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60 <br /> December 16,2003 <br /> Job Number: LG03-304 <br /> Page 8 <br /> Table 2. <br /> Selected soil properties of the surrounding area. <br /> (San Joaquin County soil survey report) <br /> r„ Soil Name and Map Depth(in) Unified Soil Salinity Soil Septic tank <br /> Symbol Classification mmhos/cm Reaction absorption <br /> PH fields <br /> Bruella sandy loam, 0-8: Sandy loam. SC-SM,SM <2 6.6-7.8 Severe: <br /> hard substratum 0 to Sc peres slowly. <br /> 2 percent slopes, 8-42: Sandy loam, SC <2 6.6-7.8 <br /> 112. sandy clay loam. <br /> 42-60:Clay loam,silty SC <2 7.4-8.4 <br /> clay loam,clay. <br /> San Joaquin loam, 0-12:Loam. CL-ML,ML <2 5.6-6.5 Severe: <br /> thick surface,0 to 2 12-26:Sandy clay CL <2 6.1-7.3 cemented pan. <br /> percent slopes,240. loam. <br /> 26-35:Clay loam clay. CL <2 6.1-7.8 <br /> ~` <br /> 35-60: Indurated I — I — I — <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> ` 5.3 Soil Lithology Observed and Septic Applicability <br /> Generally, the soil encountered in the borings is similar to the soils reported by the San Joaquin <br /> County Soil Survey soil for the area(USDA, 1992). Table 3 presents the soil log for the 25-foot <br /> soil boring at P-1. <br /> Table 3. <br /> Soil Boring Log for P-1 deep. <br /> .,. Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-5 Reddish brown silty sand,slightly cemented. SP <br /> 5-20 Reddish brown sandy silt,highly cemented. ML <br /> 20-22.5 Brown clay,cemented. CL <br /> Note: Descriptions are representative of soil conditions encountered in all four borings. <br /> The soil appears to be fairly consistent through the depths explored when compared with the soil <br /> log of percolation test P-1 (deep test). The drilling of the percolation test borings for proposed <br /> Parcel 2 and proposed Parcel 3 encountered difficult drilling due to cemented soil conditions. It <br /> is known from experience this area in the county has a thick hardpan layer with a varying degree <br /> �pE RSO <br /> r. ♦ N <br /> = r. <br /> O � <br /> 7SSOL♦ <br />