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1 6. v <br /> LNovember 3,2004 <br /> NOA Project Number: E040118A <br /> L5.1 Soil Boring Locations <br /> Four percolation test borings were excavated on the Site. All of the borings were drilled to depths <br /> Lbetween 3.0 to 3.5 feet below the ground surface (Plate 2). (5. <br /> L5.2 Soil Boring Dimensions <br /> The soil borings were between 3.0 to 3.5 feet deep and were 4-inches in diameter. <br /> 5.3 Soil Lithology Observed <br /> Generally, the soil encountered in the boring is similar to the soils reported by the San Joaquin <br /> LCounty Soil Survey for the area (USDA, 1992). Table 4 and 5 presents a representative soil log for <br /> the soil borings. (Ground water level was observed at four (4) feet in an adjacent soil boring.) <br /> Table 4. <br /> Soil Boring Log for 1S, and 4S <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-4 Gray-tan,fine to coarse sand with silt,slightly SM <br /> moist. Ground water at 4 feet below ground <br /> surface. <br /> Table 5. <br /> Soil Boring Log for 2S and 3S <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-4 Dark gray,clayey silt and peat,strong ML-OL <br /> decomposition odor,moist.Ground water at 4 <br /> feet below ound surface. <br /> 5.4 Discussion of Soil Lithology <br /> 1 6w A visual inspection of the shallow soils from on-site drilling indicates some potential for satisfactory <br /> percolation rate. A percolation test was used determine the actual suitability of the soils. Though <br /> the percolation tests may indicate a satisfactory percolation rate, the close proximity fluctuating <br /> ground water near the surface may impact the performance of a conventional septic system. This <br /> issue will be discussed later on in the report. <br /> L <br /> 7 <br />