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IN <br /> r. February 6,2006 <br /> NOA Project Number: E05173A <br /> Soil Name Depth Unified Soil Classification Salinity Soil Perme- Septic tank <br /> and Map (in) mmhos/ Reaction ability absorption <br /> Symbol cm pH (in/hr) fields <br /> Capay Clay, 0-20: Clay:CH,CL <4 6.6-8.4 0.06-0.2 Severe:peres <br /> wet,0-2% 20-44: Clay,silty clay:CH,CL <4 6.6-8.4 0.06-0.2 slowly <br /> slopes,121 4460: Silty clay loam,clay loam: CL <4 6.6-8.4 0.06-0.2 <br /> VNote:The table descriptions do not necessarily reflect site-specific soil properties. <br /> L5.1 Soil Boring Locations <br /> Six'botings were drilled to a depth of approximately three and a half feet by NATatqries, <br /> Modesto, California. The soil borings were later used as percolation test holes; s tPln1 d the <br /> Percolation Test Forms in the appendix for the boring locations. <br /> 5.2 Soil Boring Dimensions <br /> The shallow soil borings were between four and six inches in diameter. <br /> 5.3 Soil Lithology Observed <br /> Generally, the soil encountered in the borings is similar to the soil reported by the San Joaquin <br /> LCounty Soil Survey for the area (USDA, 1992). Table 5presents the soil logs for the borings on the <br /> subject property. <br /> Table 5. <br /> Soil Boring Log for Parcels 1-6. <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3.5,max depth Dark Brown,-silty cla SC <br /> 5.4 Discussion of Soil Lithology <br /> L <br /> A silty clay soil type generally has a low potential for percolation. A percolation test is the best <br /> method to determine the suitability of the soils for a septic disposal area. Please see the next section <br /> for percolation test results. Generally speaking, coarser grained soils have much greater potential for <br /> percolation than fine-grained soils. <br /> 6' 6.0 PERCOLATION TEST INFORMATION <br /> L6.1 Percolation Test Locations <br /> A site map indicating the locations of the percolation test holes is included a Plate 1 of this report. <br /> L <br /> 7 <br /> L '.'04 <br /> L <br />