The following requirements shall govern sanitary sewer improvements:
(a) Where an adequate public sanitary sewer system is reasonably accessible in the determination of the Planning Commission, public sanitary sewers shall be installed to adequately serve all lots, including lateral connections to the public system. Public sewer system extensions shall meet the requirements of the Ohio Environmental Protection Agency and City standards. Combinations of sanitary sewers and storm sewers are prohibited.
(b) Where a public sanitary sewer system is not reasonably accessible, the subdivider may provide:
(1) A central treatment plant for the group, provided that such central treatment plant is installed in accordance with Ohio Environmental Protection Agency and City Health Department regulations.
(2) Lots may be served by individual disposal systems, if the provisions of subsection (c) hereof are met.
(c) (1) Where installation of individual disposal systems is considered the suitability of the soil for individual systems, the absorptive ability of the soil, surface drainage, groundwater level and topography shall be the criteria for determining whether or not the installation of individual systems is permissible. Criteria shall be in accordance with the requirements of the City Health Department and the Ohio Environmental Protection Agency.
(2) Each lot so served shall be of a size and shape to accommodate the necessary length of tile field at a safe distance from and at a lower elevation than the proposed building. Such lot size and shape shall conform to the requirements of the zoning district in which they are located. If no zoning is in effect, the standards set forth in Section 1129.13
(c) shall be met.
(3) At least one percolation test shall be made for each lot area being platted and each test shall be located in close proximity to the proposed individual sewage disposal unit, be numbered and its location shown on the preliminary plat. All percolation tests shall be performed in accordance with the requirements of the Planning Commission and the City Health Department.
(4) Where the installation of individual disposal units is considered and where the average natural ground slope exceeds ten percent, the installation of a step-up disposal system may be required, subject to specification by the City Health Department. (Ord. 70-74. Passed 10-15-74. )