Purpose. The intent of the Residential/Industrial Overlay Area is to provide a conditional development option for a portion of the Industrial Zone as indicated on the Zoning Map. This option permits the limited development of residential use under specific conditions in exchange for the preservation of a portion of related property as open space. The purpose of this option is to encourage the preservation of that portion of Block 19, Lot 51, identified on the Zoning Map with the R/I Overlay, which is bordered by residential use, as permanent open space. In exchange, the owner of said lot may develop up to three residential dwellings in the R/I Overlay Area in accordance with the conditions set forth herein. The remaining open space property may be used in the computation of permitted floor area and impervious coverage for the remainder of Lot 51, of which it is a part, which is located outside of the R/I Overlay Area.