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<br /> <br />34 <br /> <br />TABLE V <br />Maximum Allowable Number of One-Fourth Inch Diameter or Smaller <br />Perforations Per <br />Pipe Diameter, Nominal and Inside <br />Perforation <br />Spacing in Ft 1” <br />1.049 <br />1-1/4” <br />1.380 <br />1-1/2” <br />1.610 <br />2” <br />2.067 <br />2.5 8 14 18 28 <br />3 8 13 17 26 <br />3.3 7 12 16 25 <br />4 7 11 15 23 <br />5 6 10 14 22 <br /> <br /> 10. The distribution pipes shall be laid level or <br />on a uniform slope away from the <br />distribution device of no more than 4 <br />inches per 100 feet. <br /> <br /> 11. The distribution pipes in beds shall be <br />uniformly spaced no more than 5 feet apart <br />and not more than 30 inches from the side <br />walls of the bed. <br /> <br />12. The filter material shall completely encase <br />the disposal pipes to a depth of at least 2 <br />inches. <br /> <br /> 13. The filter material shall be covered with <br />untreated building paper or a two-inch layer <br />of hay or straw or similar, permeable <br />materials The filter material shall be <br />covered with an unwoven geo-textile fabric <br />or a similar, permeable material approved <br />by the designated Health Officer. <br /> <br /> 14. The trenches or beds shall be backfilled <br />and crowned above finished grade to allow <br />for settling. The top 6 inches of soil shall