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J. H. KLEINFELDER & ASSOCIATES <br /> File No. 5-2568-4 <br /> October 11, 1983 <br /> Page 4 <br /> soils encountered. The tests performed included Atterberg Limits, Grading Analysis, <br /> Hydrometer Tests, and R-Value Tests. The results of these tests are summarized on <br /> Plates IV and V. <br /> PERCOLATION TESTS <br /> A total of five percolation tests were performed. Each approximate 3-foot deep, <br /> 6-inch diameter test hole was lined with perforated Orangeburg pipe. The percolation <br /> holes were initially filled with water and allowed to soak for a period of 24 hours. <br /> The tests were performed by filling the hole with water to a fixed referenced point <br /> and allowing the water to percolate for a period of one hour. Each hole was then <br /> refilled and the process repeated. The percolation test data is presented on Table H. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Site Preparation and Grading <br /> Site preparation should include stripping and removal of all vegetation and debris <br /> from the construction areas. The actual depth of stripping should be evaluated in the <br /> field by a representaive of J. H. Kleinfelder do Associates. After the site has been <br /> cleared, and before the placement of any Engineered Fill, the exposed surface soil <br /> within and to a minimum of 5 feet beyond the building areas, should be scarified to a <br /> minimum depth of 6 inches and recompacted. In building areas, the recommended <br /> degree of recompaction of the dark-brown silty clay soil is between 85 and 95 percent <br /> of the maximum dry density as determined by the ASTM D-1557-70 test procedure. <br /> This recompaction should be done at a moisture content at least 5 percent over <br /> optimum. If any soft or loose soil pockets are found in the site stripping or <br /> recompaction process, they should be overexcavated and recompacted. <br /> It is our opinion that Engineered Fill can consist of the native silt and clay soils <br />