Buffers along parking areas shall be four feet, all others eight feet. Eight-foot buffers will consist of evergreen trees of alternating rows, eight feet on center in each row, with smaller evergreens or deciduous plant material between. Four-foot buffers will consist of evergreen trees of four-foot minimum height at planting, placed six feet apart, with small evergreens or deciduous plant material between. Within 10 feet of property corners, evergreens of not more than three feet shall be used. All trees will be replaced as required as a part of the common space maintenance program.