The outdoor storage of materials, equipment, or supplies, when permitted in any commercial or industrial district, shall be so located or screened, fenced or landscaped so as to effectively prevent visibility of such storage from all abutting residential zoning districts or abutting existing residential uses and public rights-of-way. Such screening shall be sufficient if it prevents visibility of such storage area by persons traveling on public rights-of-way or standing at grade level on the side or rear lot lines of such property. Such screening may be accomplished by any one of the following methods:
1. Wall or Fence. Such fence shall not be less than six feet in height and shall be constructed in such a manner as to effectively accomplish the requirements of this section.
2. Landscaped Strip. Such strip shall be designed and landscaped by a qualified architect, engineer, or landscape architect; predominant planting shall be evergreen type trees, shrubs and plants so as to assure year-round effectiveness. Density and height of plantings shall be adequate to serve as a screen.