2005-P09159 - new septic system - Laserfiche WebLink

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• � :�3 . , � C ,��l Co � � l Ingleside Water Supply Engineering Brian Van Beusekom Engineering & Irrigation Systems Construction, �IIC. � Test Borings TEL (763) 479-1869 P.O.Box 127 � FAX (763) 479-3161 �f��+s ��'� Dig. Pager (651) 908-4601 �l , _ 4920 Highway 55 �?� �ri Email bvanbeusekom C�?aol.com e � , LOretto,MN 5 Lar N 45°04.03",Lon W 83°38.95' � . -3_ �I�Np�i�11'i`�',� ,e em er 9,2005 Brad& Andrea Childs ,�,�� 70 2240 Devin Ln ,�pp4��, Orono, MN 55356 M��at�rS��s�+lea�t 8 0303 �� _ Job site: Same, �� GEN�RAL INFOKMATION This site has a 1979 era mounded absorption system with a 10'X 45' rock bed. The rock bed has soil badly mixcd in with the rock. Testing the distribution manifold proved that effluent was getting to the entire manifold, yet the effluent peculated to the surface before getting to remote areas of the rock bed. Only after 5 minutes would effluent begin to distribute to the entire rock bed. Installing a uew rock core was considered but borings into the underlying sand showed the sand bed to be limited dimension with very wet soil underneath. A new lager system for 5 bed rooms was desired too. Therefor�this on site sewage treatment system is designed for a type 1, 5 bedroom home with out a garbage disposal or 75U gal lons per day maximum use or an average use of 2/3 of this amount on day in day out basis.The tanks need to be kept shallow above the shallow seasonal ground water. Construction should begin only after reviewal by the local building inspector and after obtaining the permit. Construction should be done in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances by a MPCA cc;rtified contractor. The iniormation for this design is gathered from the several spots checked. lf the constructor discovers anything the spot findings(like springs high water table,high mottling, fill, etc),he shall consult with me immediat�ly to see if aily modification of the design is necessary. If he doesn't he is proceeding at his own risk. The constructor shall be allowed however to angulate the system to fit the nuances of the site. The suggested tank locations and well location can be modified.Just make sure all setbacks, pump requirements, draina�c; Irc�zing, etc. considerations are made. The soils on this site are mapped as LrB, lester loam). Mottling indicates a seasonally saturated soil at 18" on tl�c primary site. Therefore a pressurized mound is required. By code the mound rockbed must be installed 3' above this seasonally saturated soil. 1�he soils at a depth of 12" have an average percolation rate of 31 minutes per inch on the primary site and meet the guidelines for treating septic effluent. The design is based on the rate of 31 -45 MPI that is appropriate for loam classified top soil. NOTE The recipient of this report must see that some one fence off or whatever is necessary to keep the sites from being compacted. Driving over the site compacts the soil, decreasing its ability to treat effluent-even to the point of some lucal building official considering the site unsuitable. SOIL SUREACE PRLPARATION The total area selected for the mound shall be roughened up to thoroughly break up any sod layers and to provide a suitable transition zone between the original soil and the sand. The area shall be roughened only when the soil to 12" below the surface is drier than the ptastic limit according to AASHO designation: T 90- 61. Backhoe teeth or chisel type plowing may be used.Care must be taken so as not to compact or puddle deeper soils. In no case shall any surface soil be removed frorn the area.