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Bird Road Facility Page 5 of 13 <br /> ., Project Number: E07183A <br /> November 30, 2007 <br /> Table 1 presents some selected properties of the soils: <br /> Table 1. <br /> San Joaquin County Soil Survey <br /> Selected Soil Pro erties 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 /> Capay 0-20: Clay: CH, CL <2 6.6 - 8.4 0.06 - Severe: <br /> Clay, 0-2% 20-60: Clay, silty clay: CL, CH <2 6.6 - 8.4 0.2 peres slowly <br /> slopes, 0.06 - <br /> 118, 119 <br /> .06 - <br /> 118, 119 0.2 <br /> Vernalis 0-9: Clay loam: CL <2 6.6-8.4 0.2-0.6 Severe: <br /> Clay Loam, 9- Loam, silt loam, clay loam: <2 7.4-8.4 0.6 2.0 peres slowly <br /> 0-2% 47: CL, CL-ML <2 7.9-8.4 0.6-2.0 <br /> slopes 47-60: Stratified sandy loam to silty <br /> 268 clay loam: CL, CL-ML <br /> I.5.1 Soil Boring Locations <br /> A total of one soil boring as advanced on the Site to a depth of approximately 3.5 feet. The soil <br /> boring was used later for a percolation test hole; the location of the boring is indicated in Plate <br /> .. 1. <br /> I.5.2 Soil Boring Dimensions <br /> The soil boring was approximately 3.5 feet in depth and four (4) inches in diameter. <br /> I.5.3 Soil Lithology Observed <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). The table below presents the soil log for the soil <br /> boring. <br /> Table 2. <br /> Soil Boring Log. <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 0-3.3 Tannish brown clayey silt ML <br /> I.5.4 Discussion of Soil Litholoav <br /> A visual inspection of the soils from on-site drilling indicates some potential for percolation <br /> because of the 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 /> r 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 ©2007 Neil O.Anderson&Associates.Inc <br />