(3) Evergreen trees for buffers, minimum height of eight feet, not for use as street trees, may be used for buffers along streets, if a minimum width of 10 feet is available

(4) Shrubs Any locally grown shrubs with a um height of three feet that are free of insects, pests and disease, in conformity with the standards of the American Association of Nurserymen and which are either native or well-adapted to southeastern Pennsylvania may be planted in buffers or other landscape areas

(5) Native plant materials

(a) Deciduous shade trees minimum one-and-one-half-inch caliper