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F1 <br /> F! April 20, 2004 <br /> NOA Project Number: E04002A <br /> Page 8 F,' T <br /> y 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 25-foot <br /> F <br /> deep soil boring.. <br /> Table 4. <br /> Soil Boring Lo P-1 <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> F1 <br /> 0-5 Loose cobbles and gravel with light brown silt. GW <br /> 5-10 Light brown silty sand with little clay SP <br /> 10-15 Red/brown silt with little clay ML <br /> 15-25 Red/brown silty clay CL <br /> Note: Descriptions are representative of both shallow and deep boring locations. <br /> Percolation rate is one important measure of septic system applicability. Based on the <br /> percolation rate of the deep soil zone—described later in the report— , the deep soil zone has <br /> r demonstrated a satisfactory percolation rate according to the EHD. The shallow percolation tests <br /> have not demonstrated'a satisfactory percolation rate.-- The utilization of seepage pits in <br /> P <br /> conjunction with shallow leach lines should be utilized for the septic system disposal field. <br /> Since a deep percolation test achieved a satisfactory percolation rate, the Site has met the EHD <br /> requirement for a satisfactory percolation test."'Construction of the septic system should follow <br /> I the requirements of the EHD Sewage Standards. <br /> F1 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Boring Locations <br /> Two shallow and two deep percolation tests were conducted within the area designated for a <br /> sewage disposal system, though only two were evaluated by EHD_. Please refer to the scaled site <br /> plan for the exact locations (Plate I)- <br /> Fit <br /> P <br />