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HORTICULTURE 1 ARBORICULTURE AN FORESTRY <br /> Pruning Specifications HORT SCIENCE <br /> Deodar cedar trees <br /> 4189 Stanley Blvd. <br /> Pleasanton CA <br /> Qualifications <br /> An I.S.A. (International Society of Arboriculture) Certified Arborist or Tree Worker is to be <br /> present at all times during pruning. Arborist must have a State of Calif. Contractor's <br /> License for Tree Service (C61 -D49) and provide proof of workman's compensation and <br /> general liability insurance. <br /> Objectives <br /> 1. To clean the crown of dead, dying, diseased, stubs, hanging, and <br /> otherwise weakly attached branches to the 1" diameter class. <br /> 2. To reduce the failure potential of horizontally oriented or bowed <br /> branches. <br /> 3. To inspect the attachment of stems to the main trunk. <br /> Specifications <br /> 1. All pruning shall be in accordance with the Best Management Practices for <br /> Pruning (International Society of Arboriculture, 2002) and adhere to the most <br /> recent editions of the American National Standard for Tree Care Operations <br /> (Z133.1) and Pruning (A300). <br /> 2. To reduce failure potential, reduce the length and weight on branches by thinning <br /> small diameter ( <2 ") laterals and reducing the length of others. Branch removal <br /> or reduction cuts (thinning cuts) are to be employed rather than heading cuts. <br /> Trees shall not be topped or headed back. <br /> 3. No more than 20% of live foliage on the limb or tree shall be removed at any one <br /> pruning <br /> 4. While in the tree, the arborist shall inspect the attachments between the main <br /> trunks and scaffold limbs for defects not visible from the ground. <br /> 5. Trees shall not be climbed with spurs. <br /> 6. Pruning operations shall be conducted in a manner that does not damage <br /> surrounding understory plants and structures. <br /> 7. Tree specific cuts include: <br /> #61 Remove the hanger over the driveway. <br /> #62 Remove the upright stub, the east - facing lateral branch over the <br /> driveway, reduce the failed branch on the north to existing laterals and <br /> remove lateral branches with poor taper, particularly when low in the <br /> crown. <br /> #63 Remove low lateral limbs with poor taper on the north. <br /> Jim Clark jim @hortscience.com <br /> Certified Arborist WE -0846 <br /> Registered Consulting Arborist #357 <br />