1993 - Septic System info - Laserfiche WebLink

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PRESSURE DISTRIBUTION: _ Effluent shall be distributed over the filter material by three 2 inch diameter perforated pipes under pressure 48 feet long. Perforation holes shall be 1/4 inch diameter drilled in a straight line along the length of thc pipe. Hole spacing shall be 30 inches with 20 perforation per lateral. Holes shall be drilled straight into the pipe and not at an angle. A sharp drill shall be used and any burrs in the inside of the pipe shall be removed. The perforated pipe 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 manifold 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—Textile material if approved by. the County Building Inspector may also be used. Construction vehicles shall not be allowed on the filter material until backfill is placed. Sandy loam soil shall be placed on the filter material 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 material over the entire arca of the mound. A grass cover shall be established over thc entire arca 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 4 feet horizontal to 1 foot vertical (4:1). 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 soil or by compaction. Whenever mounds are 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 effluent 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