§ 155.145 OTHER USES AND STRUCTURES REQUIRING SCREENING.
   (A)   Screening shall be provided around all service structures (for example, propane tanks, dumpsters, heating/air conditioning units, electrical transformers, telecommunications boxes) that exceed 42 inches in height and 42 inches in width or are visible from adjoining property when located on roofs. Loading docks and outdoor storage or maintenance yards shall also be screened when adjacent to any right-of-way or residential use or zone.
   (B)   No landscape material shall be planted closer than five feet from the sides of any electric transformer box and all landscape material shall be planted a minimum of ten feet from the door of such boxes.
   (C)   Screening shall consist of a continuous fence, wall, berm, evergreen planting, or combination thereof designed to blend in with the architecture (when roof mounted) or character of the area. (Evergreen plantings are not permitted for dumpster screening.) Planting beds, when provided for screening material, shall be at least six feet wide. The mature height of the screening material shall be one foot greater than the height of the enclosed service structure, but shall not be required to exceed eight feet in height.
(LDC § 10.2.6)