Agenda - Council - 06/10/1997 - Laserfiche WebLink

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§ 8.30 b) In every case, s;,flScient area shall be provided for at ( least two bedrooms in dwe)1~ngs. c) For systems other than household systems, the required treatment area sh~]] be based upon gallons of waste per day. The required treatment area may be reduced, for trenches only, by the following percentages: 20% for 12 inches of filter materials below the 'distribution pipe; 34% for 18 inches; -ud 40% for 24 inches. The filter material shall completely encase the disposal pipes to a depth of at least 2 inches. d) Soil is unsuitable for standard system if percolation rate is less than 0.I rn~nute per inch. e) Special requirements for treatment units for problem soils with this percolation range. For soils having more than 50% of very fine sand by weight, plus fine sand having a particle size range of' 0.05 millimeters (sieve size 270) to 0.25 r~]l~r~eters (sieve size 60), the required soil treatment area is 1.67 square feet per gallon of sewage flow. per day. Location. 1. On slopes in excess of 12%, the soil profile shall be carefully evaluated in the location of the proposed soil treatment area and downslope to 'identify the presence of layers with different permeabilities that may cause sidehitl seepage. In no case shall a trench be located within 15 feet of where such a layer surfaces on the downslope. 2. Bed construction shall be limited .to areas having natural slopes of less than 6%. 3. Any soil treatment ar. ea shall be set back the following distances from the features ~dven below. Dism,~ce in Feet Water supply well less than 50 feet deep and not 100' encountering at least 10 feet of impervious material 'Any other'~vater supply well or burie'd water .... 50 suction pipe ~Buried pipe distributing wat. e..r uJnder pressure 10 Buildin~ 20 Property lines ... 10 *Required for new developments and, where applicable, for existing developments. I I i I I I I I I I I I I I I Page 250 Printed 12/28/90