RFI - Aboricultural Impact Assessment

 Abbreviations:
 DSH         Diameter at Standard Height:
             Trunk diameter at 1.4m above ground level.
 NRZ         Notional Root Zone:
             the primary trigger for arboricultural input on a development site.
             NRZ RADIUS = 12 x DSH
 TPZ         Tree Protection Zone:
             as per AS 4970-2025 Protection of trees on development sites, it is the principal means of protecting trees on a
             development site. The TPZ is a combination of the root and crown area requiring protection to be isolated from
             construction disturbance so that the tree can remain in a viable condition. The TPZ incorporates the SRZ.
 SRZ         Structural Root Zone:
             as per AS 4970-2009 Protection of trees on development sites, it is a mathematical calculation of the surface
             area of protection required to maintain a tree’s stability – a larger area is required to maintain a tree in viable
             health. It is only necessary to calculate the SRZ when a major encroachment into a TPZ is proposed.
 Arborists:
 Consulting A suitably qualified and experienced tree expert who provides independent, professional advice about the care,
 Arborist    management, preservation, industry standards / best practice, hazard mitigation and risks associated with trees—
             typically in urban or development contexts.
             Experience in written Arborist Reports, Tree Management Plans and Expert Advice.
             Minimum Qualification AQF level 5 + 5 years
 Project     An arborist specifically appointed to a construction or development project to oversee and manage tree-related
 Arborist    matters in line with planning conditions, Arborist Reports, Environmental guidelines, and industry standards.
             Minimum Qualification AQF level 5
 Craft       An AQF 3 qualified hands-on tree professional who specialises in the physical work of tree care and management,
 Arborist    such as climbing, pruning, removing, or planting trees.


A PPENDIX 2: TPF S IGN
Sample Tree Protection Zone sign for inclusion at the TPZ boundaries.




25_10_21_AIA_TPA_23BottlebrushAve                                                                                Page 19 of 19