In C2 Districts, and C4 though C7 Districts, the Board of Standards and Appeals may permit automotive service stations listed under Use Group VI and, in those districts and C8 Districts, may permit modification to the accessory sign regulations for such use, provided that the following findings are made:

1. that such use will not impair the character or the future use or development of the surrounding area and will cause minimal interruption to the continuity of surrounding retail frontages;
2. that such use will not create or contribute to serious traffic congestion and will not unduly inhibit surface traffic and pedestrian flow;
3. that the site for such use which is not located on an arterial highway or a major street has a maximum area of 15,000 square feet;
4. that any facilities for lubrication, minor repairs or washing are located within a completely enclosed building;
5. that the site is so designed as to provide, at maximum expected operation, reservoir space for five waiting automobiles within the zoning lot in addition to spaces available within an enclosed lubritorium or at the pumps;
6. that entrances and exits are so planned that, at maximum expected operation, vehicular movement into or from the automotive service station will cause a minimum of obstruction on streets or sidewalks;
7. that, along any rear lot line or side lot line adjoining a Residence District, the zoning lot is screened as the Board may prescribe, by either of the following methods:
   1. a strip at least four feet wide, densely planted with shrubs or trees at least four feet high at the time of planting and which are of a type which may be expected to form a year-round dense screen at least six feet high within three years; or
   2. a wall or barrier or uniformly painted fence of fire-resistant material at least six feet high, but not more than eight feet above finished grade. Such wall, barrier, or fence may be opaque or perforated, provided that not more than 50 percent of its face is open; and
8. that the modifications to accessory sign regulations are necessary for adequate advance identification of such automotive service station to motorists on heavily traveled streets in the interests of traffic safety. In no event shall such signs project across a street line more than four feet and modification to the surface area of signs shall be limited to C1 and C2 Districts and a maximum surface area of 150 square feet. 

The Board may prescribe additional appropriate conditions and safeguards to minimize adverse effects on the character of the surrounding area, and to protect residential zoning lots which are adjoining or across the street.