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City of San Mateo Municipal Code.

27.71.120 Street Trees.

(a) Tree Planting.

(1) 24-inch box size or larger street trees shall be planted along public streets in accordance with the City Street Tree Master Plan. The City Arborist shall have the authority to recommend planting of fifteen (15) gallon street trees when:

(A) Upon written request by the applicant; and

(B) The fifteen (15) gallon size trees are the only ones available in stock, or

(C) The quality of the fifteen (15) gallon size trees are superior to that available in 24-inch box size.

(2) Trees shall be planted at a spacing not to exceed thirty (30) feet except to allow for utilities, street furnishings, driveways, or other features necessary to ensure public safety, as approved by the City Arborist.

(b) Access Easement. Where a planning application requires a parcel or tentative map, an access easement shall be required if the street trees are to be located on private property and no such easement exists. However, it is recommended that even when a parcel or tentative map is not required or included, an easement be provided to the City for site access purposes in the event of an emergency or a hazardous situation.