2_Exhibits A, C & D - Laserfiche WebLink

HORTICULTURE I ARBORICULTURE I URBAN FORESTRY Oak Pruning Guidelines N O R T CIENCEE 4112 Foothill Road , Pleasanton, CA Qualifications An I.S.A. (International Society of Arboriculture) Certified Arborist or Tree Worker is to be present at all times during pruning. Arborist must have a State of Calif. Contractor's License for Tree Service(C61-D49)and provide proof of workman's compensation and general liability insurance. All pruning should be done in accordance with the Best Management Practices for Pruning(International Society of Arboriculture, 2002)and adhere to the most recent editions of the American National Standard for Tree Care Operations (Z133.1) and Pruning (A300). Any cabling/bracing shall adhere to the Tree Support Systems, Best Management Practices of the International Society of Arboriculture. Objectives The following are general objectives: 1. The primary goal of pruning oak#2 it to reduce the likelihood for structural failure. 2. Reduce the length and weight (mass) on branches with weaknesses (e.g. decay, poor attachments, excessive end weight)to reduce likelihood for failure. 3. Clean the crown of weak, hanging, partially attached and dead branches to a minimum size of 3" diameter. 4. Identify and mitigate defects that cannot be seen from the ground. Arborist must perform a safety inspection before beginning work. Because of the amount of decay present in these old oaks, pruning should be accomplished from a bucket truck where limbs will not safely support a climber. While in the tree, the arborist shall perform an aerial inspection to identify any defects in structure that require treatment. Any additional work needed shall be reported to the property owner. 1 All pruning shall be in accordance with the most recent editions of the Best Management Practices for Pruning(International Society of Arboriculture) and the American National Standard for Tree Care Operations (Z133.1)and Pruning (A300). Cabling operations should adhere to the ANSI A300 Support Systems and ISA Best Management Practices—Support Systems. 2. Interior branches shall not be stripped out. 3. Trees shall not be climbed with spurs unless the tree is being removed. 4. To reduce mass on a branch, remove weight at the ends of the branch using thinning and reduction cuts. Avoid removing interior branches. 5. Branch removal or reduction cuts (thinning cuts) are to be employed rather than heading cuts whenever possible. Trees shall not be topped or headed back unless there is no other way to adequately reduce weight. 6. Avoid making large removal cuts at the trunk where spread of decay is a concern. If a large scaffold branch must be removed, use a heading cut some distance from the trunk. 7. Remove no more than 25% of live foliage, if possible. HortScience, Inc. 1325 Ray Street I Pleasanton,CA 94566 phone 925.484.0211 I fax 925.484.5096 I www.hortscience corn placed in the TREE PROTECTION ZONE unless approved and monitored by the Consulting Arborist. Spoil from trench, footing, utility or other excavation shall not be placed within the TREE PROTECTION ZONE, either temporarily or permanently. Any modifications must be approved and monitored by the Consulting Arborist. 2. All demolition, excavation and construction within the dripline of trees shall be done using the smallest equipment possible. The Consulting Arborist will identify where hand excavation may be required. Motorized equipment shall not be used within the TREE PROTECTION ZONE. 3. Prior to excavation for the demolition and construction the tree may require root pruning outside the TREE PROTECTION ZONE by cutting all roots cleanly to the depth of construction. Roots will be exposed by either: pulling soil away from the tree by digging , normally 54"above grade. A multi-branched tree, which has