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to a depth at least 5 feet below any proposed soil treatment <br />system. If a water table or soil mottling is encountered at a <br />depth less than 5 feet, the boring shall be continued to a depth 2 <br />feet below the highest water table or mottling indicator. <br />The number of soil borings necessary for the <br />site evaluation report listed below is the minimum requirement. <br />Additional borings may be requested by the City due to questionable <br />soils. <br />(a) lor new systems, at least three S3il <br />borings shall be made within the primary drainfarea and three <br />soil borings within the alternate drainfield area. <br />(b) For replacement systems, at least <br />three soil boring;? shall be made in the proposed replacement area. <br />(c) For additions to existing systems, at <br />least one soil boring shall be made in the expansion area. <br />2. Percolation Tests. The number of <br />percolation tests required for the site evaluation report listed <br />below is the minimum requirement. Additional percolation tests may <br />be requested by staff due to questionable soils. <br />(a) For new systems, at least three <br />percolation tests shall be made within the primary drainfield area <br />And three percolation tests within the alternate drainfield area. <br />(b) For drainfield replacements at least <br />three percolation tests shall be made in the expansion area. <br />(c) For additions to existing systems, at <br />least one percolation test shall be made in the expansion area. <br />3. Plot Plan. A scale drawing of the entire <br />lot showing the following: <br />a. <br />b. <br />c. <br />d. <br />e <br />f. <br />All property lines and lot dimensions. <br />All existing and proposed structures. <br />All existing or proposed well locations, or water oupply <br />piping. <br />Relative elevations of house, lot cornerr and drainfield <br />g- <br />h. <br />areas. <br />Slope of ground at drainfield sites by contour lines or <br />direction arrows and slope percentages. <br />Location of all percolation test holes and soil borings <br />with identifying symbols and relative ground elevations <br />of each. <br />Primary and alternate drainfield areas identified. <br />Distance from primary and alternate drainfield areas to <br />property lines, well locations, and any lake, stream, <br />marsh or drainage channel within 16 ft. of any part of <br />the system. <br />B. System Design. System u'sign specifications <br />shall Include proposed flows or other sizing information, »inimum <br />sewage tank capacity, minimum soil treatment area requirements, a <br />plan of the component layout, and all other information necessary <br />to assure the City that the system is designed and will be