Purpose. The purpose of this section is to provide standards for variances which exceed the Class A and Class B variance criteria in this article. Class C variances may be granted if the applicant shows that, owing to special and unusual circumstances related to a specific property, the literal application of the standards of the applicable land use district would create a hardship to development which is peculiar to the lot size or shape, topography, sensitive lands, or other similar circumstances related to the property over which the applicant has no control, and which are not applicable to other properties in the vicinity (e.g., the same land use district); except that no variances to "permitted uses" shall be granted.