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• a <br /> y > <br /> rt <br /> SK 2 - Geophysical Exploration <br /> e to thepresence of shallow bedrock, a seismic refraction survey will <br /> conducted at the site to determine the thickness of soils overlying <br /> rd. sandstone. In addition, the survey will indicate the rippability <br /> the underlying rocks. This data will provide an indication of the <br /> unt of soil available for landfill cover material and for <br /> structures, if required. retention <br /> TASK <br /> 3 - <br /> Seismicity Study <br /> The seismicity of the site and vicinity will be evaluated to determine <br /> the Maximum probable Earthquake and its expected peak ground accelera- <br /> tion. The study will consider regional as well as local seismic condi- <br /> tions. The information developed in this study is to be used to perform <br /> stability analyses of intermediate and final landfill, embankment a <br /> cut slopes, and to design stable leachate control and associated'fea- <br /> tures. <br /> TASK 4L- Exploratory Drilling <br /> f• <br /> a <br /> Six aory borings will be drilled to complement the six burins <br /> F k that have already been drilled at the site. Proposed approximate g <br /> tions are shown on Figure II-1. Three borings will be approximately <br /> 40 feet deep and three others will be approximately 135 to 160afe t <br /> Y deep. The three deep borings will be converted to monitoring wells and <br /> two of the shallow borings will be converted to <br /> permeameters. With <br /> ,g= these borings we will (1) confirm the thickness of soil overlying bed- <br /> rock,, (2) describe encountered soils (using the Unified Soil Classifi- <br /> cation System) and bedrock, (3) obtain representative'a p ive soil, bedrock, and <br /> ground-water samples for testing, and (4) explore ground-water condi- <br /> tions. <br /> a <br /> a. .� . <br /> PRA 8610-22D I <br /> 1-3 <br /> 'Yy;= <br /> Emcon Rssociotes <br />