1993-07-12 Septic System Site Eval & Testing

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PRESSURE DISTRIBUTION: Effluent shall be distributed over the filter material by three 1 1,2 inch diamcter perfurated pipes under pressure 98 feet long. Perforation holes shall be 1/4 inch diameter drilled in a straight line along the length of the pipe. Hole spacing Shall be 60 inches with 25 perforation per lav!ral. Holes shall be drilled straight into the pipe anI not at an angle. A sharp drill shall be used and any burrs in the inside of the pipe shall be removed. The perforated pi,)c laterals shall be installed level with the perforations downward The perforated pipe laterals shall be connected to a 2-inch diameter manifold pipe and shall have their ends capped. The laterals shall be spaced 40 inches on center and at 20 inches from the edge of the filter material. The manifold pipe shall be connected to the supply pipe from the pump. The manifo!d shall be sloped toward the supply pipe from the pipe. Straw marsh hay to an un-compacted depth of 3 to 4 inches shall be placed over the filter material. A layer of untreated building paper (red rosin) shall be placed over the hay or straw. Geo-Textilc matcrial if approved by the County Building Inspector may also be used. Construction vehicles shall not be allowed on the filter material until backfill is pla. cd. Sandy loam soil shall be placed on the filter matcrial to a depth of 12 inches in the center of the mound and to a depth of 6 inches at the sides. Six inches of topsoil shall be placed on the fill matcrial over the entire area of the mound. A grass covci shall be established over the entire area of the mound. No shrubs shall be planted on the top of the mound. Shrubs may be placed at the foot and side slopes of the mound. The side slopes of the mound will be 5 feet horizontal to 1 foot vertical (5:1). This gentle slope will allow easy mowing of the grass cover. The soil material at the toe of the dike should be slightly less permeable or somewhat tighter than the natural soil below the mound. This can be accomplished by selecting a finer -oil or by compaction. Whenever mounds arc located on slopes, a diversion shall be constructed immediately up slope from the mound to intercept and divert runoff. PUMP AND COLLECTION TANK: A pump shall be used to deliver : fflucni to the mound. The pump shall be cast iron or bronze fitted with stainless steel screws or constructed of other sound, durable and corrosion resistant materials. PAGE 4