Nortrax32 01 90.33

190 DavidManchester Road, OttawaTREE AND SHRUB PRESERVATION

16 May 2014Page 1

PART 1 - GENERAL
1.1 SUMMARY
/ .1 Section Includes:
.1 Materials and installation requirements where existing plant material is located in or adjacent to a construction area.
.2 Related Requirements
.1 Section 329345 - Tree Pruning.
1.2 REFERENCES
/ .1 Canadian Standards Association (CSA International).
.1 CSA G30.5-[M1983(R1998)], Welded Steel Wire Fabric for Concrete Reinforcement.
1.3 DEFINITIONS
/ .1 Mycorrhiza : association between fungus and roots of plants. This symbiosis, enhances plant establishment in newly landscaped and imported soils.
.2Drip-line of trees: means the ground surface directly beneath tips of outermost branches, which shall not be less than 3.0 m radius from the trunk or may be larger as designated by the Contract Administrator.
.3Critical Root Zone of trees (CRZ): means the zone under a tree where there should be no disturbance before, during and after construction. The CRZ is established as being 10 centimetres from the trunk of a tree for every centimetre of trunk diameter. The protected zone may be larger as designated by the Contract Administrator.
1.4 DELIVERY,
STORAGE AND
HANDLING
/ .1 Waste Management and Disposal:
.1 Separate waste materials for reuse and recycling.
.2 Remove from site and dispose of packaging materials at appropriate recycling facilities.
.3 Collect and separate for disposal paper, plastic, polystyrene, corrugated cardboard packaging material in appropriate on-site binsin accordance with Waste Management Plan.
.4 Separate for reuse and recycling and place in designated containers Steel, Metal, Plastic waste in accordance with Waste Management Plan.
.5 Divert unused metal and wiring materials from landfill to metal recycling facility as approved by Contract Administrator.
.6 Divert unused wood materials from landfill by alternative disposal approved by Contract Administrator.
.7 Divert unused stone and aggregate materials from landfill to local facility approved by Contract Administrator.
.8 Divert unused plastic materials from landfill to local recycling facility approved by Contract Administrator.
.9 Place materials defined as hazardous or toxic in designated containers.
.10 Dispose of unused fertilizer material at official hazardous material collections site approved by Contract Administrator.
.11 Handle and dispose of hazardous materials in accordance with Regional and Municipal regulations.
.12 Do not dispose of unused fertilizer material into sewer system, into streams, lakes, onto ground or in any other location where they will pose health or environmental hazard.
.13 Ensure emptied containers are sealed and stored safely.
.14 Fold up metal banding, flatten and place in designated area for recycling.
1.7 SCHEDULING
/ .1 Obtain approval from Contract Administrator of schedule indicating beginning of Work.
1.8 MAINTENANCE
DURING WARRANTY
PERIOD
/ .1 From time of acceptance by Contract Administrator to end of warranty period, perform following maintenance operations.
.1 Water to maintain soil moisture conditions for optimum growth and health of plant material without causing erosion.
.2 Apply pesticides in accordance with National Standard for Pesticide Education, Training and Certification in Canada, Federal, Provincial and Municipal regulations as and when required to control insects, fungus and disease. Obtain product approval from Contract Administrator prior to application.
.3 Apply fertilizer in early spring at manufacturer's suggested rate.
.4 Remove dead, broken or hazardous branches from plant material.
PART 2 - PRODUCTS
2.1 MATERIALS
/ .1 Fertilizer:
.1 To Canada Fertilizer Act and Fertilizers Regulations.
.2 Complete, commercial, slow release with 35 % of nitrogen content in water-insoluble form.
.2Anti-desiccant: commercial, wax-like emulsion.
.3Snow fence: Standard plastic fencing or approved equivalent in good condition, 1.2 m high.
.4T-bars: 2.4 m long steel T-bars; T-bars shall be straight.
PART 3 - EXECUTION
3.1 IDENTIFICATION
AND PROTECTION
/ .1 Identify plants and limits of root systems to be preserved as approved by Contract Administrator.
.2 Protect plant and root systems from damage, compaction and contamination resulting from construction as approved by Contract Administrator.
.3Soil compaction within the drip line of a tree shall be avoided at all times, unless otherwise agreed to in advance by the Contract Administrator. Placement of plywood, metal decks, sand, etc. will be considered prior to authorizing heavy equipment within the unprotected drip-line of all trees on this project.
.4Equipment shall not be allowed to operate, park, be repaired or refueled; not shall construction materials be stored or any earth materials be stockpiled within the barricades or within 2 m of the outer edge of the drip-line of a tree.
.5Ensure no pruning is done inside drip line. If pruning inside drip line is required consult an arborist or Canadian Certified Horticultural Technician (CCHT) as approved by Contract Administrator.
.6Barrier for tree protection:
.1To protect trees and shrubs in lawn areas or planting beds that are to remain the Contractor shall drive T-bars vertically 1.2m into ground, spaced maximum 3.0 m apart. The snow fence shall be wired at 3 places to each T-bar. The snow fence shall be stretched between posts to prevent sag.
.2The snow fence shall be erected to provide a continuous barricade between designated trees and the work area prior to construction.
.3The snow fence shall be placed at the critical root zone of the trees, unless inadequate to provide a 1.5 m buffer zone between the fence and limit of construction. With the permission of the Contract Administrator, the fence may be placed within the drip-line of the tree to provide the required buffer zone of 1.5 m but in no case less than 1 m from the outer circumference to the trunk of the tree.
.4When the trunk of trees are less than 4.5 m apart, the trees shall be considered a woodlot and the barrier shall be placed so it forms a continuous barricade around the woodlot as specified in the Contract Documents.
.7Trunk protection:
.1Where indicated by Contract Administrator, trunk protection shall be installed to a height of 2.4 metres or as prescribed by the Contract Administrator, wood laths shall be used (2” x 4” or other material as approved by Contract Administrator) and shall be temporarily installed parallel to the tree and around the complete circumference of the tree by latching and / or wire.
.8Tree protection measures shall be maintained erect and in good repair at all times during construction operations, and shall be removed upon completion when agreed to by the Contract Administrator. Temporary removal of barricades will be considered only after reviewing the requirements with the Contract Administrator.
3.6 PRUNING
/ .1 Where required, prune in accordance with Section [329345 - Tree Pruning].
.2 Prune crown to compensate for root loss while maintaining general form and character of plant.
.3Branches 25 mm or greater in diameter that are broken due to construction operations shall be cut back cleanly on the tree side of the break or to within 10 mm of their base, if a substantial portion of the branch is damaged.
.4Roots 25 mm or larger in diameter that are exposed due to construction operations shall be cut back cleanly to the soil surface.
.5Bark that is damaged shall be neatly trimmed back to uninjured bark without causing further injury to the tree.
3.7 ANTI-DESICCANT
/ .1 Apply anti-desiccant to foliage where applicable and as directed by Contract Administrator.

END