K - Preliminary Arborist Report (29.08.2019)

              Additionally, the existing soil grade within the subject tree’s TPZ shall not be
              significantly raised beyond 300mm without prior design outcomes documented and
              arboriculturally certified by the appointed Supervising Project Arborist.


              The engagement of a Treescience Supervising Project Arborist to perform a ‘watching
              brief’ is probably the single most essential component to ensure successful tree
              preservation, in correlation with the Arboricultural Work Method Statement (AWMS).
              This will involve regular monitoring and providing of technical tree advice on a need by
              basis.




              06.1 TABLE THREE– KEY ISSUES ASSOCIATED WITH THE CONCEPT
              DESIGN & OUR PRELIMINARY ASSESSMENT

              CONCEPT
TREE NO.                           TPZ KEY ISSUES & IMPACTS                                               DESIGN & MITIGATION MEASURES
               DESIGN


                                                                          Prior to the commencement of any works, the appointed Arborist and relevant representatives are to
                                                                          meet on site to assess and document the status of the tree and define the relevant work methods,
                                                                          outline the communication pathway and the appointed Arborist is to identify the various key areas of
                                                                          critical interest.
                                               Issues:
                                                                          Before excavation occurs for demolition and/or construction all documented approvals are required,
                                  Damage to root system based on
                                                                          relevant work methods adopted, alternative construction methods considered, along with Arborist
                                      construction requirements
All trees                                                                 supervision as noted within an AIA.
nominated   Excavation and
                                                                          It is possible tree roots are within the early topsoil environment/area and underside of the concrete
   for       construction
                                               Impacts:                   footpath, edge of the existing retaining wall or grass environment.   Therefore, do not excavate into
retention
                                                                          the existing soil grade where woody tree roots and/or tree roots of high density have been identified
                                  Minor reduction in tree health and
                                                                          without direct consultation and approval from the Supervising Project Arborist.
                               possible onset of decay/fungal pathogens
                                        to severed tree root/s            Take all necessary steps to conform with AS4970-2009 and this report.

                                                                          Trunk padding and/or TPZ fencing, Arborist Supervision (AQF level 5), Tree Surgery (pre-emptive
                                                                          root pruning) and Arboricultural Work Method Statement.




                                               Issues:

                                Direct contact with trees and cambium
                                                                          Ensure the machinery is fit for purpose in relation and is not oversized given the confined
                                               damage
                                                                          environment.
All trees
nominated     Machinery
                                               Impacts:                   Machinery spotter is required during works within the TPZ’s
   for        movement
retention                         Minor reduction in tree health and
                               possible onset of decay/fungal pathogens   Trunk padding and/or TPZ fencing, Arborist Supervision (AQF level 5), and Arboricultural Work

                                        to from wound sites.              Method Statements.
                                                                                                                                                                          Page24




              PAR: V2
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