When plans have been finalised, including changes recommended in the PTA report completed, your arborist will proceed with the Arboricultural Impact Assessment Report (AIAR). This report needs to be submitted to the consent authority as part of the development application (DA).
The AIAR contains all the relevant information from the Preliminary Tree Assessment as well as discusses the impact of the proposed development on the trees. This document includes recommendations on how the trees should be protected during the proposed development in a document titled the Tree Protection Plan (Specifications) and shows the tree protection measures’ location in the Tree Protection Plan (Drawing).
AS 4970-2009 ‘Protection of trees on development sites’ states that you do not need an AIAR if the proposed work is more than 12 times the trunk diameter from any tree. Where the work is proposed to be closer than this 12 times benchmark, your consulting arborist will be able to advise you on how close the proposed work can come to the tree as well as what measures and arboricultural impact will be required to offset this impact.