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An Expansion of Soil Engineering Services, Inc <br />ANNEAPOIIS/ST. PAUL 6600 S. County Rd.16, P.O. Boa 35100, Mpis., Mn. 5$435 / 612.941.5600 <br />ORTHERN MINNESOTA 3210 E. 19th Avenue, Hibbing. Mn. 55746 / 216-263.6669 <br />june 9, 1977 <br />Nitz, Inc. <br />1989 Faegerness °oint Road <br />Wayzata, Minne d 55391 <br />G._ntlemen: <br />Hmult <br />ENGINEERING TESTING <br />s aeapwr t. Arar.a►nr <br />r w .wotltsow. V,n <br />c G U. I. E Vi Ara E,rrrr ,m <br />Re: 77-159 $ 77- .99 <br />Proposed Drainfield System <br />Lot 3, Block 1 $ Lot 4, Block <br />Farview Addition <br />Orono, Minnesota <br />As requested, please ad copies of the proposed drainfield <br />systems for the above mentioned lots. The systems were set <br />up based on the results of the recent percolation tests and <br />in accordance with the "Code of Minimum Standards" as set <br />forth for individual sewage disposal systems for the Village <br />of Orono. <br />The Village of Orono recommends •t each single family <br />residence shall be equipped wit.. o septic tanks, the first <br />of which shall not be less than 750 gallon capacity and the <br />second tank not less than 500 gal�on capacity. If garbage <br />disposal units are used, the first tank shall be of 1000 <br />gallon capacity. The location of the disposal drainfield <br />shall be in an unobstructed and preferably unshaded area and <br />shall be placed no less than 10 feet from.occupied buildings. <br />property lines, or buried p-pe, distributing water under <br />pressure and 75 feet from any water supply well or buried <br />water suction pipe. Disposal trenches shall have a depth of <br />24 inches and not j exceed 36 inches. Trench width shall <br />be 30 inches and with 7 feet center to center minimum <br />spading of lines. <br />Lot 3, Block 1: The disposal system designed for Lot 3, <br />Block ylerTs residence) was set up based on the results <br />of percolation tests P-5 through 1'-8, which indicated an <br />average of 22 minutes per inch (mpi). For this system, a <br />total of 220 li:.-al feet of absorptive trench per bedroom is <br />then necessary. Based on a 3-bedroom home, a total of 660 <br />lineal feet of absorptive trench was then utilized in the 7 <br />design of the system. In order to n.eet the minimum require- <br />ments, the design system consists of 5 trenches, S5 feet in <br />CONSULTING ENGINEERS/SOILS AND MAIERIALS <br />Test Elonngs • Foundation Engmeennq and Recommer—axons a Inspection o; Construction • Material Testing of Smis. Concrete and Building I ompenents <br />