Sec. 470.301. - When authorized.

A septic tank system may be used for the disposal of sewage waste only if all of the following conditions are met: (a) No sanitary sewer of a sewerage system is available in an easement or right-of-way abutting the property or within 100 feet of the property. (b) Either: (1) The soil is replaced by a soil absorption bed meeting the standards of this Chapter; or (2) Soil on the premises has characteristics meeting the standards of satisfactory quality in this subsection from the surface to a depth of six feet and is free of impervious soil such as clay, muck, hardpan, silt, marl, rock and other unsuitable materials. The following soil classifications are a part of the United States Soil Classifications System adopted by the United States Corps of Engineers and Bureau of Reclamation in January 1962: Group Symbol Characteristics of Soil Group Satisfactory GW Well-graded gravels, gravel-sand mixtures, little or no fines GP Poorly graded gravels or gravel-sand mixtures, little or no fines SW Well-graded sands, gravelly sands, little or no fines SP Poorly graded sands or gravelly sands, little or no fines Doubtful GM Silty gravels, gravel-sand-silt mixtures GC Clayey gravels, gravel-sand-clay mixtures SM Silty sand, sand-silt mixtures SC Clayey sands, sand-clay mixtures ML Inorganic silts and very fine sands, rock flour, silty or clayey fine sands or clayey silts with slight plasticity CL Inorganic clays of low to medium plasticity, gravelly clays, sandy clays, silt clay, lean clays OL Organic silts and organic silty clays of low plasticity MH Inorganic silts, micaceous or diatomaceous fine sandy or silty soils, elastic silts Unsatisfactory CH Inorganic clays of high plasticity, fat clays OH Organic clays of medium to high plasticity, organic silts PT Peat and other highly organic soils   Soils classified as satisfactory meet the standards of this subsection. Soils classified as doubtful may be either approved or disapproved by the Director as meeting the standards of this subsection, based upon a consideration of the other standards provided in this Chapter and other on-site conditions. Soils classified as unsatisfactory do not meet the standards of this subsection. (c) Ground water table elevation on the premises, during the wettest season of the year, is at least 36 inches below the finished grade of the building site. (d) The percolation test rate does not exceed 15 minutes per inch. (e) The premises are not subject to flooding. (f) The septic tank system can be located so that no part of it is: (1) Laterally within 75 feet of any individual water supply well or within 100 feet of any public water supply well. (2) Where ground slope permits, at a higher elevation than water supply wells in the vicinity. (3) Within 50 feet of the high waterline of lakes, streams, canals or other bodies of water. (4) On a filled lot, unless the lot has been thoroughly and mechanically compacted, or allowed to settle for at least six months. (5) In a low swampy area with a high water table, whether permanent, fluctuating or seasonal. (6) Under a building or within five feet of it. (7) Within ten feet of a water supply pipeline. (8) Within five feet of a property line. (g) No part of the absorption area is located under a paved area. (h) The minimum available land area for a replacement absorption area, no part of which is located within the areas described in subsection (f) of this Section, is: (1) For residences and multiple dwellings, 150 square feet per bedroom. (2) For other land uses, two times the required absorption area. (i) The septic tank system can be located so that no part of any other septic tank system is located closer to it than 50 feet. For this purpose there shall be disregarded: (1) All septic tank systems installed before December 1, 1970. (2) Relocation of an absorption area on the premises of its original location. (Ord. 70-650-526; Ord. 71-435-150, § 2; Ord. 71-397-181; Ord. 78-1109-607, § 1; Ord. 83-591-400, § 1) Note— Former § 624.301.