Procedure on Acceptance of Public Improvements. When the developer has constructed and installed the streets, drainage facilities, curbs, sidewalks, street signs, monuments and other improvements in accordance with borough regulations, standards and specifications, and desires the borough to accept the improvements, he shall, in writing, addressed to and in a form approved by the borough council, with copies thereof to the borough engineer, request the borough engineer to make a semi-final inspection of the improvements. If the improvements have been constructed under a performance guaranty after approval of a final plat, the developer shall submit an as-built plan showing as-built grades, profiles and sections and locations of all subsurface utilities such as french drains, combination drains, sanitary sewage disposal systems, both public and individual water lines and control valves, gas lines, telephone conduits, monuments, iron property markers, and any other utilities or improvements installed other than as shown on the approved final plat. The as-built plan shall be certified to by a licensed New Jersey professional engineer. If any improvements are constructed prior to final plat approval, the final plat shall reflect all changes and as-built conditions and be so certified. The as-built plans shall be submitted on reproducible media.