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preliminary sketch plan described in paragraph b above alono with an evaluation of <br />the following: preliminary plat, if applicable; flood plain and soil survey maps; <br />soil interpretation sheets; experience; and any other relevant information. If <br />this evaluation, in the opinion of the plumbing inspector yields enough information <br />and the site is suitable, approval may be given for the installation of the standard <br />system of Section 4.06, Ordinance No. 77- If the preliminary evaluation does <br />not produce sufficient information, a field e~aluation shall be required, includina <br />but not limited to slope and setback measurement, soil borings and percolation tests. <br /> <br /> d. If at any time during the course of the preliminary or field evaluation, <br />limiting characteristics for a standard system are discovered, the plumbing inspector <br />shall determine if an alternative site for a standard system is available on the <br />affected parcel of real property; and if such a site is available, then the plumbing <br />inspector shall conduct an evaluation of the alternative site. <br /> <br /> e. If a detailed field evaluation is deemed necessary, the plumbing inspector <br />shall employ the following procedures: <br /> <br /> (l) A preliminary soil boring shall be conducted in the center of the proposed <br />individual sewage treatment system in accordance with the procedures presented in <br />Section 8.08 hereunder. <br /> <br /> (2) If no limiting soil characteristics are revealed by the preliminary soil <br />boring, either a preliminary percolation test shall be conducted in accordance with <br />the procedures presented in Section 8.08 f or the percolation rate at the depth of <br />the proposed system shall be estimated from other available information. <br /> <br /> (3) The plumbing inspector shall determine preliminary treatment area size <br />based upon the measured or estimated percolation rate and other criteria presented <br />in Section 4, Ordinance No. <br /> <br /> (4) The plumbing inspector shall conduct at least one additional soil boring, <br />following procedures set forth in Section 8.08 f spaced equidistant across the pro- <br />posed area noting and recording soil texture. At least one boring shall be made at <br />the bottom of the lowest proposed trench or bed elevation. Each boring shall <br />represent no more than 500 square feet of lawn area on one soil type; a minimum of <br />two borings shall be made on each soil type. <br /> <br /> (5) If no limiting characteristics are found in the additional soil borings, <br />the plumbing inspector shall conduct at least one additional percolation test, <br />followino the procedures set forth in 'Section 8.08 f. Each test hole shall represent <br />no more than 750 square feet of lawn area on one soil type; a minimum of two per- <br />colation tests shall be conducted on each soil type. <br /> <br /> (6) Percolation rates shall be averaged by soil type. If all averages by soil <br />type are within 1/2 and 60 minutes per inch, installation of a properly desianed <br />standard system may be allowed. <br /> <br />f. Procedures for soil borings and percolation tests <br /> <br />(1) Soil borings <br /> <br />-2- <br /> <br /> <br />