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• <br />SPECIFICATIONS <br />PROPOSED ON-SITE SEWAGE DISPOSAL SYSTEM <br />TRACT D R.L.S. 1275 PLOT 43152 PARCEL 4000 <br />ORONO, MINNESOTA <br />SEPTIC TANK - Two 1000 -gallon capacity tanks, in series <br />manufactured and installed in compliance <br />with Village code. See Figure 2 for lo- <br />cation. <br />DOSING CHIMER - One 250 -gallon capacity tank downstream <br />from the second septic tank manufactured <br />and installed in compliance with Village <br />code for septic tanks, including a pump or sip.ion <br />with discharge rate between 25 and 45 gpm. <br />The purpose of the dosing chamber is to <br />deliver septic effluent to the drainfield <br />in periodic doses of 150 to 175 gallons <br />at rates between 25 and 45 gpm, rather <br />thc.n in smaller more frequent applica- <br />tions. See Figure 2 for location. <br />DRAINFIELD Proposed total drainfield area is 1463 <br />square feet. Proposed drainfield trench <br />bottom width is four (4) feet requiring <br />366 lineal feet of drain tile. <br />Because of surface slopes a single drair.- <br />field system with drop boxes is proposed <br />where drain tiles are laid flat along the <br />contour in four runs of 92 feet (place a <br />drop box in the middle of each run). <br />Effluent is to carried by solid, six-inch <br />diameter, plastic pipe directly to Cie <br />first drop box thence to succeeding <br />lower drop boxes with all elbows and con- <br />necting pipes to consist of solid, six- <br />inch diameter plastic pipe. The end of <br />each run of perforated pipe is to be cap- <br />ped or plugged. <br />There shall be undisturbed earth between <br />trenches at least as high as the elevation <br />of the top of the rock in the uphill <br />trench of adjacent trenches. There shall <br />b,2 undisturbed earth under the supply line <br />between drop boxes at least as higr as the <br />middle of the trench pipe in the uphill <br />trench adjacent trenches. <br />