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consolidation potential of these materials. Unconfined-compressive strength tests were also conducted on <br />samples of the bedrock materials to evaluate the strength of these materials. <br />Results of the swell-consolidation testing aze presented on Figures #5 through #10, and all of the other <br />laboratory test results are summarized in the attached Table 1. The laboratory testing was conducted in <br />general accordance with applicable ASTM specifications. <br />Subsurface Conditions <br />The subsurface conditions encountered at the site were somewhat variable and generally consisted of a <br />layer of fill materials overlying natural sands and clays and claystone-shale bedrock to the maximum depth <br />investigated, 24 feet. The logs of the exploratory test holes are shown in Figure #3, and the associated <br />Legend and Notes aze shown in Figure #4, <br />A layer of man-made fill was encountered at the ground surface in all of the test holes. The fill materials <br />extended to depths ranging from Ph to 6 feet beneath the existing ground surface. The fill materials were <br />variable in consistency and thickness, and generally consisted of clays mixed with coal which were low to <br />moderately plastic, loose to medium dense, moist and dazk brown to black in color. A layer of Limestone <br />gravel and cobble fill materials was encountered at the ground surface in test holes 3 and 4, and was <br />approximately 1 foot in thickness. Natural sands and clays were encountered beneath the fill materials in <br />test holes 2 and 7 and extended to depths of 3 and 17 feet, respectively. The sands and clays were fine to <br />medium grained with occasional sandstone fragments, low to moderately plastic, stiff to dense, moist and <br />brown to light brown in color. Samples of the natural sands and clays classified as CL to SC soils in <br />accordance with the Unified Soil Classification System. claystone-shale bedrock was encountered beneath <br />the fill materials in test holes 1, 3, 4, 5 and 6 and below the natural sands and clays in test holes 2 and 7 at <br />depths varying from 2 to 17 feet beneath the existing ground surface. The claystone-shale bedrock <br />materials extended to the maximum depth investigated in all of the test holes, 19 to 24 feet. The claystone- <br />shale bedrock materials were slightly sandy to sandy, fine-grained with occasional sandstone lenses, <br />moderately to highly plastic, weathered to very hazd, slightly moist to moist and brown to gray in color, <br />Samples of the claystone-shale bedrock materials classified as CL to CL-CH soils in accordance with the <br />Unified Soil Classification System. <br />Swell-consolidation tests conducted on samples of the natural clays and claystone-shale bedrock materials <br />indicate that these materials will exhibit a variable swell potential ranging from moderate to very high <br />when wetted under a constant load. The swell-consolidation test results are presented in Figures #5 <br />through #10 and summarized in Table A, which is shown below. All of the other laboratory test results are <br />summarized in the attached Table 1. <br />lob Number: 07-7442 NWCC, Inc. Page 3 <br />