RFI - Attachment 3 - Arborcultural Impact Assessment Report · 132003.221108.3

    •   QTRA System: By providing a quantitative assessment, QTRA helps to remove emotional
        bias and urban myths from the risk evaluation process. It enables a rational decision-making
        process regarding tree safety and management.

In summary, the QTRA system allows for a structured and objective approach to assessing tree risk,
balancing the need for safety with the desire to retain valuable trees. This method helps manage
public concerns by providing clear, data-driven insights into tree risk.




Figure 1- QTRA Advisory Risk Thresholds (Ellison 2005)




    Tree Report: (AIA-27 Bayview NH-120226)                          Report Number:    (001)

    Prepared by (Sam Carr – Specialist Arbor Services Pty Ltd)                     Page 15 of 26