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• Street trees shall be required along street frontages where noise attenuation walls are required. • Trees shall be chosen from the County Tree List. Oak Trees The site contains a number of valley oak trees as identified in the preliminary biological resources assessment for this site. A native oak tree is defined as a valley oak with a trunk diameter of six (6) inches to less than thirty-two (32) inches for a single trunk tree, or a combined trunk diameter of eight (8) inches or greater for a multi-trunk tree measured at four and one-half (4'/=) feet above the average ground elevation of the tree; or an interior live oak, California live oak, or blue oak with a trunk diameter of four(4) inches to less than thirty-two (32) inches for a single trunk tree, or a combined trunk diameter of six (6) inches or greater for a multi-trunk tree measured at four and one-half (4'/) feet above the average ground elevation of the tree (Development Title Section 9-110.4). A heritage oak tree is defined as a native oak tree that has a single trunk diameter of thirty-two (32) inches or greater measured at four and one- half (4'/) feet above the average ground elevation of the tree. The oak trees, including their driplines, need to be shown on the tentative map, and each heritage and native oak tree must be identified as such. The applicant needs to specify if he is proposing to build around the trees or remove them. Development Title Section 9-1505.4 states trees removed under the provisions of this Section shall be replaced subject to the following requirements: • Replacement stock shall be of healthy commercial nursery stock or acorns, of the species removed or other approved species, and shall be established and maintained for at least three (3) years (Development Title Section 9-1505.4[a]). • Replacement trees shall be planted as near as possible to the location of the removed tree or in an alternative location acceptable to the Review Authority (Development Title Section 9-1505.4[b]). • Replacement stock shall be planted between October 1 and December 31, and no later than twelve (12) months after the date of tree removal (Development Title Section 9- 1505.4[c]). • The number and maintenance of replacement stock shall be as follows: o Each heritage oak tree that has been removed under the provisions of Section 9- 1505.3(a) shall be replaced with five (5) trees or acorns, or combination thereof. o Each native oak tree that has been removed under the provisions of Section 9- 1505.3(b) shall be replaced with three (3) trees or acorns, or combination thereof. o The applicant shall be required to show to the satisfaction of the Review Authority that replacement stock will be planted and maintained in such a manner as to ensure the survival of said stock at the end of a three (3) year period commencing from the date of planting. (Development Title Section 9-1505.4[d]) • The Review Authority may require, as a Condition of Approval, the applicant to provide a performance bond or other financial security to replant any replacement tree found not to be alive at the end of the required three (3) year maintenance period. The applicant may be required to provide additional security to ensure maintenance of said trees for an ensuing three (3) year maintenance period (Development Title Section 9-1505.4[e]). To protect and preserve heritage oak trees and native oak trees from development and construction activity, the following standards shall be applicable: 3