Comp Plan 1974-1977 FILE #1 - Laserfiche WebLink

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(a) Table 4-1 is based on a sewage flow of 200 gallons per day per bedroom and shall be used as the basis for sizing household systems. (b) In every case sufficient area shall be provided for at least two bedrooms in dwellings. (c) 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 percentages: 20 percent for 12 inches of filter material below the distribution pipe; 34 percent for 18 inches; and 40 percent for 24 inches. The filter material shall completely encase the disposal pipes to a depth of at least two inches. (d) Soil is unsuitable for standard system if percolation rate is less than 1/2 minute per inch. See Section ~.07 (e) Consider sewage treatment units for problem soils with this percolation range. See Section 4.07. b. Location. 1. On slopes in excess of 12 percent, the soil profile shall be carefully evaluated in the location of the proposed soil treatment area and downslope to identify the presence of layers that may cause sidehill seepage. In no case shall a trench be located within 15 feet of such a layer surfacing on the downslopeo 2. Bed construction shall be limited to areas having natural slopes of less than six percent. 3. Any soil treatment area other than seepage pits shall be set back the following distances from the features given below: Feature Set Back Distance in Feet Water supply well less than 50 feet deep and not encountering at least ten feet of impervious material 100' Any other water supply well or buried water suction pipe 5O Buried pipe distributing water under pressure lO Building 2O Property lines 10 *Required for rmw developments, and where practicable, for existing developments 14