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Soil Name Salinity Soil Perme- Septic <br /> Depth tank <br /> and Map Unified Soil Classification mmhos Reaction. ability <br /> Symbol (�n) /cm pH (in/hr) absorptio <br /> n fields <br /> Columbia, 0-12: Fine sandy loam; SM, SC-SM <2 6.1 - 7.8 2.0 - 6.0 Moderate: <br /> 130 Stratified sand to silt loam; SM flooding, <br /> 12-60: <2 6.1 - 7.8 2.0 - 6.0 peres, <br /> slowly. <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> i <br /> * See description of the map unit for composition and behavior characteristics of the map unit. <br /> I <br /> 1.5.1 Soil_Boring Locations <br /> r; <br /> A total of two (2) soil borings were advanced on the Site, one (1) boring to a depth of 3.30 feet <br /> and one (1) groundwater boring to a depth of 8.5 feet. The shallow soil boring was used later <br /> for a percolation test hole; the location of the borings is indicated in Plate 1. <br /> 1.5.2 Soil Boring Dimensions <br /> The soil borings were 3.30 and 8.5 feet, as noted above, and were four (4) inches in diameter. <br /> 1.5.3 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 table below presents the soil log for the soil <br /> borings. Conditions were comparable in the shallower holes. <br /> Table 2. <br /> Soil Boring Log. <br /> Depth interval (ft) Soil Type Unified Soil Classification <br /> 0-3.5 Medium brown, sandy silt 5M <br /> 3.5-8.5 Brown silty sand SM <br /> 1.5.4 Discussion of Soil Litholonv <br /> A visual inspection of the soils from on-site drilling indicates potential for percolation because of <br /> the coarse-grained nature of the soils. A percolation test is the best method to determine the <br /> suitability of the soils for a septic disposal area. Please see the next section for percolation test <br /> results. Generally speaking, sandy soils have much greater potential for percolation than fine- <br /> grained or cemented soils. <br /> "044 <br /> 902 Industrial Way-Lodi,CA 95240.209.367.3701 -Fax 209.369.4228 ©2008 Neil O.Anderson&Associates,Inc <br />