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Au1ik Associates <br /> Proj ect BL-04-06716 <br /> October 11,2004 <br /> Page 3 <br /> I <br /> ` B.3. Soil <br /> The soil profile generally consists of approximately 2 1/2 to 4 feet of previously-placed fill underlain by <br /> I1 to 1 1/2 feet of swamp deposited soils overlying native granular soils extending to boring termination <br /> depths of approximately 20 feet below the existing grade. The exceptions being Borings ST-3 where <br /> � swamp deposited soils were not encountered beneath the fill and Boring ST-2 where a layer of sandy lean <br /> clay was encountered within the native granular soils at approximately 11 1/2 to 13 feet below existin� <br /> grade. <br /> � B.3.a. Fill Soils. The com osition of the reviousl - laced fill soils across the site was hi hl variable. <br /> P P YP g Y <br /> ( The fill ranged from organic clay to silty sand to lean clay with sand to sandy lean clay. The penetrarion <br /> kresistances within the previously-placed fill ranged from 2 to 3 blows per foot(BPF)indica�ing low in <br /> place densities. <br /> �. <br /> B.3.b. Swamp Deposits. T'he swamp deposited soils were encountered beneath the previously-placed <br /> � fill in Borings ST-1 and ST-2. 'The swamp deposited soils were generally comprised of organic clay or <br /> I peat. <br /> � B.3.c. Native Sands. Below the fill and swamp deposited soils, the borings typically encountered native <br /> sands ranging in composition from silty sand to poorly graded sand with silt. T'he sands had penetration <br /> t resistances ranging from 2 to 11 BPF indicating very loose to medium dense conditions. <br /> � <br /> B.3.d. Clay Soils. Borings ST-2 encountered a layer of glacial till clay within the native sand soils <br /> � from approximately 11 1/2 to 13 feet below the exisl-ing grade. T'he clay sample had penetration <br /> resistances of 6 BPF indicating medium conditions. <br /> � B.4. Groundwater <br /> � Groundwater was observed in all the bori.ngs. The groundwater was encountered at approximately 4 feet <br /> below existing grade during drilling and at elevations ranging from about 3 to 3 1/2 feet below existing <br /> grade after removal of the augers. These depths correlate to approximate ground elevations ranging from <br /> � about 927 to 927 1/2 based upon the provided benchmark elevation. Groundwater levels should be <br /> expected to fluctuate both seasonally and annually. <br /> l <br /> � <br />