Specifications include, but are not limited to: Pruning Tree pruning shall include appropriate cutting and specified disposal of cutting debris of the trees designated for pruning. The primary objective of pruning trees is to minimize risk to persons and property from the fall of trees or tree parts, and to provide proper tree clearances from roadways, sidewalks, lights, signs, buildings and other structures. Pruning shall only be conducted in conformance with the most current version of the ANSI A300-Part 1 Pruning Standard and according to clear objectives as defined by pruning type. Pruning for this project includes: Crown cleaning Crown reduction & raising Crown Cleaning: Unless otherwise specified or directed by DSP’s QA, all routine maintenance pruning operations, including when conducting crown reduction pruning, shall always include crown cleaning. Crown cleaning practices shall include: Removal of large (> 1 inch diameter) dead branches; and Removal of all diseased, insect-infested, damaged and broken branches; and Removal of crossing branches appropriate for removal as specified by the QA; and Re-cutting of old pruning stubs that will properly compartmentalize; and Removal of all epiphytes, vines and other invasive plants growing on the tree; and Reduction of density and structuring of excessive watersprouts within resprouting clumps by no more than 33%. Crown Reduction & Raising: When specified, crown reduction pruning shall be conducted to reduce crown weight and wind resistance to reduce the risk of failure of the tree or tree parts and/or reduce the height and/or spread of the tree in order to clear and prevent physical or visual obstacles for nearby infrastructure, people or vehicles. Crown reduction pruning includes: Crown cleaning as described above; and Identification of the desired height and/or spread of the tree crown; Identification of branches that should be removed/reduced to achieve desired clearance and/or risk reduction; and Removal of targeted branches to the point of origin or to a lateral branch that is at least 1/3 the diameter of the branch removed. Reasonable attempts should be made to maintain a natural form and structure of the tree during the crown reduction process. Maximum Removal of Foliage and Healthy Wood: When conducting crown reduction pruning, no more than 25% of the total foliage and healthy wood of a tree should be removed during any pruning event unless approved, in writing, by a QA. No more than 50% of the branches and foliage should be removed along the upper 2/3 of scaffold branches and the tree unless approved, in writing, by a QA. Tree Removal Tree removal shall include felling and specified disposal of the above ground portion of trees designated for removal. A 230’ X 50” Buffer next to Hospital Fence Line as shown in Attachment I Stump Height: Stumps shall be cut as close to the ground as practical, parallel to any slope and at a height not exceeding 1 inch above ground level unless obstacles prevent cutting lower stumps. Stumps exceeding 1 inch shall only be as approved by the DSP Designated Project Manager. Stump Treatment: Whenever trees are removed that are capable of resprouting and the stumps are not removed, a State of Hawaii registered herbicide shall be applied to the freshly cut surface of the stump. All herbicide applications shall be conducted in compliance with all Federal and State laws and regulations, and label directions. Recommended cut surface treatment is 20% Garlon 4 (a.i. triclopyr) in 80% mineral oil solution. However, alternate herbicide solutions may be applied that are considered effective. The applicator shall be solely responsible for the application efficacy, control and any off-target damage caused by any herbicide applications. Protection and Restoration of Existing Work/Site Conditions Trees and tree branches shall be cut and lowered in a manner that will prevent the cut parts from falling and damaging remaining trees, existing lawns, plantings, pavement, buildings, vehicles, and other infrastructure. Damage caused by the Contractor’s operations shall be restored to the original pre-existing condition to the satisfaction of the DSP Designated Project Manager at no additional cost to the DSP. Contractor shall take all reasonable precautions and actions to avoid the accidental or excessive release or spill of hazardous materials (e.g. vehicle and equipment oil and fluids, herbicides) on the work site. Contractor shall immediately contain and clean-up the release or spill of hazardous materials that may occur at any level and report the incident, control process and status of containment and disposal to the DSP Designated Project Manager, in writing, within 24 hours of the release or spill. Contractor shall implement storm water pollution control and prevention measures (e.g. best management practices) to prevent cutting debris, sediment-laden run-off and other pollutants from leaving the work area and/or entering streams and storm drainage systems. The Contractor shall maintain roads within the project site free from dirt and debris. The Contractor shall clean the project site and roadways of dirt and debris resulting from the Contractor’s operations at no additional cost to DSP. Debris Disposal Debris disposal shall be conducted as follows: Tree cuttings may be chipped and blown into forested areas only with the express, written approval of the DSP Designated Project Manager. Chips shall not be permitted to accumulate on walls, structures or infrastructure features, or hang in lower branches of trees or on shrubs or herbaceous plants. Chips shall be spread to a depth of less than 6-inches. Large logs that are not chipped should be removed and properly disposed at a recognized, approved disposal site. Cutting debris generated by the subject operation that are not approved for on-site disposal, including chips not disposed on-site, shall be removed from the site daily and disposed as specified within this SOW, unless otherwise approved by the DSP Designated Project Manager. Temporary stockpiling of large tree parts not approved for on-site disposal for short durations of time to facilitate cost-effective disposal shall only be permitted with the written approval and according to the specifications of the DSP Designated Project Manager. All debris approved for on-site disposal and any logs and debris temporarily stockpiled on-site shall be secured such that they cannot be accessed by the public and blow, wash, roll or otherwise move onto maintained landscapes, trails, roadways, waterways, ditches, drainage or other areas where they may disrupt, obstruct or damage design or aesthetic function. Tree cuttings, underbrush, green waste and debris shall be transported in a manner that will prevent spillage. Documentation must be provided (e.g. waste manifest and receipts) for disposal at a recycling/ processing facility licensed to accept the tree cuttings and debris, or a letter from the landowner where tree cuttings, underbrush, green waste and debris will be disposed, attesting that there is an agreement with the Contractor to dispose of tree cuttings and debris on their property. General rubbish, defined as all other non-tree cutting debris and waste, generated by the Contractor shall be disposed properly, off-site, in approved waste disposal receptacles.
