Ordinance - #89-21 - 09/12/1989 - Laserfiche WebLink

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150.01.4F - FINAL TREATMENT AND DISPOSAL - STANDARD SYSTEM Final treatment and disposal of all sewage tank effluent shall be by means of soil treatment and disposal. Subd. 1 - Sizinq 1. The required soil treatment area shall be determined by number of bedrooms for dwellings and definition of "water usage" for other establishments. 2. The minimum soil treatment area required for any dwelling shall provide for at least two (2) bedrooms. 3. The minimum soil treatment area required for multiple residential units shall consist of the sum of the areas required for each individual unit. 4. Trench and bed size shall be at least as large as set forth in Table II. TABLE II Required Soil Treatment Area in Square Feet of Trench Bottom Percolation rate in min- utes per inch Faster Than 0.1 (d) 0.1 to 5(e) 6 to 15 Percolation rate in min- utes per inch Per Gallon of Sewage Flow per day Depth of Filter Material Below Distribution pipe (c) 6" 12" 18" 24" Special Soil Treatment Required. See Section 0.83 170 170 135 115 105 1.27 255 255 205 170 155 Per Gallon of Sewage Flow Depth of Filter Material Below per day Distribution pipe (c) 16 to 30 31 to 45 46 to 60 61-120 (e) 1.67 335 335 270 225 205 2.00 400 400 320 265 240 2.20 440 440 355 290 265 Table II is based on a sewage flow of two hundred (200) gallons per day per bedroom and shall be used as the basis for sizing household systems. In every case, sufficient area shall be provided for at least two (2) bedrooms in dwellings. For systems other than household systems, the required treatment area shall be based upon gallons of waste per day. The required treatment area may be reduced, for trenches only, by the following 2