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August 8, 2006 <br /> NOA Project Number: U06087A <br /> t <br /> _< inches in diameter. <br /> 5.3 Soil Lithology Observed <br /> R ' <br /> Generally, the soil encountered in the boring is similar to the soils reported by the San Joaquin <br /> County Soil Survey for the area (USDA, 1992). Table 4 presents the soil logs for the 25 foot deep <br /> soil borings. The soils were found to be similar at both locations. Conditions were also comparable <br /> in the shallower borings on each parcel. <br /> Table 4. <br /> Soil Boring Log Subject Property (Shallow and Deep). <br /> v� <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> i <br /> i0-2.5 Dark brown,moist clay CL <br /> 2.5-5 Light brown,silty clay CL <br /> 5-7.5 Light brown silty sand SM C� <br /> i <br /> 7.5-15 Light brown,clayey silt ML / <br /> I 15-17.5 Reddish brown,sandy clay SC <br /> ' 17.5-25 r Reddish brown,silty c12CL <br /> 1 Note:Descriptions are representative of soil conditions encountered in both shallow and deep borings. <br /> f <br /> 5.4 Discussion of Soil Lithology <br /> A visual inspection of the deep soils from on-site drilling indicates some potential for satisfactory <br /> 4 percolation. A percolation test is the best method to determine the suitability of the soils for a 0.46 <br /> septic disposal area. Please see the next section for percolation test results. Generally speaking, <br /> coarser grained soils have much greater potential for percolation than fine-grained soils. <br /> r 6.0 PERCOLATION TEST INFORMATION <br /> l { <br /> 6.1 Percolation Test Locations <br /> x A site map indicating the locations of the percolation test holes is included as Plate 1 of this report. . <br /> 6.2 Number of Percolation Tests <br />} Three shallow and three deep percolation tests were conducted the Site. <br /> ucteon e e. L <br />� �y <br /> 7 <br />