For all uses that include areas used for service and outside storage of materials or other commercial product or raw materials, loading and unloading activities, and which are located adjacent to a residential district, such areas shall be screened along the entire rear lot line and side lot lines from the rear lot line to the rear building line to the following minimum standards:
(a) The width of the screening area shall be a minimum of five feet. Screening shall consistof solid wood privacy fences, hedges, vegetation, or an acceptable combination of theseelements provided that screening must be at least seven feet in height.
(b) Vegetation used for screening shall have a minimum opaqueness of 75% at all timeswithin two years of planting.