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1 <br /> l 7 <br /> `i September 30,2007 <br /> NOA Project Number: E07146A <br /> n San Joaquin County Soil Survey <br /> J / Selected Soil Properties of On-Site Soils. <br /> Y Soil Name Depth Unified Soil Classification Salinity Soil Petme- 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 /> 0-2% <br /> slopes,112. <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> Al 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 /> F! feet. The soil borings were used later for percolation test holes; the locations of the borings are <br /> indicated in Plate 1. <br /> A.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 /> I 0-3.5 Brown,sandy loam SM <br /> 1 ' ' 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 /> F', 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 /> Fgrained soils have much greater potential for percolation than fine-grained or cemented soils. <br /> F7 <br /> 6 <br /> Il <br />