Arborist.An individual certified as an arborist by the International Society of Arboriculture (ISA).
Arborist, city.An arborist employed by or chosen and retained by the City to review, evaluate and prepare reports and requests to remove and/or relocate protected trees. In performing the duties and responsibilities, the City arborist may conduct field inspections independently or in the company of City employees and/or other arborists.
Arborist report.A report prepared by an arborist containing specific information on the location, condition, potential impacts of development, recommended actions and mitigation measures regarding one or more trees on an individual lot or project site.
Certification letter.A concluding statement by an arborist stating that work that was performed was observed by an arborist and complies with the conditions of the discretionary project, the arborist report, the Tree Permit and this Zoning Ordinance.
Cutting.The detaching or separating of any limb, branch or root from a tree.
Dead tree.A tree that does not contain any live tissue (i.e., green leaves or live limbs).
Deadwood.Limbs or branches that contain no green leaves or live limbs.
Deadwooding.The act of removing deadwood. (Not a regulated activity when performed by or under the direct supervision of a certified arborist.)
Developer.Any person conducting any regulated activity within the protected zone of a protected tree.
Diameter at breast height (DBH).The diameter of a tree measured at four and one-half feet above ground level on the high side of the tree. The diameter may be calculated by use of the following formula: DBH = circumference at breast height/3.142.
Dripline.The outermost edge of a tree’s canopy prior to any cutting. When depicted on a map, the dripline will appear as an irregular shaped circle that follows the contour of the tree’s branches as seen from overhead.
Encroachment.Any regulated activity conducted within the protected zone of a protected tree.
Grading.Any removal or deposit of soil or earth material.
Irrigation.Transfer of water to a site by artificial means.
Native oak tree.Any tree of the genus Quercus and species lobata (valley oak), douglasii (blue oak), wislizenii (interior live oak) or hybrids thereof.
Protected Public tree.Any protected tree with one-half or more of its trunk or canopy on or above public land.
Protected tree.Native oak tree equal to or greater than six inches diameter at breast height (DBH) measured as a total of a single trunk or multiple trunks.
Protected zone.A circle equal to the largest radius of a protected tree’s dripline plus one foot. The radius is measured from the trunk at the base of the tree to the greatest extent of the tree’s dripline.
Regulated activities.Any activity done within the protected zone of a native oak tree, (with the exception of routine maintenance performed by or under the direct supervision of a certified arborist) which would adversely impact the health of a native oak tree, including, but not limited to, cutting, grading, irrigating and trenching.
Removal.The physical removal of a tree or substantially all of a tree.
Routine maintenance.Actions taken for the continued health of a protected tree including, but not limited to, deadwooding, mowing grass close to a tree, and application of insecticides in conformance with standards established by the International Society of Arboriculture or the National Association of Arborists.
Site planning meeting.An on-site meeting with the developer and the developer’s contractors, superintendent, and engineers; utility providers; the arborist; and City representatives to delineate special procedures, limits of work, lines of authority and special conditions or procedures not specifically covered by this chapter.
Tree permit.An authorization to conduct specific work or regulated activities within the protected zone of a protected tree.
(Ord. 5428 § 1, 2014)