In the IP and I-1 Industrial Districts along each street line a landscaped area of at least 25 feet in depth from the right-of-way shall be provided and maintained. Along each side property line a landscaped area of at least 10 feet in width shall be provided. Such landscaping area shall extend from the street line along the portion of the lot which is used for any purpose (building, parking or storage). Along each rear property line a landscaped area at least 10 feet in depth shall be established, provided that this requirement may be modified or waived by the Land Use Board where the length and use of the lot, and the nature of adjoining uses, makes this requirement not practicable or not necessary to protect adjoining uses. All portions of the property not utilized by buildings of paved surfaces shall be landscaped, utilizing combinations such as landscaped fencing, shrubbery, lawn area, ground cover, mounding, existing trees, in order to either maintain or reestablish the tone of the vegetation in the area and lessen the visual impact of the structures and paved area. The established grades on any site shall be planned for both aesthetic and drainage purposes.