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Mr.Jim Hoagland January 19,2004 Page 8 5.2 Soil Properties in the Vicinity ` The site is located on Urban Land soil. Information from the Soil Conservation Service is not available due to the land being covered and altered by urban growth. Selected soil properties neighboring the Urban Land area is summarized in the following table and can be located on Plate 7. ` Table 3. -San Joaquin County Soil Survey- Selected Soil Properties of Onsite Soils. z `- Soil Name Depth Unified Soil Classification Salinity Soil Perme- Septic and Map (in) mmhos/ Reaction ability tank Symbol cm pH in/hr absorption fields Jahant 0-5 Loam,ML. <2 6.1-7.3 0.06-2.0 Severe: loam, 183. 5-31 Loam,clay loam,CL-ML,CL. <2 6.1-7.3 0.06-2.0 cemented 31-49 Clay,clay loam,CH,CL. <2 6.1-7.3 <0.06 pan,peres 49-53 Cemented. --- --- --- slowly. 53-60 Indurated. --- - `` Stockton 0-12 Silty clay loam,ML. <2 7.4-8.4 0.2-0.6 Severe: silty clay 12-34 Clay,silty clay,CL,CH. <2 7.4-8.4 0.06-0.2 peres loam,249. 34-47 Clay loam,silty clay loam,CL, <2 7.9-8.4 0.06-0.2 slowly. 47-60 ML. --- --- --- Cemented. Urban NA NA NA NA NA, NA Land,260. Note:The table descriptions do not necessarily reflect site-specific soil properties. NA=Information not available for Urban Land area,over 80%of area covered by buildings. The soil survey indicated that the soil type neighboring the site are composed of loam and clay loam soils. Clay loam soils typically exhibit poor percolation properties and are often problematic for shallow trench septic systems(Plate 7). 5.3 Soil Lithology Observed and Septic Applicability Generally, the soil encountered in the borings is similar to the soils reported by the San Joaquin County Soil Survey soil for the area(USDA, 1992). Table 4 presents the soil log for the 25-foot deep soil boring. �pE RSO v 1 D M Z •' 9gS O L� P