[CANUFNET] RFQ wording for Arbostists to Oversee Construction around Trees

[Jalil Hashemi]

Hi Cat,

This is the link to our Tree Protection During Construction Procedure. http://www.oakville.ca/EN-TRE-001-001.htm

I copied the General Policy section and articles 3 and 7 of this procedure and highlighted some of the phrases that might help you in this regard.

General Procedure
Town trees required to be removed as a result of construction activities must receive approval by the Town Forester or designate. If approval is granted for removal of Town owned trees, the applicant will assume all costs involved and shall either: 1) pay the amenity value of the tree(s) calculated in accordance with the most recent International Society of Arboriculture Guide for Plant Appraisal; or 2) plant the equivalent number of trees based upon a "no net loss or canopy cover" objective as determined by the Town Forester or designate. Where tree relocation is approved, the applicant will assume all relocation and establishment costs.
Anyone failing to adhere to this procedure will be financially responsible for any resulting damage to trees in addition to any penalty that may be imposed under relevant by-laws or statutes.


3. Tree Protection Permit and or Agreement - Authorization from the Town
For trees covered under this procedure, written authorization from the Town is required in the form of either a Tree Protection Agreement, or a Tree Protection Zone Encroachment Permit or a Tree Permit; and
The applicant is required to have a Town approved tree service raise the crown of all branches to provide adequate clearance for construction equipment.
3.1. Tree Protection Agreement (TPA)
The applicant is required to enter into a Tree Protection Agreement when construction activities take place outside of the TPZ area. Should the Town determine that a tree protection agreement is required an additional fee shall be charged to the applicant in accordance with the established Town fees
3.2. Tree Protection Zone Encroachment Permit (TPZEP) - Schedule 2 (Application)

  1.  It is recognized that there are cases where existing or proposed utilities, capital infrastructure or buildings are located within the TPZ of a tree impacted by construction. The expectation is for the project design to respect the TPZ, however, in cases where the proposed construction impacts the area within the TPZ, the applicant shall demonstrate, with appropriate supporting documentation, that the impact on the structural integrity of the anchor roots will be within acceptable limits to avoid creating a hazardous tree.
  2.  A Tree Protection Zone Encroachment Permit is required when construction activities take place within the TPZ. An Application for TPZEP must be submitted to the Town of Oakville prior to anticipated construction start date. No other permit, agreement and/or consent issued by the Town authorizes working inside the tree protection zone of a Town Tree.
  3.  An arborist must be present on site at all times when work is within the TPZ. The schedule of inspections must comply with Section 7 set out herein. Above ground clearance for overhanging branches in the work zone must be taken into consideration. The applicant is required to have a Town approved tree service raise the crown of all branches to provide adequate clearance for construction equipment.
  4.  Root pruning in open trench methods of construction is required under the direction of - and along with - written approval of an arborist. The objective is to minimize severance of anchor roots, which provide upright support for the tree, thereby minimizing potential hazards.
  5.  Emergency repairs due to underground utilities are permitted to commence immediately. However, the utility company concerned is responsible for notifying the Town as soon as possible when Town trees are involved.
3.3. Tree Permit (TP)
Where the impact on the structural integrity of anchor roots is beyond acceptable limits and may cause a hazardous tree:

  1.  the tree may be removed in accordance with the applicable by-law; or
  2.  in the case of a town tree, the applicant shall bear the cost of the tree and stump removal as well as payment of the amenity value of the tree as calculated in accordance with the most recent International Society of Arboriculture's Guide for Plan Appraisal.


7.   Tree Protection Audits
Tree Protection Audits prepared by an arborist are required for all trees present or adjacent to a construction site when activity, or the potential for activity, takes place within the TPZ. A schedule of audits by an arborist will be specified at the discretion of the Town and shall consist of a minimum of three written site inspection reports. These tree protection audits shall include the following:

  1.  Tree Impact Evaluation:
     *   Disturbances which occurred within TPZ
     *   Excavation distance from the trunk and depth of excavations (e.g. grade changes, underground utilities, pavement section, footings, foundations, etc.)
     *   A soil compaction comparison to pre-construction condition
     *   Distance and diameter of any severed structural roots (greater than one inch in diameter) to the trunk
  2.  Mitigation process and costs:
     *   Pruning, irrigation, fertilization, and mulching requirements
  3.  Tree Hazard mitigation, if applicable
  4.  Tree replanting program, if applicable
  5.  Soil amendments (e.g. soil aeration, soil removal and replacement, etc.)
  6.  Recommendations for removal of severely damaged or hazardous trees
  7.  Provide photographic records where appropriate

Thanks,



Jalil Hashemi, Supervisor
Parks and Open Space, Forest Protection
Town of Oakville | 905-845-6601 ext.3848 | f: 905-338-4227 | www.oakville.ca<http://www.oakville.ca/>

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From: canufnet-bounces at list.web.net [mailto:canufnet-bounces at list.web.net] On Behalf Of Cybulski, Cat
Sent: Tuesday, February 01, 2011 9:31 AM
To: canufnet at list.web.net
Subject: [CANUFNET] RFQ wording for Arbostists to Oversee Construction around Trees


We would appreciate receiving examples of text for Request for Quote / Request for Proposal for the services of an Arborist (or equivalent) to inspect and oversee construction works around trees.  For example, to ensure tree protection barriers are installed and maintained, to be present during excavation around trees, to ensure branch/root pruning is done correctly, to advise on ways to reduce impacts on trees.  Also, how such services would be costed (lump sum, per hour, etc).

My e-mail is below if you would like to send direct.

Thanks,

C.

C. Cat Cybulski, R.P.F., Certified Arborist | Area Forester, Natural Heritage & Forestry Services | Transportation Services
The Regional Municipality of York | 17250 Yonge Street | Newmarket, ON | L3Y 6Z1
(905) 895-1200 ext. 5275 | 1-877-464-9675 | Fax: 905-895-7735
www.york.ca<http://www.york.ca/> | cat.cybulski at york.ca<mailto:cat.cybulski at york.ca>
Please consider the environment before printing this email.
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