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