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L <br /> L September 10, 2004 <br /> NOA Project Number: E040104A <br /> Table 5. <br /> - San Joaquin County Soil Survey - <br /> Selected Soil Properties 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 /> Jacktone 0-22: Clay,CL,CH. <2 6.6-8.4 0.06-0.2 Severe: <br /> clay,0-2% 22-34: Clay loam,clay,silty clay,CL, <2 7.9-9.0 0.060.2 cemented <br /> slopes, 180. CH. pan,Peres <br /> 34-37: Indurated. — — — slowly <br /> 37-46: Loam,clay loam,CIrML,CL. <2 7.9-9.0 0.2-0.6 <br /> 4660: Cemented. — — — <br /> ,. Stockton 0-29: Clay,CL,CH. <2 7.4-8.4 0.06-0.2 Severe: <br /> clay,0-2% 29-37: Clay,silty clay,CL,CH. <2 7.4-8.4 0.060.2 peres slowly <br /> slopes,250. 37-42: Clay loam,silty clay loam,CL. <2 7.4-8.4 0.060.2 <br /> 42-60: Cemented. — — — <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> 5.1 Soil Boring Locations <br /> Twelve soil borings were advanced on the Site, six to a depth of 25 feet and six to three feet <br /> depth. The soil borings were used later for percolation test holes; the locations of the borings <br /> are indicated in Plate 1. <br /> 5.2 Soil Boring Dimensions <br /> The soil borings were 25 or three feet deep, as noted above, and were six inches in diameter. <br /> 5.3 Soil Lithology Observed <br /> Generally,the soil encountered in the boring is similar to the soils reported by the San <br /> Joaquin County Soil Survey for the area (USDA, 1992). Table 6 presents a representative soil <br /> log for the 25-foot deep soil borings. Conditions were comparable in all the deep borings, <br /> though the proportion of clay present at the 20 to 25-foot layer varied from hole to hole. The <br /> Vsoils at P-6 were observed to be slightly cemented. <br /> L <br /> Ir <br /> 8 I <br /> i <br />