Agenda - Council - 12/20/1983 - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I ll. Soil surface preparation. a. The total area selected for the mound, including the dikes, shall be plowed to a depth of at least eight (8) inches. Furrows shall run perpendicular to the direction of slopes. All furrows shall be thrown uphill and there shall be no deadfurrow under the mound. The soil shall be plowed only when the mois- ture content of a fragment e~ght (8) inches below the surface is below the plastic limit. b. In soils having percolation rates faster than fifteen (15) minutes per inch (sandy loams) in the top eight (8) inch depth, disking may be used for surface prep- aration as a substitute for plowing. c. Mound construction shall proceed immediately after surface preparation is completed. 12. A minimum of twelve (12) inches of soil defined as sand shall be placed where the filter material is to be located. A crawler tractor with a blade shall be used to move the sand into place. At least six (6) inches of sand shall be kept under the tracks to minimize compaction of the plowed layer. The sand layer upon which the filter material is placed shall be level. 13. A depth of at least nine (9) inches of filter material shall be placed over the bed area below the distribution pipe. 14. Distribution of effluent over the filter material.shall be either by four (4) inch distrib~tion pipes with gravity flow from a distribution box or by one and one-fourth (1-1/4) inch diameter per- forated pipe under pressure from a manifold. 15. Gravity distribution. a. The four (4) inch distribution pipes shall be rigid plastic with boles at least one-half (1/2) inch dia- meter spaced no further than thirty-six (36) inches. One (1) row of holes shall be laid at the bottom of the pipe. b. The distribution pipe shall slope downward two (2) inches per one hundred (100) feet away from the dis- tribution box. c. The far ends of the distribution pipe shall be con- nected. d. The distribution pipes shall be spaced no further than five (5) feet apart and no further than thirty (30) inches from the edge of the filter material. e. The distribution pipes shall connect to the outlets of a distribution box. 16. The quantity of effluent per pump dose shall be at least one hundred fifty (150) fallons per bedroom for dwellings. For other establishmen~.~, the dose shall be at least twenty-five percent (25%) of the estim;~ted or measured daily sewage flow.