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Ms. Polly Kratman GeoSyntec Consultants <br /> Indian River County <br /> 10 May 2006 <br /> Page 7 <br /> • Geotechnical laboratory analyses ; <br /> • Hydrogeological testing; <br /> • Field surveying; and <br /> • Preparation of a public and private water well survey. <br /> Each of these components is discussed below. <br /> Shallow Soil Borings: Five shallow soil borings will be drilled at the site using the hollow- <br /> stem auger (HSA) drilling technique at the locations shown in Figure 3 . Soil sampling and <br /> standard penetration tests (SPTs) will be performed using split-spoon sampling procedures <br /> (American Society of Testing and Materials (ASTM) D 1586) during drilling of the soil <br /> borings. Sampling will be performed at 2 . 5 ft intervals of depth and/or at changes in <br /> stratigraphy. Thin-walled, Shelby-tube samples will be taken within cohesive soils from <br /> four of the borings for evaluation of geotechnical properties of the foundation soils. <br /> Deep Borings: One geotechnical deep soil boring (SPT-3) will be drilled to a depth of <br /> approximately 90 ft below land surface (BLS) at the location shown on Figure 3 . The <br /> purpose of this deep boring is to obtain subsurface data for the geotechnical stability <br /> analyses required for the landfill expansion . This boring will be completed using the HSA <br /> drilling technique and SPT sampling procedures. The other deep boring (RB- 1 ) will be <br /> completed using the Rotosonic® drilling techniques to a depth of approximately 50 ft BLS . <br /> The primary purpose of this deep boring is to obtain a continuous profile of soil-rock <br /> samples to verify the lithologic-geologic model of subsurface materials at the site. A <br /> preliminary review of the lithologic information available from previous hydrogeologic <br /> and geotechnical investigations at the site indicated some variability and inconsistency of <br /> the site stratigraphy. Soil borings completed by Universal Engineering Testing Company <br /> in 1987 as part of the existing Class I landfill permit application indicated that the <br /> subsurface materials to depths of approximately 100 ft BLS were comprised of sands, <br /> shelly-sands, silts, with traces of clay within the upper portions of the geologic formation. <br /> However, documentation from the network of ground water monitoring wells at the site by <br /> CDM indicates significant variations in subsurface profile with a widespread vertically <br /> persistent clay layer and a weathered limestone bed in the geologic cross sections. <br /> XL06096VL60070.doc <br />