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<br /> � '"^� � PRESSURE DISTRIBUTION: ' �
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<br /> `���"� ' Effluent shall be distributed ovcr the filter materiai by three 2 inch diameter perforatzd pipes
<br /> � �`^t� ` under pressure 73 feet long. Pe r foration ho les shall be 7/32 inch diamc+.;:r drillod in a straight
<br /> ��' line along the length of the pipe. Hole spacing shall be 36 inches with l5 perforation per lateral.
<br /> ��; Holes shall be drillcd straight into the pipe and not at an angle. A sharp diill shall be used and
<br /> � any burrs in the inside of the pipe shall be removed. The perforated pipe laterals shall be
<br /> installed level with the perforations downward.
<br /> The perforated pipe laterals shall bc connected to a 2—inch diamcter manifuid pipe and shall have
<br /> thcir ends capped. The laterals shall be spaced 40 inchcs on c:enter and at 20 inches from the
<br /> edge of the filter material.
<br /> The manifold pipe shall be cormected ro the supply pipe f.rom the pump. The manifotd shal! be
<br /> sioped toward the suppiy pipc from the pipe.
<br /> � Straw marsh hay to an un—compacted depth o� 3 to 4 inches shall be placed over the filter
<br /> material. A layer of untreated building paper(red rosin) shal( bc placed over the hay or straw.
<br /> ' Gco—Textile material if appr�vcd by the City Building Inspector may also be used.
<br /> �
<br /> Construction vehicles shall not be allowcd on thc filter material until backfill is placed.
<br /> �.�` Sandy loam soil shall be placed on the filicr material to a depth of 12 inches in the center of the
<br /> mound and to a depth of 6 inches et the sides.
<br /> Six inches of topsoil shall be p;aced on the fi(1 n�aterial over the entire azea of the mound. A
<br /> � grass cover shall be established over the cntirc area of thc mound. No shrubs shall be pianted
<br /> on the top of thc mound. Shrubs may be pia�ed at the foot ard side slopes of tha �nound.
<br /> ��: The, sidc slopes of thc mound,uill bc 5 fect horizantal to 1 foot vcrtical (5:1). This gentle slopc
<br /> �`�r will allow easy mowing of the grass cover. The soil material at the toe of the dike should be
<br /> slightly less permeable or somewhat tighter than ths natural soil bclow the mound. This can be °
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<br /> �;_ accomplished by selecting a fine: soil or by compaction. ; �"�� �..
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<br /> Whcnever mounds are located on slopcs, a diversion shall bc constructcd immediately up slopr,
<br /> from the mound to intercept and divert runoff. i;
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