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§ 8.30 <br /> <br /> total area selected for the mound, including the area <br /> under the banks. <br /> b) The total area selected for the mound, including the <br /> dikes, shall be plowed to a depth of at least 8 inches. <br /> Farrows shall rum perpen~cular to the direction of <br /> slopes. All furrows shall be thrown uphill and there <br /> shall be no dead furrow under the mound. The soil <br /> shall be plowed only when the moisture content of a <br /> fragment 8 ~nches below the surface is be]ow the plastic <br /> limit. <br /> c) In soils having percolation rates faster than 15 minutes <br /> per inch (s~ndy loams) Ln the top 8 inch depth, disking <br /> may be used for surface preparation as a substitute for <br /> plowing. <br /> d) Mo,~nd construction shall proceed immediately after <br /> surface preparation is 6ompleted. <br /> e) The origin~l so{1 must not be excavated or moved more <br /> than 1 foot from its original location during soil surface <br /> preparation. <br /> <br />13. A m~nimu~ of 12 inches of soil defined as sand shall he <br /> placed where the filter mater~al is to be located. A crawler <br /> tractor v~ith a blade sh~l] be used to move the sz~d ~nto place. <br /> At least 6 ~nches of sand shall be kept under the tracks to <br /> minimize compact[on of the plowed layer. The sand layer <br /> upon which the falter material is placed shall be level. <br /> <br />14. A depth of at least 9 inches of fdter material shall be placed <br /> over the bed area below the distribution pipe. <br /> <br />15. Distribution of effluent over the filter material shall be 1.25 <br /> inch d~ameter perforated pipe under pressure from a <br /> manifold. <br /> <br />16. The quantity of effluent per p~mp dose shall be at ]east 150 <br /> gallons per bedroom for dwellings. For other <br /> establishments, the dose shall be at least 25% of the <br /> estimated or measured daily sewage flow. <br /> <br />17. At least 2 inches of ~lter material shall be placed over the <br /> distribution pipes. The top of the filter mater~al shall be ]eve] <br /> in all directions. <br /> <br />1S. Straw or marsh hay to a_n u_ncompacted depth 4 inches shall <br /> be placed over the filter material. <br /> <br />19. Construction vehicles shall not be allowed on 'the filter <br /> material until backfill is placed. <br /> <br />] <br />] <br /> <br />Printed 1~28/90 <br /> <br />Page 257 <br /> <br /> <br />