise impact on trees
  2. Assess constructability of design to ensure impacts on trees are minimised
  3. Liaise with design team to develop tree sensitive design and construction methods
Liaise with client on design of development to minimise impact on trees

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess constructability of design to ensure impacts on trees are minimised

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Liaise with design team to develop tree sensitive design and construction methods

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine indicative and actual TPZ

  1. Assess development requirements for site access and logistics
  2. Determine extent of encroachment into indicative TPZ
  3. Determine impact of works on SRZ
  4. Determine extent of actual SRZ
  5. Determine actual TPZ for trees to be retained
  6. Define and record the actual TPZ
Assess development requirements for site access and logistics

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine extent of encroachment into indicative TPZ

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine impact of works on SRZ

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine extent of actual SRZ

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine actual TPZ for trees to be retained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Define and record the actual TPZ

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Establish site conditions to retain tree viability to major encroachment

  1. Determine level of encroachment into TPZ following design development
  2. Assess impact of major encroachment on tree
  3. Consider implications of major encroachment on health, physiology and structural integrity of tree
  4. Assess impact on soil characteristics and volume of past, existing and future structures on tree
  5. Consider site conditions and design factors to minimise impact of encroachment on tree
  6. Establish site conditions and design factors required to retain viability of tree
  7. Determine additional remedial measures to protect tree viability
Determine level of encroachment into TPZ following design development

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess impact of major encroachment on tree

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Consider implications of major encroachment on health, physiology and structural integrity of tree

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess impact on soil characteristics and volume of past, existing and future structures on tree

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Consider site conditions and design factors to minimise impact of encroachment on tree

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Establish site conditions and design factors required to retain viability of tree

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine additional remedial measures to protect tree viability

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Develop protection measures and advise client

  1. Investigate tree protection devices and techniques to mitigate development activities
  2. Specify protection devices, techniques and systems to minimise impact of development
  3. Specify construction operations to minimise impact on trees
  4. Produce working drawings for installation and construction of tree protection systems
  5. Provide advice on tree removal and tree pruning program to client
Investigate tree protection devices and techniques to mitigate development activities

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Specify protection devices, techniques and systems to minimise impact of development

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Specify construction operations to minimise impact on trees

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Produce working drawings for installation and construction of tree protection systems

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Provide advice on tree removal and tree pruning program to client

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Document the relevant reports

  1. Prepare draft arboricultural impact assessment report
  2. Document tree protection recommendations and drawings
  3. Prepare and document tree management and monitoring guidelines and strategies for addressing potential problems
  4. Consolidate reports, plans and guidelines into final arboricultural impact assessment report and present to client according to workplace procedures
Prepare draft arboricultural impact assessment report

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Document tree protection recommendations and drawings

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare and document tree management and monitoring guidelines and strategies for addressing potential problems

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Consolidate reports, plans and guidelines into final arboricultural impact assessment report and present to client according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

An individual demonstrating competency must satisfy all of the elements and performance criteria in this unit.

There must be evidence that the individual has on at least one occasion developed an arboricultural impact assessment report for a development site and has:

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.

An individual must be able to demonstrate the knowledge required to perform the tasks outlined in the elements and performance criteria of this unit. This includes knowledge of:

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.