In recommending the permitting or classifying of an unlisted use, the commission shall first make a finding that all of the following conditions exist:
A. The use is in conformity with the stated intent and purpose of the zone;
B. Field investigations have disclosed that the subject use and its operation are compatible with the uses permitted in the zone wherein it is proposed to be located;
C. The subject use is similar to one or more uses permitted in the zone within which it is proposed to be located; and
D. The subject use will not cause substantial injury to the use of property in any abutting zone. (Ord. 1000 § 32.10(C), 1955)