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March 19, 2C <br /> NOA Project <br /> Page 7 <br /> Soil Name Septic <br /> and Map tank <br /> Symbol bsorption <br /> fields <br /> Jacktone- Severe: <br /> Urban land :emented <br /> complex, 34-37 Indurated. --- --- <br /> pan,peres <br /> 181. 37-46 Loam,clay loam,CL-ML,CL. ? 7.9-9.0 0.2-0.6 slowly. <br /> 46-60 Cemented. --- --- --- <br /> Stockton 0-12 Silty clay loam,ML. '' 7.4-8.4 0.2-0.6 Severe: <br /> silty clay 12-34 Clay,silty clay,CL,CH. ? 7.4-8.4 0.06-0.2 peres <br /> loam,249. 34-47 Clay loam,silty clay loam,CL. 7.9-8.4 0.06-0.2 slowly. <br /> 47-60 ML. --- --- --- <br /> Cemented. <br /> Urban \ NA NA NA NA NA <br /> Land,260. <br /> `" Note•The table descriptions pec - sor prone e <br /> r, NA=Information not available for Urban Land area,over 80%of area covered by buildings. <br /> The soil survey indicated that the soil types neighboring the site are composed of clay and clay <br /> ` loam soils. Both soils typically exhibit poor percolation pro erties and are often problematic for <br /> shallow trench septic systems (Plate 7). <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 4 presents the soil log for the 22-foot <br /> deep soil boring. <br /> Table 4. <br /> Soil Boring Lo P-1 <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-23 Dark brown/gray clayey silt with sand,some ML and CL <br /> thin layers of clay(CL) <br /> 23-25 Brown silty sand. SP <br /> Note:Descriptions are representative of both shallow and deep borings. <br />