Under some unusual circumstances, a proposed use which more intensely affects an area than those uses permitted in the zoning district in which it is located, may nonetheless be desirable and compatible with permitted uses, if that use is properly controlled and regulated. Such uses shall be listed as conditional uses within the description of the respective zoning districts. The Planning and Zoning Board may allow such a use to be established as a conditional use where these unusual circumstances exist and where the proposed use will be consistent with the general purpose and intent of this Planning and Zoning Code.