Upon application in proper form pursuant to Sections 17.54.590 and 17.54.610 and subject to the procedure governing variances set forth herein, the strict terms of Title 17 of this code, except as to regulations relating to principal uses, may be varied in specific cases upon affirmative findings of fact upon each of these three requirements:

    A.    That there are special circumstances including size, shape, topography, location or surroundings, applicable to the property which deprive the property of privileges enjoyed by other property in the vicinity under the identical zoning classification;

    B.    That the granting of the application will not constitute a grant of special privileges inconsistent with the limitations upon other properties in the vicinity and zone;

    C.    That the granting of the application will not be detrimental to persons or property in the neighborhood or to the public welfare. (Prior gen. code § 8-93.0)