New trees shall be provided in accordance with the table set forth in Appendix B. For any existing tree of at least six-inch caliper which is preserved, credit for one tree shall be given for the first six inches of caliper and, for each additional four inches of caliper, credit for an additional tree shall be given.
(a) On site
In connection with any development, site alteration or enlargement involving the addition of at least 1,000 square feet of floor area, trees of at least three-inch caliper, pre-existing or newly planted, shall be provided on the zoning lot at the rate of one tree for each 1,000 square feet of lot area or portion thereof.
(b) Planting for open parking areas
Any development with open off-street parking areas with 10 spaces or more shall be subject to the tree planting and screening requirements of Section 107-483.