Whenever the tract proposed to be subdivided is of such unusual size or shape or is surrounded by such development or unusual conditions that the strict application of the requirements contained in this chapter would result in substantial hardships or injustices, the City Council, upon written recommendation of the Commission, may modify or waive such requirements. Any variations and exceptions granted hereunder shall be in harmony with the intended spirit of this chapter, granted with a view toward protecting the public welfare and interest of the City and surrounding area, and not be in violation of the Zoning Ordinance.