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a. Sizing. <br /> <br /> 1. The required soil treatment area shall be determined by number of <br />bedrooms for dwellings and definition of "water usage" for other establishments. <br /> <br /> 2. The minimum soil treatment area required for any dwelling shall provide <br />for at least two bedrooms. <br /> <br /> 3. The minimum soil treatment area required for multiple residential <br />units shall consist of the sum of the areas required for each individual unit. <br /> <br />4. Trench and bed size shall be at least as large as set forth in Table 4-1. <br /> <br />Table 4-1 <br /> <br />Percolation <br />rate in <br />minutes per <br /> inch <br /> <br />Faster than <br /> 1/2 (d) <br /> <br />1/2 to 5 (e) <br /> <br />6 to 15 <br /> <br />16 to 30 <br /> <br />31 to 45 <br /> <br />46 to 60 <br /> <br />Slower than <br /> 6O <br /> <br />Per gallon <br />of waste <br />per day (c) <br /> <br />Required Soil Treatment Area in Square Feet <br /> Per bedroo~ (a.) (~) <br /> Beds Trenches <br /> Depth of filter material <br /> below distribution pipe (c) <br /> in inches <br /> 6 I 12 i 18 24 <br /> <br />Special Soil Treatment Required <br /> <br />0.83 <br /> <br />1.27 <br /> <br />1.67 <br /> <br />2.00 <br /> <br />2.20 <br /> <br />170 <br /> <br />255 <br /> <br />335 <br /> <br />4O0 <br /> <br />440 <br /> <br />170 <br /> <br />255 <br /> <br />335 <br /> <br />400 <br /> <br />440 <br /> <br />Unsuitable for on-site system <br /> <br />See Section 4.07 <br /> <br />135 <br /> <br />205 <br /> <br />270 <br /> <br />320 <br /> <br />355 <br /> <br />115 <br /> <br />170 <br /> <br />225 <br /> <br />265 <br /> <br />290 <br /> <br />105 <br /> <br />155 <br /> <br />205 <br /> <br />240 <br /> <br />265 <br /> <br />13 <br /> <br /> <br />