Establishes:

• Guidelines for conducting excavation within RPAs to minimize damage to tree roots.
• Recommends the use of hand tools or compressed air soil displacement to avoid mechanical excavation.
• Specifies that roots over 2.5 cm in diameter should only be cut with the approval of the supervising arboriculturist.
• Protects exposed roots from drying out and temperature extremes using dampened hessian or similar coverings.

Weak Points:

• The success of these measures heavily relies on strict adherence to guidelines and supervision.
• Unauthorised or improper excavation practices could lead to significant damage to tree roots and compromise tree health.

Establishes:

• Procedures for safely removing surfacing and structures within RPAs without causing damage to roots.
• Emphasises the importance of manual removal using appropriate tools and the use of machinery only from outside the RPAs.
• Highlights the potential need to leave below-ground structures in place to avoid excessive disturbance.

Weak Points:

• Risks associated with unauthorized removal or improper handling, leading to potential root damage.
• Effective monitoring and compliance are critical to ensure the protection of roots during these activities.

Establishes:

• Guidelines for conducting landscaping activities within RPAs without causing harm to trees.
• Emphasis on minimising soil disturbance and protecting root systems.

Weak Points:

• Landscaping activities have a high potential for causing unintended damage if not carefully managed.
• Ensuring all landscaping works are supervised and comply with arboricultural guidelines.

Establishes:

• Guidelines for installing or upgrading services (e.g., utilities) within RPAs to avoid damage to tree roots.
• Recommends trenchless installation methods (e.g., thrust boring) to prevent soil and root disturbance.
• Advises hand-dug trenches as a fallback when trenchless methods are not feasible, with precautions to avoid significant root damage.
• Provides methods to protect exposed roots during installation, such as using hessian for temporary protection.

Weak Points:

• Ensuring proper installation techniques to prevent root damage is critical.
• The effectiveness of trenchless and hand-dug methods relies on careful execution and supervision by an arboriculturist.
• Backfilled material around excavated services must be managed to maintain permeability and avoid compaction.

Establishes:

• Guidelines for installing new structures in RPAs while minimising root damage and soil disturbance.
• Recommends using pile, pad, or post supports for substantial structures to minimize soil excavation.
• Advises keeping existing below-ground structures to support new ones, reducing the need for new excavations.
• Provides methods to ensure water and air input under substantial structures.

Weak Points:

• Ensuring proper hand-digging techniques to avoid significant roots is essential.
• The risk of compaction and chemical contamination must be managed carefully during installation.
• The effectiveness of these methods depends on careful planning and adherence to guidelines to prevent root damage and soil compaction.

Establishes:

• The necessity of protecting trees during construction to comply with environmental standards and regulations.
• The potential impacts on trees and mitigation strategies to ensure minimal damage to the existing landscape.

Weak Points:

• The effectiveness of mitigation measures might be questioned, especially if past attempts have shown inadequate results.
• Implementation and adherence to these measures need thorough monitoring to ensure compliance.