The Board of Standards and Appeals may permit welfare centers in R1 or R2 Districts, provided that the following findings are made:

(a)        that such use is so located as not to impair the character of the surrounding area or its future development as a neighborhood of single-family residences; and

(b)        that such use is conveniently accessible to the people it serves.

The Board may prescribe appropriate conditions and safeguards to minimize adverse effects on the character of the surrounding area.