Within the zoning districts established by this Chapter, or by amendments thereto, there exists buildings, structures, uses and lots which were lawfully established prior to the adoption of this Chapter or amendments thereto, but which do not conform to the regulations contained within this Chapter. It is the intent of this Chapter to eliminate these non-conformities and to permit these buildings, structures, uses and lots to continue only until they are discontinued, damaged or removed except as provided herein. These non-conformities can be incompatible with the buildings, structures and land uses permitted by this Chapter in certain zoning districts. In addition, these non-conformities may not be compatible with the City's Comprehensive Land Use Plan. It is the further intent of this Chapter that such non-conformities shall not be enlarged, expanded or extended except as provided herein, nor to be used as grounds for adding other buildings, structures and uses prohibited elsewhere in the same district.