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f <br /> bJ <br /> September 30,2007 <br /> f NOA Project Number: E07146A <br /> San Joaquin County Soil Survey <br /> / Selected Soil Properties of On-Site Soils. <br /> V Soil Name Depth Unified Soil Classification Salinity Soil Perme- Septic tank <br /> and Map (in) mmhos/cm Reaction ability absorption <br /> Symbol pH (in/ht) fields <br /> Bruella 0-8: Sandy loam;SC-SM,SIVI <2 6.1 -7.3 2.0-6.0 Severe:peres <br /> sandy loam, 5-42: 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 /> 0-2% <br /> slopes,112. <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> A.1 Soil Boring Locations <br /> A total of two soil borings were advanced on the site to a depth of approximately three and a half <br /> feet. The soil borings were used later for percolation test holes; the locations of the borings are <br /> ` /indicated in Plate 1. <br /> �/ 5.2 Soil Boring Dimensions <br /> The soil borings were approximately three and a half feet deep, as noted above, and were four <br /> inches in diameter. <br /> ✓5.3 Soil Lithology Observed <br /> Generally, the soil encountered in the borings 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 /> Soil Boring Log. <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3.5 Brown,sandy loam SM <br /> 1/5.4 Discussion of Soil Lithology <br /> A visual inspection of the soils from on-site drilling indicates potential for percolation because of the <br /> ' coarse grained nature of the soils. A percolation test is the best method to determine the suitability <br /> of the soils. Please see the next section for percolation test results. Generally speaking, coarser- <br /> grained soils have much greater potential for percolation than fine-grained or cemented soils. <br /> [ J <br /> 6 <br />