Persons requesting consideration for a reduction in the sewerage service charge because of water not entering the public sanitary sewerage system shall make written application to the Sanitary Board for such consideration, giving the name of the person, address, water board account number and supporting data fully describing other sources of water, if any, as well as disposition of water alleged not to be entering the sewerage system. The application shall be accompanied by a sketch to an approximate scale showing the plan of the property, water distribution system, sewer layout, existing meters and proposed meters in the scheme to determine the quantity of flow entering, or not entering, the sewerage system. The cost of furnishing, installing and maintaining any meters other than those utilized to measure water purchased from the Water Board shall be borne by the applicant. The type, size, location, arrangement and maintenance of such meters shall be subject to the approval of the Sanitary Board. (1969 Code §22-31)