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I Ii, KIIINII I P f R & AtiiCx I V]I ) <br />FIELD STUDIES <br />File No. S-2010-4 <br />January 22, 1974 <br />PAGE TWO <br />Two percolation test borings were drilled in the <br />proposed sewage effluent disposal area, to depths of 15 and <br />20 feet, respectively. In addition to the percolation <br />test holes, a single boring was drilled to evaluate the <br />depth of the groundwater table. The approximate locations <br />of the test borings are shown on Plate I. All borings were <br />made with 6 -inch diameter flight auger type drilling equipment. <br />The soil conditions encountered at the boring locations <br />consist of a surface stratum of black silty clay with <br />organics to a depth of approximately one-half foot. Below <br />that depth, the soil consists of interbedded strata or lenses <br />of sandy silt and silty fine sand to the depths explored. <br />Free groundwater was encountered during drilling at a <br />depth of 74 feet in Boring 1, on January 11, 1974. The <br />water level on January 14, 1974, was measured at a depth <br />of 46 feet below the presently existing ground surface. <br />In our opinion, this 46 -foot depth represents the approximate <br />static water level at this site. <br />PERCOLATION TESTS <br />Percolation tests were performed in Borings 2 and 3. <br />The borings were initially filled with water one day in <br />advance of the tests to presoak the soil. The tests were <br />performed by filling the holes with water to a fixed reference <br />point and allowing the water to percolate into the soil. <br />