1993-005688 - septic system - Laserfiche WebLink

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Koch's Soil Testing P.O. Box 81 Loretto, MN 55357 TO (612) 479-2637 To: Larry Anderson 1909 Shorewood Ln H 472-6262 Mound, Mn 55364 W 472-5580 Job: 745 Orchard Park Rd GENERAL INFORMATION This on site sewage treatment system is designed for a type I 4 bedroom home or 600 gal/day maximum. Construction should be started only after reviewal by local building inspector and after obtaining the permit. Construction should be done in accordance with the Minnesota Pollution Control Agency charter 7080 and local ordinances by a M.P.C.A. certified contractor. The soils on this site are mapped as Erin clay loam. Mottling indicates a seasonally saturation soil at 28" . Therefore a pressurized mound will need to be installed. The mound rock bed must be installed at least 3 ' above this seasonally saturated soil. , The soils at a depth of 12" have a percolation rate averaging 400Iminutes per inch and are adequate for treating septic effluent. NOTES Keep all heavy equipment off the proposed treatment area before and after construction as much as possible. The treatment area must be marked off before construction. SOIL SURFACE PREPARATION The discharge pipe from the pump ic) the mound area shall be installed before soil surface prepa'.ation. The trench excavated to install the discharge pipFi shall be carefully backfilled and compacted to prevent se,,Inage of effluent. The total area selected for the mound, including that under the dikes, shall be roughened to thoroughly break up any existing sod layers and to provide a suitable transistion zone between the original soil and sand layer of the mound. The area shall be roughened only when the moisture content of the soil 8 inches below the surface is drier than the plastic limit. Back hoe teeth may be used to rtughen the soil surface and break up the sod layer. Care must to taken so as not to compact or puddle deeper soil layers . Tn no case shall any surface soil be excavated and removed „_rom the area.