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Resolution No. 983 <br />• Page 3 <br />2. Cont. <br />B. If no water remains in the hole after the overnight swelling <br />period, add 6" of clear water above the fine gravel. Every <br />30 minutes, measure the drop in water level to the nearest <br />1/16". Continue the percolation rate measurements until <br />the extremes of three consecutive measurements vary by no <br />more than 10%. Refill the .hole as often as necessary to <br />bring the water to 8" above the bottom. <br />C. In sandy soils (or other soils in which the first 6" of <br />water seep away in less than 30 minutes after the overnight <br />swelling period), allow 10 minutes between measurements. <br />Continue the tests until the extremes of three consecutive <br />measurements vary by no more than 10%. <br />A log shall be kept and submitted of all percolation tests <br />showing diameter and depth of hole, soil profile percolation <br />rate expressed in minutes per inch and ground water conditions <br />if encountered. <br />3. Revise Part IV, Section 2 Standard System Design, Item 1(c) <br />isto read: <br />Septic tanks shall be placed so that access is convenient for the <br />removal of liquids and accumulated solids. The tanks shall be <br />placed on,firm and settled soil capable of bearing the weight <br />of the•tank and its contents. Minimum setback distances for <br />tanks shall be the same as for treatment areas, with this <br />exception: minimum tank setback from buildings - 10 feet. <br />4. Add Item 1(d) <br />Site -constructed concrete block tanks shall be allowed only <br />where topography or other site factors preclude the use of <br />precast concrete, sectional, or fiberglass tanks. <br />S. Revise Item 3(a)to read: <br />All treatment areas shall be setback the following horizontal <br />distance from the features given below: <br />Feature Minimum Setback Distance (Feet) <br />-Property Lines and Buried Pipes <br />Distributing Water Under Pressure 20 <br />-Water Supply Wells or Buried Water <br />• Suction Pipes 75 <br />-Lakes, Streams and Wetlands 75 <br />-Buildings, paved areas & other hardcover 20 <br />-Vertical Separation between Bottom of <br />Filter Rock and Seasonal High Water Table <br />or Bedrock 3 <br />