Approved Document 1 of 3 Arborist Report July 2020 OPW20-0145 · OPW20/0145

Tree Protection Zone (TPZ)
A TPZ is determined by setbacks calculated for each tree based on its age class, vigour class and crown spread (where
necessary) and each tree fenced off to form an enclosure around the tree with the tree at its centre, or may utilise an existing
structure being retained such as a wall of fence.

The TPZ should be secured by a lockable gate to restrict access and the area identified with signage. The area of the TPZ
should be mulched except where turfed and kept free of weeds. Where encroachment is required within the TPZ this should
be done only with the approval of the project arborist.

Indicative Tree Protection Zone




 Figure 1: Balanced Canopy                                            Figure 2: Unbalanced Canopy

Signage

Signs identifying the TPZ should be placed around the edge of the TPZ and be visible from within the development site. The
lettering on the sign should comply with AS 1319.

Indicative Protective Fencing
                                                                                LEGEND:
                                                                                1 Chain wire mesh panels with shade cloth (if
                                                                                    required) attached, held in place with
                                                                                    concrete feet.
                                                                                2 Alternative plywood or wooden paling
                                                                                    fence panels. This fencing material also
                                                                                    prevents building materials or soil from
                                                                                    entering the TPZ.
                                                                                3 Mulch installation across surface of TPZ (at
                                                                                    the discretion of the project arborist). No
                                                                                    excavation, construction activity, grade
                                                                                    changes, surface treatment or storage of
                                                                                    materials of any kind is permitted within the
                                                                                    TPZ.
                                                                                4 Bracing is permissible within the TPZ.
                                                                                    Installation of supports should avoid
                                                                                    damaging roots.




Source: Australian Standard Protection of Trees on Development Sites AS 4970-2009


Arborist Report for 28 Eenie Creek Road, Noosaville
Prepared by Arbor Operations – July 2020
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