Sec. 918.4. ADVISORY─METRO. A board of zoning appeals shall approve or deny variances of use from the terms of the zoning ordinance. The board may impose reasonable conditions as a part of its approval. A variance may be approved under this section only upon a determination in writing that:
(1) the approval will not be injurious to the public health, safety, morals, and general welfare of the community;
(2) the use and value of the area adjacent to the property included in the variance will not be affected in a substantially adverse manner;
(3) the need for the variance arises from some condition peculiar to the property involved;
(4) the strict application of the terms of the zoning ordinance will constitute an unnecessary hardship if applied to the property for which the variance is sought; and
(5) the approval does not interfere substantially with the comprehensive plan adopted under the 500 series of this chapter.