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6= ..i <br /> July 28, 2006 <br /> NOA Project Number: E06068A <br /> San Joaquin County Soil Survey <br /> Selected Soil Properties of On-Site Soils. <br /> Soil Name Depth Unified Soil Classification Salinity Soil Perme- Septic tank <br /> and Map (in) mmhos/cm Reaction ability absorption <br /> Symbol pH (in/hr) fields <br /> Bruella 0-8: Sandy loam;SC-SM,SM <2 6.1 -7.3 2.0-6.0 Severe:peres <br /> sandy loam, 8-42: Sandy loam,sandy clay loam;SC <2 6.1 -7.3 0.2-0.6 slowly <br /> hard 42-60: Sandy clay loam,sandy clay;SC <2 6.1 -7.3 0.2-0.6 <br /> substratum, <br /> i 0-2% <br /> L I slopes,112. <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> LJ 5.1 Soil Boring Locations <br /> A total of one soil boring was advanced on the Site to a depth of approximately three and a half feet. <br /> The soil boring was used later for a percolation test hole; the location of the boring is indicated in <br /> Plate 1. <br /> t �5.2 Soil Boring Dimensions <br /> LThe soil boring was three and a half, as noted above, and was four inches in diameter. <br /> 5.3 Soil Lithology Observed <br /> LGenerally, 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). The following table presents the representative soil <br /> log for the three and a half foot deep soil boring. Conditions were comparable in the shallow holes. <br /> L <br /> Soil Boring Log. <br /> LDepth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3.5 Brown,moist,clayey silt �B <br /> J 5.4 Discussion of Soil Lithology <br /> A visual inspection of the soils from on-site drilling indicates some potential for percolation because <br /> of the silty nature of the soils. A percolation test is the best method to determine the suitability of <br /> the soils. Please see the next section for percolation test results. Generally speaking,coarser grained <br /> soils have much greater potential for percolation than fine-grained or cemented soils. <br /> L <br /> 7 <br /> L <br />