The following requirements shall govern sanitary sewer improvements.
(A) Where an adequate public sanitary sewer system is reasonably accessible in the determination of the City Council, 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 city standards and the State Department of Environmental Quality and the Department of Health. Combinations of sanitary sewers and storm sewers shall be prohibited.
(B) Where a public sanitary sewer system is not reasonably accessible, the subdivider may provide:
(1) A central treatment plant, provided that the central treatment plant is installed in accordance with the City and State Department of Environmental Quality and Department of Health requirements; or
(2) Lots may be served by individual disposal systems, if the provisions of the following section are met.
(C) (1) Where the installation of individual disposal systems is considered, the suitability of the soil for individual systems, the absorptive ability of the soil, surface drainage, ground water 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 and the State Department of Environmental Quality and Department of Health.
(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 buildings. The lot size and shape shall conform to the requirements of the zoning district in which they are located; provided that, in no case shall the minimum lot be less than one acre in area where there is a public water supply available at the lot and two and one-half acres where there is not public water supply available.
(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 City Council.
(Prior Code, § 9.3)