In all Residence Districts, Commercial Districts and M1 and M2 Districts, the City Planning Commission may permit municipal sewage disposal plants, provided that there are serious difficulties in locating it in a district where it is permitted as-of-right. The Commission may prescribe appropriate conditions or safeguards to minimize adverse effects on the character of the surrounding area including safety devices and the concealment of such use with fences, buffer zones, barriers or other screening devices and landscaping.

As a condition of granting a special permit for a municipal sewage disposal plant, the Commission shall find:

(a)        the proposed plant will be adequate for anticipated development in the area to be served; and

(b)        that the proposal promotes and protects the public health, safety and general welfare.