2004-P07740 - septic - Laserfiche WebLink

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STTE EVALUATION REPORT For Brian and Nancy Siska Sewage Treatment System Page- 3 Disking may be used for surface preparation as a subsritute for mold board plowing in soils having percolation ra.tes faster than 15 minutes per inch(sandy loam)in the top 8 inch depth. Back hoe teeth may be used to roughen the soil surface and break up the sod layer. Care must be taken so as to not compact or puddle deeper soil layers. In no case shall any surface soil be excavated and removed from the area. Mound construction shall proceed immediately after surface preparation is completed. Every effort should be taken to prevent ra.in from falling on the prepared soil surfa.ce, ONSTR TI N MATERIAL A1VD p ED S: DISTRIB ON F EFFL A minimum of 12 inches of soil defined as sand shall be piaced where the filter material is to be located. A crawler tractor with a blade or bucket shall be used to move the sand into place. At least 6 inches of sand shall be kept under the tracks to minim»e compacting of the plowed layer. The sand layer upon which the filter material is placed shall be level. Sand is defined as a soil texture composed by weight of at least 25 percent of very coarse and medium same, varying in size from 2.0 to 0.25 mm, less than 50 percent of fine or very fine sand rang�ng in size between 0.25 and 0.05 mm, and no more than 10 percent of particles smaller than 0.05 mm. A minimum depth of 9 inches of filter material(rock) shall be placed on the sand layer prior to installing the distn'bution pipe. Filter material is defined as clean rock, crushed igneous rock or similar insoluble, durable and decay- resistam material free from dust, sand, silt or clay. The size shall range from 3/4 inch diameter to 2 �h inch diarnetter. PRESSURE DISTRIBUTION: Effluern shall be distributed over the filter material by three 1-1/2 ineh diameter perforated pipes under pressure 72.5 feet Iong. Perforation holes shall be 1/4 inch diameter drilled in a straight line along the length of the pipe. Hole spacing shall be 30 inches with 30 perforation per lateral. Holes shall be drilled straight urto the pipe and not at an angle. A sharp drill s,hall be used and any bwrs 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 mazufold pipe and shall have their ends capped. The laterals sball 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 towazd the supply pipe from the pipe. Geo-textile material shall be placed over the filter material.