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Canopy Cover - The crown "branch" area of either a single tree or several combined trees. Critical Protection Zone (CPZ) - The area of undisturbed natural soil around a'tree defined by a concentric circle with a diameter in feet equal to the number of inches of trunk diameter. Drip Line - An imaginary line that extends downward from the outermost tips of a tree's branches to the ground. Street Tree - Any. tree planted within a developed public right-of-way between the curbline of the street and the property line of the site. Tree - Any self-supporting woody plant of normally grows in Portsmouth, at maturity, height of a minimum of 5 feet. a species which to an overall Section 36-52. Standards for Planting and Replacement of Trees. (1) Any subdivision plat submitted in accordance with the Subdivision Ordinance, Chapter 33 of the City Code, any site development plan submitted in accordance with the Zoning Ordinance, Chapter 40 of the City Code, and any application for a building permit for a principal residential structure, shall include a landscape plan. The landscape plan must be drawn to the same scale as the plat or site development plan and shall clearly indicate trees to be retained or planted to meet the requirements of this chapter. Trees to be retained on the site shall be clearly indicated by common and botanical names; their actual location on the site; and the extent of the site covered by the canopy of each tree. Stands of five (5) or more trees may be grouped together and shall indicate the overall area to be encompassed by their canopies. Critical protection zones for all trees to be retained shall be indicated. Trees to be planted on the site shall be clearly indicated by botanical and common names of these trees; their proposed locations on the site; and caliper and height. The plan shall include a note indicating that trees shall be planted in conformance with Section 36-52(9)(a)and (b) of this ordinance. When a landscape plan for a site has already been approved as part of a subdivision or site development plan for a larger development, no new landscape plan shall be required provided that the development of the site shall comply with all other provisions of this Ordinance.