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). H. KLEINFELDER & ASSOCIATES <br />Ll <br />File No. S-1008-35 <br />May 17, 1985 <br />Page 8 <br />drilling equipment and MX diameter coring equipment. The test borings were drilled under <br />the direction of our field engineer who assisted in extracting relatively undisturbed samples <br />of the materials encountered and maintained a continuous log of the materials. Samples <br />were obtained by driving either a 2 -inch diameter modified Porter sampler or standard <br />penetration sampler into the materials using a 140 -pound hammer falling 30 inches +. The <br />number of blows required to advance the sampler are noted on the bogs of Borings, Plates VI <br />through X1, at the corresponding sample locations. Attempts to use MX diameter coring <br />equipment were made in Borings 1 and 3, however, the material was not sufficiently <br />cemented and poor recovery was noted. <br />Borings 2 and 5 were drilled through the existing landfill. Before extracting the <br />drilling equipment, concrete was placed inside the hollow stem augers and the augers were <br />gradually withdrawn. The amount of concrete backfill is noted on each boring. The <br />remaining test holes, Borings 1, 3, 4, and 6, were left open and covered for possible <br />reuse in a monitoring program. <br />SOIL CONDITIONS <br />In general, the soils encountered in Borings 1, 3, 4, and 6 consisted of grey -tan <br />to dark brown cemented sandy silt and clay soils with varied layers of gravel. The soils are <br />very hard and extend to the maximum depths explored. In Borings 2 and 5, approximately <br />47 and 65 feet, respectively, of garbage was encountered overlying the cemented sand, silt, <br />and clay soils. <br />A more detailed description of the materials encountered in the test borings are noted <br />on the Logs of Borings. All soils have been classified according to the Unified Soil <br />Classification System, which is described on Plate V. <br />