Landscape plans shall provide for a mix of evergreen, ornamental, shade trees, and shrubs. Fences, berms, and other structural features may also be used in a landscaping plan; however, earth berms shall only be used in conjunction with vegetative plantings. Efforts should be made to protect existing high-quality vegetation during construction. Factors to be considered include the size, age, condition, habitat, or historical significance of the vegetation. Trees to be preserved shall be selected early in the project planning process prior to establishing the site layout. Site grading should be minimized in those areas to prevent damage to the preserved trees. Preservation of existing large trees can be used to reduce new planting required by this article.
A. Buffer area requirements. Landscape buffer strips shall be provided separating all buildings, parking areas, vehicular circulation facilities or similar improvements from the right-of-way line of any public street. The depth of such buffer strips shall be 1/3 of the distance between the street right-of-way and any building line but shall not be less than 10 feet in depth and need not exceed 50 feet in depth. Sidewalks may be considered in the calculation of the buffer depth. Buffer strips shall contain at least one tree per 30 linear feet of street frontage or portion thereof and shall contain at least three shrubs per 100 square feet of buffer area. Buffer strips separating parking areas from the street right-of-way along Route 123 and Mansfield Avenue (Route 140) shall contain at least a three-foot-high evergreen hedge, berm, wall or fence along the entire street frontage of the parking lot.
B. Plant material required. Landscape buffer strip(s) shall contain at least one tree per 30 linear feet of street frontage or portion thereof and shall contain at least three shrubs per 100 square feet of buffer area.
C. Quality of plant material. Plant materials shall conform to the requirements described in the latest edition of American Standard for Nursery Stock, published by the American Association of Nurserymen. Plants shall be nursery grown.
D. Size of plant material. Plantings shall conform to the following minimal standards:
(1) Caliper measurements shall be taken six inches above grade for trees under four inches in diameter and 12 inches above grade for trees four inches in diameter and larger.
(2) Minimum branching height for all shade trees shall be six feet.
(3) Minimum size for shade trees shall be between 2 1/2 inches and three inches in diameter and 12 feet to 14 feet in height.
(4) Minimum size for evergreen trees shall be six feet in height.
(5) Minimum size for shrubs shall be three feet in height.
(6) Berms shall be at least three feet high and shall have a minimum two-to-one side slope.