Agenda - Council - 11/25/1997 - Laserfiche WebLink

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§ 8.30 I] b) In every case, sufficient area shall be provided for at least two bedrooms in dwellings. c) For systems other than household systems, the -equired treatment area shall 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; and 40`3b 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 0.1 minute per inch. e) Special requirem -ants 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 millimeters (sieve size 60), the required soil treatment area is 1.67 square feet per gallon of sewage flow per day. 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 sidehill 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 area shall be set back the following ristancPs from the features ai.ven below.. Featu e S.--laxick Distance in Feet Water supply well less than 50 feet deep and not 100* encountering at least 10 feet of impervious material Any other water supply well or buried water 50 suction pi e Buried pipe distributing water under pressure 10 Building 1 20 Property lines 1 10 *Required for neR, developments and, v;=here applicable, for e):.isting developments. C 1 -- I -- I -- I -- I Page 250 Printed 12; 28/90 t